Method for etching the surface of aluminum fragments, aluminum fragments with an etched surface and material composites containing such fragments

US11085117B2 · kind B2 · utility

Assignee

• Christian-Albrechts-Universitaet zu Kiel · DE

Inventors

• Melike Baytekin-Gerngross · Reutlingen, DE
• Mark-Daniel Gerngross · Kiel, DE
• Juergen Carstensen · Kiel, DE
• Rainer Adelung · Kiel, DE

Key dates

• Filing date: Jan 9, 2017
• Grant date: Aug 10, 2021
• Expiry date: Apr 26, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/0812
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for etching fragments of aluminum or an aluminum alloy comprising the steps of: a. providing a hydrochloric acid solution in a trough-shaped container; b. inoculating the hydrochloric acid solution by chemically dissolving an amount of aluminum to produce an etching solution; c. adding the fragments to the etching solution immediately after the inoculation; d. etching the fragments for 0.5 to 10 minutes while stirring in such a way that the fragments are entrained by the motion of the etching solution; e. stopping the etching by diluting the etching solution with water; f. removing the etched fragments; g. repeatedly rinsing the fragments with water and h. rinsing the fragments with an organic desiccant. An etched fragment of aluminum or an aluminum alloy and also to a composite material comprising etched fragments.