Corrosion varies due to unreasonable tank design

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The figure below shows an arch-shaped gasoline tank designed in accordance with **standards at a certain refinery. The anti-corrosion material is chlorosulfonated polyethylene paint, applied in six coats, with a coating thickness of over 200 microns. The external wall anti-corrosion coating has been in use for 5 years, and it can be seen that there is a significant difference in the degree of damage to the anti-corrosion coating on the upper part of the wind-resistant ring on the outside of the oil tank compared to that on the lower part. The reason is that the tank design has an unreasonable structure, with no rainproof ring on the top of the tank. Under the influence of chemical atmospheres, the anti-corrosion coating on the upper part of the tank roof deteriorates more rapidly than the anti-corrosion coating on the lower part of the tank’s wind-resistant ring.