摘要
为提高涂层防腐蚀性能,以3-环氧丙氧丙基三甲氧基硅烷(GPTMS)和N-(3-三甲氧基硅基丙基)乙二胺(NTMDA)为原料,经环氧-胺基开环反应得到含羟基有机桥联硅烷前驱体(GN)。然后,前驱体GN在乙酸催化下制得硅烷溶胶。最后,将硅烷溶胶以浸渍-提拉方式沉积在Q235钢片上,得到含羟基桥联聚倍半硅氧烷涂层。用极化曲线和电化学阻抗谱等技术对涂层的防腐蚀性能进行评价,重点探究了胶体老化时间对涂层防腐蚀性能的影响规律。结果表明:当胶体老化时间为4 h时,涂层在低频0.01 Hz处的电化学交流阻抗相较于空白钢片高出1.5个数量级,具有优异的防腐蚀性能。另外,涂层附着力级别为1级。
To improve the anticorrosion performance of coating,a hydroxyl-containing organic-bridged polysilsesquioxane anticorrosion coating was prepared.Herein,polysilsesquioxane(GN)was synthesized from(3-glycidyloxypropyl)trimethoxysilane(GPTMS)and N-[3-(trimethoxysilylethyl)ethylenediamine(NTMDA)through epoxy-amine ring-opening reaction.Then,the precursor GN was catalyzed by acetic acid to prepare sol.Finally,the hydroxy bridged polysiloxane coating was obtained by depositing the sol on Q235 steel sheet by dip and pull method.The anticorrosion performances of the coated Q235 steel samples were investigated by polarization curve and electrochemical impedance spectroscopy.Furthermore,the effect of aging time on the anticorrosion performance of coating was investigated.When the sol was aged for 4 h,the prepared coating had excellent anticorrosion performance,the impedance at low frequency of 0.01 Hz increased by 1.5 orders of magnitude in contrast to bare Q235 steel.In addition,the coating adhesion level was 1.
作者
张策
刘艳琳
田小静
张万斌
张光华
ZHANG Ce;LIU Yanlin;TIAN Xiaojing;ZHANG Wanbin;ZHANG Guanghua(Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology,Institute of Frontier Science and Technology Transfer,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China;Key Laboratory of Auxiliary Chemistry&Technology for Chemical Industry,Ministry of Education,College of Chemistry and Chemical Engineering,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2020年第7期1352-1358,共7页
Fine Chemicals
基金
国家自然科学基金项目(11904220,51803111)
陕西省自然科学基础研究计划资助项目(2018JQ5089)
陕西科技大学科研启动项目(2016BJ-46)。
