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Stimulation of the passivation of iron by tungstate, molybdate and chromate ions

โœ Scribed by Kotaro Ogura; Tosikazu Majima

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
409 KB
Volume
24
Category
Article
ISSN
0013-4686

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โœฆ Synopsis

Theeffectsoftungstate,molybdateandchromateions onthepassivation ofiron wereinvestigated, and these oxyanions stimulated the passivation especially at lower pH.

The results were rationalized by the dissolution-precipitation mechanism of iron passivation. In order to bring about the passivity of iron, it was required that iron first dissolves into solution, and then a ferric hydroxide or a ferric complex with oxyanion should be produced on the metal surface, which was followed by the dehydration or the condensation reaction of these compounds to form ferric oxide.

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