X80管线钢在不同pH值红壤模拟溶液中的腐蚀电化学行为

刘淑云, 王帅星, 杜楠, 王力强, 肖金华

Electrochemical Behavior of X80 Pipeline Steel in Simulated Red Soil Solutions with Different pH

LIU Shuyun, WANG Shuaixing, DU Nan, WANG Liqiang, XIAO Jinhua

表2 X80钢在不同pH值的红壤模拟溶液中的EIS拟合结果

Table 2 Fitted results of EIS for X80 steel in simulated red soil solutions with different pH values

pH Rct / Ωcm2 Qdl / Fcm-2 ndl Rf / Ωcm2 Lf / Hcm-2 Qf / Fcm-2 nf R0 / Ωcm2 L0 / Hcm-2 5.5 221.8 8.67×10-5 0.8379 47.14 --- 6.578×10-8 0.8655 --- --- 5.0 145.6 1.813×10-4 0.8058 38.77 --- 3.578×10-7 0.8390 --- --- 4.5 118.4 3.051×10-4 0.7827 30.62 --- 9.026×10-7 0.7927 --- --- 4.0 84.5 7.148×10-4 0.7368 20.57 12.39 4.262×10-4 0.1726 11.84 3.681×10-5 3.5 46.9 3.567×10-4 0.816 11.72 2.8 1.051×10-4 0.0750 3.145 1.077×10-5 3.0 47.48 3.115×10-4 0.8856 17.55 10.21 3.304×10-4 0.0809 3.182 1.052×10-4