Notes

Analysis of Peeled-off trouble for Electro-plating and Powder finishing parts
1. Reasons bring about plating layers peeled and safety nets for Electro-plating components:
Stainless steel Investment Casting
1) The crucial to accomplishing great attachment is to ensure an active metal surface completely devoid of oils, oxides, alloying inclusions or heat reward scale. If pretreatment is not well done, the contaminations remained on metal surface area will certainly weak the attachment.
Preventive measures: check every set to ensure the elimination of oil is detailed, the cleaning water is tidy, the concentration of acid leaching remedy is hefty as required and the etching time is enough.
2) It may be that the interruption of the present in the electroplating procedure creates the poor mix between the nickel layer as well as item, and also this present disturbance sensation may be triggered by the poor conductivity of the hanging tool.
Valve Seat
Safety nets: day-to-day check the hanging tools to see to it there is no damages.
3) When the brightener is added way too much, the bonding force between layering layers is bad.
Preventive measures: day-to-day check the electro-plating solution including brightener to be made according to standards.
4) PH value, electric present, temperature level can additionally be the reasons.
Safety nets: daily check the electro-plating solution and also plating tools.
2. Reasons bring about incomplete and also peeled-off coating as well as safety nets for Powder covered parts:
1) Incomplete covering:
If the finishing line is automated, maybe the reasons that the rotating rate of hanging gadgets and also distance between components and blowguns are also far or as well close. The tiny settings inside the cavity can not be entirely covered with layer powder.
If the finish line is hand-operated, workers really did not carry out a competent job.
Safety nets: For automated coating line, set up the correct rotating rate of hanging distance in between parts and blowguns. For hands-on line, train the employees to work more careful and also inspect every piece.
2) Peeled-off finishing:
Mains reasons could be Pretreatment inadequate, Drying time as well short or temperature level too reduced.
Preventive measures: Pretreatment to eliminate the contaminations have to be complete, such as oil, lubricating substance, oxides, alloying inclusions or heat reward range.

Stainless steel Casting
Lengthen the drying out time or set up a greater drying out temperature level according to work direction.


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