改性高模数硅酸钾水性无机硅酸锌涂料的制备  

Preparation of Modified High Modulus Potassium Silicate Waterborne Inorganic Zinc Silicate Coatings

作　　者：倪维良[1,2] 李静静 郭亮亮 柳云骐 郭百超[1] 周如东 沈海鹰 Ni Weiliang;Li Jingjing;Guo Liangliang;Liu Yunqi;Guo Baichao;Zhou Rudong;Shen Haiying(State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao,Shandong 266580,China;National Engineering Research Center for Coatings,CNOOC Changzhou Paint and Coatings Industry Research Institute Co.,Ltd.,Changzhou,Jiangsu 213016,China)

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266580 [2]中海油常州涂料化工研究院有限公司,国家涂料工程技术研究中心,江苏常州213016

出　　处：《涂料工业》2023年第7期34-41,共8页Paint & Coatings Industry

基　　金：2022年江苏省关键核心技术(装备)攻关产业化项目。

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。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 byγ-(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 coating interface 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.

关 键 词：无机硅酸锌涂料 硅酸钾 腐蚀机理 耐腐蚀性 高模数 

分 类 号：TQ635.2[化学工程—精细化工]