When it comes to metal—be it a copper pan or an antique made from bronze—differentiating between a patina, tarnish, and rust ...

Copper pipe corrosion is the leading cause of leaks and pinholes in copper water pipes. Copper is naturally resistant to rust ...

locks and doorknobs Bronze (alloy of copper, aluminium and/or nickel) Non-ferrous alloy, harder than brass and corrosion resistant, reddish/yellow in colour Castings, bearings Stainless steel ...