X80管线钢红壤腐蚀初期电化学行为

么惠平, 闫茂成, 杨旭, 孙成

Electrochemical Behavior of X80 Pipeline Steel in the Initial Stage of Corrosion in an Acidic Red Soil

YAO Huiping, YAN Maocheng, YANG Xu, SUN Cheng

表1 由等效电路 (CsRs) (QdlRct)拟合所得电化学参数

Table 1 Fitted EIS parameters of X80 steel in the red soil slurry

Time d Rs kΩcm2 Cs 10-10 Fcm-2 Rct kΩcm2 Qdl Y0 / S sncm-2 n 1 5.578 1.233 3.371 1.228×10-4 0.9778 5 5.365 0.828 4.052 1.415×10-4 0.8128 10 4.619 0.932 3.836 2.142×10-4 0.9458 15 3.854 3.825 3.763 3.069×10-4 0.8953 30 3.776 0.950 3.729 1.100×10-3 0.5009 45 3.605 1.181 5.729 1.660×10-3 0.4456 60 3.558 1.253 6.234 1.730×10-3 0.3957