摘要： 以硅酸钾为成膜基液，通过 γ-（2，3-环氧丙氧）丙基三甲氧基硅烷（KH-560）和硅溶胶对硅酸钾溶液进行改性，同时复配聚二甲基硅氧烷（PTMS）分散体、增韧乳液，制备水性无机硅酸锌涂料，以增强漆膜的力学性能、耐腐蚀性能、耐水性、贮存稳定性、抗开裂性能等。采用电化学等方法，对漆膜的耐腐蚀性和腐蚀机理进行了研究。结果表明：在盐雾实验过程中，在漆膜界面处产生新的腐蚀产物改变了微电流耦合的能力，并为氯离子的扩散提供了屏障，起到阻滞作用，降低了锌的腐蚀速率，提高了漆膜寿命和耐腐蚀性能。

关键词: 无机硅酸锌涂料, 硅酸钾, 腐蚀机理, 耐腐蚀性, 高模数

Abstract: In order to improve the mechanical properties，corrosion resistance，water resistance，storage stability，crack resistance of the coating，with potassium silicate as the film-forming base solution，which was modified by γ-（2，3-epoxypropoxy）propytrimethoxysilane（KH-560） and silica sol，compounding with polydimethylsiloxane（PTMS） dispersion and toughening latex，the waterborne inorganic zinc silicate coatings was prepared，The corrosion resistance and corrosion mechanism of the coating were studied using electrochemical method.The results showed that in the salt spray process，the new corrosion products at the coatinginterface changed the micro-current coupling ability and provided a barrier for the diffusion of chloride ions，which played a blocking role to reduce the corrosion rate of zinc，improved the coating service life and the corrosion resistance.

Key words: inorganic zinc silicate coatings, potassium silicate, corrosion mechanism, corrosion resistance, high modulus

中图分类号: 

• TQ635. 2