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topic 6765

Matching Stainless Steel finish in Zinc Die Cast and Plastic Parts



Can anybody suggest ways of finishing zinc die-cast parts to match the stainless steel finish?

Can you recommend anybody who can do it?

Also, Is there a way of finishing plastic injection molded parts to look like stainless steel?

Who can do it?

The parts are approximately 4.75" x 4.0" x2.25". Annual production volumes are 10,000 to 200,000 parts.

Thank you

Igor Haskin
- Des Plaines, Illinois, USA



Concerning zinc die cast parts. Not sure exactly what you are looking for.
1. Die cast parts need to be deburred first. This can be done with a couple of different types of media depending on cost and/or speed.
2. Using mass finishing systems, any surface finish can achieved; however, it will never look exactly like stainless steel unless you are talking about a mirror finish, which is possible.

Your question about plastics is similar. Again, you can achieve an extremely smooth surface, but what you do afterward, I am not sure.

tony kenton
AF Kenton
Hatboro, Pennsylvania


I am assuming that your zinc die-cast parts are for decoration (otherwise giving them the appearance of stainless steel serves very little purpose). Your parts must first be pre-polished or grained to look like either satin chrome or satin nickel; a slight bead blasting will give you a similar result. After pre-polishing or blasting, the parts have to be copper plated (copper strike), nickel plated, dull nickel plated and then chrome plated. A good metal plating shop that does decorative plating can advise you; it would help a great deal if you have a sample of the finish you are trying to attain.

Gary Patigler
- Richmond California USA

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