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Zamac with high porosity; process is not able to cover the pores

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adv.
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Q. What can I do if my process does not manage to cover all the porosity of the ZAMAK part? My process includes two cyanide copper baths (strike and plate) and a satin nickel.

Luis Aguilar Sario
- Tijuana, Mexico
October 3, 2025


A. Hi Luis.

Sorry, but I can't offer much encouragement. Zamak parts need to be non-porous and free of cold shuts ⇦ huh?. If you can't get quality diecastings I think you would need to vacuum impregnate them before plating.

You won't appreciate the humor at this point, but thread 323/05 relates my experience with a fellow in the position of desperately needing to plate unplateable castings.

Luck & Regards,

ted_yosem
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.




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