PASSIVITY OF METALS IN CONCENTRATED AND ANHYDROUS SOLUTIONS OF SULFURIC-ACID

被引：16
|
作者：
BANAS, J
MAZURKIEWICZ, B
STYPULA, B
机构：
[1] Academy of Mining and Metallurgy, Institut of Foundry Engineering, Kraków
来源：
ELECTROCHIMICA ACTA | 1992年 / 37卷 / 06期
关键词：
PASSIVATION; PASSIVITY; ELECTROLYTIC POLARIZATION; OXIDATION; ANODIC FILM;
D O I：
10.1016/0013-4686(92)85224-9
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Passivity of iron, nickel and chromium has been investigated in anhydrous and concentrated solutions of sulphuric acid. The oxide-hydroxide film can be formed on the metal surface only in solutions with the molar ratio of acid to water lower than 1:4. In concentrated and anhydrous environments passivation proceeds with participation of undissociated acid molecules, which can become a source of oxygen necessary to oxide formation, and a thick oxide-salt layer is formed on the metal surface.
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页码：1069 / 1073
页数：5
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