Corrosion-resistant centrifugal pump how to choose

1. Sulfuric acid medium As one of the strong corrosive medium, sulfuric acid is a very important industrial raw material. Different concentrations and temperatures of sulfuric acid on the corrosion of materials vary greatly, for the concentration of more than 80%, the temperature is less than 80 ℃ of concentrated sulfuric acid, carbon steel and cast iron has good corrosion resistance, but it is not suitable for high-speed flow of sulfuric acid, Not suitable for pump valve material; common stainless steel such as 304 (0Cr18Ni9), 316 (0Cr18Ni12Mo2Ti) sulfuric acid medium is also limited use. Therefore, the delivery of sulfuric acid pump valve is usually made of high silicon cast iron (casting and processing difficult), high alloy stainless steel (No. 20 alloy) manufacturing, but its processing is difficult and expensive, so people are not optimistic. Fluoroplastics alloy has very good resistance to sulfuric acid. It is the patented material of Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences. Our company introduced the patented technology in 1985 and the earliest use it to develop and produce corrosion-resistant chemical pump. The experiment proved by the Chinese Academy of Sciences, There is no chemical medium to react with it, so using a fluorine-based pump (F46) is a more economical option. Boyu company applicable to corrosion-resistant centrifugal pump products are: IHF fluorine plastic chemical pump, FSB fluorine plastic centrifugal pump, IGF-lined fluorine pipeline pump, PF-type centrifugal pump corrosion, CQB-F-type fluorine plastic magnetic pump. Today's latest valid order information free to send! Morning latest buyers information free to send! Punch grab Rob here! 2. Hydrochloric acid solution Most metal materials are resistant to hydrochloric acid corrosion (including a variety of stainless steel materials), Molybdenum high ferrosilicon can only be used for 50 ℃, hydrochloric acid below 30%. In contrast to metallic materials, the vast majority of non-metallic materials have good corrosion resistance to hydrochloric acid, so lined rubber pumps and plastic pumps (such as engineering plastics, fluoroplastics, etc.) are the best choice for the delivery of hydrochloric acid. Boyu company applicable products: fluoride plastic chemical pump series can be. 3. Nitric acid Most metals are mostly corrosive in nitric acid corrosion damage, stainless steel corrosion-resistant centrifugal pump is the most widely used nitric acid centrifugal pump, all concentrations of nitric acid at room temperature have good corrosion resistance, it is worth mentioning that with The corrosion resistance of nitric acid to molybdenum stainless steel (such as 316,316L) is not only inferior to ordinary stainless steel (such as 304,321), sometimes even worse. For high temperature nitric acid, usually using fluorine plastic alloy material. Boyu company applicable products include: IHF Fluorine plastic chemical pump, FSB fluoroplastic centrifugal pump, IGF Fluorine-lined pipeline pump, PF-type corrosion-resistant centrifugal pumps, CQB-F-type fluorine plastic magnetic pump. 4. Acetic acid It is one of the most corrosive substances in organic acids. Ordinary steel will be seriously corroded in all concentrations and temperatures of acetic acid. Stainless steel is an excellent acetic acid-resistant material. Molybdenum-containing 316 stainless steel is also suitable for high temperature and Dilute acetic acid steam. For high temperature and high concentration of acetic acid or other corrosive media and other harsh requirements, the choice of high-alloy stainless steel magnetic pump or fluorine plastic chemical pump such as CQB-type stainless steel magnetic pump, CQ-type magnetic drive pump, stainless steel pipe centrifugal pump, stainless steel chemical pump. 5. Alkali (sodium hydroxide generally corrosive is not very strong, but the general alkaline solution will have a crystal, so the optional configuration silicide, graphite 169 mechanical seal FSB-type plastic fluoride alloy centrifugal pump 6. Ammonia (ammonia hydroxide) large Most metals and non-metallic corrosion in liquid ammonia and ammonia (ammonia hydroxide) are minor, only copper and copper alloy should not be used. Most of the company's products are suitable for ammonia and ammonia transport. Such as IHF-type fluorine plastic chemical pump, FSB Fluorine plastic centrifugal pump, the IGF-type fluorine pipeline pump, PF-type corrosion-resistant centrifugal pump, CQB-F-type fluoroplastic magnetic pump, CQF-type plastic magnetic pump better 7. Saltwater (sea water) Ordinary steel in sodium chloride solution And seawater, salt water corrosion rate is not too high, the general shall be used paint protection; various types of stainless steel also have a low uniform corrosion rate, but may be due to chloride ions caused by localized corrosion, usually 316 stainless steel is better. Various types of chemical companies The pump has 316 material configuration, such as IH stainless steel chemical pump. 8. alcohols, ketones, esters, ethers common alcohol medium with methanol, ethanol, ethylene glycol, propanol, ketone medium with acetone , Butanone, etc., There are various types of methyl esters, ethyl esters, ethers medium ether, yi ether, butyl ether, their basic corrosion is not strong, so all can use ordinary stainless steel, the specific choice should be based on the media properties and It is worth noting that ketones, esters, ethers are soluble in a variety of rubber, the choice of sealing materials to avoid mistakes. Recommended to choose inorganic sealed fluorine plastic magnetic pump. There are many other media can not be This one by one introduction, in short, mature experience in the selection.

Molybdenum Bar has pure molybdenum,TZM and MLa molybdenum alloy bar, they have the properties of high melting point, good thermal conductivity and low thermal expansion. At high temperature, they can resist oxidation and have high strength without any distortion during the procession, etc. The molybdenum bar can suitable for producing ion implantation parts, electric light source parts, electric vacuum components, heating elements and refractory parts in high temperature furnaces, glass fiber industry, electrodes in the field of rare earth metal industry and so on.

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