咪唑啉季铵盐缓蚀剂的合成及性能评价

Synthesis of Imidazoline Quaternary Ammonium Salt Inhibitor and Corrosion Inhibition Performance

采用硬脂酸、苯甲酸、月桂酸、二乙烯三胺和三乙烯四胺为原料,合成了多种咪唑啉及咪唑啉季铵盐缓蚀剂,对N80钢在的盐酸中有较好的缓蚀作用,其中合成的咪唑啉季按盐的缓蚀性能更为优异。咪唑啉季铵盐类型缓蚀剂MBT在投加量为0.5%时,在12%HCl(60℃,4h)酸液中,N80钢腐蚀速率为0.692g/(m2.h)。该产品与缓蚀剂复配后得到了缓蚀剂SE-1,缓蚀性能得到进一步提高,加量为2%时,在土酸(150℃,4h)介质中,N80钢片在的腐蚀速率为15.91g/(m2·h)。并用动电位扫描技术,对咪唑啉缓蚀剂的缓蚀性能进行了极化行为研究。

Imidazolines imidazolinyl-quaternary ammonium salts were synthesized from stearic acid ,benzoic acid, lauricacid, diethylene triamine and triethylenetetramine which offered good corrosion inhibition for N80 steel,and imidazoline quaternary ammonium salts perform much better. The corrosion rate of N80 steel material was reduced to 0.692g/m2h by adding 0.5% midazoline quaternary ammonium salt MBT in the acidic liquid with 12% chlorhydric acid at 60℃.When it is used with corrosion inhibitors,the inbibition performance can be further improved. The corrosion rate of N80 steel material is reduced to15.91g/m2h in the acidic liquid with mud acid at 150℃ by adding 2% inhibitors. And their inhibiting types are discussed by electrochemical experiments.