Notes

Evaluation of Peeled-off issue for Electro-plating and also Powder coating parts
1. Reasons result in plating layers peeled off and also safety nets for Electro-plating components:

1) The essential to achieving great adhesion is to make certain an energetic metal surface sufficiently devoid of oils, oxides, alloying inclusions or warm reward scale. If pretreatment is not well done, the contaminations remained on metal surface will weak the attachment.

Safety nets: examine every set to ensure the elimination of oil is extensive, the cleansing water is tidy, the focus of acid leaching solution is heavy as needed as well as the etching time is enough.

2) It might be that the disturbance of the present in the electroplating process causes the poor combination in between the nickel layer as well as item, and also this present disruption sensation might be caused by the bad conductivity of the hanging gadget.

Safety nets: everyday check the hanging tools to make certain there is no damage.

3) When the brightener is added excessive, the bonding force in between plating layers is bad.

Preventive measures: everyday check the electro-plating service including brightener to be made according to requirements.

4) PH value, electrical existing, temperature can also be the causes.

Safety nets: everyday check the electro-plating solution as well as plating equipment.

2. Reasons bring about incomplete as well as peeled-off covering and preventive measures for Powder layered components:


1) Incomplete covering:

If the coating line is automated, maybe the reasons that the turning speed of hanging gadgets and also range between components and also blowguns are as well far or too close. The tiny positions inside the cavity can not be completely covered with finish powder.

If the finish line is hands-on, employees didn't perform a professional job.

Safety nets: For automatic finish line, established the proper turning rate of hanging distance between components and blowguns. For manual line, educate the workers to work more mindful as well as check every piece.

2) Peeled-off finish:

Mains reasons could be Pretreatment inadequate, Drying time too brief or temperature also low.

Preventive measures: Pretreatment to eliminate the contaminations should be complete, such as oil, lubricating substance, oxides, alloying inclusions or heat reward scale.
Prolong the drying out time or set up a higher drying temperature according to work guideline.
Stainless steel Casting

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