Photoelectrochemical Study of Corrosion Resisting Property of Cupronickel B10 in Simulated Cooling Water

      The corrosion behavior for cupronickel B10 electrode in simulated cooling water has been studied by cyclic voltammetry, photocurrent response method and EIS.The cupronickel electrode shows a p-type photoresponse on positive and negative potential scan, which comes from Cu₂O layer on its surface, but its i_ph,max is less than in borax buffer solution. The corrosion resisting property of the cupronickel B10 electrode appears worse with the increase in the concentration of Cl^-, SO₄^2-, and S^2-ions,as well as pH . When the temperature rises, the photoresponse changes from p-type to n-type, and the corrosion resisting property falls simultaneously. The results of EIS measurements agree well with the results by photoelectrochemical method.