Key Laboratory of Aerospace Advanced Materials and Performance Ministry of Education

Laboratory of, China

Key Laboratory of Aerospace Advanced Materials and Performance Ministry of Education

Laboratory of, China
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Guo Q.,Key Laboratory of Aerospace Advanced Materials and Performance Ministry of Education | Liu J.-H.,Key Laboratory of Aerospace Advanced Materials and Performance Ministry of Education | Yu M.,Key Laboratory of Aerospace Advanced Materials and Performance Ministry of Education | Li S.-M.,Key Laboratory of Aerospace Advanced Materials and Performance Ministry of Education
Materials and Corrosion | Year: 2015

Stress corrosion cracking (SCC) and passivation behaviour of ultra-high strength steel 23Co14Ni12Cr3 in neutral 3.5wt% NaCl solution were investigated by slow strain rate test, surface analysis techniques and electrochemical measurements. The passive film on the steel is mainly composed of Fe, Co, Cr and Ni oxides and hydroxides. At potentials less than -850 mVSCE, SCC is controlled by hydrogen induced cracking (HIC). The passive film decreases SCC susceptibility of the steel at -400 mVSCE. While, HIC plays a dominant role on SCC mechanism at OCP. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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