铜合金在不同pH值3.5%NaCl溶液中的浸泡腐蚀性能研究

靳振廷, 宋亓宁, 刘琪, 彭春兰, 许楠, 陆其清, 包晔峰, 赵立娟, 赵建华

Long-term Corrosion Behavior of Three Cu-alloys in 3.5%NaCl Solutions with Different pH Values

JIN Zhenting, SONG Qining, LIU Qi, PENG Chunlan, XU Nan, LU Qiqing, BAO Yefeng, ZHAO Lijuan, ZHAO Jianhua

表3 MAB、NAB和MB在不同pH值3.5% NaCl溶液中浸泡不同时间后的EIS拟合结果

Table 3 Fitting data of the EIS results for the three copper alloys in the solutions with different pH values

pH value Material Immersion time / h RsΩ·cm2 Y1Ω-1·s n n1 RfkΩ·cm2 Y2Ω-1·s n n2 RctkΩ·cm2 WΩ-1·s-0.5 6.8 MAB 0 6.32 4.435 × 10-4 0.78 0.26 3.578 × 10-5 0.99 1.46 5.23 × 10-3 240 9.82 4.989 × 10-4 0.74 2.67 1.736 × 10-3 0.68 3.91 - 720 11.65 4.133 × 10-4 0.71 8.25 1.435 × 10-3 0.93 7.27 - NAB 0 5.70 8.026 × 10-4 0.65 0.82 5.301 × 10-3 0.60 0.94 3.81 × 10-4 240 7.03 1.808 × 10-4 0.85 6.68 2.085 × 10-3 0.78 14.44 - 720 10.56 1.442 × 10-4 0.84 10.89 1.585 × 10-5 0.86 31.20 - MB 0 6.35 2.065 × 10-4 0.80 0.55 9.498 × 10-4 0.56 4.67 - 240 11.52 3.102 × 10-4 0.62 8.62 2.555 × 10-4 0.67 17.34 - 720 12.46 2.199 × 10-4 0.70 9.82 9.381 × 10-5 0.74 24.43 - 12 MAB 0 5.80 2.19 × 10-4 0.73 0.50 6.507 × 10-4 0.85 0.96 4.27 × 10-3 240 8.88 3.994 × 10-4 0.71 3.31 7.778 × 10-4 0.85 6.62 - 720 9.97 3.727 × 10-4 0.68 9.02 1.285 × 10-3 0.95 12.07 - NAB 0 7.10 2.327 × 10-5 0.89 0.76 9.484 × 10-5 0.54 9.04 7.12 × 10-4 240 7.82 1.264 × 10-4 0.80 12.69 4.457 × 10-7 0.77 146.5 - 720 9.40 1.083 × 10-4 0.80 19.54 5.952 × 10-7 0.81 171.8 - MB 0 35.69 1.263 × 10-5 0.92 5.74 5.031 × 10-5 0.51 34.61 - 240 8.94 4.216 × 10-5 0.80 26.03 3.123 × 10-5 0.66 79.29 - 720 10.81 3.107 × 10-5 0.82 36.34 3.789 × 10-5 0.72 180.50 -