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Cleaning of AISI 316L finished parts

Dear friends,

We deal with small parts machined from very thin (about 0.5mm) sheets of AISI 316LVM. Unfortunately after electropolishing they require further heavy manipulations. In spite of all our efforts in keeping parts and environment clean, the final parts result "dirty". At SEM inspection both organic and inorganic contaminants can be found: not all of them are soluble in detergents. Our approach is setting an ultrasonic cleaning procedure based on strong oxidizing agents. Good results has been obtained with sodium hypoclorite, but we would avoid chlorine due to the presence of stainless steel. We are thinking at ammonium persulfate. Any suggestion or comment?

Thanks in advance.

Gio Righini
- Mazzè, Italy

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