This paper discusses the major types of soluble salts that affect corrosion, and their effect beneath a coating on a steel substrate. The difficulties encountered extracting and measuring the type and quantities of salts on a surface is reviewed, along with the field methods and equipment currently utilized for these purposes. Salt contamination limits established by specifiers and recommended by coating manufacturers are delineated.

Because of the lack of consensus regarding the level of soluble salts on a surface that is acceptable beneath a coating, this paper discusses two test programs currently underway that are intended to provide more information on this controversial topic.

Subject
Steel surfaces, Water, Coatings, Extraction, Contamination, Salts, Sulfates, Water immersion, Oxygen, Immersion, Soluble salts, Chlorides, Conductivity
© 2003 Association for Materials Protection and Performance (AMPP). All rights reserved. This work is protected by both domestic and international copyright laws. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2003
Association for Materials Protection and Performance (AMPP)
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