Summary for plastisol on zinc plated parts Discussion
Plastisol on zinc plated parts is the central concern here: the question asks how to cure plastisol on zinc-plated, chromate/passivated parts without heat damaging the chromate. The excerpt shown does not include any reply or recommended procedure, so no specific curing method or temperature guidance is provided in the source. The only named contributor visible is Ted Mooney, P.E., RET, who appears as the site contact rather than as an answerer in the excerpt. Because the thread text is incomplete, the safest takeaway is that the question is about balancing plastisol cure requirements against the risk of degrading the chromate/passivation layer, but the source excerpt does not supply a final solution.
Q. My question is, what is the procedure for curing plastisol on zinc plated & chromate/passivated parts? My concern is heat during curing destroying the chromate.
For example where plastisol is used on handles for tools or levers on latches, etc.
joshua gonsalves
small business – port of spain
December 27, 2024
A. Hi Joshua
Zinc phosphatization or zinc plating plus zinc phosphating is probably a better base for plastisol than zinc plating plus chromating, but I can see that this may not be practical for the case at hand.
A primer is required before plastisol in any case.
I think zinc plating plus chromating, with a 24 hour cure time, followed by priming followed by plastisol and baking should work okay. There are “air dry” plastisols but they probably are not quite as good as oven-cured versions.
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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