The mechanism of electropolishing of titanium in methanol-sulfuric acid electrolytes

被引：94

作者：

Piotrowski, O ^{[1
]}

Madore, C ^{[1
]}

Landolt, D ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Dept Mat, Lab Met Chim, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1998年 / 145卷 / 07期

关键词：

D O I：

10.1149/1.1838644

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The mechanism of electropolishing of titanium in methanol-sulfuric acid electrolytes is studied by steady-state measurements and by ac-impedance spectroscopy using a rotating disk electrode. The effect of applied potential, electrode rotation rate, temperature, and electrolyte composition on the response of the system is investigated at the mass-transport-limited current plateau. Both steady-state measurements and impedance data suggest that the rate of reaction is controlled by mass transport of tetravalent titanium species from the anode surface to the bulk electrolyte. The impedance data confirm the presence of a compact film at the anode surface during titanium dissolution at the limiting current.

引用

页码：2362 / 2369

页数：8

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