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一、钢铁件涂漆前磷化膜的要求磷化是常用的表面处理方法,被广泛用一于防护、抗磨损、电绝缘、润滑等,作为这类目的的磷化膜一般比较厚,结晶也较粗,膜重都在7.5g/M~2以上。磷化膜还常作为油漆的底层,以增加漆膜与金属的结合力,提高防护性能。此类磷化膜要求结晶细密且要薄。用于涂漆的磷化膜,单位重量一般不超过
First, the requirements of the phosphating film before painting steel parts Phosphating is a commonly used surface treatment methods, is widely used in a protective, anti-wear, electrical insulation, lubrication, etc., as the purpose of this type of phosphate film generally thicker, Crystallization is also coarser, the membrane weight is 7.5g / M ~ 2 or more. Phosphating film is also often used as the bottom of the paint to increase the binding force of the paint film and metal to improve the protective performance. Such phosphate coating requires fine and thin crystals. Phosphate coating for paint, the unit weight is generally not more than