Steel window electrostatic powder coating process

in recent years, steel window electrostatic powder spraying is becoming more and more common, in order to ensure the quality of spraying, we must choose a reasonable spraying process, pay attention to the operation methodspraying process
1 process
pre-treatment, phosphorization, drying, lifting, spraying, inspection, curing, cooling, inspection, storage2 pretreatment(1) oil removal powder coating on the pre-treatment requirements are very strict, it is the key process to improve the quality of coating filmOnly by completely removing the oil and rust from the surface, and achieving a smooth, scratch-free, no burrs, no obvious welding points, can the appearance and quality of the coating film be guaranteedThe steel window is made of hot-rolled steel parts, and its surface oxide skin is thick, and only hydrochloric acid rust removal effect is not goodTo this end, mechanical rust removal method can be used to remove 80% of the oxide skin, so that the surface defects are reduced(2) phosphating practice shows that, after the removal of oil and rust directly sprayed, its coating film moisture resistance is poor, adhesion is not good, the product will be seriously rusted for 1 yearTherefore, phosphating must be performedIn this regard, the current use of "four-in-one" method, from the use of the situation, "four-in-one" method of phosphorization is best to warm 30-40 degrees C, in order to speed up the rate of phosphatingsteel windows after phosphorus do not wash, take natural drying or heating 60-80 degrees C drying, so that the surface of the ferro-iron ions and residual acid will continue to react to form a phosphecified film