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Tell me about tarnishing

I know this may seem frivolous, but I am an eighth grade Pre-Ap science student who has had no luck whatsoever in finding the answer to this question. Why does tarnishing occur, and how exactly does it work.

Michael Ryan Roberts
- Bella Vista, Arkansas

Tarnishing is corrosion of the surface. It happens because a metal oxide or sulfide is more stable than a raw metal. The raw metal is active and wants to combine with oxygen or sulfur in the air to form a metal oxide or metal sulfide.

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