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Problem: plating on zinc die cast



 

My plater faced problem, plating on the zinc die cast part (ZDC2). The part is casted by Dynacast proprietary 4-slider machine at 30 cycles/minute. The part is rather thin with basic thickness = 1.7mm & some core in area 0.5mm. The footprint is diameter 25mm. The processing is casting, degate, shot blast, machining (mirror finish on logo area) then plating. The part is semi- matte Cu/Ni/Cr plated with mirror finishing on the logo area.

The problem are:

a) dirty-liked stain on the basic surface
b) white patches on the mirror surface of the logo area
c) inconsistent of finishing, some times too matte and shining.

Wong Weng Fei
- Butterworth, Penang, Malaysia



Get some brass or copper coupons, and try to plate them with your plating line. Are some of the same problems occurring on the coupons?

tom & pooky   toms signature
Tom Pullizzi
Falls Township, Pennsylvania




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