Which of the following is an example of an inorganic coating?

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ISRO VSSC Technician-B Fitter 02 June 2019 Official Paper
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  1. Oil painting
  2. Varnish
  3. Ceramic coatings
  4. Zinc chromate primer

Answer (Detailed Solution Below)

Option 3 : Ceramic coatings
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Detailed Solution

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Explanation:

A protective coating on the surface of metals and alloys isolates them from corrosive environment, thereby preventing corrosion. There are different types of coating:

  • Metallic coating
  • Organic coating
  • Inorganic coating

Inorganic coatings: Glass, cement, ceramic and chemical conversion coatings.

Chemical conversion: Anodizing, oxide, chromate, phosphatizing.

Organic coatings:

 Paints, lacquers, varnishes (Resin, solvent + pigment in the coating liquid). High performance organic coatings used in petroleum industries.

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