this post was submitted on 05 May 2024
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[–] Sam_Bass@lemmy.world 31 points 7 months ago (5 children)

Aluminum "rusts" as well. White rust. Aluminum oxide.

[–] SkaveRat@discuss.tchncs.de 29 points 7 months ago (2 children)

in fact, it rusts so fast, that it's pretty much impossible to get a "clean" aluminium surface while oxygen is around

[–] Maalus@lemmy.world 2 points 7 months ago

They had to invent an entirely new style of welding to weld it correctly because it rusts so much you can't even melt it for welding reliably.

[–] Sam_Bass@lemmy.world 0 points 7 months ago (1 children)
[–] EddoWagt@feddit.nl 5 points 7 months ago (1 children)
[–] Sam_Bass@lemmy.world 3 points 7 months ago

Yeah. Shame we cant live in a vacuum

[–] Buddahriffic@lemmy.world 14 points 7 months ago (1 children)

And if you combine that with magnesium powder, you can make a historic doping agent to coat your zeppelin with!

[–] Kolanaki@yiffit.net 14 points 7 months ago

You also need both iron oxide and aluminum powder to make thermite. It's amazing what metal can achieve when it works together.

[–] Liz@midwest.social 2 points 7 months ago (3 children)

Yeah but like, in order to get significant amounts of it you gotta be in a relatively harsh environment.

[–] Olhonestjim@lemmy.world 5 points 7 months ago (1 children)

You get a lot of it at sea. Not supposed to polish it off though, because the aluminum oxide acts as a barrier to further corrosion, whereas iron oxide flakes and continually exposes fresh surface.

[–] Liz@midwest.social 1 points 7 months ago

Yeah I imagine you would. Salty water loves to eat things up.

[–] Sam_Bass@lemmy.world 1 points 7 months ago (1 children)

Dunno how harsh a warehouse is. We used to get oxidized stuff for our presses a lot

[–] Liz@midwest.social 3 points 7 months ago (1 children)

It depends on what's in the warehouse. The only place I've seen significant aluminum corrosion was inside a vac frame hood with years of corrosive fumes in it. But, I'm sure there's a middle ground. Aluminum isn't inert, but it's better than raw iron at resisting corrosion.

[–] Sam_Bass@lemmy.world 2 points 7 months ago

Really depends on the grade of material. Aluminum has several different grades of varying hardness, ductility, resistance. Same as steel. Corrosion is the bane of most usable metals and industries are constantly researching methods to fight it