WÜRTH Industrie Service
INNOVATIVE
surfAcE sysTEms
With maximum corrosion resistances
Table of Contents:
Page
Preface
2
Würth Surface Systems
3
Construction Notes
4
Performance Characteristics
5-6
Electrolytic Metal Coatings
7-8
Non-Electrolytic Metal Coatings
9
Compatibility Table
10
Liability:
All information in this brochure has been carefully researched and compiled. Nevertheless, errors can occur, details can be translated incorrectly, information may
be missing or the information provided may have changed in the meantime. Therefore we do not assume any guarantee or liability for the correctness, completeness,
topicality or quality of the information provided. We do not accept any liability for damages, especially direct or indirect as well as material or immaterial arising from
the use or misuse of information given in this brochure unless not based on intent or gross negligence of our part.
Dear customer of Würth Industrie Service!
Within the Würth group Würth Industrie Service GmbH &
The coated fasteners in stock decisively expand our stan-
Co. KG is responsible for delivering industrial customers. In
dard product range and completely meet the requirements
1999 the company was founded as an independent com-
of several company standards in the field of the automotive
pany and since that date it is operating from its location at
industry as well as the machinery and plant engineering.
the Industriepark Würth in Bad Mergentheim/Germany.
In addition to the products Würth Industrie Service proviThe wide range of C-parts adapted to the needs of spe-
des competent and individual technical customer service.
cific target groups and the unique supply concept make
Würth Industrie Service be your competent partner for
Learn more about Würth Surface Systems in this brochure!
C-parts. The product range of Würth Industrie Service is
focused on industrial requirements for production needs,
We look forward to a cooperative partnership and thank
small parts and assembly material for the construction of
you for your confidence.
plants, machines and vehicles as well as the maintenance
equipment.
Würth Industrie Service provides market support and consequently analyses the current needs and the future requi-
Dr. Uwe Hasselmann,
rements of all customers.
Head of Technical Department
INNOVATIVE surfAcE sysTEms 2
Würth Surface Systems
Chromium(VI)-free corrosion protection coatings are state of the art in coating technology
After thorough market analyses and several standardisa-
the right to choose the type of coating depending on
tion processes the surface systems have been developed
the licensor and the coating company. The surface sys-
for a wide field of applications. We succeeded in reducing
tems we offer clearly exceed the requirements on cor-
the number of systems on only five. You find an overview
rosion protection according to the different standards
of the systems on pages five and six, a detailed descrip-
(DIN EN ISO 4042, DIN EN ISO 10683 and
tion of the individual surfaces from pages seven to nine.
DIN 50979).
The requirements to be met are fulfilled by audited
suppliers and are regularly checked by our quality assurance laboratory. Würth Industrie Service reserves
Choosing the new Würth Surface Systems you have the following advantages:
• Repeatable preload forces due to defined coefficients of friction for all coating systems
• Conforms to the latest environmental laws:
-
EU Directive 2011/65/EU „RoHS“
EU Directive 2012/19/EU „WEEE“
EU Directive 2000/53/EU on end-of-life vehicles
VDA list (GADSL)
REACh Regulation EG 1907/2006 „REACh“
• Maximum corrosion resistances
• Uniform surface designations
• Maximum quality standard
• Cost savings due to a reduced number of different parts
3 INNOVATIVE surfAcE sysTEms
Construction Notes
Which coating type for which application?
Searching the optimum corrosion protection there are a large number of factors to observe.
Factors are:
-
the environment
the respective component material
the design of the part
as well as legal and normative requirements.
Our product and application service would be happy to help you find the optimum coating for your specific application.
High-strength parts
Disadvantages of electroplated coatings on parts with property class 10.9 or more (zinc, zinc-nickel alloys) can be compensated by zinc flake coatings. There is an increased risk of hydrogen embrittlement if high-strength or case-hardened
parts have got an electroplated surface coating. This applies to fasteners having a core or surface hardness higher than
320 HV or a tensile strength of more than 1,000 MPa. Any further treatment of the parts (e.g. heat treatment) cannot
completely exclude hydrogen embrittlement according to DIN EN ISO 4042.
