The anti-corrosion coating on the water side of the tube bundle in the petrochemical wax oil cooler failed after less than 1 year of use
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The image below shows the wax oil water cooler of a petrochemical company, with a wax oil inlet temperature of 140 degrees. The inlet temperature of the circulating water inside the tube bundle is 30 degrees, with a pressure of 0.5 Mpa. The image below shows the condition of the epoxy-amino coating after less than 1 year of use, which is far below the designed lifespan (more than 4 years).
Coating failure can be caused by the following reasons: 1. Improper material selection: Epoxy-amine coatings may not be suitable for high-temperature or chemical environments. 2. Construction quality issues: Problems such as uneven thickness and insufficient curing may occur during coating application. 3. Operating conditions: In actual use, temperature, pressure, or chemicals may exceed the tolerance limits of the coating. 4. Equipment maintenance: A lack of regular inspection and maintenance can lead to premature aging or damage of the coating. It is recommended to conduct a thorough inspection of the coating to identify the specific cause of failure, select more suitable materials for repainting, and enhance the operation and maintenance management of the equipment. .
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