Common faults and precautions for stainless steel reaction kettles

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Stainless steel reaction vessels encounter many problems during use, with three being the most common. The first is damage caused by processing stresses; during the manufacturing of the vessel’s tank body, large amounts of internal stress are generated as a result of rolling, stamping, and welding. These stresses must be completely eliminated before the vessel leaves the factory, as failure to do so can lead to the cracking of the vessel’s surface. Such damage to stainless steel reaction vessels usually occurs within the first three months after they are put into use. Therefore, heat treatment or aging treatment of the embryo can prevent porcelain cracking. The second common failure is hydrogen evolution corrosion. The jacket of stainless steel reactors develops scale and rust after being in use for some time. Using acidic descaling agents to remove the scale, or if the coolant in the jacket is acidic, can cause hydrogen evolution corrosion of the metal. Some atoms diffuse into the voids within the metal; due to the density of stainless steel, they cannot spread further outward. Therefore, when enough hydrogen accumulates to generate sufficient pressure, the stainless steel reactor will crack. Electrostatic penetration occurs in stainless steel reactors when mixing liquids containing suspended particles; the intense friction between these particles and the enamel, along with the friction within the particles themselves, generates a large amount of static electricity. This high level of static electricity exerts strong penetrating forces on the stainless steel reactor, leading to pitting of the enamel. Therefore, the stirring speed should not be too high. When using acid cleaning to remove scale from stainless steel reaction vessels, a buffer must be added. If the enamel-lined tanks are valuable, difficult to replace, or prone to corrosive perforations, high-quality cleaning agents with a low corrosion rate should be used to avoid serious consequences resulting from improper cleaning procedures.