水性无铬锌铝防腐涂料的研制  

Preparation of Waterborne Chromium-free Zinc-aluminum Anti-corrosive Coatings

作　　者：陈刚 陶齐 刘雪梅[1] CHEN Gang;TA;LIU Xue-mei(Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, Chin)

机构地区：[1]武汉工程大学绿色化工过程教育部重点实验室,武汉430073

出　　处：《现代涂料与涂装》2018年第6期1-3,8,共4页Modern Paint & Finishing

摘　　要：以高模数硅酸盐代替传统铬酐黏结剂,实现无铬黏结,采用硅烷偶联剂对颜料铝粉表面进行包覆改性,以此改性铝粉制备水性锌铝涂层,同时添加一定浓度的磷钼酸钠缓蚀剂提高涂层防腐性能。研究了硅烷偶联剂种类和用量对包覆铝粉在水性体系中分散稳定性的影响,同时考察了缓蚀剂浓度对涂层耐腐蚀性能的影响。通过SEM、EDS、EIS等分析方法对颜料铝粉及涂膜性能进行了表征。结果表明:经5%的WD-60包覆改性后的颜料铝粉分散稳定性较好;添加1%的磷钼酸钠缓蚀剂所制备的锌铝涂层耐腐蚀性能明显提高。The high-modulus silicate was used instead of the traditional chromic anhydride binder to achieve chromium-free bonding. The surface of the pigment aluminum powder was modified by silane coupling agent to prepare the water-based zinc-aluminum coating. Adding a certain concentration of sodium pho- sphomolybdate corrosion inhibitor to improve the corrosion resistance of the coating. The effects of the types and amounts of silane coupling agent on the dispersion stability of coated aluminum powder in aqueous system were studied. At the same time, the effect of corrosion inhibitor concentration on the corrosion resistance of the coating was investigated. The pigment aluminum powder and coating film were characterized by SEM, EDS and EIS. The results show that the dispersion stability of pigment aluminum powder coated by 5% WD-60 is better. The corrosion resistance of zinc-aluminum coating prepared by adding 1% sodium phosphomolybdate inhibitor is obviously improved.

关 键 词：硅烷偶联剂 缓蚀剂 锌铝涂层 

分 类 号：TQ637[化学工程—精细化工]