Whitepaper: Pumps with Internal Coating

A Gorman-Rupp pump is primarily constructed from cast iron, sometimes using different types of materials. Cast iron offers many advantages for the manufacturing and use of pumps in a wide variety of applications, but it also has its limitations.

One of the most common limitations is corrosion resistance. Although cast iron (gray or ductile) has a unique natural corrosion resistance process called patination, the material is not ideally suited for pumping chemicals or chlorides. Patination is the result of the chemical composition of the cast iron material and its reaction to atmospheric exposure. A thin layer of iron oxide forms, often giving cast iron products their typical rusty appearance. This creates an impermeable layer that prevents deeper rust formation and delays further corrosion in standard water applications.

Is a coated pump the optimal solution?

In this whitepaper, we explain it.