Glue "cold welding" is a composition designed to connect parts without the use of temperature effects. Bonding is carried out due to plastic deformation of the mass and its penetration into the surface. This method has found its wide distribution in the field of plumbing and car repair. The mixture has many advantages, among which, for example, the absence of the need for training.
Description
Cold welding glue can be one-component or two-component. The composition may include epoxy resins , metal components and additives. In the first case, we are talking about the ingredients that are necessary to create uniformity and plasticity. If the composition includes metallic ingredients, then they act as a filler. Whereas the additive is sulfur, etc.
Glue "cold welding" is a mixture with polymer ingredients. Strength will depend on the quality of the mixture, on surface preparation and proper use. You should try to create ideal conditions under which the joint should be stronger than the base material, but in practice this is not always possible. Therefore, the described glue is used only for a small repair.
Temperature characteristics
Quite often, the consumer has a question about what level of temperature the adhesive composition will be able to withstand. On the packaging you can find certain parameters, subject to which the composition will remain strong. The maximum possible temperature of inexpensive mixtures, as a rule, is equal to 260 ° C or slightly more.
However, it must be remembered that the mixture will be durable only if used correctly. This indicates that glue with a small maximum temperature must be used to repair items that will be used under normal conditions.
On the market you can find glue that will be able to undergo a higher temperature, it is called high-temperature cold welding. Such mixtures will retain their characteristics at temperatures up to 1316 ° C. These compounds are suitable for joining surfaces that are constantly exposed to heat, because the use of traditional welding is sometimes difficult.
Varieties of cold welding
If you need glue “cold welding”, then you should ask what manufacturer supplies the product to the market. Domestic products are usually more affordable, but not of such high quality. Therefore, experts recommend, if possible, to purchase compositions of foreign manufacturers, including ABRO or Hi-Gear. Well-proven products of domestic manufacturers "Diamond" and "Polymet."
The composition of the glue and its consistency should distinguish between liquid and plasticized varieties of cold welding. The first type is a two-component composition, the mass of which must be mixed before use. Plasticine in appearance are almost no different from ordinary plasticine. They have the appearance of a single-layer or two-layer bar. In the latter case, the mass is mixed before use.
Still on sale there is universal cold welding glue, it is designed for metal, car repair and underwater welding. The first variety can be used for working with metal, wood and polymers. These compounds are the most durable. If you buy a mixture for the metal, then it will have a metal filling and will perfectly cope with the welding of most metals.
If you have to work in difficult conditions, then you should choose the appropriate composition, for example, one that is designed for welding under water. The temperature regime in which the seam will be able to maintain strength is also important. The higher the maximum temperature, the stronger the composition under all operating conditions.
Description and properties of epoxy
On the market you can also find glue-plasticine epoxy “cold welding”. It is used to repair metals and their alloys. The composition is two-component and contains a hardener for epoxy resin. The composition is resistant to moisture, solvents and oils and does not change characteristics over time.
The products to be glued can be used at temperatures ranging from -40 to + 150 ° C. Cold welding "epoxy glue" is simply mixed by hand, and the components are already selected in the right dosage. Plasticine after the acquisition is completely ready for use. The mixture will remain viable for 5 minutes, so after mixing the composition can be applied and the position of the parts corrected. After an hour, the glued products can be machined, namely, stripping, turning and drilling.
Description and properties of cold welding "Diamond"
Glue cold welding "Diamond" hardens within an hour after application. The mixture reaches its final strength in a day, after which the product can be subjected to structural loads. For reuse, the remaining glue can be wrapped in foil and packaged in a tube.
You can work with the mixture even when the surfaces to be bonded have high humidity. In this case, the composition should be smoothed until you feel sticking to the surface. Prior to hardening, the adhesive must be held in place for 20 minutes with a plait. If necessary, accelerate the hardening process, the composition must be heated, for this you can use a household hair dryer. Work must be carried out in a well-ventilated area, the master should wear gloves. The glue contains:
- epoxy resins;
- mineral fillers;
- hardeners;
- iron fillers.
The tensile strength is 120 kgf / cm², while the fracture temperature is 150 ° C. Brinell hardness is 120 kgf / cm². The mixture protects viability for 10 minutes, which is true at temperatures ranging from 20 to 30 ° C. Work should be carried out at a temperature not lower than + 5 ° C.
Cold welding for linoleum
Glue "cold welding" for linoleum is on sale in three varieties:
- adhesive type A;
- adhesive type C;
- glue type T.
The latter is rarely used. Type A glue has a liquid consistency, as it has a high solvent content. This structure allows you to dissolve the edges for effective bonding. It will not be possible to fill large gaps with this composition, because it is quite liquid.
The main advantage is the ability to obtain neat and almost invisible seams. Type A cold glue is great for new linoleum. If you cut the coating at home, then the edges of the paintings may not be completely neat. In this case, it is better to purchase type C glue.
Description and properties of adhesive type C
This glue contains more PVC and less solvent. The mixture is more saturated and thick, so even large gaps and cracks can be filled with it. This mixture is ideal for repairing old linoleum. When using this mixture, there is no need to adjust the edges of the sheets; gaps up to 4 mm wide are permissible. After drying, a durable and neat seam is formed, which will be difficult to notice.
Description of adhesive for cold welding type T
This glue is cold welding for linoleum, which is used quite rarely. Suitable composition for joining multicomponent linoleums based on PVC and polyester. Using this type of welding allows you to achieve a reliable, accurate and elastic seam. Suitable composition even for gluing semi-commercial linoleum.
Features of using cold welding for Thermo metal
The aforementioned adhesive is cold welding for metal, it is a high-viscosity metal-silicate composition. The formula of the mixture eliminates defects like shells, cracks and chips. You can use glue on metal parts made of cast iron, steel, titanium and other heat-resistant alloys.
An effective mixture in the repair of burnt fragments of silencers and cracks without dismantling. After drying, the seam gains high strength and water resistance, undergoes vibration and mechanical stress. Parts can be used at temperatures ranging from -60 to +900 ° .
Before use, the repaired parts must be cleaned of scale, rust and dirt, degrease the base with acetone or any other similar compound, remove traces of oil. The composition should be mixed until a uniform consistency is formed, and then applied to the surface in an even layer using a spatula.
Conclusion
One of the main advantages of cold welding is the absence of the need for special training. The master should not have any skills, to achieve a positive result it will be enough only to follow the attached instructions.