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Corrosion protection of AA2024-T3 using rare earth diphenyl phosphates
journal contribution
posted on 2007-03-10, 00:00 authored by T Markley, Maria ForsythMaria Forsyth, A HughesExisting corrosion protection technologies for aluminium alloys utilising chromates are environmentally damaging and extremely toxic. This paper presents a preliminary investigation into rare earth diphenyl phosphates as new environmentally benign corrosion inhibitors. Full immersion weight loss experiments, cyclic potentiodynamic polarisation measurements and Raman spectroscopy were used in this study. Results show cerium diphenyl phosphate (Ce(dpp)3) acts as a cathodic inhibitor, decreasing cathodic current density and Ecorr by passivating cathodic intermetallic particles on the alloy surface. Mischmetal diphenyl phosphate (Mm(dpp)3) acts a mixed inhibitor, shifting Ecorr to more noble values, decreasing cathodic current density, increasing the breakdown potential and suppressing pitting.
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Journal
Electrochimica actaVolume
52Issue
12Pagination
4024 - 4031Publisher
Elsevier Science Pub. Co.Location
New York, N.Y.Publisher DOI
ISSN
0013-4686eISSN
1873-3859Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2006, Elsevier Ltd.Usage metrics
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