Which of the following is/are the causes of intergranular corrosion?
(a) Impurities at the grain boundaries
(b) Enrichment of one of the alloying elements at the grain boundary
(c) Depletion of one of the alloying elements at the grain boundary
(d) Impurities at the grain boundaries, enrichment, and depletion of one of the alloying elements at the grain boundary
The question was asked during a job interview.
I need to ask this question from Eight Forms in portion Eight Forms of Corrosion of Corrosion Engineering