BS EN ISO 12944‑1:2017
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
BSI Standards Publication
Paints and varnishes — Corrosion protection of
steel structures by protective paint systems
Part 1: General introduction
BS EN ISO 12944‑1:2017
BRITISH STANDARD
National foreword
This British Standard is the UK implementation of
EN ISO 12944‑1:2017. It is identical to ISO 12944‑1:2017. It supersedes
BS EN ISO 12944‑1:1998, which is withdrawn.
The UK participation in its preparation was entrusted to Technical
Committee STI/21, Paint systems and surface preparation for
metallic substrates.
A list of organizations represented on this committee can be obtained on
request to its secretary.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
This publication does not purport to include all the necessary provisions
of a contract. Users are responsible for its correct application.
© The British Standards Institution 2018
Published by BSI Standards Limited 2018
ISBN 978 0 580 91029 6
ICS 87.020; 91.080.10
Compliance with a British Standard cannot confer immunity from
legal obligations.
This British Standard was published under the authority of the
Standards Policy and Strategy Committee on 31 January 2018.
Amendments/corrigenda issued since publication
Date
Text affected
BS EN ISO 12944‑1:2017
EN ISO 12944-1
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2017
ICS 87.020; 91.080.13
Supersedes EN ISO 12944-1:1998
English Version
Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 1: General
introduction (ISO 12944-1:2017)
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
Peintures et vernis - Anticorrosion des structures en
acier par systèmes de peinture - Partie 1: Introduction
générale (ISO 12944-1:2017)
Beschichtungsstoffe - Korrosionsschutz von
Stahlbauten durch Beschichtungssysteme - Teil 1:
Allgemeine Einleitung (ISO 12944-1:2017)
This European Standard was approved by CEN on 30 October 2017.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2017 CEN
All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.
Ref. No. EN ISO 12944-1:2017 E
BS EN ISO 12944‑1:2017
EN ISO 12944-1:2017 (E)
European foreword
This document (EN ISO 12944-1:2017) has been prepared by Technical Committee ISO/TC 35 “Paints
and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2018, and conflicting national standards shall be
withdrawn at the latest by June 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
This document supersedes EN ISO 12944-1:1998.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 12944-1:2017 has been approved by CEN as EN ISO 12944-1:2017 without any
modification.
3
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

Contents
Page
Foreword......................................................................................................................................................................................................................................... iv
Introduction...................................................................................................................................................................................................................................v
1
2
3
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
4
5
6
7
Scope.................................................................................................................................................................................................................................. 1
Normative references....................................................................................................................................................................................... 1
Terms and definitions...................................................................................................................................................................................... 2
General introduction to the ISO 12944 series........................................................................................................................ 3
4.1
Summary....................................................................................................................................................................................................... 3
4.2
Protective functions covered....................................................................................................................................................... 3
4.3
Field of application............................................................................................................................................................................... 3
4.3.1
Overview.................................................................................................................................................................................. 3
4.3.2
Type of structure.............................................................................................................................................................. 4
4.3.3
Type of surface and surface preparation..................................................................................................... 4
4.3.4
Type of environment..................................................................................................................................................... 4
4.3.5
Type of protective paint system........................................................................................................................... 4
4.3.6
Type of work......................................................................................................................................................................... 4
4.3.7
Durability of the protective paint system.................................................................................................... 5
General considerations and requirements................................................................................................................................ 5
Health and safety and environmental protection............................................................................................................... 6
Information on the other parts of ISO 12944.......................................................................................................................... 6
Annex A (informative) Guidelines for using ISO 12944 (all parts) for a given project...................................... 8
Bibliography................................................................................................................................................................................................................................. 9
© ISO 2017 – All rights reserved

iii
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 14, Protective paint systems for steel structures.
This second edition cancels and replaces the first edition (ISO 12944-1:1998), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— some parts of the scope have been moved to Clause 4;
— the terms and definitions which were not used in the main part of the standard have been deleted;
— the normative references have been updated;
— the requirements regarding sample areas have been included;
— 7.8 with reference to ISO 12944-9 has been added.
— a bibliography has been added.
A list of all parts in the ISO 12944 series can be found on the ISO website.
iv

