作　　者： (李伟光）; (袁斌）; (何冠宁）; (贾群坡）;

机构地区： 广东工业大学环境科学与工程学院,广东广州510006

出　　处： 《应用化工》 2017年第9期1752-1756,1760,共6页

摘　　要： 以油酸和β-羟乙基乙二胺为主料,氧化钙为脱水剂,经过酰胺化、环化,合成了1-(β-羟乙基)-2-(十七烯-8'-基)咪唑啉中间体,采用正交实验法优化的最佳合成条件是:油酸与β-羟乙基乙二胺的摩尔比1∶1.1,酰化温度60℃,酰化时间4 h,环化温度140℃,环化时间5 h。中间体与2-(1-苯并三氮唑基)乙酰氯反应,合成了新型2-(1H-苯并三氮唑基)乙酸-β-[2-(十七烯-8'-基)-1-咪唑啉基]乙酯缓蚀剂,利用红外光谱对其分子官能团结构进行了表征,采用静态失重法与电化学极化曲线法,评价了该缓蚀剂的缓蚀性能,并通过电镜观测了腐蚀试片的形貌。结果表明,在5%HCl介质中,温度60℃、腐蚀时间6 h、缓蚀剂量40 mg/L的条件下,Q235碳钢的缓蚀率达到96.76%;在5%H_2SO_4介质中,温度60℃、腐蚀时间6 h、缓蚀剂量60 mg/L的条件下,H62黄铜缓蚀率达到87.37%。电化学极化曲线测定结果显示,该缓蚀剂是一种以阴极为主的混合型缓蚀剂。 1-（β-Hydroxyethyl ）-2-（ 8’- heptadecenyl） imidazoline intermediate was synthesized by oleic acid and β-hydroxyethyl ethylenediamine through amidation and cyclization, with C a O as the dehydrating agent. By orthogonal experiments the optimum synthetic condition was at a 1： 1. 1 mole ratio for raw mate-rials （oleic acid： hydroxyethyl ethylenediamine） ,a amidation temperature of 60 ℃ and 140 ℃ for cycliza- tion temperature,4 h for amidation and 5 h for cyclization. A new 2-（l H - benzotriazol-1＇ - yl） acetic acid- β- [ 2 - （ 8r - heptadecenyl） -1 -imidazolinyl ] ethyl ester corrosion inhibitor was then synthesized by above in-termediate and 2-（1 - benzotriazole） -acetyl chloride. The corrosion inhibitor was characterized by FTIR and static weight loss method and electrochemical polarization curves were carried out to examine the corrosion inhibition efficiency, SEM analysis was taken to observe the surface morphology of steel. Results showed that the inhibition rate of the inhibitor for Q 235 steel was up to 96. 7 6 % at a concentration of 40 m g / L for 6 h in 5% HC 1 at 60 ℃ ,and a 87.37% inhibition efficiency for H 62 steel in 5 % sulfuric acid at a dos-age of 60 mg/L for 6 h at 60 ℃ . The electrochemical experiment approved that the corrosion inhibitor is a kind of mixed-type corrosion inhibitor,mainly cathode type.

关 键 词： 苯并三氮唑 咪唑啉 缓蚀剂 油酸 合成