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Effect of Chloride Ions on the corrosion behaviour of iron-nickel alloys in sulphuric acid solutions

✍ Scribed by R. Raicheff; M. Aroyo; S. Arpadjan

Publisher
John Wiley and Sons
Year
1982
Tongue
German
Weight
402 KB
Volume
33
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

The effect of chloride ions on the corrosion behaviour of binary iron‐nickel alloys in sulphuric acid solutions has been investigated using polarization resistance and potentiodynamic polarization measurements. A moderate inhibition effect of the chloride ions on the corrosion of these alloys has been found, which depends on the pH of the medium, as well as on the composition and the structure of the alloys investigated. It has been shown that the action of the chloride ions on the partial corrosion reactions is reflected by an inhibition of the cathodic hydrogen evolution reaction and by an activation of the anodic metal dissolution reaction, the first effect being stronger. Using atomic absorption analysis it has been established that no preferentional dissolution of the alloy components in the presence and in the absence of chloride ions occurs during the corrosion of the iron‐nickel alloys.

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