Clay "cold welding": description and properties

The "cold welding" adhesive is a composition intended for joining parts without the use of a temperature effect. 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 sanitary engineering and car repair. The mixture has many advantages, among which, for example, there is no need for preparation.

Description

Cold welding adhesive can be single-component or two-component. The composition can include epoxy resins , metal components and additives. In the first case, we are talking about the ingredients that are needed to create uniformity and plasticity. If the composition includes metallic ingredients, they act as a filler. While the additive is sulfur, etc.,

The "cold welding" glue is a mixture with polymer ingredients. The strength will depend on the quality of the mixture, the surface preparation and the correct use. One should try to create ideal conditions under which the junction should be stronger than the base material, but in practice this is not always possible. Therefore, the described adhesive is used only for minor repairs.

Temperature characteristics

Quite often the consumer has a question about what level of temperature will be able to withstand the adhesive composition. On the package you will be able to find certain parameters, under which the composition will remain durable. The maximum possible temperature of inexpensive mixtures is, as a rule, 260 ° C or somewhat higher.

However, it must be remembered that the mixture will be strong only if it is used correctly. This indicates that the adhesive with a small maximum temperature must be used to repair the elements that will be used under normal conditions.

On the market you will be able to 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. Suitable formulations for joining surfaces that are constantly exposed to heat, because the use of traditional welding is sometimes difficult.

Types of cold welding

If you need a "cold welding" glue, then you should ask what kind of manufacturer the product delivers to the market. Domestic production is usually more affordable, but not of such a high quality. Therefore, experts recommend, if possible, to acquire the compositions of foreign manufacturers, including ABRO or Hi-Gear. The goods of domestic manufacturers "Almaz" and "Polymet" have proved to be good.

The composition of the glue and its consistency should distinguish between liquid and plasticine varieties of cold welding. The first type is two-component compounds, the mass of which must be mixed before use. Plasticine-like in appearance almost does not differ 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 a glue "cold welding" universal, it is intended for metal, car repair and welding under water. 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 metal, it will have a metal filling and will be able to cope with the welding of most metals.

If you have to work in difficult conditions, you should choose the appropriate composition, for example, one that is designed for welding under water. Temperature regime, in which the seam will be able to maintain strength, is also important. The higher the maximum temperature, the composition is stronger under all operating conditions.

Description and properties of epoxy composition

In the market you can also find epoxy glue-clay "cold welding". It is used to repair metals and their alloys. The composition is bicomponent and contains a hardener for epoxy resin. The composition is resistant to moisture, solvents and oils and does not change characteristics over time.

Bonded products can be used at temperatures ranging from -40 to + 150 ° C. Cold welding "epoxy adhesive" is simply mixed by hands, and the components are already selected in the right dosage. Plasticine after the purchase is fully ready for use. The viability of the mixture will be maintained for 5 minutes, so after mixing, the composition can be applied and the position of the parts adjusted. After one hour, the glued products can be machined, namely, grinding, turning and drilling.

Description and properties of cold welding "Almaz"

Cold welding adhesive "Almaz" hardens within an hour after application. The final strength of the mixture will reach in a day, after which the product can be subjected to structural loads. For reuse, the remaining glue can be wrapped in a film and packed in a tube.

Work with the mixture can be even in the case when the surfaces to be glued have a high humidity. In this case, the composition should be smoothed until you feel sticking to the surface. Before curing, the glue must be retained with a harness for 20 minutes. If it is necessary to accelerate the hardening process, the composition must be heated, for this you can use a household hairdryer. Work should be carried out in a well-ventilated area, the master should wear gloves. The composition of the glue contains:

• Epoxy resins;
• Mineral fillers;
• Hardeners;
• Iron fillers.

The peel strength is 120 kgf / cm², while the fracture temperature is 150 ° C. The Brinell hardness is 120 kgf / cm². The viability of the mixture is protected for 10 minutes, which is true at a temperature ranging from 20 to 30 ° C. Work should be carried out at a temperature not lower than + 5 ° С.

Cold welding for linoleum

The adhesive "cold welding" for linoleum is on sale in three varieties:

• Adhesive type A;
• Glue type C;
• Glue type T.

The latter is rarely used. Adhesive type A has a liquid consistency, since it has a high solvent content. This structure allows dissolving the edges for effective bonding. Fill this composition with large gaps will not succeed, because it is quite liquid.

The main advantage is the possibility of obtaining neat and almost unnoticeable seams. Cold welding adhesive type A is great for a new linoleum. If you cover the cover at home, the edges of the canvas can turn out not quite neat. In this case, it is better to purchase type C adhesive.

Description and properties of the adhesive type C

This glue contains more PVC and less solvent. The mixture is more saturated and dense, so that even large gaps and cracks can be filled with it. Ideal is a mixture for repairing old linoleum. When using this mixture, there is no need to adjust the edge of the sheets, gaps up to 4 mm in width are permissible. After drying, a firm and accurate 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 compound for connecting multicomponent linoleum on the basis of 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 the use of cold welding for metal "Thermo"

The aforementioned adhesive is cold welding for metal, it is a highly viscous metal-silicate composition. The formula of the mixture ensures the elimination of defects by the type of shells, cracks and chips. Use glue can be on metal parts made of cast iron, steel, titanium and other heat-resistant alloys.

Effective mixture in the repair of burnt out fragments of silencers and cracks without dismantling. After drying, the seam acquires high strength and water resistance, undergoes vibration and mechanical stress. Parts can be used at temperatures ranging from -60 to + 900 ° C.

Before use, the parts to be repaired must be cleaned of scale, rust and dirt, degrease the substrate with acetone or any other similar composition, and remove any traces of oil. The composition should be mixed until a uniform consistency is formed, and then applied to the surface with an even layer using a spatula.

Conclusion

As one of the main advantages of cold welding is the lack of the need for special training. The master should not have any skills, to achieve a positive result, it will only be enough to follow the attached instructions.