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How to prevent vertical multistage centrifugal pumps from erosion and corrosion during industrial applications?
1. Choose the right material
Choosing the Right Material for Your Pump By choosing the right material for your pump’s construction, you can help mitigate the problems you face due to erosion and corrosion. For example, if you want to purchase a cast iron or carbon steel pump to reduce overall costs, be sure to factor corrosion rates into maintenance costs. If the calculated maintenance costs after including corrosion rates are acceptable, choose a carbon steel or cast iron pump. If this maintenance cost exceeds your budget, it may be necessary to pay extra and purchase a pump made of stainless steel and other materials with a long shelf life. Although some grades of stainless steel are more corrosion-resistant and corrosion-resistant, if the passivation layer is damaged, it will become susceptible to corrosion. When the passive layer (outer layer) is damaged, the base layer is activated, and then begins to corrode, and the stainless steel pump produces corrosion. Another main cause of corrosion effects is that the pump is in a stagnant state. In addition, if the chlorine content in the replacement fluid is high, it will have a corrosive effect on the stainless steel pump.
2. Protective coating
Protective coatings can significantly improve the durability and performance of industrial water pumps through the use of advanced coating technologies. Often, polymer coatings can be applied to pump components to reduce the effects of corrosion and erosion. In addition, polymer coatings also improve the hydraulic performance of the pumping process. Having said that, polymer coatings are not suitable for applications with high flow rates. In such cases, galvanic protection can be selected to reduce the effects of corrosion and erosion. , another popular coating is carbide coating, tungsten is used along with nickel, cobalt and chromium to provide corrosion resistance. With significant advancements in coating technology, overcoming the effects of corrosion and erosion to improve efficiency, with With reduced corrosion and erosion, maintenance costs can be eliminated through increased efficiency.
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