Pitting Corrosion

A highly localized form of corrosion that produces small, often deep cavities (pits) on a material surface following local failure of a protective film or coating.

A localized form of electrochemical corrosion that produces small, often deep cavities (pits) on a metal surface following local breakdown of a protective passive film or differential aeration, leading to concentrated metal loss confined to small surface sites rather than uniform general corrosion.