Trueness to gauge size of zinc flake coatings
Würth Surface Systems with zinc flake coating are only availble for thread diameters ≥ M6. The reason for this is that
thread pitches smaller than 1 mm are not completely true to gauge size. Therefore and in accordance with the latest
technical standards zinc flake coatings can only be used without restrictions for thread components ≥ M6. In cooperation
with licensors and coating engineers we are currently developing reliable solutions for dimensions ≤ M5. Nevertheless,
restrictions on the lifetime of corrosion protection have to be accepted for some cases.
Zinc flake coatings on products with internal drives
If you use zinc flake coatings for products with internal drives smaller than M6, undesirable material accumulation may
occur. In this case an optimum load transmission cannot be ensured.
INNOVATIVE surfAcEsysTEms 4
Performance Characteristics
Designation
ZSML
ZNSHL
ZNBHL
ZFSHL
ZFBHL
Signification
Type of surface protection
Corrosion protection property
and application example
Zinc
Silver
Medium
Lubricated
• Zinc plating
• Iridescent passivated and sealed
• Colour: silver
• With lubricant for torque tension
adjustment
• „Medium“ corrosion protection
• For parts subject to moderate
corrosion
Zinc Nickel
Silver
High
Lubricated
• Zinc-nickel alloy plating
• Iridescent passivated and sealed
• Colour: silver
• With lubricant for torque tension
adjustment
• „High“ corrosion protection
• For exposed installation positions
Zinc Nickel
Black
High
Lubricated
• Zinc-nickel alloy plating
• Iridescent passivated and sealed
• Colour: black
• With lubricant for torque tension
adjustment
• „High“ corrosion protection
• For exposed installation positions
and visually attractive parts
Zinc Flake
Silver
High
Lubricated
• Zinc flake coating
• With organic/anorganic
top coat
• Colour: silver
• With lubricant for torque tension
adjustment
• „High“ corrosion protection
• For exposed installation positions
and/or high-strength fasteners
Zinc Flake
Black
High
Lubricated
• Zinc flake coating
• with organic/anorganic
top coat
• Colour: black
• With lubricant for torque tension
adjustment
• „High“ corrosion protection
• For exposed installation positions
and/or high-strength fasteners
5 INNOVATIVE surfAcE sysTEms
Limit values
for the coefficient of friction
(μ) according
to DIN EN ISO
16047 1)
0.09 – 0.14
Nominal
thread size
Reference coating thickness
(μm) 2)
Test according
to
DIN EN ISO
9227- NSS(h) 3)
≥ M2
min. 3
72 WR
120 RR
≥ M4
min. 5
120 WR
192 RR
≥ M10
min. 8
120 WR
264 RR
≥ M2
min. 3
120 WR
360 RR
≥ M4
min. 5
168 WR
600 RR
≥ M10
min. 8
168 WR
720 RR5)
≥ M2
min. 3
120 WR
360 RR
≥ M4
min. 5
168 WR
480 RR
≥ M10
min. 8
168 WR
720 RR5)
≥ M6
min. 5
480 RR
≥ M10
min. 8
720 RR
≥ M6
min. 5
480 RR
≥ M10
min. 8
Maximum
opeating temperature 4)
Property class
120 C°
≤ 10.9
120 C°
≤ 10.9
120 C°
≤ 10.9
200 C°
≤ 12.9
200 C°
≤ 12.9
720 RR
The friction value range is adjusted by additionally applied lubricants or lubricants integrated in sealing systems
Reference coating thicknesses: The result of the corrosion test is decisive for the assumed value
3)
WR = Coating corrosion (white rust), RR = Base metal corrosion (red rust)
4)
Up to this temperature the systems haven proven successful in practical applications
5)
To limit the testing effort the requirements are restricted to 720 h
1)
2)
INNOVATIVE surfAcE sysTEms 6
Electrolytic Metal Coatings
Zinc Plating
ZSML
Field of application:
• Suitable for applications of low or medium corrosion
• All conventional electroplated coatings can be replaced by this superior surface quality
Coating composition:
• Zinc
