Electrochemical and SVET Studies on the Typical Polarity Reversal of Cu–304 Stainless Steel Galvanic Couple in Cl−-Containing Solution with Different pH
作者： Qingzhao Ni , Xiaojian Xia , Junxi Zhang , Nianwei Dai , Yadong Fan
DOI: 10.1016/J.ELECTACTA.2017.07.020
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摘要: Abstract The typical polarity reversal of the Cu–304 stainless steel galvanic couple (Cu–304SS GC) in Cl − - containing solution with different pH was investigated by open circuit potential (OCP), potentiodynamic polarization, and current techniques conjunction scanning vibrating electrode technique (SVET) electron microscopy (SEM). results showed that change has a significant effect on corrosion behavior 304SS. occurs Cu–304SS GC 0, which red copper is cathodic to 304SS, while 6, 4, 2 anodic With decrease pH, 304SS changes from passive state activation due dissolution film surface thereby facilitating GC.
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