In the vastness of our beloved Chinese marketplace, you can find many amazing innovations. One of which is universal, low-temperature welding rods for soldering various metals: copper, aluminum, steel, etc. There are a lot of different reviews on this topic on video hosting sites. But are these welding rods any good? Let's run some tests.
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How to perform soldering with a low-temperature welding rod
For work related to melting them, both a simple gas burner and an ordinary household soldering iron are suitable. We will test the capabilities of this soldering method using special rods on several aluminum workpieces using both sources of thermal energy.
Let's start with the process of soldering several holes of different diameters in an aluminum plate measuring 40x2 mm. Before soldering, carefully remove the oxide film from the surface of the workpiece, for example, with sandpaper, although, according to the instructions for use, this operation is not necessary.
First, using a gas burner flame, we heat the plate material in the soldering area. To do this, we use an ordinary gas burner. Then we melt the tip of the rod, solder the holes in the plate and leave the soldering for a while to cool and harden.
A partially melted rod should be handled with care: it has a tendency to spontaneously heat up and melt, releasing a large amount of heat. Also, this produces a gas of unknown composition with a very unpleasant odor, so soldering with them must be carried out in the open air or in a well-ventilated area with natural or artificial ventilation.
Let's try to solder a fragment cut from an aluminum can with a soldering iron using the above rods. To do this, make an incision in it with the tip of a knife and melt the rod.
We repeat the same operation with respect to the cut made by the grinder in the aluminum plate. In this case, the heating is sequentially carried out first with a soldering iron, and then completed with a gas burner.
What result?
Mechanical deformation, even with the fingers of the hand, of the place where a fragment of an aluminum can is soldered does not show very encouraging results. The instructions for using the rods note that soldering with these rods can be easily processed with a hand file and even cut and trimmed with a simple knife.
Probably, soldering with special rods is not suitable for dishes that are placed on fire, especially since it is not suitable for soldering automobile and other radiators. Its scope of application is limited to aluminum buckets and other containers for storing and transporting non-hot liquids that are not under pressure.
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