Dissolution of Ti wires in sulphuric acid and hydrochloric acid solutions

被引：13

作者：

Azumi, Kazuhisa ^{[1
]}

Nakajima, Miho ^{[1
]}

Okamoto, Kosuke ^{[1
]}

Seo, Masahiro ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan

来源：

CORROSION SCIENCE | 2007年 / 49卷 / 02期

关键词：

titanium; SEM; passivity; hydrogen absorption;

D O I：

10.1016/j.corsci.2006.04.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ti wire electrodes were immersed in acidic solutions containing H2SO4 and HCl of various concentrations at 353 K to evaluate corrosion rate by measurement of electric resistance change (resistometry). Addition of hydrochloric acid to sulphuric acid solution promoted depassivation of Ti. After depassivation, the immersion potential dropped to the hydrogen evolution potential and a hydride layer was formed on the surface. The hydride layer dissolved continuously in the acidic solution. SEM observation showed that Ti wires dissolved almost uniformly in the early stage and that the dissolution then trace became irregular due to nonuniform growth of the hydride layer. Dissolution rate of a Ti wire was estimated almost accurately by resistometry. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：469 / 480

页数：12

共 22 条

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