PCB-HASL电路板在NaHSO3/Na2SO3溶液中的腐蚀电化学行为

丁康康, 肖葵, 邹士文, 董超芳, 赵瑞涛, 李晓刚

ELECTROCHEMICAL CORROSION BEHAVIOR OF PCB-HASL IN NaHSO3/Na2SO3 SOLUTION

DING Kangkang, XIAO Kui, ZOU Shiwen, DONG Chaofang, ZHAO Ruitao, LI Xiaogang

表3 不同pH值0.1 mol/L NaHSO3/Na2SO3溶液中PCB-HASL试样的EIS拟合结果

Table 3 EIS fitting results of PCB-HASL in 0.1 mol/L NaHSO3/Na2SO3 solution with different pH values

Condition Rs Ω·cm2 CPEf S ? s n 1 ? c m - 2 n1 Rf Ω·cm2 CPEdl S ? s n 2 ? c m - 2 n2 Rct Ω·cm2 W S·s5·cm-2 O S·s5·cm-2 B s5 pH=6 15.83 1.35×10-5 0.8881 1914 6.6×10-4 1.0000 230 0.00958 - - pH=7 8.95 1.87×10-5 0.9146 2532 2.4×10-4 1.0000 702 - 2.89×10-3 3.166 pH=8 12.53 1.49×10-5 0.9270 2332 2.0×10-4 0.7269 3951 - 1.48×10-3 5.851 Na2SO3 9.97 4.41×10-6 0.8467 1409 1.2×10-5 0.8207 64400 - 4.79×10-5 6.190