The Core Solution For Dealing With Corrosive Conditions

Many enterprises often encounter problems with corrosion and leakage of the flow components of split-case pumps when transporting acidic and alkaline solutions, chlorine-containing media, or seawater and other corrosive media - ordinary stainless steel split-case pumps will develop pitting corrosion and cracking within a few months, and frequent replacements not only increase costs but also delay production.
2205 duplex steel is a high-quality material specifically designed for corrosive conditions. It combines the advantages of austenitic and ferritic stainless steel, containing 22% chromium, 5% nickel, and additional molybdenum elements. Its resistance to pitting and crevice corrosion far exceeds that of 304 and 316 stainless steel, and its strength is more than twice that of ordinary stainless steel. Using this material for the impellers, pump bodies, volutes, and other flow components of split-case pumps, even when continuously transporting acidic and alkaline media with a pH value of 1-14 or industrial wastewater containing chloride ions, it can effectively resist corrosion and extend the pump's service life.
Not only will the material be replaced, but it will also be precisely optimized according to the actual working conditions. First, the composition, temperature, pressure, flow rate, etc. of the medium will be thoroughly understood. For example, when transporting dilute sulfuric acid at 80°C, the processing technology of 2205 duplex steel components will be adjusted to improve surface accuracy; for high-head working conditions, the hydraulic design of the impeller will be optimized to ensure corrosion resistance while maintaining efficient operation. At the same time, the sealing method will also be customized and matched, such as using mechanical seals and flushing schemes to avoid corrosion of the sealing surface by the corrosive medium and reduce leakage risks.
This customized 2205 duplex steel corrosion-resistant split-case pump is particularly practical in industries such as chemical engineering, metallurgy, seawater desalination, and environmental treatment. For example, a chemical enterprise previously used ordinary split-case pumps to transport chlorine-containing wastewater, replacing the impeller once a month. After customizing the 2205 duplex steel version, it has been used continuously for more than a year without significant corrosion, operating stably and worry-free.