This paper summarizes the results of a research study in which the localized corrosion of two corrosion-resistant alloys (CRAs) were evaluated. The two alloys investigated (Alloy UNS N08825 and Alloy UNS N06975) were found to be susceptible to localized corrosion in sulfur-chloride-containing environments. It is believed that for localized corrosion of CRAs to occur, sulfur must be in direct contact with the metal. In addition to elemental sulfur and chlorides, the effects of several other variables on localized corrosion were also investigated. The susceptibility to localized corrosion of these CRAs increases with increases in temperature, oxygen, chloride, and sulfur, and with a decrease in the pH of the test solution.

The results of this research correlate well with the observed performance of these two CRA materials in a water disposal well. A model for the localized corrosion of CRAs in a sulfur-chloride-containing solution is described in this paper.

Subject
Sulfur, Water, Materials, Corrosion resistant alloys, Molybdenum alloys, Sodium chloride, Corrosion attacks, Sodium chloride solution, Pitting, Elemental sulfur, Localized corrosion, Alloys, Chlorides
Keywords:
corrosion, pitting, crevice corrosion, sulfur, CRAs, water disposal well
© 1990 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).
1990
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.