For many, connecting aluminum parts at home is a serious problem. The reason is that an oxide film appears in the stripping area that impedes bonding. In addition, aluminum has a low melting point, and only special techniques and strong fluxes can save the situation.
Solders familiar to many from bismuth and cadmium are very weakly in contact with aluminum, and best of all, this metal adheres to zinc, then the connection will be quite strong.
For aluminum parts to be soldered well, they must be properly cleaned from oxides and dirt with brushes, or you can use strong fluxes. It is also necessary to tin the treated part, which will prevent the formation of oxides. As for the tool, you can solder aluminum with an electric soldering iron, blowtorch or gas burner. Accordingly, there are three options: using rosin, solder, and the electrochemical method. If the details are small, rosin can be used. Most often it is used for fastening wires. When the wire is stripped, it must be covered with rosin, put on a piece of sandpaper of medium grain size, press the wire with a tinned tip of a hot soldering iron. You need to do this several times and then solder the wires.
It must be remembered that a soldering iron with a power of 50 W is suitable for soldering thin aluminum wires, but if the thickness is aluminum wires about 1 mm, then the power should be 100 V, if more than 2 mm - a preliminary warming up. Usually solder is used when it is necessary to connect or repair parts in an electrical engineer or a car.
Before you start soldering, you need to cover the treated area with alloy and connect the tinned elements. For such a case, it is recommended to purchase alloy compositions, since they allow heating parts only up to 400 degrees, respectively, the properties of aluminum do not change, and the hardness does not declining.
The electrochemical method is a copper plated wire. It is done like this. A bit of saturated copper sulfate is applied to the stripped area, then the negative pole of any independent power source is connected to the wire. It can be a battery, a battery, and the like. A stripped copper wire with a diameter of 1 mm is attached to the positive end. Thus, copper will begin to settle on the aluminum wire, after which it will be possible to proceed to tinning and drying with a soldering iron. After that, you can proceed to the connection.
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