Question

What is meant by chemical conversion regarding coatings of a metal?

(a) Coating metal is vaporized electrically to deposit on the parts to be coated

(b) Coatings produced by corroding the metal surface to form an adherent protective layer

(c) Hot rolling of two metals together to produce composite sheet

(d) A metal wire or powder through the melting flame is blown onto the surface to be protected

I had been asked this question in examination.

I would like to ask this question from Corrosion Prevention topic in division Corrosion Prevention of Corrosion Engineering

Answer 1

Correct choice is (b) Coatings produced by corroding the metal surface to form an adherent protective layer

The explanation: Chemical conversion is one of the surface coating methods in that coatings are produced by corroding the metal surface to form an adherent protective layer.