Aluminium oxide is to blame for resistance of metallic aluminium to weathering. Metallic aluminium is extremely reactive with atmospheric oxygen, and a thin passivation layer of alumina (4 nm thickness) sorts in about a hundred picoseconds on any exposed aluminium floor.[five] This layer protects the steel from further more oxidation. https://juliusznbis.blog2news.com/35499453/detailed-notes-on-lanthanum-carbonate