Aluminum soldering. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies
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For soldering aluminum with conventional tin-lead POS solders, the method proposed by foreign radio amateurs and verified by the author of this note, which is as follows, can be recommended.
Liquid mineral oil is applied to the aluminum in the soldering bridge, and the surface of the aluminum under the oil layer is cleaned with a scraper or a knife blade to remove the existing oxide film. Solder is applied with a well-heated soldering iron. For soldering thin aluminum, a soldering iron with a power of 50 W is sufficient, for aluminum with a thickness of 1 mm or more, it is desirable to use a soldering iron with a power of 90 W. If the solder does not adhere to the metal, the tinning process must be repeated.
The best results are obtained in the case of using alkaline oil for cleaning weapons after firing, good and satisfactory soldering quality is provided by mineral oil for sewing machines and precision mechanisms, vaseline oil and Universal oil.
The solder must contain at least 50% tin, the most convenient for work is POS-61 low-melting solder. Solder POS-30 does not provide good soldering quality.
When soldering aluminum with a thickness of 2 mm, it is advisable to preheat the place of soldering with a soldering iron before applying oil.
This method can be used to solder the mounting wires to the cases of electrolytic capacitors without disturbing their performance.
Author: J. Bite, Riga; Publication: N. Bolshakov, rf.atnn.ru
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