Ziang Su, Jie Pang, yu xin, Nazhen Liu, Xiangju Liu, Xiaoxuan Han, Weichen Xu, X Chen
In this study, the galvanic corrosion behavior of Cu and CS (carbon steel) in simulated Beishan groundwater was investigated. The influence of Cu:CS area ratio (up to 8000), temperature (20–70 °C), O 2 content (groundwater sparged with air, N 2 , and in a N 2 -filled glove box), on galvanic current density ( i g ) was investigated. In the presence of sufficient O 2 , the slope of steady-state galvanic current density ( i g ∞ ) to Cu:CS area ratio indicates the segmented control process of galvanic corrosion, which are O 2 reduction kinetic control, O 2 diffusion control, and anodic reaction control. As Cu:CS area ratio increases, i g ∞ plateaus show up, revealing the most intense galvanic corrosion situation. As the O₂ content decreases, the Cu:CS area ratio at which the i g ∞ plateau appears decreases. In addition, it was found that in the presence of O 2 , Cu, as the cathode of the galvanic couple, undergoes anodic dissolution. The dissolution of Cu + was confirmed by complexing it with bathocuproine disulfonate disodium (BCS). The oxidation of Cu + to Cu 2+ in solution was confirmed by ICP-MS analysis.