How to solder aluminum

Sometimes there is a situation that the old aluminum wiring is not possible to replace and you just need to perform a quality connection of aluminum and copper. To do this, of course, you can use special connectors, crimping or terminal blocks, but I want to tell you how to safely and efficiently to solder copper and aluminum.

What makes it difficult soldering

As is known, aluminum is a very active metal, and the interaction with the ambient air it is practically instantly covered with an oxide film, onaya just rejects the solder and does not allow just zaludit aluminum.

So that the solder is good "glued" to the metal you want to remove an existing film and give it a new form, until such time as you do not cause solder.

Especially for this purpose were devised: specialized fluxes actively using solder acid rosin mixture employed with acetone.

Cooking equipment

In order to successfully carry out this operation you will need: a soldering iron capacity of at least 60 watts, a knife, pliers, file or sandpaper, solder PIC PIC 61 or 50, flux F-64 or an analog thereof, a brush, sponge and rags.

Payaem aluminum tin and flux F-64

Important. Brazing conductive elements using P-64 and any analogue thereof according to the rules SEP prohibited. Since the use of acid causes not only the destruction of the oxide film, but also actively destroys itself metal, and after tinning this acid can not be removed and it continues destructive processes under solder.

In this way you can, for example, solder aluminum decorative detail.

By itself, the algorithm works with flux F-64 is very simple. First we clean the insulation on the aluminum conductor, then sandpaper or knife handle core itself in order to remove the thick film layer.

Then we put a brush flux on the stripped conductor and once we clean it is already submerged. Thus the flux prevents the formation of a new film.

Then already well-heated soldering iron begin to be applied to the prepared tin mine. In this case, if you rub a soldering iron solder.

Once you zaludit one track, once again apply flux and repeat the procedure. So you will be able to completely cover the solder wire and solder it in the future to the desired location or details.

Once you are fully treated veins must necessarily wash it in a soda solution (five tablespoons of baking soda per 200 grams of water). It is necessary to wash off the active substances, these should included in the F-64.

aluminum brazing using copper and tin rosin

In order to solder the conductive wires of copper and aluminum wire applied acid flux can not, and need to use the liquid rosin, onaya well as provide a reliable connection.

Such rosin can be purchased ready-made, but you can prepare yourself for this, you need to lump rosin (onaya pulverized) and pure alcohol. Then, these two components are mixed in a proportion of 60% rosin and 40% alcohol. Then put the vial in warm water, we wait until it warms up and thoroughly mixed until complete dissolution of rosin. All the solution is ready and it can be used.

It is also in addition to all of the above equipment, we still need to prepare a small capacity of the judges we immerse stripped wire end.

Just remove the isolation and clear the vein of a thick layer of foam, then immerse our bare end of the wire, so that he was completely in the liquid rosin with a knife once again treat vein.

Next take preheated soldering and start processing core at the surface of rosin, turning it on and taking as will obluzhivatsya wire.

Main feature lies in the fact that aluminum obluzhivalsya at the border between the rosin and the air so that the air does not oxidize it.

Keep the lost soldering temperature and remove it from the bath, if necessary, so that it is warmed up well.

Important. When this work stands out a lot of smoke, so it is better to make the open air or in a room with excellent mechanical ventilation.

Once you are tinned with aluminum, residual trace of rosin can be easily removed with a cloth soaked in alcohol. Then you can twist the tin-plated aluminum and copper wires in a classic twist and then solder it.

Tin will be an excellent converter galvanic interaction of copper and tin, and ensures that this connection will last very long and trouble-free.

Perhaps the only and essential disadvantage of such copper and aluminum compounds is the fact that perform soldering in junction box located under the ceiling and in the absence of a proper stock practically impossible.

In this case it is better to use other ways of connecting wires in the junction box.

That's all I wanted to tell you about aluminum brazing using special solders and a conventional tin rosin. Hopefully, this article will provide you with useful and interesting. Thanks for attention.

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