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以松香、二乙烯三胺、3-氯-2-羟基丙烷磺酸钠和硫脲为主剂合成了硫脲基松香咪唑啉季铵盐,对其结构进行了红外和核磁(~(13)CNMR)表征。通过静态失重法和电化学方法考察了硫脲基松香咪唑啉季铵盐在酸性介质中的缓蚀性能,结合成膜理论以及缓蚀剂的分子结构,对自制缓蚀剂的缓蚀机理做出了解释。结果表明:303 K下,在质量分数为15%的盐酸介质中加入占盐酸质量0.4%的硫脲基松香咪唑啉季铵盐,其缓蚀率可达90.81%;自制缓蚀剂吸附在碳钢表面形成吸附膜,从而起到缓蚀作用。
The thiourea - based rosin imidazoline quaternary ammonium salt was synthesized with rosin, diethylenetriamine, sodium 3 - chloro - 2 - hydroxypropane sulfonate and thiourea as the main agent. The structure of the product was characterized by IR and NMR (~ (13) CNMR) characterization. The corrosion inhibition properties of thiourea-based rosin imidazoline quaternary ammonium salt in acid medium were investigated by static weight loss method and electrochemical method. Combined with the theory of film formation and the molecular structure of corrosion inhibitor, the corrosion inhibition mechanism of self-made corrosion inhibitor Out of explanation. The results showed that the thiourea-based rosin imidazoline quaternary ammonium salt accounted for 0.4% by weight of hydrochloric acid at 15%, and the corrosion inhibition rate was up to 90.81%. The self-made inhibitor adsorbed on carbon Steel adsorption film formed on the surface, which play a role in corrosion inhibition.