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Solder aluminum

February 20, 2014 Useful and interesting / Useful Tips 172 240 22

There are situations when it is necessary to solder aluminum products. But due to the fact that the oxide film covers the surface of aluminum, the solder simply does not stick to it. Currently developed solders and fluxes specifically designed for this purpose. But we will try, cope with this task in the old grandfather way.
Attention! Work should be carried out in a well-ventilated area, preferably equipped with active ventilation or outdoors.
To solder aluminum, we need machine oil (used to lubricate sewing machines), a small piece of sandpaper, rosin and ordinary solder for soldering radio parts.

A soldering iron is needed if possible powerful. For example, such. Its power is 65 watts.

We will solder the bottom of the aluminum beer can.
Before work, the soldering iron tip must be leveled with a file (remove all sinks) and tin.

With a piece of sandpaper we clean the place of soldering to shine.

Pour some oil into this place.

Next, rub the oil stain with sandpaper.

Thus, we remove the oxide film, and the oil does not allow the formation of a new film.
The soldering iron should be warmed up to working temperature by this time.
Dip the soldering iron tip into the rosin, pick up as much solder as possible, dip it into the rosin again and start quickly with a little effort to rub the future soldering spot. At the same time, the oil begins to burn out profusely. Therefore, we do not regret rosin. If everything was done correctly, then our tin layer should cover the surface of aluminum.

Sometimes, to achieve the desired result, you will need to repeat this operation several times.

The copper wire is soldered to tinned aluminum very easily.

Now try to tin and solder the aluminum wire. Remove insulation from it and clean it to a shine. Pour machine oil onto the tinned bottom of the can.

Next, the wire must be dipped in oil and rubbed with sandpaper.

Then we try to tear the wire right at the bottom of the can. If it turned out, then everything was done correctly. If not, work with sandpaper again.

The wire is also perfectly soldered to an aluminum can.

Instead of machine oil, you can use gun. If the aluminum part is large, you may need to warm it up additionally. For example, on an electric stove.

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Comments (22)

#1 Lyokhe Guests February 20, 2014 17:42
22

Thank you good article
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#2 Lybimoff Guests February 21, 2014 11:13
12

I am very glad that you liked my article.
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#3 Alex Guests May 17, 2014 11:58
6

Thank! Simple as that! and unexpectedly!
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#4 Jacob Guests April 10, 2015 14:06
10

Simple and logical!
But before that I had to THINK !!!
Thanks, I will definitely try
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#5 Michael Guests April 1, 2016 13:05
6

Thank you very much!
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#6 Andrei Guests December 13, 2016 15:13
3

Hey. What is the strength of tin aluminum brazing?

For example, I need to weld (or solder) a jumper tube between the rear feathers of a bicycle. The brakes will be attached to this jumper, that is, the unit is responsible and works under load.

The jumper will be set to the stop along the rotation of the wheel, but during braking there will be a torque capable of tearing the tube off its feathers by rotation.
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1. #7 yoy Guests January 8, 2019 05:50
  0
  
  with good welding skills, cook with electrodes. there is an esab-ok 96 on sale, the number is not sure what exactly. from my practice.
  
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2. #8 Guest Alex Guests January 26, 2019 07:31 a.m.
  0
  
  Better give it to the Argon driver
  
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#9 Alexey Guests August 7, 2017 9:19 p.m.
2

Hello, Andrey.
In your case, this method does not work.
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#10 Kamerunec Guests December 6, 2017 9:00 p.m.
4

Soldering aluminum with tinned metal chips is easier.
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#11 Boris Guests May 10, 2018 17:14
1

Instead of oil, beeswax is more effective (does not grease the surface).
Add silicon carbide powder (10-20 micron fraction).
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#12 Guest Sergey Guests May 14, 2018 20:07
2

Respect! At one time I came up with something similar, just simpler. I fill the surface not with oil, but directly with flux - liquid rosin (alcohol solution), I clean the soldering place in this puddle with the edge of the needle file (the main thing is to prevent air from getting to the surface), and tin a place.
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#13 Alec Sander Guests May 20, 2018 09:48
3

I made it even easier: I poured the powder remaining from the emery wheel onto the surface of aluminum. And then with a soldering iron through the rosin, rubbing the aluminum surface hard, tinning it. After this, soldering does not constitute any problem ...
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1. #14 saneck Guests June 13, 2018 10:39 p.m.
  4
  
  Do you understand what you wrote and what kind of soldering iron is needed?
  
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#15 Guest Nikolay Guests June 24, 2018 19:22
0

I used citric acid. powder.
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#16 Electrician. Guests July 4, 2018 2:59 p.m.
0

The method itself is interesting, there is a place to whip up in trifles. But seriously, a DSP (zinc-tin solder) is used, followed by a coating of PIC (tin-lead solder), stearin, a blowtorch or a gas burner.
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#17 Guest Alex Guests August 25, 2018 21:56
0

I don’t know how grandfathers were, but in Soviet times, when there were no special solders for aluminum, they used an aspirin tablet. It stinks of course disgusting, but dissolves the film on aluminum for one or two.
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#18 Guest alexander Guests September 10, 2018 21:01
0

instead of machine oil, you can use rosin dissolved in alcohol, adjust the consistency yourself.
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#19 Frozer Guests December 3, 2018 4:06 p.m.
0

aluminum is brazed with ordinary soldering acid. Moreover, no unnecessary fuss, no smoke and count almost odorless. The only negative, when soldering electronic components, you need to be careful, because the acid is conductive - no residues should remain.
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#20 Romanov Vyacheslav Anatolyevich Guests January 22, 2019 09:24
0

Thanks for the article. Explain.
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#21 Anatoly Guests February 16, 2019 06:14
0

thank
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#22 Guest Vladimir Guests March 20, 2019 08:16
0

Father soldered stainless (sheets of stainless steel, a tank of old washing machines such as Alma-Ata). From these tanks he cut out and made large pots, we fermented cabbage in them for the winter, one pot still works for me, water does not run. No oxides.
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