Table of Contents

Abstract

Specifies a method for testing dissimilar metal couples immersed under standard conditions in seawater and for the determination of ratings for the additional corrosion which may occur on the more anodic metal for each couple. In addition, ratings are given for 245 commercially-significant dissimilar metal couples.
RECONFIRMATION NOTICE
Technical Committee MT-014 has reviewed the content of this publication and in accordance with Standards Australia procedures for reconfirmation, it has been determined that the publication is still valid and does not require change.
Certain documents referenced in the publication may have been amended since the original date of publication. Users are advised to ensure that they are using the latest versions of such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for reconfirmation on 14 July 2016.
The following are represented on Technical Committee MT-014:
Australasian Corrosion Association
Australasian Corrosion Association, NZ Branch
Australian Chamber of Commerce and Industry
Australian Electrolysis Committee
Australian Industry Group
Australian Paint Manufacturers' Federation
Australian Pipelines and Gas Association
AUSTROADS
Bureau of Steel Manufacturers of Australia
CSIRO
Galvanizers Association of Australia
Galvanizing Association of New Zealand
Materials Australia
New Zealand Abrasive Blasting Association
New Zealand Heavy Engineering Research Association
United Water International
Water Services Association of Australia

Scope

This Standard specifies a test method to determine the degree of additional corrosion of the more anodic of two metals in direct electrical contact, when immersed under standard conditions in stagnant artificial seawater.
NOTES:
1 The factors controlling galvanic corrosion given in Section 3 should be taken into account when evaluating the test results in terms of expected performance in actual seawater conditions and may reduce the viability of some galvanic couple ratings given in Table B1.
2 The basic theory of the galvanic corrosion of dissimilar metals is given in Appendix C
The test method given in Appendix A requires the measurement of the galvanic current over a period of 28 days, and rates the amount of additional corrosion of the metal under consideration into four categories.
The Standard provides ratings for a variety of commercially-significant dissimilar metal couples (including alloys and carbon).
NOTE: Table B1 may be used to give a qualitative assessment of the performance of dissimilar metal couples when they are immersed in actual seawater.
The Standard also provides information on factors influencing galvanic corrosion and in addition, provides guidelines on controlling this corrosion.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Reconfirmed 29/07/2016. This standard has been reconfirmed in Australia in 2016 and remains current in New Zealand. Reconfirmation Notice 29/07/2016
Pages
ISBN
Committee	MT-014
Supersedes	DR 06130 AS 4036-1992