Choosing how to glue metal to metal. How to choose a heat-resistant adhesive for metal bonding: types and tips for choosing High-strength metal adhesive

Metal is strong and durable substance, which is not so easy to connect with each other. A few decades ago, it was quite difficult to glue the surfaces of this material. Many companies now produce metal adhesive with excellent cohesive resistance. What should be the adhesive base and how to glue steel products correctly?

How to choose a good glue

Today, many varieties of glue for bonding metals are made. The best among them are metal adhesives with high level viscosity. When choosing a binding mass, its safety for human health is of considerable importance - some products release toxic substances during hardening.

A good adhesive base for joining steel products should meet all technical principles qualities:

• maximum strength and reliability;
• longevity;
• resistance to maximum temperature changes;
• water resistance;
• lack of expansion and shrinkage during curing;
• anti-corrosion protection.

In order to reliably glue metal, when choosing, it is necessary to take into account the appropriate physical and mechanical properties and geometric shapes compatible surface. The binding base should reduce the difference between elasticity and coefficient of thermal expansion.

To find out more watch the video:

The best option when choosing an adhesive is a viscous substance that can connect a metal material not only with each other, but also with various non-metallic surfaces.

Types of glue for metal products

Often, when connecting two materials at home, the question arises of how to glue metal to metal firmly and for a long time. On sale there are many adhesives produced various firms. They can consist of two or one component, as well as additional impurities, and be applied to the entire area of ​​the parts to be glued or pointwise.

The most effective and popular adhesives are:

• epoxy adhesive. It consists of resins, curing accelerators and fillers. Epoxy adhesive mixtures can be liquid and pasty. Basically, they include two components that are mixed before use. This adhesive is heat-resistant and water-resistant, and also has good wear resistance;
• universal super glue for metal - "Moment of Super Epoxy Metal". It is designed for combined bonding of all types of metal surfaces. The composition of the adhesive includes epoxy resins and hardeners. It is used to glue steel products to different surfaces. Superglue is frost-resistant and resistant to solvents and oily substances. They are easy to apply even seams, which, when cured, do not spread, and do not decrease in size;
• Double-sided tape. The material is excellent for bonding metal to metal, as well as to other bases. adhesive tape is selected depending on the area of ​​the connecting parts and the weight of the structure. Bonding metals with such a viscous tape provides a stable adhesion of the two bases, which is practically not afraid of the influence of various external factors;
• cold welding. This option of connecting metal parts is carried out by deforming the welding mass and fully introducing it into the surface of the product. This adhesive can be made up of one or two elements and is excellent for a strong bond. steel materials. Cold welding is an adhesive that retains its characteristics at very high temperatures.

For gluing a metal or other surface, glue silicone rods are sometimes used, which are applied to the material with a special gun when heated.

How to properly connect metal surfaces

How to glue metal parts? By choosing the right glue, steel objects can be glued together with your own hands without professional skills and additional equipment. To glue metal to metal, follow these steps:

See more details from the video:

• thoroughly clean the surface of rust and degrease with a solvent or other agent that removes grease;
• when using a two-component adhesive, you need to mix the hardener with the base;
• evenly apply glue to the areas intended for gluing;
• parts to connect, and strongly press against each other;
• withstand the time specified in the instructions for the final contraction of the adhesive mass;
• hardened seams, if necessary, grind with a file or sandpaper.

It is necessary to apply glue only on a clean and dry surface.

Having picked up a good adhesive mass and figured out how to glue metals, you can qualitatively perform the process of joining steel parts yourself.

Clay. Perhaps not everyone is good and not suitable for everything, but for everyday life, each owner chooses for himself. Today, the choice of adhesives is huge. But which of them are the most reliable and what are they strong in? We will answer this question in our top!

1

This glue was included in the Guinness Book of Records as the strongest glue. Nine drops of this "second" glue connected a pickup truck and a truck mounted in its back a car that were lifted into the air. The total weight of the lifted load was 5 tons! The scope of its application is as wide as possible. You can connect not only surfaces, but also flange connections, threads, bushings, etc.

2

Based on this connection, it is possible to single out one brand, all epoxy adhesives good and very reliable. Under the action of the hardeners (polyamines) contained in this adhesive, so-called "cross-linked polymers" are formed. It is perhaps difficult to find anything more reliable than such a connection. "Epoxy" is resistant to alkalis and even some acids, while it has high adhesion to metals.

