The formation of hydrides and their propagation into the matrix for grade 2 titanium in 3.5%NaCl solution were examined in this paper. The critical potential for hydride formation increased with decreasing pH and increasing temperature. The pH had a more significant effect than the temperature. A surface film could significantly lower the critical potential for hydride formation. The hydride formation was controlled by the critical current density, which was constant for one material, regardless of environmental conditions. The applied stress did not change the critical potential under the testing conditions used in this study. The microstructure of the hydride and its growth also strongly depended on pH.

Subject
X-ray diffraction, Water, Materials, Tubes, Free corrosion potential, Hydrides, Current densities, Electric potential, Titanium, Surface profile, Electrochemical potential, Corrosion potential, Hydrogen
Keywords:
titanium, polarization, XRD, hydrogen absorption, hydrides
© 1999 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).
1999
Association for Materials Protection and Performance (AMPP)
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