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为了提高汽车的防腐性能与外观质量,除了对油漆材料的性能和施工要求很高外,对漆前处理的要求同样也极为严格,特别强调采用磷化处理。为了与电泳涂漆有良好的配套性,还要求用薄型磷化。为满足磷化要求,必须非常注重磷化前的预处理,因为高温和强碱脱脂使钢铁表面的磷化活性点转变成氧化物和氢氧化物,使构成磷化膜的结晶晶核减少,而利于结晶生
In order to improve the car’s corrosion resistance and appearance quality, in addition to the performance of paint materials and construction requirements are high, the pre-treatment requirements are also very strict, with particular emphasis on the use of phosphating. In order to have good compatibility with electrophoretic paint, but also requires thin-type phosphating. In order to meet the requirements of phosphating, we must pay great attention to the pre-phosphating pretreatment, because the high temperature and strong alkali degreasing the phosphating activity of the steel surface into oxides and hydroxides, the crystal nuclei to form a phosphate film to reduce, And conducive to crystal students