Notes

Evaluation of Peeled-off problem for Electro-plating as well as Powder layer components
1. Reasons result in layering layers peeled off as well as safety nets for Electro-plating components:
Stainless steel Casting
1) The key to accomplishing good bond is to make sure an active metal surface area sufficiently void of oils, oxides, alloying additions or warmth reward range. If pretreatment is not well done, the contaminations remained on metal surface will weak the bond.
Preventive measures: check every batch to see to it the elimination of oil is thorough, the cleansing water is clean, the focus of acid leaching remedy is heavy as required and the etching time suffices.
2) It may be that the interruption of the present in the electroplating process creates the poor combination between the nickel layer and also item, and also this existing disturbance phenomenon might be brought on by the inadequate conductivity of the hanging tool.
Safety nets: everyday check the hanging devices to ensure there is no damages.
3) When the brightener is added excessive, the bonding force in between plating layers is not good.
Preventive measures: everyday check the electro-plating option including brightener to be made according to requirements.
4) PH value, electrical present, temperature could also be the reasons.
Safety nets: day-to-day check the electro-plating remedy and also plating equipment.
2. Reasons result in insufficient and peeled-off covering and also preventive measures for Powder coated parts:
1) Incomplete layer:
Hose Fitting
If the finishing line is automated, it could be the causes that the turning speed of hanging gadgets as well as distance in between parts and blowguns are too far or too close. The tiny settings inside the tooth cavity can not be entirely covered with finishing powder.
If the finish line is hands-on, workers didn't execute a competent job.
Preventive measures: For automated finishing line, established the proper turning speed of hanging distance between components and also blowguns. For manual line, train the employees to function even more careful and also check every piece.
air blow gun
2) Peeled-off coating:
Keys causes could be Pretreatment inadequate, Drying time also brief or temperature level as well reduced.
Preventive measures: Pretreatment to remove the contaminations need to be detailed, such as oil, lube, oxides, alloying incorporations or warm treat scale.

Extend the drying time or set up a higher drying temperature according to work instruction.


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