Corrosion protection afforded by praseodymium conversion film on Mg alloy AZNd in simulated biological fluid studied by scanning electrochemical microscopy

Authors

Seyed S. Jamali, University of WollongongFollow
Simon E. Moulton, University of WollongongFollow
Dennis E. Tallman, North Dakota State University
Maria Forsyth, Monash University, Deakin University
Jan Weber, Boston Scientific
Azadehsadat Mirabedini, University of WollongongFollow
Gordon G. Wallace, University of WollongongFollow

RIS ID

97980

Publication Details

Jamali, S. S., Moulton, S. E., Tallman, D. E., Forsyth, M., Weber, J., Mirabedini, A. & Wallace, G. G. (2015). Corrosion protection afforded by praseodymium conversion film on Mg alloy AZNd in simulated biological fluid studied by scanning electrochemical microscopy. Journal of Electroanalytical Chemistry, 739 211-217.

Abstract

Surface passivation of AZNd Mg alloy with Pr(NO₃)₃ is studied using scanning electrochemical microscopy (SECM) in surface generation/tip collection (SG/TC) and AC modes. Corrosion protection afforded by the Pr treatment and the degradation mechanism in a simulated biological environment was examined on a local scale and compared with non-treated AZNd. SG/TC mode results revealed a drastic decrease in H2 evolution due to the Pr treatment. Mapping the local insulating characteristics using AC-SECM showed higher conductivity of the surface where H₂ evolution was most favorable.