Knowledge about selection of corrosion resistant centrifugal pump

Number of clicks：9232018-07-31 09:27:29　source: Shenzhou City Yueda Pump Industry Co.,Ltd.Industrial and mining slurry pumps, swirler and fittings, pump parts, rubber parts, polyurethane parts production, sales;

     Corrosion can be divided into two categories: wet corrosion and dry corrosion. Wet corrosion refers to the corrosion of metal materials in the presence of water, while dry corrosion refers to the corrosion in dry gas without liquid water. Wet corrosion is the most common cause in the chemical production of the atmosphere, and the damage caused by dry corrosion at high temperature can not be ignored.

     2. Hydrochloric acid medium is not resistant to hydrochloric acid corrosion of most metal materials, including various stainless steel materials containing molybdenum and ferrosilicon can only be used for hydrochloric acid below 50 C and 30 C. In contrast to metal materials, most non-metallic materials have good corrosion resistance to hydrochloric acid, so lining rubber pumps and plastic pumps, such as engineering plastics and fluoroplastics, are the best choice for hydrochloric acid delivery. Three Chang company applies fluorine plastic chemical pump series.The corrosion resistance of 

      3. nitric acid is most widely used in nitric acid. The most widely used nitric acid centrifugal pump has good corrosion resistance to all the nitric acid at normal temperature. It is worth mentioning that the corrosion resistance of stainless steel containing molybdenum, such as 316, 316L, is not better than ordinary stainless steel, such as 304, 321 sometimes. Not even as good as it is. For high temperature nitric acid, fluoroplastic alloy is usually used. The products of three Chang company are IHF type fluoroplastic chemical pump, FSB type fluoroplastic centrifugal pump, IGF type fluorine lining pump, PF type corrosion resistant centrifugal pump, CQB-F type fluoroplastic magnetic pump and so on.