Radiator aluminum how to solder: step by step instructions and recommendations

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2020-01-03 21:00:18

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Most modern cars are equipped with aluminum radiators. This metal has light weight, good corrosion resistance and also has excellent conductivity. In addition, it is significantly cheaper than copper and brass, of which radiators were made earlier.

However, there is aluminum and disadvantage. If copper (brass) heat exchanger in the case of damage, it was possible to repair it yourself, sapaw problem area in the usual way, with the aluminum radiator this will not work. The thing in chemical characteristics of this metal. But nothing is impossible. In this article we will look at why flowing Aluminum radiator how to solder the problem area and what resources are required for this.Radiator aluminum how to solder

Some features of aluminium

For the manufacture of automotive heat exchangers of this metal was chosen not by chance. The fact that aluminum and most of its alloys have an oxide film, forming a natural barrier that protects against corrosion. This film has high temperature and chemical resistance. It is actively opposed to the usual fluxes and prevents the application of solder. It can destroy only with the help of mechanical surface treatment and special mixes. It is therefore difficult to recover the Aluminum radiator. How to solder and, most importantly, how to prepare it for this procedure, as we'll discuss later, but now let's consider the main reasons why most often the heat exchanger fails.

Main fault

Despite the fragility of the structure, the radiator may serve for years. His main enemies are of poor quality coolant or foreign objects that can cause mechanical damage. Tosol or antifreeze are not too active substances, capable of destroying the protective oxide film, and reaction with pure aluminum almost do not enter. But if the coolant is inconsistent with chemical standards, it promotes corrosion, causing the walls of the honeycomb devices are gradually destroyed.How to solder aluminum radiator

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Mechanical damage to the radiator most likely to occur when accidents, hitting curbs, stumps, etc. in addition, the device may be accidentally damaged during repairs to the vehicle. In any case, the result is the same – to flow from a broken honeycomb. The size of the holes determines the possibility of repair. If the heat exchanger is not much affected, and the size of the problem area is a few square centimeters, it is possible to try to recover. Another option to fix the radiator Aluminum (how to solder it let's see next) does not exist.

Get started

Repair of the heat exchanger begin with, drain the coolant and remove the device from the vehicle. Further, it is necessary to flush with clean running water and dry. If the damage to the radiator are visible, and you are sure that their with the exception of the whole device, you can start preparing the problem areas to repair. But if the exact location of the holes (cracks) is not known or known about, before How to solder aluminum radiator, you will need a more detailed inspection.

For its implementation we will need a large container with water (you can use the bath), the compressor or pump. The method of finding where the damage is similar to that by which are looking for a place of a puncture. Only here we need to close the lid of the device and all connections, except one (the thinner one). Immerse the device in water and served in air by a compressor or pump. The escaping bubbles will indicate the exact location of the injury.How to solder a car radiator at home

How to solder or glue the aluminum radiator

Proceed to the next stage. Finding the problem area and the scope for future work, it's time to think about how to prepare for the repair of the Aluminum radiator how to solder it properly and what tools and instruments are required for this. Immediately denote that the repair of automotive heat exchanger using household soldering iron and rosin will not work. Here need:

  • Powerful soldering iron;
  • Special flux or flux;
  • Solders of special composition;
  • Pliers;
  • Needle file set;
  • Sandpaper;
  • Acetone.

Let us Consider in more details the main tools and means.How to solder a radiator

Soldering iron

As for the soldering iron, it should have a capacity of at least 250 watts. Only such a tool can heat the metal surface, so that he could successfully connect to the solder. You can also use soldering irons that are heated with open flames. But the best option – a small gas torch (blow lamp) running on a mixture of propane butane. She easily warms the treated area and will melt any solder.

Flux

Before How to solder radiator have to take care of the flux. It provides a reliable solder connection and repaired metal surface. The flux can eitherbuy or make yourself. You can buy it at any store that specializes in selling electronic components. On the packaging of Russian flux designed for brazing of aluminum, there is usually a corresponding label. Their name may contain markings f-59A, f-61A, 34A, etc.

