The anodic dissolution of zinc and zinc alloys in alkaline solution I Oxide formation on electrogalvanized steel

被引：85

作者：

Mokaddem, M. ^{[1
]}

Volovitch, P. ^{[1
]}

Ogle, K. ^{[1
]}

机构：

[1] Ecole Natl Super Chim Paris, CNRS, UMR7045, Lab Physicochim Surfaces, F-78100 Paris, France

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 27期

关键词：

Anodic dissolution; Corrosion; Zinc; Galvanized steel; Spectroelectrochemistry; CATHODIC DELAMINATION; MATHEMATICAL-MODEL; ACTIVE DISSOLUTION; CUT EDGE; PASSIVATION; PRECIPITATION; COATINGS; ELECTROLYTE; CORROSION; BEHAVIOR;

D O I：

10.1016/j.electacta.2010.02.020

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The polarization behaviour of zinc in alkaline solution has been investigated using atomic emission spectroelectrochemistry By independently measuring the oxidation rate of zinc (electrical current) and the rate of Zn2+ dissolution (partial elemental current) It is possible to calculate the amount of insoluble zinc cations produced at any instant Assuming the insoluble cations are present as a zinc oxide film the growth of this film as a function of potential and time was determined On the basis of kinetic evidence it was found that at least three forms of zinc based oxide/hydroxide films form during polarization experiments Type I oxide formation occurs when the metal/electrolyte interface becomes locally saturated with Zn2+ ions Type II oxide forms on the metal surface underneath the film of Type I oxide but has little inhibiting effect on zinc dissolution Type III oxide is produced in much smaller quantity and results in a transition to the passive state This may be due to a potential Induced transition of Type II -> Type III oxide (C) 2010 Elsevier Ltd All rights reserved

引用

页码：7867 / 7875

页数：9

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