I'm working on alumina coating on GGG40 ductile iron. I use the dip coating technique for coating. The solution contains ethanol, distilled water, aluminum chloride, and ammonium. The gel coats steel well but some oxidation problem occurs on iron. I'm guessing it is about Cl but I couldn't fix it. Do you have any ideas?
Burak Görgülü
Wang Jinkai Thanks for your response. Can you suggest something to solve this problem?
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Wang Jinkai
I do know what your purpose is.
I think if you could dip coat of pure Al on iron and then oxidate the Al coat to form Al2O3.
Dip coat of Al will not envole water, Cl, whic would lead to iron corrision.
This is a guess.
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