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hard anodized aluminium: oxide layer is ceramic– more fire -proof?
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Home › Forums › Gear Forums › Gear (General) › hard anodized aluminium: oxide layer is ceramic– more fire -proof?
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Jun 5, 2011 at 2:09 pm #1274946
In hard anodized aluminium, the anodization's resulting oxide layer is a ceramic–
so would hard anodized aluminium foil be fire-proof if used in a wood stove, providing anodizing is thick enough. Even if inner plain aluminium melted would the ceramic hold it together till "unmelts"?
Jun 5, 2011 at 2:24 pm #1745230No. It wouldn't. Alumina (aluminum oxide) is extremely brittle. On anodized foil it is actually millions of separate little particles individually bound to the metallic aluminum substrate, all of them separated by a web of billions of tiny cracks and fissures. It isn't one continuous sheet of ceramic. The anodized surface has no more structural value than the paint on a house.
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