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What is the general purpose of each coating in a three-layered coating of an automobile bumper?

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+1 vote
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in Corrosion Engineering by (98.5k points)
What is the general purpose of each coating in a three-layered coating of an automobile bumper?

(a) Inner coating – adhesion, intermediate coating – corrosion protection and top layer – appearance

(b) Inner coating – corrosion protection, intermediate coating – adhesion and top layer – appearance

(c) All layers for corrosion resistance

(d) All layers for appearance

The question was asked in an interview for internship.

My question is based upon Corrosion Prevention in portion Corrosion Prevention of Corrosion Engineering

1 Answer

+1 vote
by (888k points)
The correct option is (a) Inner coating – adhesion, intermediate coating – corrosion protection and top layer – appearance

Easiest explanation: In general, multiple layered metallic structures consist of inner coating for adhesion such as copper, intermediate coating for corrosion resistance such as nickel and top coatings for appearance such as chromium.

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