plating, anodizing, & finishing Q&As since 1989
Stripping electroplated zinc from copper
I need to strip some zinc from a copper contact so I can check the copper part for cracking. I just have a few pieces to do. Whats the best way to do this? Can I remove it with an acid, or reverse plate it off?Rick Fischer
Dilute hydrochloric acid at room temperature should do the job. You can buy concentrated hydrochloric acid 20 degrees baumé at the hardware store for about $5/gallon under the name muriatic acid [affil link] (used to clean bricks). Try a small sample piece first. Also limit the time the product is in the acid and rinse fully.
Hot Springs, So. Dakota
Ed. note: Low cost of living out there in So. Dakota. People keep quoting "about $5/gal" but my hardware store wants about $5 for a pint :-)
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