选用非离子表面活性剂平平加-O溶液作为合成反应的溶剂，喹啉和卤代烃经季铵化反应合成一种喹啉季铵盐酸化缓蚀剂OL-1。借助红外光谱仪对合成产物结构进行了表征，并采用静态失重法和电化学极化曲线和电化学阻抗法对药剂QL-1进行了缓蚀性能评价及电化学机理分析。红外光谱分析证明了该产物分子结构符合预先设定结构。静态失重法结果表明，随着该缓蚀剂浓度的增加，P1l0钢试片在15％和20％盐酸溶液中的腐蚀速率随之减小；随腐蚀时问的延长和腐蚀温度的升高，P1l0钢试片在盐酸溶液中的腐蚀速率均逐渐增大。电化学交流阻抗谱和极化曲线结果表明，该缓蚀剂在Pll0钢表面形成了明显的保护性膜，并且是一种以抑制阴极反应过程为主、作用机理属于“负催化效应”的混合型缓蚀剂。
Using peregal-O solution as the solvent, a new quinoline quaternary ammonium acidification inhibitor was synthesized by quaternization of quinoline and alkyl halides. The synthesized inhibitor QL-1 were characterized with infrared spectrometer, static weight loss and electrochemical polarization curves and EIS for the performance evaluation and electrochemical corrosion mechanism analysis. Infrared spectroscopy proved that the products met the pre-set structure of the molecular structure. The static weight loss method results show that with concentration of the inhibitor increasing, the corrosion rate of Pll0 steel specimens in 15% and 20% hydrochloric acid decreased; with the increase of corrosion time and temperature the corrosion rate of Pll0 steel specimen in hydrochloric acid increased. Electrochemical impedance spectroscopy and polarization curves results show that the corrosion inhibitor formed a protective film on the surface of the steel, and suppressed the cathodic reaction. The action mechanism is a ＂negative catalytic effect ＂ of the mixed inhibitor.
参考文献
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