Study of passivation of Al and Al-Sn alloys in borate buffer solutions using electrochemical impedance spectroscopy

被引：103

作者：

Gudic, S ^{[1
]}

Radosevic, J ^{[1
]}

Kliskic, M ^{[1
]}

机构：

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

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 18期

关键词：

aluminium; Al-Sn alloy; electrochemical impedance spectroscopy; oxide film; passivation;

D O I：

10.1016/S0013-4686(02)00246-3

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Properties of thin oxide films on Al and Al-Sn alloys (with Sri content of 0.02, 0.09, 0.20 and 0.40 wt.%) formed either naturally or anodically in borate buffer solutions were investigated by means of electrochemical impedance spectroscopy. Equivalent circuits have been proposed that completely illustrate the Al(Al-Sn alloy)/oxide film/electrolyte systems examined, and properties of oxide films were determined. The stability (thickness and resistance) of oxide films has been found to increase with increased Sri content in the alloy, with increased passivation potential, and with longer time of anodising. The increase in temperature of anodising significantly reduces impedance in systems observed. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：3009 / 3016

页数：8

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