Inhibiting the corrosion of stainless steel in phosphoric acid

被引：0
|
作者：
E. V. Filimonov
A. I. Shcherbakov
机构：
[1] Russian Academy of Sciences,Institute of Physical Chemistry
来源：
Protection of Metals | 2000年 / 36卷
关键词：
Corrosion Rate; Phosphoric Acid; Anodic Dissolution; Passive State; Anodic Polarization Curve;
D O I：
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中图分类号：
学科分类号：
摘要：
The effect of Cu2+ and NO3− ions on the stability of the passive state of a X18H10T type steel in phosphoric acid is investigated by constructing true curves of the anodic and cathodic processes. In a 3 M H3PO4 at 100°C, the steel is found to be in an unstable passive state. Copper(II)- and nitrate-ions transfer it into a steady passive state. Adding copper (II) ions to phosphoric acid accelerates the cathodic process and impedes the anodic dissolution in the active potential range. The steel passivation potential decreases under their action.
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页码：296 / 298
页数：2
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