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Effect of La (40H-Cin)3 on filiform corrosion of coated steel
conference contribution
posted on 2011-01-01, 00:00 authored by Rainier Catubig, Maria ForsythMaria Forsyth, Bruce HintonBruce HintonThe potential of lanthanum 4-hydroxy cinnamate to inhibit filiform corrosion on coated mild steel (AS1020) was investigated. The effectiveness and behaviour of this rare-earth inhibitor was examined with filiform corrosion scribe tests and Potentiodynamic Polarisation. The filiform scribe tests showed that lanthanum 4-hydroxy cinnamate, as a pigment in a coating, inhibited the initiation and propagation of both delamination and filiform corrosion on coated steel. The polarisation tests demonstrated that at pH 3, no significant inhibition was observed but a secondary passivation effect was present. At pH 9, inhibition on coated steel was found to be greater than that of the inhibition found at pH 6. The models of filament initiation and growth proposed by previous authors are also discussed.
History
Event
International Corrosion Congress (18th : 2011 : Perth, W. A.)Pagination
1 - 8Publisher
International Corrosion CouncilLocation
Perth, W. A.Place of publication
[Perth, W. A.]Start date
2011-11-20End date
2011-11-24Language
engPublication classification
E1 Full written paper - refereedTitle of proceedings
ICC 2011 : 18th International Corrosion Congress : Corrosion Control, Contributing to a Sustainable Future for AllUsage metrics
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