Chemical polishing bath for aluminum and aluminum alloys, and method using such a bath

Abstract

A chemical polishing bath for polishing a part made of aluminum or of aluminum alloy, or a portion of such a part, which bath includes an oxidizing agent capable of attacking the aluminum, chosen from nitric acid, hydrogen peroxide, permanganate, or a mixture thereof, at a concentration between 1.2 and 3.0 mol/L. The polishing bath also includes a fluoride complexing agent capable of forming a complex with the oxidized aluminum, at a concentration between 0.3 and 1.6 mol/L; a catalyst (Cu); and phosphoric acid at a concentration between 10.10 and 14.30 mol/L and also sulfuric acid at a concentration between 1.50 and 3.60 mol/L. The bath is particularly suitable for polishing parts resulting from additive manufacturing (3D printing).

Dependencies are inferred from the claim text.