RE: Science Challenge # 2 - What is Aluminium Oxide?

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Science Challenge # 2 - What is Aluminium Oxide?

in steemstem •  7 years ago 

1.only from oxygen in the air

It is kind of a layer that if damaged mechanically, repairs itself later.

so, it actually re-appears thanks to scratches
=))

steemstem
7 years ago by

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      ·  7 years ago 

    Yeah. Lol.. Then again, they ruin more of the materials :D

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