AZ91镁合金表面合成聚苯胺涂层及其腐蚀性能研究

潘太军, 汪涛

Corrosion Performance and Preparation of Polyaniline Film on the Surface of AZ91 Magnesium Alloy

PAN Taijun, WANG Tao

表2 AZ91镁合金在3.5%NaCl溶液中的电化学阻抗谱拟合结果

Table 2 Fitted results of impedance spectra for AZ91 magnesium alloy after corrosion for various time in 3.5%NaCl solution

Time / h Rs / Ωcm2 Ysl / Ω-1cm-2S-n nsl Rpo / Ωcm2 Ydl / Ω-1cm-2S-n ndl Rct / Ωcm2 L / Hcm2 Rl / Ωcm2 0.25 3.49 2.92×10-6 0.70 8.38 5.79×10-6 1 95.53 17.75 21.08 1 4.65 2.88×10-6 0.74 11.00 8.15×10-6 0.98 205.30 41.67 137.90 5 5.44 4.17×10-6 0.79 14.10 2.97×10-5 0.95 569.10 952.80 330.20 8 4.43 6.63×10-6 0.75 7.39 4.58×10-5 0.93 519.60 3675 1210 12 4.78 1.49×10-5 0.68 6.61 5.02×10-5 0.94 400.50 542.90 823.10 20 4.36 3.30×10-6 0.83 4.69 3.42×10-5 0.99 259.90 374.90 292.80