Thank u warrior1.
My method of oxidation is without any steam, its a simple process , heating inside furnace in normal environment ( means with the presents of air) and after heating the substrate was air cooled. Really hope , somebody have some explanation...
Thank you Danger for your kind clarification.
I just mean that from my series of experiment, I observed that aluminium is not present in the top surface where from the cross -sectional view: Al presents in the bottom layer of the oxidized layer. i.e. question: Is there any explanation that the...