Cathodic polarization of Al-Sn alloy in sodium chloride solution

被引：58

作者：

Kliskic, M ^{[1
]}

Radosevic, J ^{[1
]}

Gudic, S ^{[1
]}

Smith, M ^{[1
]}

机构：

[1] Fac Technol, Dept Electrochem & mat Protect, Split 21000, Croatia

来源：

ELECTROCHIMICA ACTA | 1998年 / 43卷 / 21-22期

关键词：

high purity aluminium; Al-Sn alloy; cathodic polarization;

D O I：

10.1016/S0013-4686(98)00001-2

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The results presented in this paper were obtained with two Al-Sn binary alloys (0.02 and 0.4 wt% Sn) which had been prepared on super pure (99.999%) Al base. A study of behaviour of these alloys at cathodic polarization in 2 M NaCl solution by means of electrochemical methods complemented by SEM and EDAX analysis provided an insight into the effect of addition of tin on the electrochemical behaviour of aluminium. It has been observed that a low tin content causes aluminium to behave hyperactively at high negative potential values, which leads to crevice formation and conditions favourable for further dissolution. The result of the change of potential in the negative direction with the alloy containing 0.4 wt% tin is superactivation of aluminium as consequence of de-filming processes. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：3241 / 3255

页数：15

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