Question

Which of the following corrosion form is/are autocatalytic in nature?

(a) Pitting and crevice corrosion

(b) Crevice corrosion only

(c) Pitting corrosion only

(d) Pitting and intergranular corrosion

I got this question by my school teacher while I was bunking the class.

Asked question is from Eight Forms in section Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct option is (a) Pitting and crevice corrosion

The best I can explain: Autocatalytic is a phenomenon of rapid corrosion that occurs within the pit or crevice, while oxygen reduction takes place on adjacent surfaces. This process is self-stimulating and self-propagating. It occurs in both pitting and crevice corrosion.