Dosing pumps in the choice of material, should pay attention to the following aspects:
First, sulfuric acid I think we all understand it, sulfuric acid is one of the most powerful corrosive media, mainly used in a very wide range of important industrial raw materials, different concentrations and temperatures of sulfuric acid corrosion of the material is a big difference, Also for the concentration of 80% or more, the temperature
Second, hydrochloric acid is the most of the metal material is not resistant to hydrochloric acid corrosion [including a variety of stainless steel], molybdenum high ferrosilicon can only be used at 50 ℃, 30% hydrochloric acid and metal materials are the opposite. The vast majority of non-metallic materials have good corrosion resistance to hydrochloric acid, so lined with rubber pumps and plastic pumps such as polypropylene, fluoroplastic, etc., are the best choice for the delivery of hydrochloric acid. Applicable products are: IHF fluoroplastic dosing pump, PF (FS) strong corrosion-resistant centrifugal pump, CQ polypropylene magnetic pump (or fluorine plastic magnetic pump) and so on.
Third, the nitric acid is generally the metal most of the nitric acid in the rapid corrosion damage, stainless steel is the most widely used in nitric acid-resistant materials, all concentrations of nitric acid at normal temperatures have a good corrosion resistance, referring to the containing Mo-containing stainless steels [316, 316L] and nitric acid corrosion resistance are not only inferior to ordinary stainless steel [304,321], sometimes even worse. For high-temperature nitric acid, titanium and titanium alloys are generally used. The use of these products are: IHG, ISWH dosing metering pump, IH dosing metering pump, CQB magnetic pump, the material is 304.
Fourth, acetic acid It is one of the most corrosive organic acids, one of the most powerful substances, ordinary steel in all concentrations and temperatures of acetic acid will have very serious corrosion, stainless steel is an excellent acetic acid-resistant materials, containing molybdenum 316 stainless steel can also be used for high temperature and dilute acetic acid steam. For high temperature and high concentration of acetic acid or containing other corrosive media and other harsh requirements, you can choose high-alloy stainless steel pump or fluorine plastic pump.
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