直流电作用下X70钢在近中性土壤中应力腐蚀行为研究

吴宇航, 陈旭, 王首德, 刘畅, 刘杰

Stress Corrosion Behavior of X70 Steel in an Artificial Near-neutral Soil Solution Under Direct Current

WU Yuhang, CHEN Xu, WANG Shoude, LIU Chang, LIU Jie

表1 不同电流密度下X70钢在NS4溶液中的EIS拟合结果

Table 1 Fitting results of EIS of X70 steel in NS4 solution at different current densities

DC / mA·cm-2 Rs / Ω·cm2 Qf / F·cm2 n1 Rf / Ω·cm2 Qdl / F·cm2 n2 Rct / Ω·cm2 0 122 4.757 × 10-4 0.78 490.5 1.117 × 10-4 0.73 3047 0.1 342.8 8.885 × 10-4 0.85 1173 2.474 × 10-4 0.88 6170 0.5 538.4 1.080 × 10-4 0.96 1999 5.675 × 10-4 - 7133 1 599.6 6.649 × 10-4 0.68 1475 1.252 × 10-4 - 1627