Current oscillations in potentiostatic electro-oxidation of aluminum in phosphoric and sulfuric acids

被引：10

作者：

Bowlin, DT

Scheeline, A

Pearlstein, AJ

机构：

[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA

来源：

ELECTROCHIMICA ACTA | 1998年 / 43卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

anodic films; aluminum electro-oxidation; Al; 2024; electrochemical oscillations; ammonium peroxydisulfate;

D O I：

10.1016/S0013-4686(97)00059-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Potentiostatic current oscillations occur in electro-oxidation of aluminum alloy 2024 by ammonium peroxydisulfate in phosphoric acid, for which we find nearly periodic behavior at 60 degrees C, and cyclic bursting at 68 degrees C. We also show that potentiostatic current oscillations occur in electro-oxidation of the same alloy by sodium dichromate in sulfuric acid. The results are discussed in terms of the separate roles of the oxidant and acid in oxidation of the alloy and dissolution of the film, respectively, and the apparent requirement that oscillatory electro-oxidation of aluminum requires a balance between oxidant strength and acid strength.

引用

页码：417 / 421

页数：5

共 24 条

[1]

[Anonymous], 1993, Handbook of aluminum bonding technology and data

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