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US 12,703,925 B2Granted
Electrolyte and method for producing chromium layers
AssigneesMaschinenfabrik Kaspar Walter GmbH & Co. KG, Vopelius Chemie AG
InventorsThilo von Vopelius, Peter Schaale, Christoph Gschossmann
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Abstract
Disclosed is an electrolyte for the electrolytic deposition of chromium as a metal, comprising (a) a chromium (III) salt and (b) metallic chromium, the use of the electrolyte for producing chromium layers on rotationally symmetrical components, in particular gravure printing cylinders, and methods, in which this electrolyte is used.
Claims10
An electrolysis cell for the electrolytic deposition of chromium as a metal, comprising:
- an electrolyte filling the electrolysis cell;
- an anode immersed in the electrolyte;
- and
- a cathode immersed in the electrolyte, wherein the electrolyte comprises a chromium(III) salt and metallic chromium, wherein the metallic chromium is placed in an electric field of the anode and the cathode, wherein the metallic chromium is a metallic chromium nugget mounted on the anode such that the metallic chromium nugget is conductively connected to the anode;
- wherein the anode is a form-stable anode;
- wherein a surface area of the metallic chromium nugget is 1% to 50% of a surface area of the form-stable anode,
- wherein the chromium(III) salt prevents formation of Cr(VI) when the metallic chromium dissolves during electrolysis,
- wherein the electrolysis cell is devoid of a membrane separating the anode from the cathode.
5 more elements
Dependencies are inferred from the claim text.