For a definitive test for cadmium, one could use this.

But I'm pretty confident in my hydrochloric acid test. Zinc is highly reactive in the acid, and per the video I posted, cadmium is not nearly as reactive.

I can't say that some hinges and other hardware were not cadmium plated, but I can say with confidence that my original hinges were zinc plated.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.