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What is this black coating material on aluminum foil

I have aluminum foil with black coating. When given for tests found the composition has - Carbon, sulfur and Oxygen. Would like to know the exact compound of this material.

Dattu Kumar Ambati
- Hyderabad, Andhra Pradesh, India
2002

Hi Dattu.

Please present your real world situation. It could be paint, it could be anodizing. Did you find this piece of foil as a prize in your breakfast cereal or are you trying to reverse engineer a stealth bomber? Is this your freshman chemistry homework , or you a practicing chemist?

No one can help you if you don't tell them what you are doing. Please, please ... be specific about what you are looking at, what function the item plays, who you are, and why you are attempting to analyze this surface finish. Then someone can help you.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2002

Uh, oh. No reply or clarification from Mr. Ambati. Maybe it was a stealth bomber after all :-)

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2002

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