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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 corrosionI 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»

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.



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