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2 在0.1 mol/L NaHSO3溶液中浸泡不同时间的PCB-HASL试样的EIS谱拟合结果

Table 2 EIS fitting results of PCB-HASL immersed in 0.1 mol/L NaHSO3 solution for different times

Time h Rs Ω·cm2 CPEf S ? s n 1 ? c m - 2 n1 Rf Ω·cm2 L H·cm2 RL Ω·cm2 CPEdl S ? s n 2 ? c m - 2 n2 Rct Ω·cm2 W S·s5·cm-2 0.5 13.45 6.96×10-6 0.8687 1617 5.48×104 1.30×104 0.000078 0.8639 1014 0.004347 1 14.80 7.62×10-6 0.8798 1291 7.79×104 1.41×104 0.000147 0.8144 627.6 0.007080 2 14.09 1.23×10-5 0.8629 1057 - - 0.000538 0.8778 265.2 0.012620 3 14.33 1.57×10-5 0.8642 856.4 - - 0.001199 0.9109 190.8 0.012550 6 14.35 2.49×10-5 0.8748 769.4 - - 0.001360 1.0000 198.1 0.012980 12 15.02 3.90×10-5 0.8871 4231 - - 0.000966 0.9675 721.2 0.005176 24 11.83 1.07×10-4 0.9312 3229 - - 0.000162 0.8475 7817 - 36 19.26 1.02×10-4 0.9429 3435 - - 0.000141 0.8429 9405 - 72 14.15 1.30×10-4 0.9074 6213 - - 0.000251 0.8375 8179 - 120 18.86 7.82×10-4 0.7614 6418 - - 0.000155 0.9063 10000 -