passivation is the spontaneous formation of a hard non-reactive surface film that inhibits further corrosion. This layer is usually an oxide or nitride that is a few atoms thick. Pure aluminium naturally forms a tough resistant oxide, alumina, almost immediately that protects it from further oxidation in most environments.
Thursday, December 24, 2009
Why aluminium oxide layer is so passive?
Between Al3+ and O2- ions is a strong ionic bond. This is so because of the high charge of the ions and the small size of the ions. The strong ionic bond causes the aluminium oxide to be very stable and hence passive.Why aluminium oxide layer is so passive?
passivation is the spontaneous formation of a hard non-reactive surface film that inhibits further corrosion. This layer is usually an oxide or nitride that is a few atoms thick. Pure aluminium naturally forms a tough resistant oxide, alumina, almost immediately that protects it from further oxidation in most environments.caption liquid color try toneer cartridges glycolic acid peel
passivation is the spontaneous formation of a hard non-reactive surface film that inhibits further corrosion. This layer is usually an oxide or nitride that is a few atoms thick. Pure aluminium naturally forms a tough resistant oxide, alumina, almost immediately that protects it from further oxidation in most environments.
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