Abstract
In many cases, the seam of welded carbon steel piping corrodes preferentially to the base metal. There are many factors which contribute to the situation, including residual stresses and chemical composition, which may result in a welded region which is anodic to the adjacent base metal. One factor which can accelerate corrosion at weld seams is the presence of deposits over the seam. Where such deposits result in under-deposit corrosion, the weld seam can experience corrosion in the center of the seam, resulting in failure. However, this is not universally the case, and it is difficult to predict the likelihood or extent of corrosion at weld seams. Steps can be taken to reduce the likelihood of this form of corrosion.
Subject
Seams,
Water,
Piping,
Iron oxide,
Tubes,
Welding,
Magnification,
Carbon steel pipes,
Mechanical failure,
Weld seams,
Metals,
Steel,
Deposit corrosion
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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