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New 'green' corrosion inhibitors based on rare earth compounds
journal contribution
posted on 2011-01-01, 00:00 authored by Maria ForsythMaria Forsyth, Marianne Seter, Bruce HintonBruce Hinton, G Deacon, P JunkA series of rare earth organic compounds pioneered by our group have been shown to provide a viable alternative to theuse of chromates as corrosion inhibitors for some steel and aluminium applications. For example we have shown thatthe lanthanum 4-hydroxy cinnamate offers excellent corrosion mitigation for mild steel in aqueous environments whilerare earth diphenyl phosphates offer the best protection in the case of aluminium alloys. In both cases the protectionappears to be related to the formation of a nanometre thick interphase occurring on the surface that reduces theelectrochemical processes leading to metal loss or pitting. Very recent work has indicated that we may even be able toaddress the challenging issue of stress corrosion cracking of high strength steels. Furthermore, filiform corrosion can besuppressed when selected rare earth inhibitor compounds are added as pigments to a polymer coating. There is little doubtfrom the work thus far that a synergy exists between the rare earth and organic inhibitor components in these novelcompounds. This paper reviews some of the published research conducted by the senior author and colleagues over the past10 years in this developing field of green corrosion inhibitors
History
Journal
Australian journal of chemistryVolume
64Issue
6Pagination
812 - 819Publisher
CSIROLocation
Collingwood, VIC.ISSN
0004-9425eISSN
1445-0038Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2011, CSIROUsage metrics
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