• Passivation (Chromium III)
• Sealing (Top coat)
Coating properties:
• Functional and decorative
• High ductility
• High cathodic corrosion protection even for coating thicknesses of 3 μm
• Thermal resistance up to 120 °C
• Uniform distribution of layers
• General coating is a „thick film passivation“
7 INNOVATIVE surfAcE sysTEms
Electrolytic Metal Coatings
Zinc Nickel Plating
ZNSHL, ZNBHL
Field of application:
• Suitable for applications of maximum corrosion
• All conventional electroplated coatings can be replaced by this superior surface quality
Coating composition:
• 85 - 90 % Zinc
• 10 - 15 % Nickel
• Sealing (Top coat)
Coating properties:
• Maximum cathodic corrosion protection
• Corrosion resistance up to 720 h against base metal corrosion (red rust)
in salt spray testing according to DIN EN ISO 9227
• Thermal resistance up to 120 °C
• Uniform distribution of layers
INNOVATIVE surfAcE sysTEms 8
Non-Electrolytic Metal Coatings
Zinc Flake Coatings
ZFSHL, ZFBHL
Field of application:
• Suitable for applications of maximum corrosion
• Suitable for high-strength components (property classes 10.9 and more)
Coating composition:
• Consisting of base coat and top coat
• The base coat (anorganic) consists of zinc and aluminium flakes
• The top coat consists of organic or anorganic layers
Coating properties:
• Corrosion resistance up to 720 h against base metal corrosion (red rust)
in salt spray testing according to DIN EN ISO 9227
• No hydrogen during the coating process
• Thermal resistance up to 200 °C
• Increased protection against contact corrosion
• Sufficient electrical conductivity for most applications
• Sufficient ductility for most applications
• Mostly resistant against vehicle operating materials
9 INNOVATIVE surfAcE sysTEms
Compatibility Table
The following table shows surface standards of different companies which are comparable to Würth Surface Systems.
Depending on the nominal thread diameter there may be slightly different corrosion resistances in the listed company
standards.
Designation
ZSML
ZNSHL
ZNBHL
ZFSHL
ZFBHL
VDA
VW
Daimler
VDA 235104.20
Ofl-c343
Ofl-c641
DBL 8451.16
VDA 235-104.
A26-27
Ofl-r645
VDA 235104.30
Ofl-r677
VDA 235104.42
TL 245
Ofl-t647
Bosch
BMW
GS 90010
ZNT
GS 90010
ZNNID SI
GS 90010
ZNNID SW
DBL 9441.55
DBL 9440.40
N67F 827
23 + 24
N67F 827 44
GS 90010
ZNS 2
ZNS 3
PN11011
26 c 1
N67F 827
33 + 34
N 600 00.0
50/ZNS SW
TRW
ZF
TS2-25-60
Class J
ZFB 865
DBL 8440.22
DBL 8440.40
VDA 235104.50
FIAT
Continental
Knorr
Bremse
ZFSHL
9.57513
RIV/EC 5 PL
RIV/EC 8 PL
ATE N 106 61
No. 1635
No. 1642
N12005, P01
.03
.04
ZFBHL
9.57513
RIV/EC 5 PL Nero
RIV/EC 8 PL Nero
ATE N 106 61
No. 1636
Designation
Porsche
ZSML
ZNSHL
ZNBHL
INNOVATIVE surfAcE sysTEms 10
INNOVATIVE
surfAcE sysTEms
With maximum corrosion resistances
Würth Industrie Service GmbH & Co. KG
Industriepark Würth, Drillberg
D-97980 Bad Mergentheim
T +49 79 31 91-0
F +49 79 31 91-4000
produktmarketing@wuerth-industrie.com
www.wuerth-industrie.com
© Würth Industrie Service GmbH & Co. KG
Printed in Germany. All rights reserved.
Responsible for the content:
Dr. Uwe Hasselmann/T
Editor:
Marius Schmitt/MP
Reproduction, in whole or in parts, only with the approval
of Würth Industrie Service GmbH & Co. KG.
MW – Y – YK – 2,5’ – 04/14
Printed on environmentally friendly paper.
We reserve the right to make product changes at any time and without
prior notice or information, if in our opinion the quality is improved by
doing this. Illustrations are examples that may differ from the delivered
goods. We reserve the right to make errors and we do not assume any
liability for misprints. Our General Terms and Conditions apply.