The stress corrosion cracking characteristics of mild steels in 20% diethanolamine solution with and without bisulfide and bicarbonate (acid gas) loadings were examined. Most evidence of SCC was found as temperature increased (up to 160°F)in solutions with low or no acid gas loading. SCC susceptibility was greatest when the electrochemical potential was controlled near the active/passive transition found on the polarization diagram. Except in solutions containing bisulfide, the oxygen content of the solution controlled the corrosion potential, and therefore, the SCC susceptibility of mild steel.

Subject
Acids, Corrosion rate, Bisulfides, Impedance, Bicarbonates, Refineries, Mechanical failure, Steel, Risk reduction, Electrodes, Corrosion potential, Stress corrosion cracking, Electrode potential
© 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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