摘要
将改性后的纳米TiO2添加到聚氨酯涂料中并涂敷在A3钢电极表面,通过电化学极化曲线研究A3钢在NaCl溶液中的自腐蚀电流密度。结果表明,选用水油平衡(HLB)值为6. 7的脱水山梨醇单棕榈酸酯或HLB为3. 6的乙二醇脂肪酸酯表面活性剂对纳米TiO2表面处理后,其仍具有半导体光致发光性能,并且可以在有机浆料中实现纳米级分散;添加纳米TiO2聚氨酯涂料对A3钢电极具有明显的光电化学防腐蚀保护作用,电极自腐蚀电流密度下降1~2个数量级,最佳质量分数为1%;纳米TiO2在自然光照和暗室条件下均可降低A3钢的自腐蚀电流密度,提高其耐腐蚀性能。
Modified nano-TiO2 is added into polyurethane coatings,which is coated onto the surface of A3 steel electrode. Self-corrosion current density of the coated A3 steel electrode in Na Cl solution is studied through electrochemical polarization curve. The experimental results show if nano-TiO2 is treated by dehydrated sorbitan monopalmitate with a water-oil equilibrium( HLB) value of 6. 7 or ethylene glycol ester surfactant with an HLB value of 3. 6,it still remains semiconductor photoluminescence properties and can achieve nano-scale dispersion in organic slurry.Polyurethane coatings with modified nano-TiO2 has obvious photoelectrochemical corrosion protection effect on A3 steel electrode,making electrode’s self-corrosion current density decrease by 1-2 orders of magnitude.The best mass fraction of modified nano-TiO2 is 1%.Modified nano-TiO2 can reduce the self-corrosion current density of A3 steel and improve its corrosion resistance under natural light or in darkroom conditions.
作者
姜志国
宋禹泉
姚明
张续
徐瑞芬
解双英
JIANG Zhi-guo;SONG Yu-quan;YAO Ming;ZHANG Xu;XU Rui-fen;XIE Shuang-ying(College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《现代化工》
CAS
CSCD
北大核心
2020年第4期184-187,共4页
Modern Chemical Industry
关键词
纳米TIO2
聚氨酯涂料
A3钢
电极化曲线
自腐蚀电流密度
防腐蚀性能
nano TiO2
polyurethane coatings
A3 steel
electrochemical polarization curve
self-corrosion current density
corrosion resistance
作者简介
姜志国(1965-),男,博士,副教授,研究方向为聚氨酯功能材料,jiangldng@vip.sina.com;通讯联系人:姚明(1966-),男,博士,副教授,研究方向为聚合反应工程,1996500066@mail.buct.edu.cn。
