3A21铝合金表面1，4-双（3-三乙氧基丙基尿基苯）涂层的耐蚀性研究

腐蚀科学与防护技术, 2011, 23(6): 471-474.

3A21铝合金表面1，4-双（3-三乙氧基丙基尿基苯）涂层的耐蚀性研究

吝大亮 ^1, , 刘瑛 ^2, , 尹晓爽 ^3, , 唐永明 ^4, , 杨文忠 ^5,

1.南京工业大学理学院,南京,210009

2.南京工业大学理学院,南京,210009

3.南京工业大学理学院,南京,210009

4.南京工业大学理学院,南京,210009

5.南京工业大学理学院,南京,210009

关键词：腐蚀 , 铝合金 , 1,4-双(3-三乙氧基丙基尿基苯) , 溶胶-凝胶

Corrosion Perfromance of 1,4-Bis{N-[3-triethoxysilyl Propyl] Ureido} Benzene Coatings on 3A21 Aluminum Alloy

Keywords： corrosion , aluminum alloy , 1,4-Bis{N-[3-triethoxysilyl propyl] ureido} benzene , sol-gel

为探讨有机硅对3A21铝合金的防腐性能，合成了1，4-双（3-三乙氧基丙基尿基苯）（BTPUB），采用溶胶-凝胶法在3A21铝表面制备了不同的BTPUB涂层，采用循环伏安法研究前驱体中BTPUB的浓度和腐蚀效果的关系，采用浸泡实验和电化学阻抗谱研究BTPUB涂层对3A21铝合金的保护机理．结果证明随着前驱体中BTPUB的浓度的增大涂层对铝的保护效果越好，BTPUB涂层对3A21铝合金具有较好的保护效果．

1,4-Bis{N-[3-triethoxysilyl propyl] ureido} benzene （BTPUB） was prepared by the reaction of 3-（triethoxysilyl）propyl isocyanate with 1,4-phenylenediamine. Ethanol solutions with different concentrations of BTPUB was prepared as precursor and then to prepare coatings on 3A21 aluminum alloy by sol-gel method. The protectiveness of the coatings was studied by cyclic voltammetry, the corrosion resistance was evaluated by electrochemical impedance spectroscopy and immersion test. The results indicate that the corrosion resistance of the BTPUB coating is excellent in NaCl solution.

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