文章摘要
张策,刘艳琳,田小静,张万斌,张光华.老化时间对桥连聚硅氧烷涂层防腐性能的影响[J].精细化工,2020,37(7):0
老化时间对桥连聚硅氧烷涂层防腐性能的影响
Effect of aging time on the anticorrosion properties of organic-bridged polysilsesquioxane coating
投稿时间:2020-01-04  修订日期:2020-03-03
DOI:
中文关键词: 有机桥连聚倍半硅氧烷涂层  溶胶-凝胶法  浸渍提拉  防腐蚀
英文关键词: organic-bridge polysilsesquioxane coating  sol-gel  dip-coating  anticorrosion
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
张策 陕西科技大学 zhangce@sust.edu.cn 
刘艳琳 陕西科技大学  
田小静 陕西科技大学  
张万斌 陕西科技大学  
张光华 陕西科技大学  
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中文摘要:
      为提高涂层防腐蚀性能,以环氧丙氧丙基三甲氧基硅烷(GPTMS)和N-(3-三甲氧基硅基乙基)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。
英文摘要:
      To improve the anticorrosive performance of polysilsesquioxane coating, the hydroxyl-containing organic-bridged polysilsesquioxane anticorrosive coating was prepared through sol-gel and dip-coating technique, in which the sol was synthesized by acetic acid catalyzed polysilsesquioxane precursor GN. The polysilsesquioxane precursor GN was synthesized by 3-glycidoxypropyltrimethoxysilane (GPTMS) and N-[3-(trimethoxysilyl)propyl]ethylenediamine (NTMDA) through epoxy-amine ring-opening reaction. The anticorrosive performance of the coated Q235 steel specimens was investigated by polarization curve and electrochemical impedance spectroscopy. Furthermore, the effect of aging time on the anticorrosion performance of coatings was investigated. When the aging time was 4 h, its impedance at low frequency of 0.01 Hz increased by 1.5 orders of magnitude in contrast to the bare Q235 steel. In adhesion evaluation test, the coating performed level 1.
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