Depending on the type of work at hand, it is essential that your electric water pump
is made of the correct materials. When using an electric pump, corrosion can occur in many ways, so it is important to choose the right pump material to complete the right job.
Cast iron is the most common housing material when looking for electric pumps. This is usually because cast iron is a relatively low-cost metal in production, but for more demanding applications, cast iron structures (especially those in the impeller) may shorten the life of the pump. However, a cast iron housing with a bronze impeller assembly can be a good and cost-effective combination. For more detailed information on the bronze electric pump components.
Stainless steel has corrosion resistance and it is usually recommended to be used in pumps that need to be used for a variety of non-flammable liquids. Electric sewage pumps, large-capacity centrifugal pumps and submersible pumps are usually composed of stainless steel housing and driver hardware, and they are rated for the pumping tasks of garbage, sewage, solid or non-flammable chemicals.
Among the common housing and impeller materials you usually find in electric water pumps, bronze (an alloy of copper and tin) may provide the most cavitation resistance, cost, wear resistance and corrosion resistance for almost all water, garbage and solids. Good combination or other non-corrosive pumping operations. The bronze-constructed pump is very suitable for use in seawater and warm water environments. In some cases, brass (alloy of copper and zinc) pumps are more resistant to corrosion.
Aluminum is light (close to one-third the weight of steel), easy to cast, and has good durability and corrosion resistance. Aluminum pumps are often useful in applications that require highly portable pumps to do hard work.
In more dangerous, corrosive or flammable applications, special alloys are required. In some low-power applications, plastics can be used instead of alloys, but their pressure limits are lower.
I hope this article will help you understand the advantages and disadvantages of various materials, and hope it will help you choose an electric water pump.