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topic 60892

Vibratory finishing leaves smut on stainless steel

November 13, 2018

Q. I recently purchased a Rosler E420 Vibe Bowl and Z800 Centrifuge. The equipment was purchased to debur some long thin flat 302 stainless parts. The deburring process is working well, but we are getting a gray smutty surface film on the parts that does not come off during passivation. Any ideas on how to eliminate the smut?

Kurt Dube
Engineer - Southington, Connecticut


November 15, 2018

A. Kurt,
I'd reach out to your chemical vendor. I've seen smut on brass vibratory processes before and we pumped a low concentration specialty cleaner recommended by our vendor through and it cleaned them all right up. I had tried some homebrew acid mixes and other burnishes first and nothing was nearly as effective.

Jameson Grout
- Agawam, Massachusetts


December 8, 2018

A. Are your parts flat? If they nest during the processing, then you may want to look into dry organic abrasive process media

tony kenton
AF Kenton
Hatboro, Pennsylvania


December 10, 2018

Q. The parts are flat and narrow. .030 thick x .128 wide x 5-1/2 long. I've been working with a local chemist to come up with a solution to remove the smut. Conventional alkaline cleaners and nitric have not done a very good job in removing the smut. So far we found ultrasonic cleaning with a special formulated cleaner design to help remove the smut to be the best solution.

Kurt S. Dube [returning]
Medical Components - Southington, Connecticut, USA



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