Liquid chlorine vaporizers are often subject to corrosion, which can include: crevice corrosion, pitting corrosion, stress corrosion cracking, etc. Crevice corrosion

In various forms of corrosion, crevice corrosion is the most common. Crevice corrosion appears as cracks, occurring in areas with insufficient oxygen supply, leading to the breakdown of the passive film. It can occur within the same material or between different materials (at least one of which is metal). For instance, in areas with gaskets or on metal surfaces with adhered deposits, hence it is advisable to minimize the formation of sediment layers. An effective way to prevent this type of corrosion is to increase the content of chromium and molybdenum, especially molybdenum, in the alloy.

Pitting corrosion

Pitting corrosion occurs locally on the passivated film of metal. If the passivation film does not regenerate quickly enough, this corrosion accelerates, deepening the corrosion depth. It generally occurs in aqueous solutions containing halides (such as chlorides).

Stress Corrosion Cracking

Stress corrosion cracking is a type of corrosion that occurs in metals when subjected to tensile stress and specific corrosive agents, resulting in the formation of cracks. The appearance of cracks is often unpredictable, and there are no visible changes in the corroded components. The conditions for stress corrosion cracking to occur are: 1. The material is sensitive to the specific medium causing stress corrosion; 2. The specific medium is present in the corrosive environment; 3. The component surface is subjected to tensile stress exceeding the critical value (including internal stress); 4. The effects of other forms of corrosion, such as pitting or crevice corrosion.