Letter 9093

Cast Iron-Plating-Stain in machined part 

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Hi,

We are doing Zinc Plating on Iron Casting.(Potasium Chloride Bath).The component is machined after plating. After 4 to 5 hrs of machining stain marks develop from the plating edges and moves inside the machined area.We had been plating the same component for the past 1 year without this problem.

Trials conducted:

1)Fresh plating soln prepared
2)Plating solution of another company tried out
3)Electrolytic cleaning included.

Any suggestions would highly be appreciated.

Thanks,

Rajesh Kumar
- India

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