| Method of Soldering Aluminum. (1998) | |||||||||
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| An aluminum or aluminum alloy surface is coated with molten AgNO3, the silver nitrate is decomposed (at about 450 C-550 C) leaving a thin layer of silver metal, and then an inter-diffusion layer of silver and aluminum is formed (at about 570 C-660 C). The treated surface can be soldered by conventional means. Molten AgNO3 (MP 212 C) is coated on to the aluminum or aluminum alloy surface which is to be soldered. The molten AgNO3 is applied at a temperature above the melting point of AgNO3, but below the decomposition temperature of AgNO3. The surface is heated to keep the AgNO3 molten after it is applied. The molten AgNO3 wets and spreads out evenly over the aluminum surface. PAT-CL-228-193. (JS). Supersedes PAT-APPL-401 197-89. | |||||||||
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