© ISO 2017 – All rights reserved
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

Introduction
Unprotected steel in the atmosphere, in water and in soil is subjected to corrosion that can lead to
damage. Therefore, to avoid corrosion damage, steel structures are normally protected to withstand
the corrosion stresses to which they will be subjected during the service life required of the structure.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
There are different ways of protecting steel structures from corrosion. ISO 12944 (all parts) deals with
protection by paint systems and covers, in the various parts, all features that are important in achieving
adequate corrosion protection. Additional or other measures are possible but require particular
agreement between the interested parties.
In order to ensure effective corrosion protection of steel structures, owners of such structures, planners,
consultants, companies carrying out corrosion protection work, inspectors of protective coatings
and manufacturers of coating materials need to have at their disposal state-of-the-art information in
concise form on corrosion protection by paint systems. It is vital that such information is as complete as
possible, unambiguous and easily understandable to avoid difficulties and misunderstandings between
the parties concerned with the practical implementation of protection work.
ISO 12944 (all parts) is intended to give this information in the form of a series of instructions. It is
written for those who have some technical knowledge. It is also assumed that the user of ISO 12944 (all
parts) is familiar with other relevant International Standards, in particular those dealing with surface
preparation.
Although ISO 12944 (all parts) does not deal with financial and contractual questions, attention is
drawn to the fact that, because of the considerable implications of inadequate corrosion protection,
non-compliance with requirements and recommendations given in ISO 12944 (all parts) can result in
serious financial consequences.
© ISO 2017 – All rights reserved

v
BS EN ISO 12944‑1:2017
INTERNATIONAL STANDARD
ISO 12944-1:2017(E)
Paints and varnishes — Corrosion protection of steel
structures by protective paint systems —
Part 1:
General introduction
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
1 Scope
This document defines the overall scope of ISO 12944 (all parts). It gives some basic terms and
definitions and a general introduction to the other parts of ISO 12944. Furthermore, it includes a
general statement on health, safety and environmental protection, and guidelines for using ISO 12944
(all parts) for a given project.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4628-1, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 1: General introduction and
designation system
ISO 4628-2, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 2: Assessment of degree of
blistering
ISO 4628-3, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting
ISO 4628-4, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 4: Assessment of degree of
cracking
ISO 4628-5, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Part 5: Assessment of degree of flaking
ISO 12944-2, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 2: Classification of environments
ISO 12944-3, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 3: Design considerations
ISO 12944-4, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 4: Types of surface and surface preparation
ISO 12944-5, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 5: Protective paint systems
ISO 12944-6, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 6: Laboratory performance test methods
ISO 12944-7, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 7: Execution and supervision of paint work
© ISO 2017 – All rights reserved

1
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

ISO 12944-8, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 8: Development of specifications for new work and maintenance
ISO 12944-9, Paints and varnishes — Corrosion protection of steel structures by protective paint
systems — Part 9: Protective paint systems and laboratory performance test methods for offshore and
related structures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12944-2, ISO 12944-3,
ISO 12944-4, ISO 12944-5, ISO 12944-6, ISO 12944-7, ISO 12944-8, ISO 12944-9 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
coat
continuous layer of metal material or a continuous film of paint (3.6), resulting from a single application
3.2
corrosion
physicochemical interaction between a metal and its environment that results in changes in the
properties of the metal, and which can often lead to impairment of the function of the metal, the
environment or the technical system of which these form a part
[SOURCE: ISO 8044:2015, 2.1, modified — in the definition “may” has been replaced by “can often” and
Note 1 to entry has been deleted.]
3.3
corrosion damage
corrosion (3.2) effect which is considered detrimental to the function of the metal, the environment or
the technical system of which these form a part
3.4
corrosion stress
environmental factor which promotes corrosion (3.2)
3.5
durability
expected life of a protective paint system (3.8) to the first major maintenance painting
Note 1 to entry: Durability is a technical consideration/planning parameter that can help the owner set up a
maintenance programme (see 5.5).
3.6
paint
pigmented coating material which, when applied to a substrate (3.9), forms an opaque dried film having
protective, decorative or specific technical properties
[SOURCE: ISO 4618:2014, 2.184]
3.7
protective coating system
sum total of the coats (3.1) of metal materials and/or paints (3.6) or related products which are to be
applied or which have been applied to a substrate (3.9) to provide corrosion (3.2) protection
2

