Article | REF: M1635 V1

Electropolishing -Tool for post-processing of metallic additive manufacturing parts

Authors: Marie-Laure DOCHE, Jean-Yves HIHN

Publication date: October 10, 2021

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5. Review of electrolytes and processes for the treatment of additive manufacturing parts

The literature on the electropolishing of alloys produced by additive manufacturing mainly features laboratory-scale studies aimed at testing the action of new, often milder, electrolyte formulations and defining the associated electrical treatment parameters. Only a handful of studies have been carried out on a pilot or semi-industrial scale, taking into account part geometry.

5.1 SLM stainless steels

The process is used extensively on an industrial scale on AISI 300 series stainless steels (for example, for the processing of medical devices, often in large series), and can be transferred to additive manufacturing parts, with some adaptation of practices due to the complexity of the parts. The electrolytes generally used are mixtures of acids (phosphoric, sulfuric...

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Bibliography

(1) - JACQUET (P.A.), FIGOUX (H.) - Perfectionnement aux traitements électrolytiques des métaux. - Brevet Français, n° 707526 (1930).
(2) - CHAISE (T.), ELGUEDJ (T.), GIRARDIN (F.), MARTINI (L.), NOEL (N.), TARDIF (N.) - Parachèvement de surface Généralités....

Standards and norms

Geometric product specification (GPS) – Surface finish: profile method – Terms, definitions and surface finish parameters. - NF EN ISO 4287 - décembre 1998
Geometric product specification (GPS) – Surface finish: profile method – Terms, definitions and surface parameters – Amendment 1: number of peaks. - NF EN ISO 4287/A1 - août 2009
Geometric product specification (GPS) – Surface finish: surface – Part...

Patents

Cerium electrolytic oxidation process and electrolysis unit for its implementation CA2582058.

Electrolyte for electrochemically polishing metallic surfaces EP1625246A2 (2003).

Method for electropolishing and/or electrochemical deburring of surfaces made from titanium or titanium-containing alloys comprises using an electrolyte made from methane sulfonic acid or one or more alkane...