Which of the following is/are the difference between the crevice and pitting corrosion?(a) Autocatalytic nature(b) Corrosion mechanism(c) Initiation method(d) Both the corrosion mechanism and initiation methodI have been asked this question in an interview for internship.The query is from Eight Forms topic in division Eight Forms of Corrosion of Corrosion Engineering

Which of the following is/are the difference between the crevice and p

1.	Which of the following is/are the difference between the crevice and pitting corrosion?(a) Autocatalytic nature(b) Corrosion mechanism(c) Initiation method(d) Both the corrosion mechanism and initiation methodI have been asked this question in an interview for internship.The query is from Eight Forms topic in division Eight Forms of Corrosion of Corrosion Engineering
Answer» Correct choice is (c) Initiation method The best I can explain: Pitting is a special CASE of CREVICE CORROSION. But in the view of the initiation method, these two-corrosion processes are DIFFERENT. Pitting corrosion is a self-initiating corrosion FORM, whereas crevice corrosion needs the formation of crevice (a small gap) with differential concentration from outside.

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