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Effects of corrosion inhibiting pigment lanthanum 4-hydroxy cinnamate on the filiform corrosion of coated steel

Catubig, Rainier, Seter, Marianne, Neil, Wayne, Forsyth, Maria and Hinton, Bruce 2011, Effects of corrosion inhibiting pigment lanthanum 4-hydroxy cinnamate on the filiform corrosion of coated steel, Journal of the electrochemical society, vol. 158, no. 11, pp. C353-C358.

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Title Effects of corrosion inhibiting pigment lanthanum 4-hydroxy cinnamate on the filiform corrosion of coated steel
Author(s) Catubig, Rainier
Seter, Marianne
Neil, Wayne
Forsyth, Maria
Hinton, Bruce
Journal name Journal of the electrochemical society
Volume number 158
Issue number 11
Start page C353
End page C358
Total pages 6
Publisher Electrochemical Society
Place of publication New York, N.Y.
Publication date 2011
ISSN 0013-4651
1945-7111
Summary Corrosion protection by lanthanum hydroxy cinnamate (La(4OH-cin)3) in a polyurethane based varnish coating for mild steelhas been investigated. Filiform scribe tests, energy-dispersive X-ray spectroscopy (EDXS) and potentiodynamic polarisation (PP)techniques have been powerful tools to better understand the corrosion process at defects and under the coating. Filiform scribetests showed that La(4OH-cin)3, as a pigment in a coating, inhibited the initiation and propagation of both delamination and filiformcorrosion (FFC) on coated steel. The PP experiments provided an insight into the fundamental mechanism of FFC. The resultssuggest that La(4OH-cin)3 behaves as a mixed inhibitor and stifles the initiation and propagation of FFC. In this paper, the theory ofdelamination leading to FFC and the likely mechanism of inhibition by the La(4OH-cin)3 will be discussed.
Language eng
Field of Research 090403 Chemical Engineering Design
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2011, The Electrochemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30044357

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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