Question

What is the purpose of surface preparation?

(a) Surface roughening for mechanical bonding

(b) Removal of dirt, rust and mill scale

(c) Removal of welding flux and other impurities

(d) Surface roughening for mechanical bonding, removal of dirt, rust, mill scale, welding flux, and other impurities

I got this question during a job interview.

My doubt is from Corrosion Prevention topic in division Corrosion Prevention of Corrosion Engineering

Answer 1

Correct answer is (d) Surface roughening for mechanical bonding, removal of dirt, rust, mill scale, welding flux, and other impurities

To explain: Surface preparation is a crucial part of the stability of coatings. It roughens the surface to obtain mechanical bonding, removal of dirt, rust, mill scale, welding flux, and other impurities.