缓速酸用缓蚀剂的研究

Study of New Corrosion Inhibitor for Retarded Acid

缓速酸用缓蚀剂由乌洛托品、咪唑啉季铵盐、OP-10组成,利用复配产生的协同效应,抑制和减缓缓速酸对金属的腐蚀速率。利用正交试验确定了最佳的复配比:缓蚀剂用量占缓速酸用量的0．5％,咪唑啉与OP-10质量比为2．0:1．0,乌洛托品与OP-10质量比为0．5:1．0。含有此配方的缓蚀剂对N-80钢试片的腐蚀速率为0．3329 g／(m2·h),远远低于行业标准。

The entitled new corrosion inhibitor was composed of hexamethylenamine, quatemary ammonium bisimidazoline, and OP- 10. It had synergetic effect after compounding and could inhibit the corrosion of retarded acid to the metal. The optimum compositions were determined using orthogonal test as follows：the content of corrosion inhibitor 0.5 % （based on the mass of retarded acid）, the mass ratio of quaternary ammonium bisimidazoline to OP- 10 2.0： 1.0, the mass ratio of hexamethylenamine to OP - 10 0.5： 1.0. The corrosion inhibitor developed had corrosion rate of 0. 332 9 g/（ m^2· h） to steel piece which was much lower than the industrial standard.