在加入硅烷偶联剂γ-APS的苯胺中性溶液中采用恒电流法在电镀锌钢板上制备聚苯胺膜, 采用SEM观测其表面形貌, 测试不同条件下聚合膜的厚度.交流阻抗和盐雾实验表明, 加入-APS后, 聚苯胺膜层的致密性和防护性明显提高, 接近铬酸盐钝化膜. 通过XPS分析, 得到γ-APS改性聚苯胺膜掺杂度为11%、氧化度为64%; 与改性前聚苯胺膜相比较,掺杂度降低、氧化度增高. 结合红外光谱和XPS分析, 发现聚苯胺膜中存在4种化学环境:C-Si-O-Si, C-Si-OH, C-Si-O-C, C-Si-O-Zn.
The effects of silane on the formation of polyaniline coatings electropolymerized on zinc-electroplated steel have been investigated by Chronopotentiometry technique. The morphology and thickness of polyaniline coatings are investigated by SEM. Corrosion behavior of chromating films and polyaniline coatings in 3.5% NaCl solution is studied by salt spray test and electrochemical impedance spectroscopy (EIS) method. Experimental results show that the anticorrosion properties of polyaniline coatings are close to that of chromating film because of its good shielding and inhibiting properties. From the FTIR and XPS values, conclusions can be as follows: (1) The doping level for the Pani films modified by γ-APS is increased and the oxidation level is reduced comparing with Pani films without modification, which are 11% and 64% respectively；（2）There are four chemical environment : C-Si-O-Si, C-Si-OH, C-Si-O-C， C-Si-O-Zn.
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