5 ms·

the oxide to pure aluminum ratio is high For some definition of high? Standard foil is around 20 um thick while the oxide layer only goes about 10 nm deep.

• bluGill 2mo ago
  When you melt thin al that creates more oxide as well.
  • kragen 2mo ago
    Only if you do it in an oxidizing atmosphere. Though aluminum is very liberal about its definition of "oxidizing atmosphere".