It is suggested that Au can be used for passivation but Au and prevent oxidation during processing. Yet Au is not allowed in many chambers. is it possible to passivate Cr with other materials such as Al?
you can read the following:
1. https://www.researchgate.net/publication/229330933_Passivation_of_Al-Cr-Fe_and_Al-Cu-Fe-Cr_complex_metallic_alloys_in_1M_H2SO4_and_1M_NaOH_solutions
2. https://www.sciencedirect.com/topics/materials-science/passivation
Proper passivation can help eliminate these weak areas and render your chrome surfaces more resistant to corrosion and wear.
Trivalent chromium passivation uses after zinc plating for enhancing corrosion resistance of parts. Chromate conversion was a common way of passivating with aluminium, zinc, copper, cadmium, silver, tin and magnesium alloys. Anodic is an electrolytic process to forms a thicker oxide layer. The anodic coating consists of hydrated aluminium oxide and is considered resistant to corrosion and abrasion.
Dear Dan Haronian ,
welcome!
I think you can passivate Cr by directly oxidizing its surface or supply its surface by a metal oxide layer such as Al2O3 rather than aluminum.
Best wishes
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