Corrosion inhibition of 7000 series aluminium alloys with cerium diphenyl phosphate

Hill, Julie-Anne, Markley, Tracey, Forsyth, Maria, Howlett, Parick C. and Hinton, Bruce R. W. 2011, Corrosion inhibition of 7000 series aluminium alloys with cerium diphenyl phosphate, Journal of alloys and compounds, vol. 509, no. 5, pp. 1683-1690.

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Title Corrosion inhibition of 7000 series aluminium alloys with cerium diphenyl phosphate
Author(s) Hill, Julie-Anne
Markley, Tracey
Forsyth, MariaORCID iD for Forsyth, Maria
Howlett, Parick C.ORCID iD for Howlett, Parick C.
Hinton, Bruce R. W.ORCID iD for Hinton, Bruce R. W.
Journal name Journal of alloys and compounds
Volume number 509
Issue number 5
Start page 1683
End page 1690
Total pages 8
Publisher Elsevier BV
Place of publication Amsterdam, The Netherlands
Publication date 2011-02-03
ISSN 0925-8388
Keyword(s) aluminium alloys
corrosion inhibitors
scanning electron microscopy
surface characterisation metals and alloys
surfaces and interfaces
Summary Cerium 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.
Language eng
Field of Research 091207 Metals and Alloy Materials
091205 Functional Materials
Socio Economic Objective 870302 Metals (e.g. Composites, Coatings, Bonding)
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, Elsevier B.V.
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