摘要
为了解决塔里木油田污水运输管网的腐蚀问题,合成了3种咪唑啉季铵盐缓蚀剂,在油田模拟水中,利用静态挂片质量损失法和电化学极化曲线法测试了3种缓蚀剂的缓蚀性能,并初步探讨了咪唑啉类缓蚀剂的缓蚀机理。试验结果表明:在油田模拟水中,月桂酸咪唑啉季铵盐缓蚀剂的缓蚀效果最好;按不同比例复配缓蚀剂的缓蚀效果更好,苯甲酸咪唑啉和月桂酸咪唑啉复配缓蚀剂添加量为600 mg/L时缓蚀效率可达97.31%。极化曲线研究表明:在盐酸介质中添加苯甲酸季铵盐缓蚀剂可使自腐蚀电位正移,对阳极反应有较强抑制作用;加入油酸季铵盐缓蚀剂和月桂酸季铵盐缓蚀剂则使得自腐蚀电位负移,对阴极反应有较强抑制作用。
In order to solve corrosion problem in Tarim oilfield sewage transportation network, three kinds of imidazoline quaternary ammonium salt corrosion inhibitor were synthesized, of which properties were tested in simulated oilfield water by means of static hanging mass loss and electrochemical polarization curve, and inhibition mechanism was also discussed. The results showed that laurie acid imidazoline quaternary ammonium salt corrosion inhibitor performed excellently in simulated oilfield water, while mixed inhibitor in different proportion could perform better. The inhibition efficiency reached 97.31% when the content of mixed inhibitor （ benzoate imidazoline and laurie acid imidazoline） reached 600 mg/L. Polarization curves discovered that corrosion potential was shifted to positive ＇after adding quaternary ammonium salt inhibitor of benzoic acid into hydrochloric acid, which had a strong inhibitory effect on anodic reaction; while corrosion potential was shifted toward negative after adding oleic acid quaternary ammonium salt inhibitor and laurie acid quaternary ammonium salt corrosion inhibitor simultaneously, which had a strong inhibitory effect on cathodic reaction.
出处
《石油化工腐蚀与防护》
CAS
2017年第4期6-9,共4页
Corrosion & Protection In Petrochemical Industry
基金
北京化工大学-塔里木大学联合项目(03705337)
塔里木大学大学生创新项目(2013017)
关键词
咪唑啉
缓蚀剂
缓蚀效率
极化曲线
缓蚀机理
imidazoline, inhibitor, inhibition efficiency, polarization curve, inhibition mechanism
