26108 version 1
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Explain the prevention of fouling and corrosion in saltwater pipework
on vessels
Level
5
Credits
4
Purpose
People credited with this unit standard are able to explain saltwater pipework
biofouling and prevention on vessels and corrosion considerations and
prevention.
Subfield
Boating Industries
Domain
Boatbuilding
Status
Registered
Status date
21 May 2010
Date version published
21 May 2010
Planned review date
31 December 2014
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Boating Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0136
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Definitions
Corrosion – electrochemical action produced by dissimilar metals in contact with
each other and an electrolyte; that produces a flow of electrons and an associated
current flow.
Job requirements – requirements that may or may not be specified but require
correct choices to achieve including: following safety and company procedures and
meeting generally accepted trade practice standards.
2
Relevant reference standards
ABYC E-2 – Cathodic Protection
This standard is a guide for the design, installation, and use of cathodic protection
systems on boats. This standard applies to the use of galvanic anodes and
impressed current systems if installed on a boat.
 New Zealand Qualifications Authority 2016
26108 version 1
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Elements and performance criteria
Element 1
Explain saltwater pipework biofouling and prevention on vessels.
Performance criteria
1.1
Micro and macro biofouling are identified in terms of biological type. Examples
of fouling on saltwater pipework in vessels are given.
1.2
Impressed current antifouling systems are explained in terms of the principles
involved.
1.3
Anode placement options are identified and explained in terms of protection and
access advantages and disadvantages.
1.4
Anode material selection is explained in terms of electrolytic principles for
different pipework materials.
Element 2
Explain saltwater pipework corrosion considerations and prevention.
Performance criteria
2.1
Pipework corrosion is explained in terms of metal used for the pipework system.
2.2
The effectiveness of impressed current for preventing corrosion is explained
and compared to its fouling prevention effectiveness.
2.3
Corrosion prevention and minimisation practices for pipework are described in
accordance with job requirements.
Range
includes but is not limited to – metal selection, anodic protection.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
 New Zealand Qualifications Authority 2016
26108 version 1
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Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Boating Industry Training Organisation training@bia.org.nz if you wish
to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016