【摘要】 以多巴胺修饰304不锈钢为基体,采用溶胶凝胶法和自组装成膜法制备了SiO2基、TiO2基和SiO2-TiO2混合基有机-无机杂化涂层。探讨了钛酸四丁酯、正硅酸乙酯和11-巯基十一烷酸(MUA)在不锈钢基体上的成膜性和成膜后的抗腐蚀性能。借助金相显微镜观察了不锈钢基体上的杂化膜的显微形貌,塔菲尔曲线和电化学阻抗谱对比分析了杂化膜的抗腐蚀性能。结果表明,MUA和TiO2、SiO2能复合成膜,膜的致密性好,具有可重复性,且引入TiO2和SiO2后,其抗腐蚀性能有较大幅度提高。更多还原

【Abstract】 In this paper,dopamine is used to modify the surface of 304 stainless steels.TiO2,SiO2 and TiO2/SiO2 based hybrid membranes are prepared by sol-gel process and self-assambly method.The film forming properties of tetrabutyl titanate,tetraethoxysilane and 11-mercaptoundecanoic acid(MUA) and anti-corrosion property of the hybrid membranes are investigated.The formation and surface structure of hybrid membranes are characterized by metallurgical microscopy.The results show that hybrid membranes can be successfully fabricated on 304 stainless steel substrates and the compactness of hybrid membranes is better than the simple organic film.The corrosion behavior of hybrid films are evaluated by potentiodynamic polarization and the electrochemical impedance spectroscopy(EIS).The results indicate that hybrid membranes based on the adhesive of poly(dopamine) indeed reduce the corrosion of 304 stainless steels.更多还原