Journal
CORROSION SCIENCE
Volume 221, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2023.111364
Keywords
Zinc injection; Stress corrosion cracking; Initiation; Mitigation; Nickel -based alloy; Light water reactor
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The stress corrosion cracking (SCC) behavior of nickel-based weld metal Alloy 182 was investigated in simulated light water reactor environments with or without zinc (Zn) addition. It was found that Zn injection is able to effectively mitigate SCC, even at the lowest tested concentration of 15 ppb. This beneficial effect may be attributed to the modified surface oxide film by Zn incorporation.
The stress corrosion cracking (SCC) behaviour of nickel-based weld metal Alloy 182 was studied in simulated light water reactor environments with or without zinc (Zn) addition. Accelerated SCC initiation tests with flat tapered tensile specimens, as well as SCC initiation and short crack growth tests with compact tension specimens revealed that Zn injection is able to effectively mitigate SCC. Even the lowest tested Zn concentration of 15 ppb seems to be enough to achieve a significant mitigation effect on SCC initiation and short crack growth. This beneficial effect may be related to the modified surface oxide film by Zn incorporation.
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