Influence of praseodymium - synergistic corrosion inhibition in mixed rare-earth diphenyl phosphate systems

Markley, T. A., Hughes, A. E., Ang, T. C., Deacon, G. B., Junk, P. and Forsyth, M. 2007, Influence of praseodymium - synergistic corrosion inhibition in mixed rare-earth diphenyl phosphate systems, Electrochemical and solid-state letters, vol. 10, no. 12, pp. C72-C75.


Title Influence of praseodymium - synergistic corrosion inhibition in mixed rare-earth diphenyl phosphate systems
Author(s) Markley, T. A.
Hughes, A. E.
Ang, T. C.
Deacon, G. B.
Junk, P.
Forsyth, M.
Journal name Electrochemical and solid-state letters
Volume number 10
Issue number 12
Start page C72
End page C75
Publisher Electrochemical Society
Place of publication Pennington, N. J.
Publication date 2007
ISSN 1099-0062
1944-8775
Keyword(s) cerium compounds
corrosion inhibitors
organic compounds
pH
praseodymium compounds
precipitation
Raman spectra
Summary Mixed rare-earth organophosphates have been investigated as potential corrosion inhibitors for AA2024-T3, and previously have shown synergistic inhibition behavior; however, the mechanism was not identified. In this paper, a key factor contributing to corrosion inhibition of AA2024-T3 with mischmetal diphenyl phosphate [Mm(dpp)3] is the unique stability of Pr(dpp)3 compared to other key rare earths in mischmetal. Although increasing pH causes precipitation of other components, the Pr compound is stable at higher pH. Electrochemically, a synergy is evident when Ce(dpp)3 and Pr(dpp)3 are combined. Raman mapping indicates the Pr(dpp)3 inhibitor leads to a more uniform coverage of the alloy.
Language eng
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 ©2007, Electrochemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030213

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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