Corrosion protection of AA2024-T3 using rare earth diphenyl phosphates

Markley, Tracey A., Forsyth, Maria and Hughes, Anthony E. 2007, Corrosion protection of AA2024-T3 using rare earth diphenyl phosphates, Electrochimica acta, vol. 52, no. 12, pp. 4024-4031, doi: 10.1016/j.electacta.2006.11.028.

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Title Corrosion protection of AA2024-T3 using rare earth diphenyl phosphates
Author(s) Markley, Tracey A.
Forsyth, MariaORCID iD for Forsyth, Maria
Hughes, Anthony E.
Journal name Electrochimica acta
Volume number 52
Issue number 12
Start page 4024
End page 4031
Publisher Elsevier Science Pub. Co.
Place of publication New York, N.Y.
Publication date 2007-03-10
ISSN 0013-4686
Keyword(s) AA2024 alloy
rare earth inhibitors
corrosion inhibition
diphenyl phosphate
raman spectroscopy
Summary Existing 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.
Language eng
DOI 10.1016/j.electacta.2006.11.028
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2006, Elsevier Ltd.
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