Open AccessMonitoring of Hydrogen Absorption into Titanium Using Resistometry
Author(s) -
Kazuhisa Azumi,
Yoshihide Asada,
Tomohiro Ueno,
Masahiro Seo,
Tadahiko Mizuno
Publication year - 2002
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1.1498257
Subject(s) - hydride , polarization (electrochemistry) , hydrogen , electrochemistry , materials science , titanium , electrode , titanium hydride , oxide , penetration (warfare) , anode , cathodic protection , analytical chemistry (journal) , surface layer , composite material , layer (electronics) , inorganic chemistry , metallurgy , chemistry , metal , organic chemistry , operations research , engineering
Hydrogen absorption into Ti electrodes during electrochemical cathodic polarization was monitored using resistometry. Electric resistance of Ti increased with H absorption due to growth of a hydride layer from the surface toward the inside. The growth rate of the hydride layer was estimated from resistance data and was found to depend on the polarization current density, existence of a preformed anodic oxide film, and shape of the specimen. For example, preformation of an anodic oxide film at a potential higher than the breakdown potential, rather, promotes hydrogen penetration. In the case of a thin wire electrode, the hydride layer grew in a nonuniform manner because the volume expansion induced cracking on the surface. Therefore, the average thickness of the hydride layer was estimated from the change in resistance. ©2002 The Electrochemical Society. All rights reserved
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