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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.

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.

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 if you wish to suggest changes to the content of this unit standard.

Ó New Zealand Qualifications Authority 2010