The Westernport plant has had an intermittent corrosion problem on uncoated temper-rolled steel for some years. This problem was distinctive in terms of its apparently random occurrence, the small proportion of product affected, corrosion pattern, and distribution on the steel strip surface. A logical problem-solving process was used to define the causes of the corrosion problem. The hypothesis that corrosion was caused by a combination of bacterial action, and entrapped moisture derived from nitrite-based inhibitor solution, has been verified by laboratory and field tests. Addition of a triazine-type biocide to inhibitor has been effective to date in preventing corrosion.

Subject
Coils, Steel surfaces, Water, Inhibitor performance, Rolling, Corrosion products, Chemical inhibition, Defects, Bacteria, Corrosion inhibitors, Steel, Biocides, Drying
© 1986 Association for Materials Protection and Performance (AMPP). All rights reserved. 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).
1986
Association for Materials Protection and Performance (AMPP)
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