水基切割液防锈剂的复配及其防锈效果

水基切割液钼酸盐防锈剂防锈效率低、对电导率影响大。以油酸、二乙烯三胺合成咪唑啉,经烷基化合成水溶性咪唑啉季铵盐,并与钼酸铵、葡萄糖酸钙一起复配成水基切割液防锈剂。采用电导率仪和电化学方法分析了水基切割液的电导率和腐蚀参数。结果表明:水溶性咪唑林季铵盐和钼酸铵起主防锈作用,葡萄糖酸钙起协同作用;钼酸铵含量对水基切割液电导率的影响最大;水基切割液的最优配比为1 000.0(水基切割液)∶2.0(水溶性咪唑季铵盐)∶1.0(钼酸铵)∶0.1(葡萄糖酸钙);水基切割液呈黄色;45钢在含防锈剂水基切割液中的腐蚀速率为0.240 9 mm/a,缓蚀效率达77.58%,电导率仅增加13.00%。

Preparation of Antirust Agent of Water-Based Cutting Fluid and Evaluation of Its Antirust Performance

Oleic acid and diethylenetriamine were used as the starting materials to synthesize imidazoline.As-synthesized imidazoline was then converted to water-soluble quaternary ammonium salt of imidazoline via alkylation.As-obtained water-soluble quaternary ammonium salt of imidazoline was then mixed with ammonium molybdate and calcium gluconate to yield antirust agent for water-based cutting fluid.The conductivity and corrosion parameters of the cutting fluid containing antirust agent were measured using a conductivity meter and an electrochemical test rig.It was found that quaternary ammonium salt of imidazoline and ammonium molybdate were the major antirust components,and calcium gluconate had synergistic antirust effect,while the content of ammonium molybdate had the greatest impact on the conductivity of the cutting fluid.The optimal composition(mass ratio of water-based cutting fluid,water soluble quaternary ammonium salt of imidazoline,ammonium molybdate,and calcium gluconate) of the cutting fluid was suggested as 1 000.0∶2.0∶1.0∶0.1,and cutting fluid was yellow.The corrosion rate of 45 steel in as-formulated cutting fluid was 0.240 9 mm/a,corresponding to an inhibition efficiency of 77.58%,while the electrical conductivity was increased by only 13.00%.