Pour a glass of water. Drop in a copper coin. Leave it for a week. You’ll get a dark coin and some green sludge. That’s not rust. That’s copper being its glorious, protective self.
If you want rust, you need iron. Go find an old nail and leave it in the rain. That thing will crumble like a cookie. Copper? It’ll just get a nice tan.
Rhetorical question time: Would you rather have a roof that flakes away or one that turns beautiful with time? Exactly. Copper wins.
One last thing: Don’t confuse patina with corrosion. Corrosion is destruction. Patina is a makeover. Copper in water picks the makeover every time. It’s like metal skincare, honestly.
So next time someone says, “Does copper rust in water?” you can look them in the eye, take a sip of your coffee, and say, “Nope. It just gets cooler.” And then you can point at the Statue of Liberty and feel like a genius.
