Able COVID-19 Response

Able will remain fully operational during the “Shelter in Place” order by the State of IL in response to the COVID-19 Virus. Able Electropolishing has been deemed a critical service for the medical and defense industries so we are continuing our operations and should be exempt from any local, state or federal restrictions on business operations.

Learn More


1027 – Heat treated casting used in critical aerospace guidance system

#1027 Decorative/Brite Passivation



Aerospace - Manufacturer of aerospace electronic guidance instrumentation


Casting/Heat Treated - Housing


416 stainless steel


The part has a rough-scaled surface after casting. The scale is an oxide and a source for contamination. Our customer wants a clean scale free surface prior to machining. Electropolishing alone will not remove scale completely. The part is blasted with aluminum oxide media. Blasting is a very good method to remove investment casting scale. The 416 stainless steel surface has imbedded aluminum oxide after the blasting process. This is still a source of contamination.


We electropolished the part to remove any impurities and residual scale left behind after aluminum oxide blasting. The result is a clean surface finish prior to machining. After machining the part is passivated to insure further corrosion protection. Able Electropolishing has been part of this design process for over twenty-five years.

Note to engineer:Castings and especially investment castings can at times have problems with density or porosity. The presence of pores or flaws can render a machined casting worthless. Electropolishing has been used as a means to inexpensively “test” a casting prior to expensive machining operations. By electropolishing a casting, sub-surface flaws and pits are exposed. For more details, please call.

Download Electropolishing Case Study PDF

Contact Us to Learn More about Electropolishing

Request a QuoteDiscover the Able Electropolishing Difference »
Try Electropolishing for FreeSend Us Your Part to Process for Free »