原位聚合聚苯胺改性NiFe-LDH复合涂层的防护性能研究

蒋芳芳, 云虹, 彭莉, 张依豪, 李卫顺, 代文静, 王保峰, 徐群杰

Protective Performance of NiFe-LDH Composite Coatings Modified by insitu Polymerized Polyaniline

JIANG Fangfang, YUN Hong, PENG Li, ZHANG Yihao, LI Weishun, DAI Wenjing, WANG Baofeng, XU Qunjie

表1 304不锈钢表面不同涂层在1 mol/L H2SO4溶液中浸泡不同时间后的电化学阻抗谱拟合参数

Table 1 Fitting parameters of electrochemical impedance spectroscopies of four coatings immersed in 1 mol/L H2SO4 solution for different time

Sample Time / h CPEf / Ω-1·cm-2·S-n Rf / Ω·cm2 CPEdl / Ω-1·cm-2·S-n Rct / Ω·cm2 T / Ω-1·cm-2·S-0.5 t / S-0.5 NiFe(s)-LDH 2 4.89×10-5 1.566 6.23×10-5 25.90 --- --- NiFe-LDH 0 --- --- 4.08×10-5 4.36×105 --- --- 2 --- --- 4.32×10-5 3.39×106 --- --- 8 --- --- 4.42×10-5 1.98×106 --- --- 24 4.27×10-5 422.5 3.31×10-5 1.90×105 --- --- 36 5.63×10-5 400.0 5.78×10-5 9.31×104 --- --- 72 4.85×10-5 413.6 2.00×10-4 4.55×104 --- --- 168 2.60×10-5 438.4 1.82×10-4 7.59×104 --- --- NiFe(s)-LDH/PANI 0 4.59×10-5 162.3 --- --- 0.906 1.873 2 6.08×10-5 183.1 --- --- 0.814 1.574 8 1.35×10-4 175.3 --- --- 0.108 1.295 24 2.14×10-4 224.4 --- --- 0.109 1.081 36 3.46×10-4 190.4 --- --- 0.128 0.827 NiFe-LDH/PANI 0 3.01×10-5 43.2 --- --- 0.477 2.764 2 3.95×10-5 32.6 --- --- 0.386 2.690 8 3.95×10-5 32.6 --- --- 0.254 1.533 24 4.33×10-5 29.9 --- --- 0.209 1.308 36 4.62×10-5 34.7 --- --- 0.221 1.213 72 5.15×10-5 39.4 --- --- 0.195 1.101 168 5.23×10-5 39.1 --- --- 0.186 0.935