3 Glue "Siroflex"

Returning to specific household needs, it is necessary to isolate this particular glue, called "liquid nails". The innovative formula of this glue favorably distinguishes it from the rest. Without dowels and nails, it will allow you to securely fix a variety of items in the house: mirrors, holders, window sills and shelves. Among its own kind, it was Siroflex that collected the maximum of positive reviews.

4 Glue "Montagekit Extreme Grip"

This universal glue is called "super strong" by the manufacturer, and this is not far from the truth. Adhesive fast setting, waterproof, based on acrylic dispersion. Initial adhesion force - 120 kg per square meter, and this is one of the best indicators for adhesives universal application. Its price is not small, but the effect will please the most captious owners.

It is the “super glue” that we get when the repair does not require special skills. The glue of this brand, although for professionals (it is positioned that way), will also allow amateurs to please themselves with a reliable fastening various materials and surfaces. Glues "forever" almost everything: plastic, rubber, metal, porcelain, wood and cork.

6

The so-called "liquid hide glue" is a master woodworker. Even very specific wood in the most complex joints will be securely fastened to long years. Interesting feature- glue is good for heavy, strong connections, but in weak and moderate it is better not to use it.

7 PVA glue

Yes, this is it, good old PVA, or an emulsion of water and polyvinyl acetate with special additives. There are as many varieties of it as there are materials that can be perfectly fastened to them. In fact, the whole secret is in its concentration and special additives, which allows you to glue almost everything. And the high frost resistance of glue is generally beyond praise.

8 Adhesive "PU Max"

Polyurethane adhesive with reinforcing fibres. Fluid and waterproof, dries in an average of 1 hour, allowing almost immediate use of the joints. This glue is interesting in that it is it that is actively used by yachtsmen around the world, because. reliably serves in sea conditions.

9 Hard Plastic Glue

Heavy plastics are polyvinyl chloride or PVC products. Most often it is plastic water pipes. PVC glue is also strong, even stronger than some of its counterparts. Namely, this brand is especially popular with plumbers and pool builders. The adhesive is heat resistant and of course water resistant. For pipe installation or repair, this is the best choice.

10 Glue "Bison for textiles"

This glue is especially interesting for women. Textiles, jute, various fibers, corduroy, jeans and much more - this is his "horse". Patches, piping and upholstery can be easily and securely applied to furniture. This is best glue this specialization, singled out by most housewives and even professional tailors.

We have deliberately singled out adhesives in our list in narrow specializations. We are sure that this will allow you to quickly and correctly decide on the right glue. There are many more brands and brands worthy of attention. The choice is yours!

To create permanent joints, in addition to welding and soldering, adhesive compositions are widely used.

Types of glue for metal products

Any adhesive designed to work with metal, which can be bought on the market, provides a high strength seam. And indeed, most often the destruction occurs not in the adhesive seam itself, but at the borders. That is, the reliability of the seam is determined primarily by the quality of the preparation of the plane of the workpieces to be glued.

Specialists who develop adhesives for metals offer many formulations that are adapted to work with metals. but, there are several types that are most widely used:

1. Adhesives based epoxy resin.
2. Cold welding.
3. Double-sided tape.

Two-component adhesives

These grades have gained wide popularity due to the fact that they can connect parts and elements made of concrete, wood, metal alloys, etc. Its versatility and high adhesion have made it popular for use in everyday life and at work. It is used for repair installation work. In addition, it is used to fill voids, seal joints, etc.

They are used for gluing wet surfaces, moreover, some of them allow the use under water.

Features of two-component adhesive for metal

The two-component material is prepared for use immediately before starting work. Such compositions have a short duration of action. This is largely determined by the components that are included in it, but basically this material retains its working properties for no more than three hours. This time can be significantly saved if heating is used.

Seams made with these materials are highly durable. X is used, for example, when making a connection between a sleeve and a bearing.

Two-component adhesives, after setting, acquire a certain elasticity, which, nevertheless, reliably holds the glued workpieces. This property allows it to be used for working with parquet boards and underlay.

Advantages of a two-component composition for metal

Two-component adhesives have the following advantages:

• high strength parameters;
• water resistance;
• lack of electrical conductivity.

Metal adhesives can be used to make certain products. For this finished material poured into pre-prepared molds.

The polymerization of the adhesive occurs only after mixing its components with each other. They are usually supplied packaged in different packages.

The first component is an epoxy resin, the second component is a hardener. According to the recipe, these are polymers, but their properties appear only after they have been mixed.

