正辛酸三乙醇胺盐的合成及缓蚀性能研究  

Study of the Synthesis Technology and Corrosion Inhibition Performance of Salt of Caprylic Acid and Triethanolamine

作　　者：王玉超 于维雨 WANG Yuchao;YU Weiyu(Mine Oil Products Branch,Coal Science and Technology Research Institute Company,Beijing 100013,China;National Energy Technology&Equipment Laboratory of Coal Utilization and Emission Control,Beijing 100013,China;State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources,Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司矿用油品分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013 [3]国家能源煤炭高效利用与节能减排技术装备重点实验室,北京100013

出　　处：《北京石油化工学院学报》2020年第3期7-10,共4页Journal of Beijing Institute of Petrochemical Technology

基　　金：煤炭科学技术研究院科技发展基金资助项目(2017CX05)。

摘　　要：在正辛酸与三乙醇胺物质的量比为1∶1.6、温度为80℃、时间为2 h的条件下合成了正辛酸三乙醇胺盐,并对其对HT300灰铸铁的侵蚀性能和机理进行了研究。结果表明,在正辛酸三乙醇胺盐水溶液中,当质量分数为0.08%,单片防锈性能为A级;质量分数为0.15%,挂片试验试件出现腐蚀点时间为18 h。通过电化学极化曲线测试发现,正辛酸三乙醇胺盐对HT300铸铁腐蚀阳极反应有明显抑制作用,能够使HT300铸铁的自腐蚀电位正向偏移,使自腐蚀电流密度减小。The salt of caprylic acid and triethanolamine was synthesized,when molar ratio of n(caprylic acid)/n(caprylic acid)was 1∶1.6,temperature of synthesis was 80℃ and time was 2 h.The results show that its aqueous solution has good antirust property in the single-piece rust resistance testing and the corrosion coupon testing.The corrosion behaviors of gray cast iron(HT300)in its solution were studied by polarization curve,it had a suppressing effect on anodic reaction and made corrosion potential of gray cast iron(HT300)deviate positively and self-corrosion current density decrease.

关 键 词：缓蚀剂 正辛酸 三乙醇胺 自腐蚀电位 

分 类 号：TG174[金属学及工艺—金属表面处理]