What acid is used to clean copper?

Reviving your copper: The best household acids for the job

Over time, copper items like pots, pans, and decorative pieces develop a dull, dark patina or tarnish. While some people love that vintage look, others prefer the bright, gleaming shine of brand-new metal. Fortunately, you do not need expensive commercial polishes to restore your items; the best solutions are likely already sitting in your kitchen or utility closet.

Common household acids like acetic acid (found in everyday vinegar) and citric acid (abundant in fresh lemons) work wonders on tarnish. When combined with a little salt, these mild acids break down copper oxide quickly and safely. For tougher grime, industrial residues, or specialized restoration, stronger compounds like acetone or hydrochloric acid are sometimes utilized, though they demand much more caution and protective equipment.

Cleaning your copper at home is straightforward: apply your chosen natural acid solution, let it sit for a few minutes to lift the oxidation, gently scrub away the loosened tarnish, and rinse thoroughly with warm water. Finish with a quick buffing using a soft microfiber cloth, and your copper will look brilliant once again.