Urgent! ! ! Can die-casting aluminum alloy be oxidized to black and how much high temperature can it withstand after oxidation?

If yes, you can, but you can't do exterior decoration, because of the influence of silicon, there will be the problem of uneven color. High temperature resistance is like aluminum alloy without oxidation. The common anodic oxide film is only a few μ thick, and the hard anode can reach more than 35μ.