Why did the copper hinges on the mahogany furniture turn black

Updated on furniture 2024-08-29
1 answers
  1. Anonymous users2024-01-24

    The copper accessories of this mahogany furniture are not pure copper, they are copper-tin alloys, so they are black after oxidation, pure copper is green after oxidation, and the accessories of copper-tin alloys are black after oxidation. Thank you.

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