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Easily oxidized in air and welding of aluminum, alumina (Al2O3) with high melting point, very stable, it is difficult to remove.

Aluminum when air and welding is extremely easy to oxidize, production aluminum oxide (Al2O3) melting point high, extremely stable, not easy to remove.

Aluminum in air is extremely vulnerable and welding, sulfur dioxide, aluminum oxide (Al generated by 2 3) O high melting point, is very stable, and it is not easy to remove.

Easily oxidized in air and welding of aluminum, alumina (Al2O3) with high melting point, very stable, it is difficult to remove.