酸化缓蚀剂含羟基双季铵盐的合成及性能评价

Synthesis and Property Evaluation of Hydroxyl Containing Diquaternary Ammonium Salt as Acidification Corrosion Inhibitor

根据季铵化反应原理,以喹啉和1,3-二氯-2-丙醇合成了一种含羟基双季铵盐酸化缓蚀剂(BQ-1)。用红外光谱对其结构进行了表征,采用静态失重法和电化学测试研究了该缓蚀剂在15%HCl溶液中对N80钢的缓蚀性能。结果表明,该缓蚀剂具有明显的腐蚀抑制能力,在15%HCl、90℃下,5mmol/L该缓蚀剂对N80钢片的缓蚀率达96%以上,缓蚀性能优良;此外,该缓蚀剂是一种混合型缓蚀剂,在N80钢片表面的吸附作用符合Langmuir等温吸附规律。表面分析试验(SEM和EDS)验证了缓蚀剂分子在N80钢片表面确实形成了一层保护膜。

Quinoline and 1,3-dichloro-2-propanol were used as raw materials to synthesize a novel hydroxyl containing diquaternary ammonium salt（BQ-1）as acidification corrosion inhibitor by quaternization.The synthesized compound was characterized by IR spectrum.Besides,a comprehensive evaluation on corrosion inhibition effect of BQ-1for N80 steel in 15% HCl solution was carried out by electrochemical test and mass loss measurements.The results indicated that BQ-1had an excellent corrosion inhibition effect and its inhibition efficiency for N80 steel in15% HCl solution at 90 ℃ could reach up to 96% at the concentration of 5 mmol/L.BQ-1was also a mixed type inhibitors.Furthermore,the adsorption of the inhibitor on N80 steel surface conformed with the Langmuir adsorption isotherm equation.A protective film was formed on the surface of N80 steel which confirmed by surface analysis experiments（SEM and EDS）.