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Influence of the aging time on the microstructure and electrochemical behaviour of a 15-5PH ultra-high strength stainless steel

By H. Luo, H. Luo, Q. Yu, C. Dong, G. Sha, Z. Liu, J. Liang, L. Wang, G. Han and X. Li

Abstract

The effect of the aging time at 500 °C on the microstructure evolution and electrochemical behaviour of 15-5PH ultra-high strength martensitic stainless steel is presented. The results show that Cu-rich clusters and (Cu, Nb)-rich nanoparticles are observed from 1 min to 240 min. The aging time influences the pitting resistance and semiconductive behaviour of the passive film in a chloride solution. The disappearance of Cu species in the passive film after 240 min is attributed to the precipitation of Cu-rich nanoparticles. Moreover, the variations in the Cr/Fe ratio and dehydration effect with the aging time are discussed. © 2018 Elsevier Lt

Year: 2018
DOI identifier: 10.1016/j.corsci.2018.04.032
OAI identifier: oai:escidoc.org:escidoc:2630390
Provided by: MPG.PuRe
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