Cathodic electrophoresis process, seemingly simple and roughly the same, but there are subtle differences because of different metal material, production capacity and other factors, So how do you choose when you're in production?
The current common processing for general metal surface electrophoresis coating, : hanging - oil removal - water washing - rust removal - water washing - neutralization - water washing - phosphating - water washing - passivation - electrophoresis - water washing - drying - offline
But different materials, electrophoresis process is also different. For example, the cathode iron phosphating electrophoretic paint white/solid color and color process is: hanging - ultrasonic oil removal - tap water washing * 2 - electric oil removal - tap water washing * 3 - acid neutralization - tap water washing * 2 -surface activation* 2 - phosphating (silane or zirconation) - tap water wash * 2 - pure water spray - ultrasonic hot water wash - pure water wash * 2 - electrophoresis - pure water wash - pure water spray - pure water wash * 2 - dehydration wash - baking - hanging.
The same white/color/transparent process, stainless steel material workpiece electrophoresis process is as follows: Hang - ultrasonic oil removal - tap water wash * 2 - electric oil removal - tap water wash * 3 - acid neutralization - tap water wash * 2 - surface activation * 2 - phosphating (silane or zirconate) -pure water spray - ultrasonic hot pure water wash – pure water wash * 2 - electrophoresis – pure water wash - spray – pure water wash * 2 - dehydration wash - baking - hanging.
Apparently, there’s one more surface activation when workpieces are in phosphating
In addition, if the color of cathodic electrophoretic paint is not the same, then the process may also be different. Generally speaking, in addition to the conventional process , the color of imitation Antique brass and Antique copper still need black, drawing two procedures. blowing process can be added after the removal of oil for porous parts and gap parts , so as to avoid the gap or hole water affect the quality when parts go into the next process, and then affect the electrophoretic coating quality
In general, the cathodic electrophoretic paint will have different technological process because of material of workpiece, the different color, size and production capacity. The choice of technological process is related to the coating quality, and greater impact on the cost . So as far as possible choose directed, perfect processing effect and cost surface treatment process when starting to make the flow chart. In general, those meet the following conditions can be considered:
1.The selected process can meet the above conditions;
2.Meeting the material, color, production capacity and other performance requirements of the workpiece;
3. Can form flow operation with coating line to improve its automation;
4. Safe, less pollution, strong operability;
5. Best of all, invite professional electrophoresis industry technical experts to formulate.