Anti - corrosion Technology of Chemical Axial Flow Pump

Application of Chemical Axial Pump Pump Shaft Thermal Spraying Stainless Steel Anti-corrosion Technology
    The use of anti-corrosion coating coating current protection technology, the chemical axial pump, submerged pump pump shell anti-corrosion effect is ideal, but the chemical axial flow pump, submerged pump pump shaft as a whole is rusty, accompanied by large area erosion, impeller and shaft Of the joint parts of the Hafu lock is particularly serious corrosion, the entire spindle head shoulder was peeling off, if the operation of a period of time the impeller may fall off lead to accidents.
    Design requirements of chemical axial pump, submersible pump work, the shaft casing filled with fresh water, but the actual operation, fresh water, shaft casing is often seawater intrusion, the pump shaft in the sea water medium, the pump shaft will be serious Seawater corrosion and galvanic corrosion. As the shaft casing of the electrical shielding effect, making the external current cathodic protection system protection current can not reach the pump shaft, the pump shaft can not play a protective role.
    To protect the chemical axial pump, submerged pump shaft, the chemical axial pump, submerged pump shaft using a thermal spray stainless steel coating with closed technology. The process is: a sand blasting rust → fresh water rinse → secondary blasting rust → thermal spray stainless steel 1Cr18Ni9Ti → coating closed; require spraying thickness of 250 μm or so. After the implementation of the process 3 years, check the chemical axial pump, submerged pump pump shaft surface is basically intact, in addition to Hafu lock ring under the spindle corrosion, the pump shaft corrosion has been effectively controlled.