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Effect of halide ions on the nucleation of corrosion pits in iron

✍ Scribed by Dr. Maria Janik-Czachor

Publisher
John Wiley and Sons
Year
1979
Tongue
German
Weight
307 KB
Volume
30
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

The kinetics of the pit nucleation in iron in borate buffer solution containing bromides and iodides (0.01 n–0.5 n) has been investigated, and the results have been compared with those obtained for chloride solutions. It has been found that the critical pitting potential, E~cp~, decreases linearly with the logarithm of the halide concentration. At constant potential, E, the logarithm of the induction period of pit nucleation decreases linearly with the reciprocal of the potential difference Ξ”E = E‐E~cp~. The mechanism of the aggressive action of the halide ions on the passive film is discussed.

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