What is a typical location that may exhibit corrosion in a caustic storage vessel?

• A. High-stress areas
• B. Low-stress areas
• C. Insulated sections
• D. Outside surface

Answer: (A)

Corrosion in a caustic storage vessel is most likely to be observed in high-stress areas. These regions are typically subject to mechanical stress due to the vessel's operational conditions, such as pressure and temperature changes. Stress concentrators, such as welds or sharp corners, can exacerbate corrosion, particularly in the presence of caustic substances, which are aggressive and can attack the material more readily.

High-stress areas can create localized effects on the material, increasing the likelihood of corrosion, especially stress corrosion cracking. Therefore, inspecting these regions is crucial for maintaining the integrity and safety of the pressure vessel. Understanding this allows for the implementation of appropriate maintenance and monitoring strategies in facilities handling caustic substances, ensuring their reliability in service.