Electropolishing process for titanium

a technology of electrolysis process and titanium, which is applied in the direction of electrolysis process, electrical equipment, electrical machining apparatus, etc., can solve the problems of the use of titanium electrodes involves substantial technical and health risks, and the quality of the electrodes is not satisfactory
US20080217186A1Inactive Publication Date: 2008-09-11POLIGRAT GMBH
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
POLIGRAT GMBH
Publication Date
2008-09-11
Estimated Expiration
Not applicable · inactive patent
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Abstract

The present invention relates to a method of electrochemical polishing of surfaces of titanium or titanium-containing alloys, such as Nitinol. An electrolyte is used that comprises methanesulfonic acid and one or more alkanediphosphonic acids. These alkanediphosphonic acids can optionally be substituted with hydroxy and / or amino groups. A further aspect of the present invention relates to the use of said electrolyte for the electropolishing of titanium or titanium-containing alloys.
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Description

[0001] The present invention relates to a method of electrochemical polishing of surfaces of titanium or titanium-containing alloys. This method is especially suitable for alloys that have a titanium content of at least about 50 mol. %, for example the nickel-titanium alloy Nitinol. For this, an electrolyte is used that comprises methanesulfonic acid and one or more, optionally substituted alkanediphosphonic acids. The present invention also relates to the use of said electrolyte for the electropolishing of surfaces of titanium and / or titanium-containing alloys, such as Nitinol.BACKGROUND OF THE INVENTION

[0002] Electrochemical polishing or electropolishing, as well as the brightening and deburring of metal surfaces, is a process that is frequently employed in industry for treatment of the surfaces of metal workpieces and objects. This treatment is used for improving surface quality, for example by removing burrs from edges and surfaces, by smoothing, cleaning and brightening, both for...

Claims

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