Question

Which of the following methods would be helpful if a material that is not resistant to corrosion is used?

(a) Painting a protective layer

(b) Heating to 10°F

(c) Increase the quantity of material

(d) Disjoining

The question was posed to me in a job interview.

This is a very interesting question from Materials Selection in chapter Materials Selection of Aerospace Materials & Processes

Answer 1

Right answer is (a) Painting a protective layer

The explanation is: Materials that are not resistant to corrosion can be painted with a protective layer of another metal. A few examples of metals are chromium, nickel or zinc. Increasing the quantity of material or heating will not help.