Commonly used material selection principles for anti-corrosion pump

Choose the correct material of anti-corrosion pump is a key reason to maintain the safe operation of anti-corrosion pump and extend the service life of anti-corrosion pump. The selection of materials for anti-corrosion and anti-corrosion pumps should be integrated from multiple levels and refer to the impact of various reasons. The following full text summarizes some commonly used material selection principles for anti-corrosion pumps.

　　1. The characteristics of the anti-corrosion pump transmission liquid and the operating conditions of the anti-corrosion pump, such as temperature, pressure head, corrosion, viscosity, whether it contains solid particles, etc. In addition, it is necessary to refer to other special conditions, such as medicine, food and chemical needs to transfer liquids that are relatively clean, to prevent metal ion pollution, and to transfer materials containing solid particles to the materials that require wear resistance.

2. The mechanical properties of the material should be suitable for the requirements of anti-corrosion pumps. There are many indicators that reflect the mechanical properties of the material. For the materials used for anti-corrosion pumps, the primary reference is the strength, rigidity, hardness, plasticity, impact toughness and fatigue resistance of the reference material.

3. The processing performance of the material is directly related to the production and assembly maintenance of the anti-corrosion pump. Most parts of the anti-corrosion pump, such as the impeller, casing, and balance plate, are cast from metal materials, and then processed mechanically, and some parts are also subject to heat treatment.

4. The quality of material processing technology also directly affects the application of materials and the cost of anti-corrosion pumps.

　　5. The quality of anti-corrosion performance is a key fault that cannot be ignored in the selection of materials for anti-corrosion pumps. Compared with the petrochemical manufacturing industry, the anti-corrosion of anti-corrosion pumps is particularly critical.

Summarize the commonly used material types of anti-corrosion pumps:

Petrochemical manufacturing often encounters acids, alkalis and other media materials that are corrosive to metal materials. The centrifugal water pumps used to transfer such materials are collectively called anti-corrosion centrifugal water pumps. The models of these pumps are all expressed in F. Their operating principle is similar to that of centrifugal cleaning pumps. Determined by the material properties.

The reason why most anti-corrosion pumps can be anti-corrosion depends on the material of the pump’s overflow parts. Compared with the anti-corrosion pump, the material of the pump overflow parts needs to be selected according to the difference of the transmitted liquid. For example, 1Cr18Ni9Ti can be used for low concentration nitric acid at room temperature and other oxidizing acids, alkalis and weakly corrosive liquids: 0Cr18Ni12Mo2Ti is most suitable for transmitting high concentration nitric acid at room temperature, and can also transmit reducing liquids such as sulfuric acid and organic acids: gray cast iron HT200 is used in Concentrated sulfuric acid; plastics are used in a wide range. Polyfluoroethylene ethylene and perfluoroethylene propylene and other materials are made by reasonable formulation, molding, and processing. The plastic anti-corrosion pump has strong anti-corrosion performance and high mechanical strength. , Non-aging, non-toxic decomposition and other advantages, is a better machinery to transport a variety of strong and weak acids, of which polyvinyl fluoride ethylene is one of the best anti-corrosion materials, basically resistant to any acid, alkali liquid corrosion, ceramic , Enamel, glass, etc. are also used to produce anti-corrosion pump overflow parts in some special places.