Electrochemical behaviour of a tin electrode in tartaric acid solutions

被引：19

作者：

Abd El Rehim, Sayed S.

Zaky, Ayman A. ^{[1
]}

Mohamed, Noble F.

机构：

[1] S Valley Univ, Fac Sci, Dept Chem, Qena 83523, Egypt

[2] Ain Shams Univ, Fac Sci, Dept Chem, Cairo, Egypt

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 424卷 / 1-2期

关键词：

tin corrosion; tartaric acid; potentiodynamic and galvanostatic techniques;

D O I：

10.1016/j.jallcom.2005.12.080

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrochemical behaviour of tin in tartaric acid solutions was investigated using potentiodynamic and galvanostatic techniques. The E/I curves showed that the anodic behaviour of tin exhibits active/passive transition. In the active dissolution potential region, tin dissolves as Sn(II) species, which are subsequently oxidized to Sn(IV). The active dissolution of tin increases with increasing tartaric acid concentration, sweep rate and temperature. Passivation is due to formation of Sn(OH)(4) and/or SnO2 film on the anode surface. The dissolution process is controlled by diffusion. The Elt curves displayed that the time needed to active passive transition increases with increasing acid concentration and temperature but decreases with increasing imposing anodic current density. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：88 / 92

页数：5

共 27 条

[1] Anodic behaviour of tin in maleic acid solution and the effect of some inorganic inhibitors [J].