What type of corrosion is characterized by localized attack in pits or crevices?

Pitting corrosion is indeed characterized by localized attacks that form small, deep pits or cavities in the material. This type of corrosion often occurs when there is a breakdown in the protective oxide layer on metals, leading to a concentrated attack by corrosive agents, usually in environments where stagnant or trapped electrolytes exist. The pits can penetrate deeply into the material and can lead to structural failure if not monitored and addressed.

While crevice corrosion shares similarities with pitting corrosion in that it occurs in constrained spaces like cracks or crevices, it is distinct in that it is driven primarily by concentration gradients and electrolyte stagnation in tight areas. The two types are related; however, the term "pitting corrosion" specifically refers to the formation of numerous localized pits, making it the more precise answer in this context. Other types of corrosion listed, such as galvanic and uniform corrosion, involve different mechanisms and appearances that do not strictly match the description of localized pit-like attacks.