Corrosion Resistance of B30 Copper-Nickel Alloy in Simulated Saline Groundwater

The corrosion behavior of B30 copper-nickel alloy in simulated saline groundwater containing different anions was studied by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). The results show that the corrosion resistance of B30 copper-nickel alloy decreased with the increase of Cl^- and HCO₃^- concentrations. Low concentration of SO₄^2- decreased the corrosion resistance of B30 copper-nickel alloy, while high concentration of SO₄^2- improved the corrosion resistance of B30 copper-nickel alloy. The corrosion resistance of B30 copper-nickel alloy in simulated saline groundwater was lower than that in simulated sea water.