弹性拉应力下Q235碳钢在5%NaCl盐雾中的成锈行为及其机理

李谦, 刘凯, 赵天亮

Rust Formation Behavior and Mechanism of Q235 Carbon Steel in 5%NaCl Salt Spray Under Elastic Tensile Stress

LI Qian, LIU Kai, ZHAO Tianliang

表2 不同弹性拉应力水平的加载方式A和B下Q235碳钢在5%NaCl盐雾中暴露15 d后EIS的拟合结果

Table 2 Fitting results for the EIS curves of Q235 carbon steel under loading modes A and B with various elastic tensile stress levels after exposed in 5%NaCl salt spray for 15 d

Mode Stress Rs Qrust (Y0) nrust Rrust Qct (Y0) nct Rct W χ2 level Ω·cm2 10-2 Ω-1·cm-2·s n Ω·cm2 10-2 Ω-1·cm-2·s n Ω·cm2 10-2 Ω-1·cm-2·s0.5 10-4 A 0σs 11.60 1.05 0.52 10.51 0.17 0.68 53.21 6.88 7.21 0.5σs 9.59 0.52 0.49 11.25 0.62 0.60 46.28 6.52 1.91 0.8σs 10.83 0.24 0.43 12.59 1.38 0.62 32.98 5.98 4.61 0.95σs 9.94 0.14 0.37 14.46 2.36 0.57 29.04 5.46 2.01 B 0σs 11.60 1.05 0.52 10.51 0.17 0.68 53.21 6.88 7.21 0.5σs 8.76 0.36 0.51 9.94 1.46 0.54 35.43 6.64 1.78 0.8σs 10.19 0.32 0.48 9.07 2.68 0.48 21.62 6.24 3.16 0.95σs 12.16 0.51 0.47 8.83 2.78 0.44 16.48 6.13 2.08