© ISO 2017 – All rights reserved
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

3.8
protective paint system
sum total of the coats (3.1) of paints (3.6) or related products which are to be applied or which have
been applied to a substrate (3.9) to provide corrosion (3.2) protection
3.9
substrate
surface to which the coating material is applied or is to be applied
Note 1 to entry: The substrate is considered to be carbon steel.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
3.10
spot repair
localized repair (including surface preparation) of deteriorated corrosion (3.2) protection system
3.11
partial refurbishment
spot repair (3.10) of coating defects followed by surface preparation and application of a minimum of
one top coat (3.1) over the whole area
3.12
total refurbishment
total removal of protective paint (3.6) system and application of a new one
3.13
sample area
area on which the properties of a newly applied coating are tested
4 General introduction to the ISO 12944 series
4.1 Summary
ISO 12944 (all parts) deals with the corrosion protection of steel structures by protective paint systems.
4.2 Protective functions covered
ISO 12944 (all parts) covers only the corrosion-protective function of paint systems. Other protective
functions, like protection against
— microorganisms (marine fouling, bacteria, fungi, etc.),
— chemicals (acids, alkalis, organic solvents, gases, etc.),
— mechanical action (abrasion, etc.), and
— fire
are not covered by ISO 12944 (all parts).
4.3 Field of application
4.3.1
Overview
The field of application is characterized by
— the type of structure,
— the type of surface and surface preparation,
— the type of environment,
© ISO 2017 – All rights reserved

3
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

— the type of protective paint system,
— the type of work, and
— the durability of the protective paint system.
Although ISO 12944 (all parts) does not cover all types of structure, surface and surface preparation, it
can, by agreement, also be applied to those cases which are not covered by ISO 12944.
The various aspects of the field of application are described in more detail in 4.3.2 to 4.3.7.
4.3.2
Type of structure
ISO 12944 (all parts) concerns structures made of carbon steel (e.g. in accordance with EN 100251 and EN 10025-2) of not less than 3 mm thickness, which are designed using an approved strength
calculation.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
Not covered by ISO 12944 (all parts) are concrete structures reinforced with steel.
4.3.3
Type of surface and surface preparation
ISO 12944 (all parts) deals with the following types of surface consisting of carbon or low-alloy steel,
and their preparation:
— uncoated surfaces;
— surfaces thermally sprayed with zinc, aluminium or their alloys;
— hot-dip-galvanized surfaces;
— zinc-electroplated surfaces;
— sherardized surfaces;
— surfaces painted with prefabrication primer;
— other painted surfaces.
4.3.4
Type of environment
ISO 12944 (all parts) deals with
— six corrosivity categories for atmospheric environments, and
— four categories for structures immersed in water or buried in soil: Im1, Im2, Im3, and Im4.
4.3.5
Type of protective paint system
ISO 12944 (all parts) covers a range of paint products which dry or cure at ambient conditions. Not
covered by ISO 12944 (all parts) are
— powder coating materials,
— stoving enamels,
— heat-cured paints, and
— protective coating on the inner surface of a tank (linings).
4.3.6
Type of work
ISO 12944 (all parts) covers both new work and maintenance.
4

© ISO 2017 – All rights reserved
BS EN ISO 12944‑1:2017
4.3.7
ISO 12944-1:2017(E)

