Building Materials - Engineering

Q1:

The pigment used in paints for corrosive resistance, is

A white lead

B ferrous oxide

C zinc white

D red lead

E gypsum.

ANS:D - red lead

For many years, red lead has been recognized as an essential component, in combination with linseed oil, of priming paints for structural steel work. The degree of protection afforded over long periods to many important steel structures provides ample proof of the soundness of this practice.