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在Q235钢表面制备铈盐掺杂乙烯基三乙氧基硅烷膜。利用电化学阻抗谱(EIS)确定了最佳铈盐添加量,利用EIS和动电位极化法研究了涂覆掺杂硅烷膜的Q235钢在3.5%NaCl水溶液中的耐蚀性能,利用扫描电镜(SEM)观察了掺杂硅烷膜的表面形貌。结果表明,铈盐最佳添加量为1×10~(-3) mol/L,经涂镀掺杂硅烷的Q235钢在腐蚀过程中的阳极反应和阴极反应受到抑制,与空白Q235钢相比其腐蚀电流密度减小近3个数量级,极化电阻提高3个数量级,低频阻抗值提高至少4个数量级。
Preparation of Cerium Doped Vinyltriethoxysilane Films on Q235 Steel Surface. The optimum amount of cerium salt was determined by electrochemical impedance spectroscopy (EIS). The corrosion resistance of Q235 steel doped with silane film in 3.5% NaCl aqueous solution was studied by EIS and potentiodynamic polarization. The corrosion resistance of Q235 steel was investigated by scanning electron microscopy (SEM) observed the surface morphology of doped silane film. The results show that the optimum addition amount of cerium salt is 1 × 10 -3 mol / L. The corrosion resistance and corrosion resistance of the Q235 steel doped with silane are inhibited compared with the blank Q235 steel The corrosion current density is reduced by nearly 3 orders of magnitude, the polarization resistance is increased by 3 orders of magnitude, and the low frequency impedance is increased by at least 4 orders of magnitude.