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Influence of sulphite on the passivation of iron

✍ Scribed by E. Kuzmann; M.L. Varsányi; A. Vértes; W. Meisel

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
232 KB
Volume
36
Category
Article
ISSN
0013-4686

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✦ Synopsis

Miissbauer spectroscopy and electrochemical measurements were used to study the passivation of iron and steels in a sulphite containing solution. The potentiodynamic curves show that passivation occurs at -140 mV potential us saturated calomel electrode (see). The main phase of the passive layer was found to be y-FeOOH, while FeSO, . H,O on the surface and FeSO, .3H,O inside the layer were identified as minor phases in the case of polarization in a solution of pH 3.37. Only y-FeOOH was observed on the surface of samples polarized at pH 6.6.

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