Crevice corrosion is a form of localized pipeline corrosion that develops in confined spaces where stagnant fluid accumulates — such as between flanges, under gaskets, at bolt.

Crevice corrosion is a form of localized pipeline corrosion that develops in confined spaces where stagnant fluid accumulates — such as between flanges, under gaskets, at bolt holes, or beneath debris deposits. The restricted geometry limits oxygen diffusion, creating an aggressive electrochemical environment that rapidly attacks the metal surface.

In pipelines, crevice corrosion often occurs at mechanical joints, repair sleeves, support clamps, and areas with incomplete coating coverage. The resulting metal loss can be severe and highly localized, leading to through-wall penetration and leaks if not detected early.

Prevention strategies include using corrosion-resistant alloys, proper joint design, effective sealing, and regular inspection. For buried pipelines, EMPIT's CMI technology detects localized corrosion patterns and coating anomalies from the surface — helping operators identify crevice corrosion risk zones without excavation.