Question

Which of the following metal is highly prone to pitting corrosion?

(a) 18-8 stainless steel by sulfuric acid with FeCl3

(b) Titanium by sulfuric acid with FeCl3

(c) Nickel by sulfuric acid with FeCl3

(d) Copper by sulfuric acid with FeCl3

I have been asked this question during a job interview.

I need to ask this question from Eight Forms in chapter Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct option is (a) 18-8 stainless steel by sulfuric acid with FeCl3

To explain: Pitting is one of the most destructive and insidious forms of corrosion. 18-8 stainless steel is highly prone to pitting corrosion by sulfuric acid in the presence of FeCl3. Whereas other metals are relatively resistant to pitting. Because it mainly depends on oxide film for its corrosion-resistant.