三嗪基聚醚双子咪唑啉的合成及缓蚀性能

Synthesis and corrosion inhibition of a triazine polyether Gemini imidazoline inhibitor

为了改善咪唑啉缓蚀剂水溶性差的问题,以三聚氯氰为母体,分别引入一个长的聚醚链和两个油酸咪唑啉结构,设计合成了一种将多类有效的缓蚀基团汇聚于一个结构中的缓蚀剂2,4-二油酸基咪唑啉-6-甲氧基聚乙二醇-1,3,5-三嗪(IPT)。通过失重、电化学技术、接触角和原子力显微镜(AFM)等手段测试了Q235钢在1 mol/L HCl中的缓蚀性能,并分析了其缓蚀机理。结果表明,IPT在1 mol/L HCl中对Q235钢表现出优异的缓蚀效果,30℃,100 mg/L的IPT缓蚀率可达97.90%,即使在70℃时,仍能保证在Q235钢表面稳定的吸附,使缓蚀率保持在97.15%。IPT相较于传统咪唑啉缓蚀剂,在保持良好缓蚀效果的同时,又显著改善了其溶解度不佳的问题。

In order to improve the poor water solubility of imidazoline corrosion inhibitor,a corrosion inhibitor,2,4-dioleate imidazoline-6-methoxy peg-1,3,5-triazine(IPT)was designed and synthesized by introducing a long polyether chain and two oleate imidazoline structures into the matrix of cyanogen chloride.The corrosion inhibition of Q235 steel in 1 mol/L hydrochloric acid was tested by weight loss method,electrochemical technique,contact angle measurement and atomic force microscope(AFM).The corrosion inhibition mechanism was analyzed.The results showed that IPT had excellent corrosion inhibition effect on Q235 steel in 1 mol/L hydrochloric acid,and the corrosion inhibition rate of IPT(100 mg/L)at 30℃could reach 97.90%.Even at 70℃,IPT could still exhibit stable adsorption on the surface of Q235 steel,with a corrosion inhibition rate of 97.15%.Compared with the traditional imidazoline corrosion inhibitor,IPT maintained good corrosion inhibition effect,and significantly improved the problem of poor solubility.