3-丁基5，5-二甲基海因咪唑季铵盐的 合成及缓蚀性能

Synthesis and Corrosion Inhibition of 3-butyl-5,5-dimethyhydantoin Imidazole Ammonium Salt

摘要:

合成了一种化合物3-丁基-5，5-二甲基海因咪唑季铵盐(BDMHI)，产物结构通过傅里叶红外光谱（FTIR）、核磁共振氢谱（1HNMR）、核磁共振碳谱（13CNMR）得到了分析验证；采用失重法、极化曲线法、交流阻抗法、原子力显微镜等研究了BDMHI在6%HCl腐蚀介质中对Q235钢的缓蚀性能，并探讨了其在Q235碳钢表面的吸附行为。结果显示，BDMHI能同时抑制Q235钢腐蚀的阴、阳极反应过程，缓蚀效率随BDMHI浓度增加而增大，最高缓蚀效率可达91.25%。缓蚀剂在Q235钢金属表面的吸附符合Langmuir 吸附等温式，属于以化学吸附为主的混合吸附。

Abstract:

3- butyl -5,5-dimethylhydantoin Ammonium Salt (BDMH)was Synthesized. The product was separated and purified by column chromatography and thin layer chromatography. The structure of BDMHI were characterized by Fourier transform infrared spectroscopy (FTIR), H- nuclear magnetic resonance spectrum (1HNMR), C- nuclear magnetic resonances spectrum (13CNMR). The corrosion inhibition performance and adsorption behavior of BDMHI for Q235 steel in 6% HCl solution were investigated using weight loss measurements, polarization cure , electrochemical impedance spectroscopy(EIS) methods and AFM. The results showed that BDMHI had excellent corrosion inhibition performance, and both cathodic and anodic processes of Q235 steel corrosion were suppressed. Inhibition efficiency increased with the increase of concentration, and The highest inhibition efficiency was 91.25%. We found that the adsorption of BDMHI on Q235 steel could be fitted to a Langmuir isotherm equation, and it belonged to a mix-type adsorption, which was mainly dominated by chemisorption.