What type of coating is formed on copper articles when they get corroded ?
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Answered by
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hi friend...
Just as iron that is left unprotected in open air will corrode and form a flaky orange-red outer layer, copper that is exposed to the elements undergoes a series of chemical reactions that give the shiny metal a pale green outer layer called a patina.
The patina actually protects the copper below the surface from further corrosion, making it a good water-proofing material for roofs ....
hope this helps u...
Just as iron that is left unprotected in open air will corrode and form a flaky orange-red outer layer, copper that is exposed to the elements undergoes a series of chemical reactions that give the shiny metal a pale green outer layer called a patina.
The patina actually protects the copper below the surface from further corrosion, making it a good water-proofing material for roofs ....
hope this helps u...
Answered by
0
Answer: black
Explanation:
A black coating of silver sulphide is formed on silver articles when they get corroded. The silver articles react with Hydrogen Sulphide (H2S) present in air to form layer of black layer on it.
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