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研制了一种用于钢铁构件涂层制备的预处理综合亮化液,集除油、除锈、磷化、钝化为一体,具有高效环保、成本低廉等特点,可在常温下擦拭或浸渍钢铁表面。实验通过单因素和正交实验方案确定了亮化液组分,其中不含有F-,NO2-和Cr3+等毒性离子。通过光学显微镜观察了磷化膜形貌,并测试了亮化液总酸度点、游离酸度点、耐蚀性等。结果表明:用该亮化液处理试样后表面形成的磷化膜薄而致密均匀,耐蚀性好,可直接用于涂层的制备。
A pretreatment integrated brightening liquid for the preparation of coating of steel components was developed, which combines oil removal, rust removal, phosphating and passivation, has the characteristics of high efficiency and environmental friendliness, low cost and the like, and can be wiped or impregnated at room temperature Steel surface. Experiments through the single factor and orthogonal experiment program to determine the brightener component, which does not contain F-, NO2- and Cr3 + and other toxic ions. The morphology of phosphating film was observed by optical microscope and the total acidity point, free acidity point, corrosion resistance and so on of the brightening solution were tested. The results show that the phosphating film formed on the surface of the sample after being treated with the brightening solution has the advantages of thin and uniform density, good corrosion resistance and can be directly used for the preparation of the coating.