Abstract This paper describes the stress corrosion cracking (SCC) mechanism of a new structural ultrahigh strength martensite steel Cr9Ni5MoCo14 and how cathodic potential affects the SCC susceptibility in 3.5% NaCl solution. At open circuit potential (OCP), SCC cracks initiate from pittings, and SCC mechanism involves anodic dissolution. Within the ideal cathodic protective potential range from 500 mV to 700 mV , the specimen has a greater SCC resistance, and SCC mechanism is mixed-controlled by both anodic dissolution and hydrogen-induced cracking. Significant hydrogen-induced crack is observed at 1100 mV which can be attributed to a significant amount of hydrogen atoms involving in the cracking processes.


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    Title :

    Stress corrosion cracking of ultrahigh strength martensite steel Cr9Ni5MoCo14 in 3.5% NaCl solution


    Contributors:
    Sun, Min (author) / Xiao, Kui (author) / Dong, Chaofang (author) / Li, Xiaogang (author) / Zhong, Ping (author)

    Published in:

    Publication date :

    2014-03-08


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English