松香改性油酸基咪唑啉季铵盐的缓蚀性能  

Corrosion inhibition of imidazolinylquaternary ammonium salt modified with rosin and oleic acid

作　　者：丁涓[1] 谢晖[1] 黄莉[1] 张浩[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2008年第6期87-90,94,共5页Journal of Nanjing Tech University(Natural Science Edition)

摘　　要：以不同配比的油酸和松香作为原料酸，在一定条件下与二乙烯三胺合成咪唑啉中间体，并用氯化苄进行季铵化得到松香改性油酸基咪唑啉季铵盐．利用红外光谱对产品的结构进行分析，并用静态质量损失法测定产物在盐酸介质中对Q235钢的缓蚀率．结果表明，合成高性能的咪唑啉季铵盐所用的最佳工艺条件为：原料酸中松香摩尔分数20％、二乙烯三胺与酸的摩尔比1．4～1．5、反应温度170--180℃、回流时间4h；当咪唑啉季铵盐作为缓蚀剂加入质量分数达到0．3％～0．4％时，可发挥其最佳缓蚀性能．Imidazoline intermediate was prepared by the reaction of diethylenetriamine with rosin and oleic acid. Adding benzyl chloride, imidazolinylquaternary ammonium salt was prepared through the amination reaction, and the structure was analyzed with infrared spectroscopy （IR） spectrum. Using weight loss method, the inhibition efficiency of the product on Q235 steel in the medium of hydrochloric acid was measured. Results showed that the optimal process conditions were as follows ： the molar percent of rosin in the raw material acid 20% , the molar ratio between diethylenetriamine and acid 1.4 to 1.5, reaction temperature 170 to 180 ℃ and the circumfluence time 4 h. When the concentration of the additive imidazolinylquaternary ammonium salt reached 0. 3 % to 0.4 % , the corrosion inhibition efficiency was better.

关 键 词：松香 油酸 咪唑啉 缓蚀剂 缓蚀率 

分 类 号：TG174.42[金属学及工艺—金属表面处理]