Gemini型咪唑啉双季铵盐金属缓蚀剂的合成及其性能

合成了系列新型咪唑啉双季铵盐阳离子缓蚀剂(S-HSJ),研究并讨论了其在5%HCl介质中对铜、铁、铝等金属的缓蚀性能及缓蚀剂结构中亲油基部分碳链长度、缓蚀时间、缓蚀剂浓度等对缓蚀效果的影响. 研究表明,S-HSJ系列咪唑啉双季铵盐对红铜、黄铜、铝及马口铁四种金属均表现出较传统单季铵盐与苯并三氮唑缓蚀剂好的缓蚀性能,S-HSJ-16双季铵盐添加量0.1%时缓蚀效率可达94%~99%,S-HSJ与阴离子表面活性剂复配对铜腐蚀表现出明显协同效应.

Synthesis and Properties of Gemini Imidazoline Quaternary Ammonium Salts as Corrosion Inhibitor

A new series of Gemini imidazoline quaternary ammonium salts as corrosion inhibitor(S-HSJ) was synthesized. The corrosion inhibition performance, the influences of carbon chain length in lipophilic structure, corrosion time and corrosion inhibitor concentration were investigated comprehensively. The experiments for copper, brass, aluminum and tinplate were conducted in 5% hydrochloric acid solutions with the help of mass loss method. The results show that the inhibition effects of the series of S-HSJ corrosion inhibitor are better than those of traditional quaternary ammonium salts and benzotriazole for several metals. The inhibition efficiency of S-HSJ-16 can reach 94%~99% when an amount of 0.1% such an inhibitor was added. The complex inhibition ability with anion surfactant shows an obviously synergistic effect.