Electrochemical passivation behaviour of nanocrystalline Fe80Si20 coating in borate buffer solution

G, Gupta and Moon, A.P. and Mondal, K. (2013) Electrochemical passivation behaviour of nanocrystalline Fe80Si20 coating in borate buffer solution. Bulletin of Materials Science, 36. pp. 51-58. ISSN 0250-4707

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Abstract

Passivation behaviour of nanocrystalline coating (Fe80Si20) obtained by in situ mechanical alloying route is studied and compared with that of the commercial pure iron and cast Fe80Si20 in sodium borate buffer solution at two different pH values (7·7 and 8·4). The coating reveals single passivation at a pH of 7·7 and double stage passivity at a pH of 8·4. The first passive layer is due to the dissolution mechanism and second passivity is related to stable passivation. The cast sample shows single stage passivity in the solution of pH 8·4. The difference in the passivation behaviour for the cast alloy (Fe80Si20) and the coating is related to the presence of highly iron-enriched localized regions, formed during the processing stage of coating.

Item Type:
Journal Article
Journal or Publication Title:
Bulletin of Materials Science
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500
Subjects:
ID Code:
146453
Deposited By:
Deposited On:
10 Aug 2020 15:20
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Aug 2020 10:30