以硫酸铜点滴试验作为检验的方法, 通过正交试验来确定“四合一”磷化液的组成。经过一系列的探究试验之后, 得到“四合一”磷化液组分如下: 硝酸镍5 g/L、氧化锌12 g/L、磷酸300 mL/L、硝酸锌27 g/L、氟化钠5 g/L、复配表面活性剂11 g/L、酒石酸4 g/L、柠檬酸1 g/L、硫脲1 g/L。该磷化液能够很好地去除钢铁表面上的锈迹及油污, 所形成的磷化膜致密均匀、耐腐蚀效果好。通过对市场流通的同类产品大量调查研究, 将此磷化液与同类产品作对比得到, 它在相同指标的情况下各方面性能皆优于同类产品。

By orthogonal experiment to determine the main ingredient of the “4 in 1” phosphate solution, and with copper sulfate drip experiments to test it. The optimal composition of the “4 in 1” phosphate solution was obtained as follows through orthogonal test: Ni(NO3)2 5 g/L, ZnO 12 g/L, H3PO4 300 mL/L, Zn(NO3)2 27 g/L, NaF 5 g/L, a surfactant compound 11 g/L, tartaric acid 4 g/L, citric acid 1 g/L, thiourea 1 g/L. The phosphate solution can well remove rust and oil on the steel surface. Compact and uniform phosphate coating , and has good corrosion resistance. Through the circulation of similar products on the market a lot of research, this phosphate solution obtained for comparison with similar products, it is the same in the case of all aspects of performance indicators are better than similar products.