Surface anticorrosion treatment of chemical storage tank

The explosion accident of the Xiangshui chemical company on March 21 in 2019 shocked us. The main cause of the accident was the explosion of the chemical storage tank in the chemical plant. This accident caused many deaths, many families were fragmented, and the local ecological environment It was also severely damaged. After this accident, the state requires profound lessons learned and resolutely preventing the recurrence of a major accident. The surface anti-corrosion treatment and rust removal treatment of chemical storage tanks brook no delay.

 

Storage tanks are generally located in areas such as the petrochemical industry and steel industry. The acid gas in the air is dissolved in rainwater or in the spray water used for cooling in summer, which causes the oxygen depolarization reaction under the liquid film on the steel surface. When the temperature drops periodically, the water dissolved in the electrolyte will condense on the outer surface of the storage tank to form a continuous electrolyte solution film layer, thereby causing corrosion. One type of corrosion of the outer wall of the storage tank is mainly atmospheric electrochemical corrosion of the outer wall of the bottom plate. This is mainly due to the changes in water, oxygen, and temperature differences in the atmosphere, the corrosion of corrosive gases such as coastal salt spray and chemical atmosphere, and the aging damage of the coating caused by ultraviolet rays.

 

The anti-corrosion and rust removal of storage tanks include the inner wall of the storage tank and the outer wall of the storage tank. Generally speaking, the outer wall of the storage tank is much simpler than the inner wall, because the inside of the tank (various tanks) Because there are some residual oil and gas, especially when the explosion limit of some oil and gas is not high, it is easy to cause safety accidents, so the anti-corrosion and explosion-proof level of the inner wall is higher than that of the outer wall of the oil tank.

 

The German Deno metal anti-rust wax introduced by our company can be used in relatively harsh acid-base corrosion environment for a long time, and maintains a good anti-rust coating film state. It has better high temperature corrosion than conventional anti-rust paint and can withstand hydrogen fluoride. Acid-resistant hydrofluoric acid anti-rust wax; anti-rust wax that can withstand strong organic solvent corrosion and ultra-high temperature gas corrosion; anti-rust wax that can specifically withstand high temperature flue gas and strong corrosion friction of flue gas condensate. Anti-corrosion wax for ethers, fluorines, and oils, which can avoid rust directly with rust and corrosion. For example, the two products DINITROL 445/DINITROL 4941, heavy-duty anti-corrosion materials, long-lasting corrosion resistance, acid and alkali resistance, strong ductility, no margins, no warpage, no skin, and effective protection against stone and mechanical damage. Suitable for anticorrosion of various chemical storage tanks.

 

The selection and coating of corrosion prevention materials are very important to ensure the long-term safe and stable operation of the storage tank. According to the specific use conditions of the equipment, choosing the appropriate anti-corrosion coating, reasonable matching, and careful construction can achieve satisfactory protection effects. With the continuous progress of coating technology, high-solid, solvent-free coatings that meet environmental protection requirements, such as anti-rust wax, will further improve the anti-corrosion performance of the coating and provide more durable and reliable protection for storage tanks.