How to choose the material of high lift submersible pump
First, I think we all know the sulfuric acid, sulfuric acid as one of the most powerful corrosive medium, is mainly used in a very wide range of important industrial raw materials, corrosion of materials of different temperature and concentration of sulfuric acid is relatively large difference, and the sulfuric acid concentration is above 80%, the temperature of <80 DEG C under the condition of carbon steel and cast iron has corrosion resistance, but it is not suitable for pumping high speed flow but not pumping concentrated sulfuric acid sulfuric acid and high-speed flow, and is not suitable for valve materials. Ordinary stainless steel, such as 304[0Cr18Ni9] and 316[0Cr18Ni12Mo2Ti], are also limited for the use of sulphuric acid medium. In the delivery of sulphuric acid, the pump valves are usually made of high - wow cast iron [cast iron and processing difficulty], high alloy stainless steel [20 alloy]. Fluoroplastics have good resistance to sulphuric acid and corrosion resistance. The use of the fluorine pump [F46] is a more economical choice. The company can choose these products: IHF fluoroplastic high lift submersible pump, PF (FS) strong corrosion resistant centrifugal pump, CQB-F fluoroplastic magnetic pump and so on. Health level self-priming pump
Two, hydrochloric acid is the most metal material's resistance to hydrochloric acid corrosion (including all kinds of stainless steel). Molybdenum containing high silicon iron can also be used for 50 or 30% of hydrochloric acid, contrary to metal materials. Most non-metallic materials have good corrosion resistance to hydrochloric acid, so lining rubber pumps and plastic pumps, such as polypropylene and fluoroplastics, are the best choice for transporting hydrochloric acid. The applicable products include IHF fluoroplastic high lift submersible pump, PF (FS) strong corrosion resistant centrifugal pump, CQ polypropylene magnetic pump (or fluoroplastic magnetic pump), etc.
Three, is the most general metal nitrate in nitric acid by rapid corrosion, stainless steel is the most widely used in nitric acid resistant materials, all concentrations of nitric acid at room temperature have a good corrosion resistance, that is that the stainless steel containing molybdenum containing [such as 316, 316L] had to nitrate the corrosion resistance is not only no better than ordinary stainless steel [304, 321], sometimes even better. For high temperature nitric acid, titanium and titanium alloy are generally used. The products used are: IHG, ISWH high lift submersible pump, IH high lift submersible pump, CQB magnetic pump and so on. The material is 304.
Four, it is a matter of acetic acid is the most powerful corrosive organic acids, ordinary steel will have serious corrosion in all the acetic acid concentration and temperature, acid resistant stainless steel is an excellent material, 316 stainless steel containing molybdenum material can also be used in high temperature and dilute acetic acid vapor. High alloy stainless steel pump or fluoroplastic pump can be selected for high temperature and high concentration acetic acid or other harsh requirements for corrosion medium.
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