一种β氨基酮缓蚀剂的合成及缓蚀性能

Preparation and Corrosion Inhibition Performance of a kind of β Amino Ketone Corrosion Inhibitor

以乙醇胺、甲醛和环己酮为原料合成了一种缓蚀剂,通过五因素四水平的正交法对合成条件进行了优化,最佳合成条件是:反应温度60℃,pH=1,反应时间为3h,醛/胺摩尔比为1.0,酮/胺摩尔比为1.3。此条件下合成的缓蚀剂,其用量为1%时,能使60℃下15%盐酸中的N80钢的腐蚀速率降至1.5521g·m^(-2)·h^(-1)。失重法研究表明,30～60℃范围内,该缓蚀剂对N80钢的缓蚀率均能达到90%以上。缓蚀剂在N80钢表面的吸附符合Langmuir吸附模型,温度越高,偏离吸附模型的程度越大。缓蚀剂对N80钢在盐酸中的缓蚀效果随时间的增加而先增加后减小。电化学研究表明,该缓蚀剂属于阳极控制型为主的混合型缓蚀剂,对腐蚀反应的阴极和阳极均有抑制作用。

A kind of corrosion inhibitor was synthesized with ethanolamine, formaldehyde and cyclohexanone. The synthesis conditions were optimized by five-factor four-level orthogonal experiment. The optimal synthesis conditions were as followed： reaction temperature 60℃ , pH=1, the reaction time was 3 h, the aldehyde/amine molar ratio was 1.0, and the ketone/amine molar ratio was 1.3. When the amount of corrosion inhibitor synthesized under these conditions was 1%, it could reduce the corrosion rate of N80 steel in 15% hydrochloric acid at 60℃ to 1.5521 g/m2/h. The weight loss method showed that the corrosion inhibition rate of the corrosion inhibitor on N80 steel could reach more than 90% in the range of 30~60℃ . The adsorption of corrosion inhibitor on the surface of N80 steel conformed to the Langmuir adsorption model. The higher the temperature, the greater the deviation from the adsorption model. The corrosion inhibition effect of corrosion inhibitor on N80 steel in hydrochloric acid increased first and then decreased. Electrochemical studies showed that the corrosion inhibitor belonged to the anode-controlled mixed corrosion inhibitor, which had inhibitory effects on the cathode and anode of the corrosion reaction.