?? ??? ?? ????? ?? ??????? ?? ????? ?? ?? ?? ???? ?? ?????? ?? ????? ?? ???????? ??? ???? ???? ? ?? ???? ??? ?? ?? ???? ???????. ?????? ??????Oxide coatings could get formed about pure elements also, As an example, a foil fabricated from aluminium will get covered by a thin pores and skin of Al2O3, and this skin defends the rest of the foil from co

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