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topic 8292

White Chromate Treatment of Aluminium


Can anybody help me with information about white chromate treatment of aluminium. On my client's drawings surface treatment - "white chromate". What difference between white and yellow chromate ?

Any help would be greatly appreciated.

Viktor Persidski
- Tartu , Estonia


Your client may be referring to Clear (CC) Coating which differ from Multi Color (MC) type of Conversion Coating. We have used Alodine (1000) for this application but I have no idea if Iridite has a product similar to this.

Dado Macapagal
- Toronto, Ontario

August 20, 2010

Dear Sir,
Phosphoric acid along with some other chemicals can be use for aluminum treatment as non-chromate white treatment.
Any thing contains chrome can not be colorless.
Navin Maheshwari
- New Delhi, India

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