Corrosion effects which characterize carbon dioxide corrosion of ferrous alloys in wells, pipelines, and gas treating plants are reviewed in the light of currently proposed corrosion mechanisms. Modifications to current theories are suggested. The effect of velocity in promoting corrosion should include the local velocity effects associated with the evolution on the metal surface of carbon dioxide gas resulting from temperature or pressure changes. It is proposed that mesa type attack results from the gas evolution effect plus metallurgical anisotropies which result in accelerated corrosion in planes parallel to the surface. Corrosion in amine solutions of carbon dioxide as encountered in natural gas treating is attributed to undissociated carbonic acid formed by thermal decomposition of bicarbonate ion.

Subject
Ions, Corrosion rate, Metal surfaces, Gas pressure, Corrosion evolution, Corrosion reactions, Corrosion attacks, Amines, Steel, Carbon dioxide, Sulfides, Corrosion mechanisms, Inclusions
© 1984 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).
1984
Association for Materials Protection and Performance (AMPP)
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