Question

Why intergranular attack is not prevented in ferritic stainless steel even if carbon is reduced to 0.3%?

2. Although carbon reacts with titanium and niobium which are added as stabilizers, yet intergranular corrosion is not observed in their presence. Explain​

Answer 1

Answer:

Explanation : Intergranular corrosion can be prevented through: Use low carbon (e.g. 304L, 316L) grade of stainless steels. Use stabilized grades alloyed with titanium (for example type 321) or niobium (for example type 347). ... They react with the carbon to form the corresponding carbides thereby preventing chromium depletion.