Currents flowing between the electrically separated equipotential sections of segmented tubular crevices showed complex behavior at 288°C and during cooling. Dependence of these currents on electrolyte, concentration of dissolved oxygen, and accessible surface area external to the occluded region indicated cathodic rate control, and demonstrated an important contribution from cathodic reaction partitioning among the segments. The detection of molecular hydrogen after its formation by aqueous corrosion and passage through the walls of stainless steel tubing supported indirect kinetic evidence for H+/H2 cell activity within the crevices.

Subject
External surfaces, Water, Diffusion, Autoclaves, Cathodic current, Sodium chloride, Crevices, Electrochemical current, Tubing, Anodic current, Oxygen, Electrolytes, Hydrogen
© 1987 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).
1987
Association for Materials Protection and Performance (AMPP)
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