It should be noted that this work is irreversible and may take a short time. Therefore, before starting, you need to prepare everything in advance.

Single component adhesives

Materials of this type are supplied to different forms packaging. For industrial use such glue is produced in tubes made of aluminum weighing 0.6 kg. They are easier to recycle after use. In addition, in tubes made of this material, the adhesive retains its properties longer.

Meanwhile, adhesives, in the formulation, which includes one component, have a limited range of use. Thus, most of these materials can only be used for room temperature, its minimum level is +5 °C. When storing it, you must also observe temperature regime, which is defined by the manufacturers. Elevated temperature has a negative effect on the adhesive and its properties.

How to choose a good glue

When choosing an adhesive for working with metal, it is advisable to be guided by some simple criteria:

1. The geometric dimensions of the surfaces to be glued.
2. Physico-mechanical parameters of materials.
3. The adhesive to be used must reduce the difference between elasticity and coefficient of thermal expansion.

In the event that they are glued different materials, then you can use the glue that is able to eliminate this difference. If a hard and elastic material will be combined, then a hard composition must be used for a hard one, and for a soft one, respectively, a soft one.

Advantages of glue for metal in solving production problems

The advent of modern adhesive compositions has led to the fact that compounds of this type have become widely used in the production of, for example, metal structures. In particular, this method of connecting parts becomes great alternative welding or riveting.

Adhesive compositions have a number of advantages over the above methods for creating permanent joints in counteracting deformation loads. The use of adhesives eliminates the problems associated with corrosion that occurs at the weld site.

Structures assembled on adhesive joints have a lower mass, retain their impact resistance, and successfully withstand deformation loads.

The use of glue in the creation of structures makes it possible even at the design stage to lay exactly those materials that will provide the required connection parameters.

In addition, the use of glue has a positive effect on the cost of the product as a whole.

When reducing mechanical methods creating permanent joints in metal structures for adhesive manufacturers, receive significant benefits. In particular, the assembly technology of the finished product is greatly simplified.

How to properly connect metal surfaces

It is not rare that there is a need to glue two metal parts even at home.

Before starting this work, it makes sense to go to the nearest hardware store and ask for the so-called cold welding.

The procedure for gluing by cold welding looks something like this:

• First, you need to prepare the surfaces.
• Secondly, remove traces of corrosion from the parts.
• Thirdly, mix the components of cold welding together. Many manufacturers supply this adhesive as a filled tube, where the outer layer is one component and the inner layer is another.
• Fourthly, they must be mixed until a homogeneous mass is obtained. By the way, when mixing can occur chemical reactions with the release of a small amount of heat.
• Fifthly, the resulting mass must be applied to the prepared surfaces.
• Sixthly, metal parts must be squeezed together or placed under a load.

Depending on the type of cold welding, the curing time may vary.

Improving the quality of gluing

Before gluing metal parts, it is necessary to carry out preparatory work, namely, it is necessary to clean it.

Both metal surfaces, which will be connected, must be cleaned of dirt, grease, oils.

For this you can use detergents. After processing, they must be wiped dry, it does not hurt to blow the plane with dry air.

By the way, there are substances on the market that are called primers. After processing a clean plane with this composition, adhesion improves.

Compositions for a static connection are quite hard on the Shore scale. In addition, these compounds have high strength. The resulting products are monolithic and work well against shear of the layers of the product. This joining method is used in metal structures which do not experience dynamic loads.

Deformation bonding of metals

This type of bonding of metals means the joining of metal products in motion. In addition, these can be objects that are in a state of static rest and undergo thermal deformation, or objects that have different thermal expansion.

Heat-resistant glue for metal

Several technologies are used to fasten blanks: welding, riveted joint or gluing. The latter method is a point action on the workpiece to obtain ultimate strength. The possible thermal impact on the seam is also taken into account. For such work, you must use a heat-resistant adhesive for metal, designed for at least 300 ° C.

Composition and rules of application

Glue for metal, is an adhesive mass containing one or two components in its composition. As a rule, the composition includes the following components:

1. The base is epoxy resin, it is designed to ensure its plasticity and uniformity.
2. The filler is a metal component.
3. Additional substances are sulfur and many other elements.

The strength of the resulting joint directly depends on the composition, the quality of the preparation of the workpieces to be joined. If such a connection is made in laboratory conditions then the resulting seam can show best performance than seams obtained by traditional welding. But practice shows that these strength parameters will be significantly worse and therefore cold welding is used to carry out minor repairs metal and polymer products.

