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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2. Electrochemical approach to electropolishing

This section describes the electrochemical principles underlying electropolishing. The analysis of the intensity-potential curves obtained is presented, since knowledge of these curves is essential for understanding the mechanisms involved, and for defining the treatment parameters.

2.1 Surface phenomena occurring during electropolishing

Electropolishing is an electrolytic process based on the anodic dissolution of a thin layer of metal. The purpose of this dissolution is to reduce surface roughness and improve surface homogeneity, thus giving the treated part its glossy properties. The technology, which works in the opposite way to electroplating, is therefore simple to implement, provided that the electrolyte composition and electrical parameters are adapted...

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Electrochemical approach to electropolishing

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Process parameters

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...