Which type of corrosion is usually exacerbated by poor sealing?

Crevice corrosion is a localized form of corrosion that occurs in confined spaces or crevices where stagnant water or moisture can accumulate. Poor sealing in any type of equipment or structure can lead to the formation of crevices, which trap corrosive agents such as moisture, salts, or other chemicals. This stagnant environment is often devoid of sufficient oxygen for uniform corrosion to occur, but it creates ideal conditions for more aggressive localized corrosion processes.

In the case of crevice corrosion, the buildup of corrosive agents and limited oxygen access contribute to a significant differential between the anodic and cathodic reactions, leading to rapid material degradation in the crevice area. It becomes particularly severe in environments where chlorides are present or in acidic conditions, which can further enhance the corrosion process.

Thus, when sealing is inadequate, it can create multiple crevices where corrosion can initiate and thrive, making it a key factor in the exacerbation of crevice corrosion.