Resistance to corrosion, yes. Corrosion proof - 100% no.
Iron oxide - rust, brown and flaky.
Aluminium oxide - hard and white bubbles.
Bear in mind, it isn't pure aluminium, it is an alloy, so may not actually be the aluminium that is reacting....
I've seen it start as a tiny spot but also grow across a panel to be a huge "bubble". Unlike steel, I have never seen a hole form!? Which kinda defeats the 12 year perforation warranty......
|