【作者】 印仁和； 姬学彬； 董晓明； 张新胜； 曹为民； 张磊； 石新红；

【Author】 YIN Renhe~(1) JI Xuebin~(1) DONG Xiaoming~(1) ZHANG Xinsheng~(2) CAO Weimin~1 ZHANG Lei~(1) SHI XINhong~(1) (1.Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, 2.National United Chemical Engineering Laboratory Shanghai 200237) Supported by National Natural Science Foundating of China and Baoshan Steel Complex of Shanghai (No.50371053), National United Chemical Engineering Laboratory (W0703)

【机构】 上海大学理学院化学系； 国家重点化学工程联合实验室；

【摘要】 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 研究其表面形貌,并测出不同条件下聚合膜的厚度。对聚合膜进行交流阻抗和盐雾实验,结果证明加入γ-APS 后聚苯胺膜层的致密性和耐腐蚀性大大提高,接近铬酸盐钝化膜。通过 XPS 谱图分析,得到γ-APS 改性聚苯胺膜掺杂度11%,氧化度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 谱图分析,发现聚苯胺膜中存在四种化学环境:C-Si-O-Si,C-Si-OH,C-Si-O-C,C-Si-O-Zn。更多还原

【Abstract】 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.更多还原