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Effect of La (40H-Cin)3 on filiform corrosion of coated steel

conference contribution
posted on 01.01.2011, 00:00 authored by Rainier Catubig, Maria ForsythMaria Forsyth, Bruce HintonBruce Hinton
The 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 - 8

Publisher

International Corrosion Council

Location

Perth, W. A.

Place of publication

[Perth, W. A.]

Start date

20/11/2011

End date

24/11/2011

Language

eng

Publication classification

E1 Full written paper - refereed

Title of proceedings

ICC 2011 : 18th International Corrosion Congress : Corrosion Control, Contributing to a Sustainable Future for All

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