Evaluation of Peeled-off problem for Electro-plating and Powder layer parts
1. Causes bring about plating layers removed and safety nets for Electro-plating parts:
1) The crucial to attaining good bond is to make certain an active metal surface area completely void of oils, oxides, alloying incorporations or heat reward range. If pretreatment is not well done, the contaminations remained on metal surface will weak the attachment.
Preventive measures: examine every batch to see to it the elimination of oil is extensive, the cleansing water is clean, the concentration of acid leaching solution is hefty as required and the etching time suffices.
2) It might be that the interruption of the existing in the electroplating process causes the bad mix in between the nickel layer and also item, and also this existing disruption sensation may be caused by the bad conductivity of the hanging tool.
Safety nets: daily check the hanging gadgets to make certain there is no damage.
3) When the brightener is included way too much, the bonding pressure in between plating layers is bad.
Preventive measures: daily check the electro-plating option consisting of brightener to be made according to requirements.
4) PH worth, electrical present, temperature could likewise be the reasons.
Preventive measures: daily check the electro-plating service as well as plating equipment.
2. Causes bring about incomplete and peeled-off layer and safety nets for Powder covered parts:
1) Incomplete finishing:
If the layer line is automated, it could be the causes that the turning speed of hanging devices as well as distance in between parts and also blowguns are as well far or also close. The little placements inside the tooth cavity can not be completely covered with coating powder.
If the finishing line is hand-operated, employees really did not carry out a professional work.
Preventive measures: For automated finish line, set up the proper revolving speed of hanging distance in between components as well as blowguns. For manual line, train the workers to work more cautious and check every piece.
2) Peeled-off finish:
Keys causes could be Pretreatment insufficient, Drying time too brief or temperature level also reduced.
Safety nets: Pretreatment to eliminate the contaminations need to be complete, such as oil, lube, oxides, alloying additions or heat reward range.
Lengthen the drying out time or set up a higher drying temperature level according to function instruction.