Cu-Sn alloy coating with different Sn content can be replacement plating out on iron and steel surface in a solution comprising of copper sulfate, stanous sulfate, complexant and stabilization agent.
Bronze, an alloy of copper and tin, is much harder and cuts much better than copper or gold, and once discovered, it was widely used to make tools and weapons for over a thousand years.
Hagrid wouldn't let Harry buy a solid gold cauldron, either (" It says pewter on yer list" ), but they got a nice set of scales for weighing potion ingredients and a collapsible brass telescope.
A former Mexican law enforcement official once in charge of his country's fight against drug traffickers was convicted on Tuesday on US charges that he took millions of dollars in bribes from the infamous Sinaloa cartel.