How to solder aluminum

How to solder aluminum

Aluminum is a very attractive metal for constructing your own homemade structures: it is lightweight, perfectly processed, drilled, sawed, does not rust, etc. But here’s the problem: welding two pieces of aluminum without special argon welding is almost impossible. And the equipment for such welding costs more than one thousand rubles. But it turns out there is a way out! This is soldering! But not simple, but using special powder-rod solders.

Will need


So, what do we need to solder two parts to one another:

Rod solder for soldering aluminum can be found in technical stores for welding work. But due to its narrow focus, its application is quite difficult to find, and the price is quite expensive.
The most affordable way is to buy it at Ali Express - link to solder.
It's inexpensive there, take a pack right away - it will come in handy over time.
How to solder aluminum

This is what it looks like without packaging. An ordinary piece of wire in appearance, but not quite: inside this rod there is a special powder.
How to solder aluminum

The melting point is indicated in Fahrenheit; if we convert it to convenient units, it will be 370-400 degrees Celsius.
How to solder aluminum

We solder aluminum with our own hands


Let's proceed directly to soldering. First you need to prepare the surface of the metals. We take a coarse metal brush and clean the area of ​​future soldering.
How to solder aluminum

To be more precise, it is necessary not only to clean the surface from various dirt and oxides, but also to create a coarse roughness for better adhesion of the solder to the surface.
How to solder aluminum

Using this method, you need to clean both parts at the site of the future connection.
Now we fix the parts with a clamp and clamp everything in a vice for stability and reliability.
How to solder aluminum

We take a gas burner. Moreover, the thicker the metal, the more powerful the burner must be, capable of heating the parts to soldering temperature.
How to solder aluminum

We heat the connection.
How to solder aluminum

After some time, use the soldering rod to touch the heated parts for a second.
How to solder aluminum

If there is no melting, continue heating.
How to solder aluminum

Let's try again. And as you can see, the solder began to melt.
How to solder aluminum

Without removing the burner, spread the solder along the connecting seam. It spreads great.
How to solder aluminum

After the solder is evenly distributed, wait a couple of seconds for the solder to flow into all accessible places.
How to solder aluminum

Next, turn off the burner and wait for it to cool completely.
How to solder aluminum

Connection strength


Of course, this is not arc welding, but it holds up very well, no worse.
How to solder aluminum

I managed to break the connection only by breaking it! But here, it seems to me, the welding would have fallen off. So friends, the soldering method is reliable.

Conclusion


How to solder aluminum

In conclusion, I would like to say that this method can not only solder aluminum parts, but also repair products made of aluminum, duralumin, and silumin. By the way, in auto repair shops they often seal aluminum radiators, but they charge the same fee for welding work using argon.

Watch the video


Watch the video where you will see with your own eyes the entire process of soldering aluminum parts.
come back
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Comments (5)
  1. Guest Alexey
    #1 Guest Alexey Guests 23 August 2018 21:23
    4
    This is a Tsam1 zinc alloy, melt a carburetor from a Lada car, the same composition as this Tsam1 solder costs RUR 200 per kilo
    1. Alexander Chekmarev
      #2 Alexander Chekmarev Guests 24 August 2018 21:27
      1
      The carburetor is a Silumin alloy mixture of zinc and tin,
      or copper and tin
  2. Alexander Chekmarev
    #3 Alexander Chekmarev Guests 24 August 2018 21:24
    0
    Much needed original aluminum soldering, all thanks to the electrode
    1. Soldering TV antennas,
    2. Soldering refrigerators
  3. Guest Alexander
    #4 Guest Alexander Guests 24 August 2018 22:02
    0
    I have been soldering with cadmium all my life, anyone in the know knows how to handle it.
    1. Guest Oleg
      #5 Guest Oleg Guests February 18, 2019 00:21
      0
      Solder with cadmium - you can’t get it just like that