over 2 years ago

Depending on the type of job at hand, it is critical that your electric water pump is composed of the correct materials. When using an electric pump, corrosion can occur in a number of ways, so choosing the right pump material for the right job is critical.

Cast iron is the most common housing material you will find when looking for an electric pump. This is usually because cast iron is a relatively low cost metal in terms of production, but for more demanding applications, cast iron construction, especially in the impeller, can shorten the life of the pump. However, a cast iron housing with a bronze impeller assembly can be a good and cost-effective combination. See below for more details on bronze electric pump assemblies.

Stainless steel is corrosion resistant and is generally recommended for pumps that require service with a wide range of non-flammable liquids. Electric sump pumps, high volume centrifugal pumps and submersible pumps typically consist of stainless steel housings and drive hardware when they are rated for waste, sewage, solid or non-flammable chemical pumping tasks.

Among the common housing and impeller materials in electric water pumps, bronze (an alloy of copper and tin) can provide the best combination of cavitation resistance, cost, wear and corrosion resistance for almost any water, trash, solid or other Non-corrosive pumping operation. Bronze pumps are ideal for sea and warm water environments. In some cases, brass (an alloy of copper and zinc) pumps are more resistant to corrosion.

Aluminum is light (nearly one-third the weight of steel) and easy to cast, while also providing good durability and corrosion resistance. Aluminum pumps are often used in applications that require a highly portable pump for tough jobs.

More hazardous, corrosive or flammable applications require special alloys. In some low power applications, plastics can be used in place of alloys, but they have lower pressure limitations.

I hope this article has helped you understand the pros and cons of various materials, which will help you choose an electric water pump.