70Cu-30Ni合金管FeSO4预成膜及冲刷腐蚀行为分析

杨新宇, 李祯, 段体岗, 黄国胜, 马力, 刘峰, 姜丹

Erosion Corrosion Behavior in Flowing Seawater for 70Cu-30Ni Alloy Pipelines with Chemical Conversion Film Preformed in Flowing FeSO4 Solution

YANG Xinyu, LI Zhen, DUAN Tigang, HUANG Guosheng, MA Li, LIU Feng, JIANG Dan

表2 FeSO4预成膜处理的70Cu-30Ni合金管不同流速冲刷腐蚀后电化学阻抗拟合结果

Table 2 Fitting results of EIS of 70Cu-30Ni with preformed FeSO4 film after erosion at different

Flow rate / m·s-1 Rs / Ω·cm2 Rc1 / Ω·cm2 Cc1 / F·cm-2 Rc2 / Ω·cm2 Qc2 / F·cm-2 nc2 Rct / Ω·cm2 Qdl / F·cm-2 n 0 25.7 158 2.07×10-7 907 5.85×10-7 0.83 2.37×105 2.98×10-5 0.46 0.5 22.5 205 2.98×10-9 8.57×103 1.13×10-6 0.73 2.28×105 6.91×10-6 0.46 1.5 19.0 29.4 6.13×10-9 905 1.16×10-5 0.82 8.77×104 3.70×10-6 0.48 2.5 26.5 5.97 1.73×10-6 649 3.17×10-5 0.83 6.51×104 2.54×10-5 0.48