Why brass gets discoloured in the air? The normal brown colourati

Why brass gets discoloured in the air? The normal brown colourati
| Why brass gets discoloured in the air?

A. Aluminium phosphide

B. Hydrogen sulphide

C. Hydrogenated wafers

D. Aluminium Sulphide

Please scroll down to see the correct answer and solution guide.

Right Answer is: B

SOLUTION

  • The normal brown colouration on brass which slowly forms is primarily due to the oxidation of the copper to copper oxide.
  • The greenish patina that forms on brass can be a complex that is formed mainly due to constant exposure of hydrogen sulphides in air.

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