How to solder a car radiator at home without buying the flux? Is it possible to do it yourself? Yes, flux can be prepared with your own hands. He certainly would not have the same properties as factory, but it can handle it. For its production will need only two ingredients: rosin and iron filings. How to solder or glue the aluminum radiatorRosin is certainly in your home, and the shavings can be obtained by treating any iron piece with a file. All this must be mixed in a small fireproof pot and heat on the fire. The resulting mixture – the simplest flux for aluminum.

To get a more durable connection of the solder and metal, you can make a so-called smoother. To do this, mix the following materials in these proportions:

  • Potassium chloride – 56%;
  • Lithium chloride – 23%;
  • Cryolite – 10%;
  • Large salt – 7%;
  • Sodium sulphate – 4 %.

Ingredients you need to chop, mix and pour in a sealed glass container. Keep the flux in place, protected from direct sunlight.

Solder

To Use tin-lead solders for the soldering of aluminum is not recommended. And it is not in their structure or strength. The fact that they are not able to provide proper corrosion protection for the connection. If you do decide to use a regular solder, before How to solder aluminum radiator you have to care about getting a special varnish, which will protect the repaired area from corrosion.How to solder aluminum car radiator

But it is better to buy a special solder, designed for this metal. The market today you can find many compositions for brazing of aluminum containing silver, copper, zinc, silicon, etc. From inexpensive alloys of Russian production can be mentioned such compounds, such as TSOP-40 (tin – 60 per cent, zinc – 40%) and 34 A (aluminum – 66% copper-28%, silicon – 6%). The percentage of zinc in the solder determines the coupling strength and corrosion resistance. In other words, the more, the better.

How to solder aluminum car radiator with your hands

Go to the soldering process. First, the problem area is thoroughly cleaned with needle files and emery paper. If there are slats, they should be carefully removed with pliers. On the repair degreased with acetone.

When preparing for soldering is finished, you can apply flux. Then begin to heat the junction. If you are using a gas burner or blowtorch, ensure that flux is not burned out before their time. Soldering iron to apply it easier. It is sufficient to dip it work item in the mixture and transfer it to the surface.

Now it's time applying the solder. Better if it will be in the form of a rod or wire. Solder is applied to the connector and then carefully heated with a soldering iron (the burner). When it's evenly spread, you need to let it cool down, then it is advisable to apply a second (backup) layer. At the end of the work formed nodules can be removed with sandpaper.


Article in other languages:

AR: https://tostpost.com/ar/cars/20519-radiator-aluminum-how-to-solder-step-by-step-instructions-and-recommen.html

BE: https://tostpost.com/be/a-tamab-l/38162-radyyatar-alyum-n-evy-yak-zal-tavac-pakrokavaya-nstrukcyya-rekamendacy.html

DE: https://tostpost.com/de/autos/37773-aluminium-k-hlk-rper-wie-l-ten-schritt-f-r-schritt-anleitung-und-tipps.html

ES: https://tostpost.com/es/coches/37559-el-disipador-de-calor-de-aluminio-como-de-soldadura-paso-a-paso-las-in.html

HI: https://tostpost.com/hi/cars/22192-radiator-aluminum-how-to-solder-step-by-step-instructions-and-recommen.html

JA: https://tostpost.com/ja/cars/20171-radiator-aluminum-how-to-solder-step-by-step-instructions-and-recommen.html

KK: https://tostpost.com/kk/avtomobil-der/38570-alyuminiy-radiator-ret-nde-zapayat-adamdy-n-s-auly-zh-ne-synymdar.html

PL: https://tostpost.com/pl/samochody/40114-ch-odnica-aluminiowa-jak-powiedzia-em-krok-po-kroku-instrukcje-i-zalec.html

PT: https://tostpost.com/pt/carros/39772-radiador-de-alum-nio-como-solda-a-passo-as-instru-es-e-recomenda-es.html

TR: https://tostpost.com/tr/arabalar/35027-radyat-r-al-minyum-gibi-lehimli-ad-m-ad-m-talimatlar-ve-neriler.html

UK: https://tostpost.com/uk/avtomob-l/38971-rad-ator-alyum-n-viy-yak-zapayati-pokrokova-nstrukc-ya-ta-rekomendac.html

ZH: https://tostpost.com/zh/cars/28040-radiator-aluminum-how-to-solder-step-by-step-instructions-and-recommen.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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