Question

Which of the following is/are true regarding underground structures?

(a) Ordinary carbon steels and cast irons are commonly used

(b) Organic coatings can be used

(c) Cathodic protection is applied to protect it from corrosion

(d) Usually made of carbon steel and cast irons with or without organic coatings and supported by a cathodic protection system

This question was addressed to me during a job interview.

The query is from Environments topic in chapter Other Environments of Corrosion Engineering

Answer 1

Correct option is (d) Usually made of carbon steel and cast irons with or without organic coatings and supported by a cathodic protection system

Best explanation: Underground structures are usually made up of ordinary carbon steels and cast irons with or without organic coatings. These structures are also supported by a cathodic protection system to minimize corrosion.