Durability of the protective paint system
ISO 12944 (all parts) considers four different durability ranges (i.e. low, medium, high, and very high).
See 3.5 and Clause 5.
The durability range is not a “guarantee time”.
5 General considerations and requirements
5.1 Since the durability of a protective system is normally assumed to be shorter than the expected
service life of the structure, additional considerations shall be given at the planning and design stage to
the possibility of their maintenance or (partial or total) refurbishment.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
Sample areas provide guidance on the type of refurbishment and can also be used for the assessment of
the visual appearance.
5.2 Structural components which are exposed to corrosion stresses and which are no longer accessible
for corrosion protection measures after assembly shall be provided with corrosion protection that will
remain effective, and hence ensure the stability of the structure, for the duration of the service life of the
structure. If this cannot be achieved by means of protective coating systems, other measures shall be
taken (for example, manufacturing components from corrosion-resistant material, designing components
so that they are replaceable or the specification of a corrosion allowance).
5.3 The cost-effectiveness and sustainability of a given corrosion protection system will generally be
in direct proportion to the length of time for which effective protection is maintained, since the amount
of maintenance or replacement work required during the service life of the structure will be reduced to a
minimum.
5.4 The type of environmental conditions (4.3.4) and the durability of coatings systems (5.5) are the
main parameters for selecting the coating systems.
5.5 The level of coating failure before the first major maintenance painting shall be agreed upon by
the interested parties and shall be assessed in accordance with ISO 4628-1, ISO 4628-2, ISO 4628-3,
ISO 4628-4 and ISO 4628-5, unless otherwise agreed between the interested parties.
For example, the first major maintenance painting would normally need to be carried out for reasons
of corrosion protection once about 10 % of the coatings have reached Ri 3, as defined in ISO 4628-3.
This requirement may be applied to the whole structure or to representative sections as agreed upon
between involved parties, which may then be classified separately.
In this document, durability is expressed in terms of four ranges:
— low (L) up to 7 years;
— medium (M) 7 years to 15 years;
— high (H) 15 years to 25 years;
— very high (VH) more than 25 years.
The durability range is not a “guarantee time”. Durability is a technical consideration/planning
parameter that can help the owner set up a maintenance programme. A guarantee time is a consideration
that is the legal subject of clauses in the administrative part of the contract. The guarantee time is
usually shorter than the durability range. There are no rules that link the two periods of time.
© ISO 2017 – All rights reserved

5
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

6 Health and safety and environmental protection
It is the duty of clients, specifiers, contractors, paint manufacturers, inspectors and all other personnel
involved in a project to carry out the work for which they are responsible in such a manner that they do
not endanger the health and safety of themselves or others.
Items that will need particular attention are, for example, as follows:
— not specifying or using toxic or carcinogenic substances;
— emissions of volatile organic compounds (VOCs);
— measures against harmful effects of fumes, dust, vapours and noise, as well as fire hazards;
— protection of the body, including the eyes, the skin, the ears and the respiratory system;
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
— protection of water and soil during corrosion protection work;
— recycling of materials and waste disposal.
7 Information on the other parts of ISO 12944
7.1 ISO 12944-2 describes the corrosion stresses produced by the atmosphere, by different types of
water and by soil. It defines atmospheric-corrosivity categories and indicates the corrosion stresses to
be expected in situations where steel structures are immersed in water or buried in soil. The corrosion
stresses to which a steel structure is exposed represent one essential parameter governing the selection
of appropriate protective paint systems in accordance with ISO 12944-5.
7.2 ISO 12944-3 gives information on basic design criteria for steel structures for the purpose of
improving their resistance to corrosion. It gives examples of suitable and unsuitable designs, indicating,
with the help of diagrams, which structural elements and combinations of elements are likely to cause
accessibility problems during surface preparation work and when applying, inspecting and maintaining
paint systems. In addition, design features which facilitate the handling and transport of steel structures
are discussed.
7.3 ISO 12944-4 describes different types of surface to be protected and gives information on
mechanical, chemical and thermal surface preparation methods. It deals with surface preparation grades,
surface profile (roughness), assessment of prepared surfaces, temporary protection of prepared surfaces,
preparation of temporarily protected surfaces for further coatings, preparation of existing metal coatings,
and environmental aspects. As far as possible, reference is made to the basic International Standards on
the surface preparation of steel substrates before application of paints and related products. ISO 129444 is intended to be read in conjunction with ISO 12944-5 and ISO 12944-7.
7.4 ISO 12944-5 describes different generic types of paints on the basis of their chemical composition
and the type of film formation process. It gives examples of various protective paint systems that have
proved suitable for structures exposed to corrosive stresses and corrosivity categories described in
ISO 12944-2, reflecting current knowledge on a world-wide scale. ISO 12944-5 is intended to be read in
conjunction with ISO 12944-6.
7.5 ISO 12944-6 specifies laboratory test methods that are to be used when the performance of
protective paint systems is to be assessed. It is particularly intended for paint systems for which sufficient
practical experience is not yet available and covers testing of paint systems designed for application to
steel prepared by blast-cleaning, to hot-dip-galvanized steel and to thermally sprayed metallic coatings.
Atmospheric environments and immersion in water (fresh, brackish or sea water) are also covered.
7.6 ISO 12944-7 describes how paint work is to be carried out in the workshop or on site. It describes
methods for the application of coating materials. Handling and storage of coating materials before
6

