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Curated with aloha by
Ted Mooney, P.E. RET
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The authoritative public forum
for Metal Finishing 1989-2025
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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.
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Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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