To receive maximum efficiency connections metal blanks you must follow a few simple rules:

• Ensure the utmost cleanliness of the plane of the products to be joined.
• Work should be carried out with a well-mixed mixture, which includes resin and hardener.

To speed up the bonding process, heating up to certain temperature. Information about this should be contained in the instructions for use of the composition.

Benefits of bonding

The use of metal bonding does not require any distinctive, professional skills and special equipment from the staff. After the operation, the seams are exceptionally tight and most often resistant to moisture. This technological operation can be performed anywhere. Unlike traditional welding, glued joints are usually not subjected to additional machining.

In addition, metal bonding does not require large labor costs, and this leads to a reduction in the cost of the assembly.

This technology is used when it is not possible to use other methods of joining metal blanks.

In everyday life, it may be necessary to glue together two metal products. Unfortunately, ordinary glue, designed for instant bonding, will not work for these purposes.

How to glue metal to metal - read our article.

How and how to glue metal to metal: instructions

First of all, you need to decide on the glue. For gluing metal, brands such as "Superglue Moment for Metal" or "Epoxilin" are suitable. For a reliable connection, it is better to purchase from an auto parts store " cold welding". Usually the product consists of two tubes - one with the active substance and the second with the hardener. You will also need a bottle of solvent.

1. Prepare the surfaces of the products - wipe them with a cotton pad or cloth soaked in solvent. Alcohol, cologne, vodka or glass cleaner are also suitable for these purposes.
2. If there is rust on the surface, it will also need to be removed. Treat the part with sandpaper or a metal brush.
3. In addition, you need to prepare several tools. If you need to glue small metal parts, you will need a toothpick. If a wide surface is to be glued, then prepare a thick needle or other sharp tool.
4. If you are gluing wide surfaces, then they should be scratched for a stronger connection.
5. Next, you need to lubricate the surfaces with the selected adhesive. If the parts are small, then the glue should be applied with a toothpick.
6. Apply adhesive to both surfaces to be bonded. Wait a couple of seconds for the adhesive to become viscous, and then connect the surfaces. Hold the surface for a few seconds and then set aside. See the gluing time on the package: usually five to fifteen minutes are enough to completely cure the composition.

Modern chemistry offers its own ways of fastening metal parts. Sophisticated adhesive mixtures firmly and permanently bond metals and, if necessary, metal to other materials.

In many industries, including aircraft and shipbuilding, metal bonding has become commonplace. The adhesive compositions used in this case can connect the parts over the entire surface, at its individual points, and also provide the necessary holding force.

5. The hardened adhesive line can be processed and leveled as a weld or brazed seam with a file.

Components

The two-component adhesive has good holding and filling properties and does not shrink. Withstands compressive load.

Two-component adhesive based on vinyl or epoxy, excellent for joining aluminum parts.

The thin layer of adhesive is suitable for making very small adhesive joints, thick layer serves as a filler.

Adhesives are sold in inlays, tubes and glasses. Unused to the end, the glue loses the desired properties over time. Do not buy glue "in reserve".

glue line

The load on the adhesive joint can be very different. And you must always take into account the nature of the load when choosing an adhesive. For clarity, the figures show distinctive features loads.

Tensile and compressive loads do not cause special requirements. In these cases, you can use high-speed and contact adhesives. Tensile and shear resistance is also not a problem. Serious requirements for glue are imposed by shear and compressive-shear loads. In places where these loads are applied, you must strengthen adhesive joints overlays. It is recommended to use overhead strips and squares, which should capture the entire adhesive line. If this is not possible, then you will have to connect the parts by soldering or welding.

Attention!

PRECAUTIONARY MEASURES

All adhesives for metal are entirely a product of chemistry. Therefore, it is necessary to provide good ventilation and, if necessary, use a gas mask, and not an anti-dust respirator - here it is ineffective. Protect your hands with rubber gloves when handling adhesive.

High-speed adhesives set parts very quickly, but should only be used when the joint is subjected to tensile and compressive loads.

Two-component adhesives that are used for bonding structures require time to cure (24 hours or more).

Single-component adhesives are competitors to high-speed adhesives used in the same area. However, some of them remain flexible and shrink. For this reason, such adhesives are not used when it comes to high loads. You will find precise information on the use of adhesives in the instructions that come with them.