The relationship between a vacuum loss based field method and a conventional electrochemical technique for measuring hydrogen permeation through metals, has been established by theoretical modeling and laboratory experimentation on thick wall pipes. The electrochemical technique used in this work tends to be more accurate for detecting small hydrogen fluxes in the laboratory but may be more difficult to apply in the field than the vacuum based method. Comparison of the two techniques showed that both give the same transient response as the length of capillary tubing is reduced in the vacuum device.

Subject
Atomic hydrogen, Hydrogen permeation, Piping, Corrosion rate, Probes, Internal pressure, Diffusion, Walls, Permeation current, Hydrogen flux, Constants, Tubing, Hydrogen
Keywords:
Corrosion, hydrogen permeation, sensor, circuital modeling discretization, vacuum hydrogen probe
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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