Phosphating 磷化
The final recirculated D.I. water rinse should be maintained below 100 micromhos to prevent contamination of the paint bath by carry-in of phosphate chemicals. The exterior surface should be thoroughly rinsed with fresh D.I. water below 25 micromhos to assure a uniform surface conductivity on the body and to dilute the recirculated rinse. Phosphated bodies should frequently be examined to assure that they:
进行最后的循环去离子水冲洗时,其电导率要维持在100 μs/cm以下,已将由于带入有害磷化药品导致漆液污染的机会减少到最低限度。车身外表面要用低于25μs/cm的新鲜去离子水彻底冲洗以确保车身表面电导率均一,并稀释循环冲洗液。磷化后的车身要经常检查以确保:
Are free of metal filings,
无金属屑
Have minimal residual stamping oil, and
极微的残留冲压油
Have phosphate coatings of proper weight which are free of blemishes or patterns.
磷化膜重适当,无污点或花纹