XPS characterization of passive films formed on mild steels in bicarbonate medium

被引：2

作者：

Alves, VA

Brett, CMA

Montemor, MD

机构：

[1] Fac Fed Integradas Diamantina, Dept Farm Bioquim, BR-39100000 Diamantina, MG, Brazil

[2] Univ Coimbra, Dept Quim, P-3004535 Coimbra, Portugal

[3] Inst Super Tecn, Dept Engn Quim, Lisbon, Portugal

来源：

QUIMICA NOVA | 2005年 / 28卷 / 02期

关键词：

passive film; steel; XPS;

D O I：

10.1590/S0100-40422005000200007

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

XPS CHARACTERIZATION OF PASSIVE FILMS FORMED ON MILD STEELS IN BICARBONATE MEDIUM. Passive films formed in bicarbonate solutions on carbon steel, chromium steel and high speed steel have been characterized by XPS. The passive films formed on chromium and high speed steels showed superior protective properties than those formed on carbon steel. It was confirmed by XPS that the steel composition influences the passive film composition. Chromium oxide and hydroxide, as well as molybdenum and tungsten oxides and hydroxides are present in the passive film of chromium steel and high speed steel, respectively, besides iron oxide and hydroxide. The more complex composition of the oxide film on high speed steel explains its electrochemical behaviour and highest corrosion resistance.

引用

页码：204 / 210

页数：7

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