What are the common problems with anti-corrosion storage tanks in daily use?

Storage tanks are the basic infrastructure for energy storage. In order to achieve their design life and ensure safe and stable operation, anti-corrosion storage tanks are very popular due to their excellent anti-corrosion performance. Due to the fact that the anti-corrosion measures for anti-corrosion storage tanks involve multiple aspects such as design, coating raw materials, coating synthesis and preparation process, coating storage, construction process, operation and maintenance, any problem in any link may affect the anti-corrosion effect of the storage tank. Therefore, it is necessary to conduct in-depth analysis in this regard.

Usually, anti-corrosion storage tanks adopt a comprehensive anti-corrosion method of coating protection and cathodic protection, among which coating protection is divided into internal anti-corrosion and external anti-corrosion of the tank, among which the internal anti-corrosion coating mostly uses conductive coatings; External anti-corrosion coatings should take into account anti-corrosion, weather resistance, and aesthetic properties. At the same time, compatibility and temperature resistance characteristics between each anti-corrosion layer should also be considered in the design of the anti-corrosion layer.

The cathodic protection of anti-corrosion storage tanks is divided into anodic protection of the accumulated water layer inside the tank and cathodic protection of the external current of the tank bottom plate. When designing, full consideration should be given to the compatibility between the grounding material and the tank system, as well as the consumption of cathodic protection current by the grounding system.

Due to the fact that most coatings contain different substrates, pigments, fillers, and other components with varying densities, they are prone to delamination or clumping after prolonged storage, which can affect the final coating quality. Therefore, for substances with significant density differences in the coating formula, the packaging should be regularly inverted during transportation and storage to thoroughly mix the precipitated parts with the substrate again; Alternatively, substances with significant differences in specific gravity can be separated separately and thoroughly mixed with the matrix during application.

During use, the coating of anti-corrosion storage tanks may easily cause local failure due to long-term contact with corrosive media or exposure to wind, rain, and sunlight. This issue not only poses a threat of further corrosion to the storage tank, but also greatly affects the overall image of the project. Therefore, it is recommended to completely replace the anti-corrosion tank coating and strictly control the time interval between each coat of paint.