A simple galvanostatic test has been devised to predict susceptibility to localized corrosion of carbon steel weldments in seawater. The test was established using weldments made from eleven base metals and eight weld consumables, after shielded metal arc and submerged arc welding at different heat inputs. Simulated heat-affected zone specimens were also tested. The results corresponded well with long-term free-corrosion testing in the lab and field. As expected, higher manganese base metals had heat-affected zone corrosion, particularly at low heat input. The test also confirmed that consumables with increased Cu or Ni were more resistant to attack. This technique can be used to screen welding procedures when weld corrosion is an anticipated mode of failure.

Subject
Weld attack, Test methods, Water, Electrochemical cells, Weldments, Welding, Base metals, Anodic dissolution, Specimen preparation, Heat, Steel, Weld metal, Heat affected zone
© 1989 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).
1989
Association for Materials Protection and Performance (AMPP)
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