© ISO 2017 – All rights reserved
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

application, inspection of the work and follow-up of the resulting paint system, as well as preparation of
reference areas, are also covered. It does not cover surface preparation work (see ISO 12944-4).
7.7 ISO 12944-8 gives guidance for developing specifications for corrosion protection work, describing
everything that has to be taken into account when a steel structure is to be protected against corrosion.
For the convenience of the user, ISO 12944-8 distinguishes between project specification, paint system
specification, paint work specification, and inspection and testing specification. Various annexes deal
with particular aspects such as planning of the work, reference areas and inspection, and offer models of
forms intended to facilitate the work.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
7.8 ISO 12944-9 describes requirements, test methods and assessment criteria for protective systems
under offshore and related conditions, classified as categories CX and Im4. ISO 12944-9 deals only
with the offshore part of the CX category. Requirements, test methods and acceptance criteria for other
extreme corrosive stresses included in category CX are agreed upon separately between the interested
parties.
© ISO 2017 – All rights reserved

7
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

Annex A
(informative)
Guidelines for using ISO 12944 (all parts) for a given project
In order to ensure effective corrosion protection, it is important that suitable specifications are written
for the project (see ISO 12944-8), taking the following items as the basis:
a)
analyse or estimate the corrosivity of the environment in the area where the structure is located or
is to be located (see ISO 12944-2);
c)
examine the design of the structure and make sure that corrosion traps have been avoided and
adequate access has been provided for corrosion protection work; avoid galvanic corrosion by
insulating dissimilar metals from each other (see ISO 12944-3);
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
b) establish any special conditions which may affect the choice of paint system to be used (see
ISO 12944-5);
d) for maintenance painting, assess the condition of the surface to be treated (see ISO 12944-4);
e)
f)
identify those paint systems with the required durability from those listed as being suitable for the
relevant environment (see ISO 12944-5), or from results of laboratory performance testing, if no
long-term experience is available (see ISO 12944-6);
select from the paint systems identified the optimum one, taking into consideration the method of
surface preparation which will be used (see ISO 12944-4);
g) make sure that damage to the environment and all health and safety risks are minimized (see
ISO 12944-1 and ISO 12944-8);
h) draw up a plan of work and select a method of application (see ISO 12944-7);
i)
j)
establish a programme of inspections to be carried out during and after the work (see ISO 12944-7
and ISO 12944-8);
establish a maintenance programme covering the whole service life of the structure.
NOTE
8
For detailed planning, see ISO 12944-8: 2017, Annexes C and D.

© ISO 2017 – All rights reserved
BS EN ISO 12944‑1:2017
ISO 12944-1:2017(E)

Bibliography
[1]
ISO 4618:2014, Paints and varnishes — Terms and definitions
[3]
ISO 9001, Quality management systems — Requirements
[2]
[4]
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
[5]
ISO 8044: 2015, Corrosion of metals and alloys — Basic terms and definitions
EN 10025-1, Hot rolled products of structural steels — Part 1: General technical delivery conditions
EN 10025-2, Hot rolled products of structural steels — Part 2: Technical delivery conditions for nonalloy structural steels
© ISO 2017 – All rights reserved

