Crevice corrosion
Crevice corrosion is a localized type of corrosion that occurs in narrow gaps or shielded areas where moisture, oxygen, or chemicals become trapped. These crevices create an aggressive micro-environment that accelerates metal degradation.
Where does crevice corrosion occur?
Crevice corrosion is common in:
- Oil & Gas – flanges, gaskets, and bolted joints on pipelines and tanks.
- Petrochemical & Chemical plants – under insulation jackets and vessel supports.
- Marine & Offshore wind – under deposits, clamps and joints exposed to seawater.
- Infrastructure – bridges, cranes, and bolted structural connections.
For you as an asset owner, crevice corrosion is dangerous because it is hidden and often more aggressive than general corrosion, leading to leaks or failures.
Extra explanation and causes
- Low oxygen inside the crevice → creates differential aeration cells.
- Trapped chlorides or chemicals → accelerate localized attack.
- Poor sealing or damaged gaskets → allow water ingress.
- Coating breakdown in tight areas → exposes bare steel.
Crevice corrosion is especially critical in stainless steel structures exposed to chlorides.
Pinovo’s role in crevice corrosion
Pinovo’s dust-free blasting helps you address crevice corrosion by:
- Removing coatings and corrosion products around joints and flanges.
- Exposing hidden corrosion zones for proper inspection.
- Preparing narrow surfaces so protective coatings or repairs can be applied effectively.
Pinovo does not repair the damage inside crevices, but it ensures these areas are accessible, visible, and ready for coating or repair systems.
Do you want to uncover hidden crevice corrosion safely and prepare for repair?
Request a demo or training to see how Pinovo exposes and prepares crevices.