METHOD FOR PASSIVE METAL ACTIVATION AND USES THEREOF
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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.
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Citations
115 Claims
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1-73. -73. (canceled)
- 74. A method of activating a surface of a metal or a metal alloy, the method comprising contacting the surface with a fluoroanion-containing composition, to thereby obtain an activated metal surface.
- 84. An electrochemical cell device comprising an anode, a cathode, and an electrolyte, wherein said anode comprises aluminum and said electrolyte being a fluoroanion-containing composition.
- 93. A process for fusing a first metal or a first metal alloy to a second metal or a second metal alloy, wherein at least one of said first metal or said second metal is a self-passivated metal, the process comprising contacting a surface of said first metal and/or said second metal being said self-passivating metal with a fluoroanion-containing composition, to thereby obtain an activated metal surface, melting at least one of the first metal and the second metal, and/or optionally melting a filler metal so as to fill an interface between the first metal and the second metal, and cooling the first metal and the second metal or cooling said filler, to thereby fuse the first metal to the second metal.
- 106. A method for electrodepositing a first metal on a surface of a second metal, the method comprising contacting the second metal with a fluoroanion-containing composition to thereby afford an activated metal surface, and depositing the first metal on said activated surface.
Specification