Surely those who have ever repaired cars, central heating pipes, plumbing, etc., have come across such a concept as cold welding for metal, and will surely say that this is such a two-component adhesive with the addition of metal powder. On the one hand, this is true, but on the other hand, such an answer would be incomplete, since this concept also has another meaning.
1. Cold plastic welding
According to the existing GOST 2601-84, cold welding of metal is welding performed without the use of any heat sources, the connection of metal parts in which occurs due to significant plastic deformation resulting from mechanical action on the elements to be joined.
This type of welding is used to join parts made of copper, nickel, lead, silver, cadmium, iron. This method is especially effective for fastening parts made of dissimilar metals or when using metals that are sensitive to heat. Cold plastic deformation welding can be spot, seam or butt.
Soldering elements using this method is a rather complicated process and requires special equipment, and therefore another method has received the most distribution (especially in everyday life).
2. Cold welding for epoxy based metal
This method is unique in that it allows you to connect parts from a wide variety of materials: metal, ceramics, plastic, glass, wood, etc.
Cold welding for metal available on the market today, the price of which usually does not exceed one hundred rubles, is available in various packaging options: sticks, jars, tubes. But, regardless of the version, it is necessarily based on epoxy glue with the addition of metal powder to give it special strength. In addition, all kinds of fillers, modifiers, plasticizers, etc. are added there. In any case, cold welding for metal has two components in its composition - resin and hardener, after mixing which the hardening process begins.
Because this type of welding is quite hermetic, it is often used to repair pipelines, gas tanks, radiators (including central heating radiators).
Cold welding for metal: instructions for use
Depending on the type and manufacturer, it can be produced in two tubes or jars, which must bemix with each other. The most practical option is cold welding for bar metal.
It's easy to use. First of all, you need to prepare the surfaces to be fastened, which must be cleaned of dirt, if possible washed and degreased. For this, gasoline or any solvent is suitable. Then, with wet hands, take the required amount of welding and knead it in your hands for about 3-5 minutes, until it resembles plasticine in its consistency. After that, apply it to the parts to be joined and press. If necessary, remove excess welding with a spatula. Complete drying of cold welding occurs in a day, after which the product can be safely used.
