一种咪唑啉缓蚀剂的合成及缓蚀性能评价  

Synthesis and Performance Evaluation of an Imidazoline Inhibitor

作　　者：上官昌淮[1,2] 王霞[3] 杜磊[1,2] 殷名学[1,2] 李科[1,2] 

机构地区：[1]中国石油工程设计有限公司西南分公司,成都610500 [2]中国石油天然气集团公司石油管力学和环境行为重点实验室四川研究室,成都610500 [3]西南石油大学材料学院,成都610500

出　　处：《腐蚀与防护》2011年第7期528-531,537,共5页Corrosion & Protection

摘　　要：采用正交试验法和静态挂片失重法,研究了以油酸和三乙烯四胺为反应物、二甲苯为携水剂,且适合某模拟采出水的咪唑啉缓蚀剂的性能及其合成条件。通过红外光谱、静态腐蚀失重、电化学测试和扫描电镜等方法,研究了咪唑啉分子结构和缓蚀性能。结果表明,咪唑啉最佳合成反应条件为酸胺比为1.0:3.1,合成温度为190℃,反应时间为7 h,此时缓蚀效率达到90%;该类型缓蚀剂在低于60℃介质环境中,最佳使用浓度为300mg/L,此时缓蚀率为93%,使用周期约为30 h;极化曲线表明,该缓蚀剂为混合型缓蚀剂;扫描电镜表明,缓蚀剂抑制了腐蚀反应和腐蚀产物的生长。An imidazoline inhibitor was synthesized from oleic acid and diethylenetriamine as reactants, and triethylenetetramine as water carrying agent, The influences of inhibitor concentration, synthesis temperature and reaction time on corrosion inhibition performance were studied by orthogonal experiment and weight loss method. The molecular structure and corrosion inhibiting performance were studied by infrared spectrum, weight loss testing, electrochemiscal measurement and SEM. Results indicate that the optimized parameters for the synthesis are as follows： the ratio of oleic acid to triethylenetctramine is 1.0 ： 3.1, synthesis temperature is 190℃, reacting time is 7h. Under the optimal syntketic react;on conditions, the corrosion inhibition efficiency of the prepared inhibitor is over 90%. The optimized temperature and concentration for using this inhibitor are below 60℃ and 300my/L, respectively, at this concentration the corrosion inhibition efficiency is over 93%. The electrochemiscal polarization curves show that the inhibitor can be classified as a mixed type corrosion inhibitor. SEM indicated that the inhibitor prevented corrosion reaction and blocked the growth of the corrosion product.

关 键 词：缓蚀剂 合成 缓蚀性能 极化曲线 扫描电镜 

分 类 号：TG174.41[金属学及工艺—金属表面处理]