[vermutung2]

Hi all, new forum user here.

I would like to color some stainless steel by anodization for my school project.

After reading through some research articles, I found that they use a common electrolyte which consist of the combination of H₂SO₄ and CrO₃ in a concentration ratio of around 2:1

The problem is that I cannot buy Chromium trioxide due to the restriction in my country.

What is the use of CrO₃ in anodizing stainless steel? Could anyone provide some suggestions for my situation that I can anodize stainless steel without direct access of CrO₃? Coloring through heating would be my last option

Thank you