What measures should be taken to effectively prevent corrosion in vacuum pumps?

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As an important component of the vacuum extraction system in condensing steam turbines, the vacuum pump is primarily used to remove non-condensable gases from the condenser and to establish a vacuum at the beginning of the vacuum formation process. Water ring vacuum pumps are widely used in large-scale equipment due to their significant advantages, including short start-up time, good start-up performance, strong suction capacity within the designed pressure range, as well as stable performance and high efficiency. Two vacuum pumps at a certain enterprise suffered from corrosion and leakage during operation, severely affecting safe production. The type of waste gas involved in the company’s production process is unknown, making it difficult to determine which type of corrosion may occur. The pump body is made of 316L stainless steel, and the temperature ranges from 30 to 40°C. Vacuum corrosion wear not only reduces operational efficiency and labor productivity, but it also often incurs high costs for repairing water ring vacuum pumps; therefore, effective repair measures must be taken to prevent further corrosion. Repair can be carried out using Sorey carbon nanopolymer material technology, which effectively prevents corrosion and wear in water ring vacuum pumps. 1. Treating the equipment surface: First, for the repaired vacuum pump, it is necessary to treat its surface properly. Oil and rust on the surface of the equipment should be removed first; any sludge or debris attached to the surface must also be washed away. In cases where there is oil on the surface, anhydrous ethanol can be used for cleaning. As for rust on the surface, tools such as gauze, grinding wheels, or polishers can be used to grind and polish it, avoiding direct contact with the surface of the equipment. 2. Selection of repair coating: The coating chosen must be able to withstand temperatures between 30°C and 40°C. Sorex carbon nanopolymer materials possess excellent adhesion properties, as well as resistance to high temperatures, wear, and chemical corrosion ； It can be repaired online, avoiding the need for machining and disassembly, and is also not affected by the thermal stress concentration issues associated with welding repairs. 3. During the use of repair materials, it is necessary to weigh them accurately and mix them multiple times to ensure uniform mixing. Additionally, the temperature during curing must be controlled to guarantee the quality of the materials used. During the application of the surface coating material, it is important to ensure that the material is applied evenly and compactly, so as to avoid bubbles on its surface. The application must be uniform, and it is necessary to maintain the cylindricity and coaxiality of the impeller, as well as the fit tolerances with the pump casing. The assembly can only take place after the material has fully cured.