This paper deals with study on hydrogen diffusion and permeation in two pipeline steel materials. Some criticisms on the electrochemical hydrogen permeation technique were discussed in this article deals mainly with trapping effect on diffusion of hydrogen with steel. The effects of some metallurgical features such as microstructure were evaluated studying hydrogen diffusion on the same materials in as received condition, fully quenched and annealed conditions. Results were compared with steel pipeline not specifically produced for sour service. Lattice diffusion coefficient of hydrogen was estimated with simple increase and decrease of cathodic charging current (partial transient).

Subject
Coatings, Materials, Hydrogen permeation, Microstructure, Diffusion, Activation energy, Desorption, Permeation current, Permeation, Constants, Steel, Hydrogen, Inclusions
Keywords:
Pipeline steels, Electrochemical charging, Hydrogen diffusion, Hydrogen trapping, Hydrogen embrittlement
© 2013 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).
2013
Association for Materials Protection and Performance (AMPP)
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