Question

Which of the following type of stress has an important role in rupturing protective films during both the initiation and propagation of cracks?

(a) Tensile stress

(b) Compressive stress

(c) Shear stress

(d) Compressive and shear stress

I got this question during an interview.

Enquiry is from Eight Forms topic in portion Eight Forms of Corrosion of Corrosion Engineering

Answer 1

Correct option is (a) Tensile stress

To explain I would say: Tensile stress has an important role in rupturing protective films during both the initiation and propagation of cracks. Breaks in the passive layer of metal induce a rapid attack.