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Comment by echoangle

2 days ago

It also helps that they are made from aluminum which doesn’t rust like iron does.

It rusts just like iron, but the rust (AlOx, or alumina) stays bonded to the metal and actually protects it.

  • Rust being literal Fe2O3 makes a convincing argument that aluminium sure oxidises but doesn't rust pretty much by definition ;)

  • In other words: it rusts, but it doesn't rust like iron. It rusts in a much less destructive way because the aluminum oxide protects the rest of the aluminum from oxygen

And epoxy binds to aluminum just fine ? Epoxy is weird. What solid material does it NOT bond to ?