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Chromate treatment to aluminum

I am planning to use the mill finished Aluminum in roofing. I want to know the corrosion performance difference between Mill finished and Chromate treated Aluminum. Also what will be the difference between chromated Aluminum and painted aluminum?

SACHIN [last name deleted for privacy by Editor]
- MUMBAI, INDIA
2005

Chromate treated aluminium is much more corrosion resistant.
Chromate treatment is standard pretreatment for painting. Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
2005

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