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Corrosion inhibition of 7000 series aluminium alloys with cerium diphenyl phosphate
journal contribution
posted on 2011-02-03, 00:00 authored by J A Hill, T Markley, Maria ForsythMaria Forsyth, Patrick HowlettPatrick Howlett, Bruce HintonBruce HintonCerium diphenyl phosphate (Ce(dpp)3) has previously been shown to be a strong corrosion inhibitor for aluminium-copper magnesium alloy AA2024-T3 and AA7075 in chloride solutions. Surface characterisation including SEM and ToF-SIMS coupled with electrochemical impedance spectroscopy (EIS) measurements are used to propose a mechanism of corrosion inhibition which appears to involve the formation of a complex oxide film of aluminium and cerium also incorporating the organophosphate component. The formation of a thin complex film consisting of hydrolysis products of the Ce(dpp)3 compound and aluminium oxide is proposed to lead to the observed inhibition. SEM analysis shows that some intermetallics favour the creation of thicker deposits predominantly containing cerium oxide compounds.
History
Journal
Journal of alloys and compoundsVolume
509Issue
5Pagination
1683 - 1690Publisher
Elsevier BVLocation
Amsterdam, The NetherlandsISSN
0925-8388eISSN
1873-4669Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2010, Elsevier B.V.Usage metrics
Keywords
aluminium alloysceriumcorrosioncorrosion inhibitorsdiphenylphosphatescanning electron microscopysurface characterisation metals and alloyssurfaces and interfacesScience & TechnologyPhysical SciencesTechnologyChemistry, PhysicalMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringChemistryMaterials ScienceCONVERSION COATINGSAA2024-T3PROTECTIONSTEELOXIDECondensed Matter Physics
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