Frequent replacement of the Hastelloy C casted pump impeller used in corrosive service with Sodium Hypochlorite application. The existing impeller was always noticed with severe pitting corrosion damage and often required a quick turnaround to replace the parts back to service. With Additive Manufacturing (AM) Metallic Ti6Al4V Impeller solution, it helped to improve the part life together with a quick turnaround time. 3D printed Ti-6AL4V was found to have better corrosion properties and has superior mechanical properties over existing casted parts. The summary of test results of the 3D-printed part with standard corrosion test in the pumping media and test plan verification of mechanical properties are detailed in this presentation. 3D printing special Metallic materials are not always economical. The alternate solution to Additive manufacturing (AM) [Non-Metallic]?materials such as PEKK CF (23%) were also explored to replace special metallic materials like Titanium and Hastelloy for low-duty corrosive applications. Lessons learned from the material test and corrosion test are also discussed in this presentation.