9
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
This page deliberately left blank
NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW
British Standards Institution (BSI)
BSI is the national body responsible for preparing British Standards and other
standards-related publications, information and services.
Licensed copy:Coffey Geotechnics, 07/05/2018, Uncontrolled Copy, © BSI
BSI is incorporated by Royal Charter. British Standards and other standardization
products are published by BSI Standards Limited.
About us
Reproducing extracts
We bring together business, industry, government, consumers, innovators
and others to shape their combined experience and expertise into standards
-based solutions.
For permission to reproduce content from BSI publications contact the BSI
Copyright & Licensing team.
The knowledge embodied in our standards has been carefully assembled in
a dependable format and refined through our open consultation process.
Organizations of all sizes and across all sectors choose standards to help
them achieve their goals.
Information on standards
We can provide you with the knowledge that your organization needs
to succeed. Find out more about British Standards by visiting our website at
bsigroup.com/standards or contacting our Customer Services team or
Knowledge Centre.
Buying standards
You can buy and download PDF versions of BSI publications, including British
and adopted European and international standards, through our website at
bsigroup.com/shop, where hard copies can also be purchased.
If you need international and foreign standards from other Standards Development
Organizations, hard copies can be ordered from our Customer Services team.
Copyright in BSI publications
All the content in BSI publications, including British Standards, is the property
of and copyrighted by BSI or some person or entity that owns copyright in the
information used (such as the international standardization bodies) and has
formally licensed such information to BSI for commercial publication and use.
Save for the provisions below, you may not transfer, share or disseminate any
portion of the standard to any other person. You may not adapt, distribute,
commercially exploit, or publicly display the standard or any portion thereof in any
manner whatsoever without BSI’s prior written consent.
Storing and using standards
Standards purchased in soft copy format:
• A British Standard purchased in soft copy format is licensed to a sole named
user for personal or internal company use only.
• The standard may be stored on more than 1 device provided that it is accessible
by the sole named user only and that only 1 copy is accessed at any one time.
• A single paper copy may be printed for personal or internal company use only.
• Standards purchased in hard copy format:
• A British Standard purchased in hard copy format is for personal or internal
company use only.
• It may not be further reproduced – in any format – to create an additional copy.
This includes scanning of the document.
If you need more than 1 copy of the document, or if you wish to share the
document on an internal network, you can save money by choosing a subscription
product (see ‘Subscriptions’).
Subscriptions
Our range of subscription services are designed to make using standards
easier for you. For further information on our subscription products go to
bsigroup.com/subscriptions.
With British Standards Online (BSOL) you’ll have instant access to over 55,000
British and adopted European and international standards from your desktop.
It’s available 24/7 and is refreshed daily so you’ll always be up to date.
You can keep in touch with standards developments and receive substantial
discounts on the purchase price of standards, both in single copy and subscription
format, by becoming a BSI Subscribing Member.
PLUS is an updating service exclusive to BSI Subscribing Members. You will
automatically receive the latest hard copy of your standards when they’re
revised or replaced.
To find out more about becoming a BSI Subscribing Member and the benefits
of membership, please visit bsigroup.com/shop.
With a Multi-User Network Licence (MUNL) you are able to host standards
publications on your intranet. Licences can cover as few or as many users as you
wish. With updates supplied as soon as they’re available, you can be sure your
documentation is current. For further information, email subscriptions@bsigroup.com.
Revisions
Our British Standards and other publications are updated by amendment or revision.
We continually improve the quality of our products and services to benefit your
business. If you find an inaccuracy or ambiguity within a British Standard or other
BSI publication please inform the Knowledge Centre.
Useful Contacts
Customer Services
Tel: +44 345 086 9001
Email (orders): orders@bsigroup.com
Email (enquiries): cservices@bsigroup.com
Subscriptions
Tel: +44 345 086 9001
Email: subscriptions@bsigroup.com
Knowledge Centre
Tel: +44 20 8996 7004
Email: knowledgecentre@bsigroup.com
Copyright & Licensing
Tel: +44 20 8996 7070
Email: copyright@bsigroup.com
BSI Group Headquarters
389 Chiswick High Road London W4 4AL UK
This page deliberately left blank