Method for passive metal activation and uses thereof
AssigneeTechnion Research & Development Foundation Limited
InventorsYair Ein-Eli, Danny Gelman, Boris Shvartsev, Alexander Kraytsberg
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Abstract
Disclosed is a method for activating a surface of metals, such as self-passivated metals, and of metal-oxide dissolution, effected using a fluoroanion-containing composition. Also disclosed is an electrochemical cell utilizing an aluminum-containing anode material and a fluoroanion-containing electrolyte, characterized by high efficiency, low corrosion, and optionally mechanical or electrochemical rechargeability. Also disclosed is a process for fusing (welding, soldering etc.) a self-passivated metal at relatively low temperature and ambient atmosphere, and a method for electrodepositing a metal on a self-passivated metal using metal-oxide source.
Claims11
A method of welding a first metal object to a second metal object, at least one of said first metal object or said second metal object comprises a self-passivated metal, the method comprising:
- contacting a surface of said first metal object and/or said second metal object which comprises said self-passivating metal with a fluoroanion-containing composition that comprises a at least one [(HF)nF]− species, to thereby obtain an activated metal surface;
- melting at least one of the first metal object and/or the second metal object at said surface, and/or optionally melting a filler metal so as to fill an interface between the first metal object and the second metal object;
- and
- cooling the first metal object and the second metal object or cooling said filler, to thereby fuse the first metal object to the second metal object,
- wherein said fluoroanion-containing composition comprises a room temperature ionic liquid (a fluoroanion-RTIL).
Dependencies are inferred from the claim text.