What Is Pitting?

Pitting

Pitting in steel is a form of localized corrosion that results in small, often deep holes or cavities on the metal surface. It typically occurs when protective coatings or passive oxide layers break down, allowing aggressive substances like chlorides or acids to attack specific spots. Although the damage may appear minor on the surface, pitting can lead to serious structural weakness over time, especially in environments with moisture, salt, or chemicals. It's a common concern in stainless steels and components exposed to hard conditions.