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Which of the following metal is more susceptible to crevice corrosion?(a) Titanium(b) Hastelloy C(c) Stainless steel-430(d) Titanium and stainless steelI have been asked this question in a national level competition.My question is from Eight Forms topic in portion Eight Forms of Corrosion of Corrosion Engineering

Answer»

Correct option is (c) Stainless steel-430

To explain I would SAY: Stainless steel-430 is highly prone to CREVICE corrosion. The reasons are as follows:

1. Large critical current density

2. Wide active-passive transitions

3. LIMITED passive REGION



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