Stress corrosion cracking initiation susceptibility of Alloy 182 with different surface treatments

Zaiqing Que (Corresponding Author), Timo Saario, Aki Toivonen, Ulla Ehrnstén

    Research output: Contribution to journalArticleScientificpeer-review

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    Abstract

    The effects of machining surface preparations on the stress corrosion cracking (SCC) susceptibility in boiling water reactor environment were evaluated for Alloy 182 weld metal. Constant extension rate tensile test, constant load test and electrochemical tests (passivation, current-voltage curves and electrochemical impedance spectroscopy) showed that the surface treatments strongly influence the resistance to SCC initiation. The machining-induced deformation and surface oxide layer from the surface treatments affect the re-passivation behaviour and SCC initiation susceptibility. The SCC susceptibility of the studied surface treatments was found following the sequence of shot peened > industrial surface milled > polished > advanced manufactured surface.
    Original languageEnglish
    Article number110037
    JournalCorrosion Science
    Volume196
    DOIs
    Publication statusPublished - Mar 2022
    MoE publication typeA1 Journal article-refereed

    Keywords

    • environmentally-assisted cracking
    • Alloy 182
    • stress corrosion cracking
    • passivation
    • surface treatment

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