Powder painting of cars. Full painting price Disadvantages of powder paint
Powder paints are radically different from others paints and varnishes - they are not a liquid substance, but fine suspended particles, which are held on the treated surface due to the difference in electrical potentials.
Powder coating is the fastest and cheapest
The technology of powder painting of metal products became widespread in the 50s of the last century, closer to zero this method was refined to the ideal, after which it began to be used for painting cars.
This article presents the painting technology. You will learn what are the advantages of powder painting, what equipment is needed for its implementation and how the coating process takes place.
Powder coating: advantages
Powder paints for metal consist of three types of fine particles:
- grains of polyester resin), which melt when heated and form a continuous film surface on a metal part;
- A binder component that connects polymer particles to each other;
- Colored pigment that gives the powder paint the desired shade.
Powder coating of metal products is widespread in the factory painting of cars, because in comparison with the use of classic paints and varnishes (acrylic, alkyd and melamine alkyd enamels), this technology has significant advantages:
- Powder painting provides a reference quality of the treated surface in terms of visual appeal - a knowledgeable person will accurately identify a powder-painted car among enamelled cars;
- The coating, which has undergone the polymerization process, is distinguished by wear resistance, resistance to mechanical damage and weathering. Powder coating does not change the influence of ultraviolet solar radiation;
- Powder coating technology does not require the use of expensive colorist services to select the shade of the composition (such materials do not mix with each other). On sale are compositions with a matte and glossy effect, metallic and mother-of-pearl paints;
- Powder coating of metal products is an environmentally friendly technology. Unlike enamels, which require dilution with chemically aggressive solvents, which form toxic fumes during application, the material does not have harmful effects on the body of the painter;
- Due to the absence of solvents and their explosive vapors, the application of a polymer coating is not associated with an increased risk of fire hazard;
- Metal powder painting is performed much faster than applying enamel compositions, since this material does not require separate layers of paint that are forced to dry out - the powder is sprayed in one layer and polymerized in 20-30 minutes (the full set of coating strength occurs within 24 hours).
"Dry" paint application is more popular among car owners Among the disadvantages of this technology, we highlight the fact that the powder coating of metal products is unrealizable in garage conditions, since the powder hardens at elevated temperatures (150-200 degrees), which can be achieved only in a special polymerization chamber.
The downside is the impossibility of mixing compositions that differ in color with each other (as a result, you will not get a uniform color) - you will have to choose the shade of the material among the paints on the market.
Powder coating principle
Powder coating of metal is carried out using the electrostatic method. The essence of this technology consists in spraying a negatively charged powder onto the grounded surface of the car - due to the potential difference, fine polymer particles are held on the metal body.
Powder coating equipment that imparts electrostatic properties to the material used consists of four mechanisms:
- Feeder - a sealed unit for storing the powder used in the work;
- Compressor - pumps compressed air into the feeder under pressure;
- Ejector - a pump feeding powder to the atomizer;
- A spray gun is a gun by means of which the material is applied to the painted surface.
Electrostatic painting is as follows - a working amount of powder is poured into the feeder and the compressor begins to pump compressed air into a sealed tank, which brings the material to a "boiling" (suspended) state. Then the ejector transports the mixture into a spray bottle equipped with a corona electrode - a source high voltage, when passing through the zone of which the particles acquire a negative electric charge.
Powder coating can also be carried out using the tribostatic spraying method, in which suspended particles receive an electric charge not under the influence of a voltage source, but due to friction with a fluoroplastic coating inside the sprayer. This method is economical financially, however, it differs in 2 times less productivity.
You can also paint your car at home Metal powder painting is carried out in a special one, consisting of two separate rooms:
- Powder coating booth, where the composition is applied to the surface of the car. This unit is equipped with a recuperative ventilation system - air containing particles of powder that has got into it during coloring is sucked in by an exhaust compressor and passed through a pulse filter. During the filtration process, polymer particles are removed and fed back to the feeder for subsequent use, which ensures zero waste of materials during operation;
- Polymerization chamber is a room in which the applied coating cures at a constantly maintained temperature of 150-200 degrees. Based on they are classified into convective and thermo-radiation: in convective, the temperature rise occurs due to the movement of air masses heated by a heat generator (running on gas or diesel fuel), in thermo-radiation chambers, point heating of the painted surface is carried out by infrared heating elements.
The powder paint polymerization chamber provides heating of the powder to a temperature at which it melts and forms a viscous coating that penetrates into microcracks on the surface of the car. Upon further heating, the material hardens and obtains maximum adhesion to the metal body.
Powder coating: technology
Powder painting of vehicle elements (body parts are previously dismantled, since heating the entire vehicle in the polymerization chamber to a temperature of 200 degrees is unacceptable) is performed in the following sequence:
- Stage number 1 - preparation of the body or part
Initially, existing deformations and irregularities are eliminated on the body using the straightening method, then the treated places are putty with polymer or fiberglass putty. The composition is diluted according to the manufacturer's instructions and applied to the surface of the body with a soft rubber spatula... After the putty has hardened (to speed up the process, the applied composition is heated with an infrared heating element or a building hair dryer), it is matted with fine-grained sandpaper.
The old paint-and-lacquer coating of the part is sanded with P600 sandpaper to obtain a rough surface. Grouting is carried out "wet" - with moistening, which helps to reduce the amount of dust emitted. The filled areas are protected from moisture penetration by pasting with oilcloth.
- Stage number 2 - priming
The sanded parts are degreased with a solvent and covered with 2-3 coats of primer. Powder paint for metal requires the use of special primers containing iron phosphates in the composition, due to which the adhesion of the coating to the metal surface increases.
This process is called "phosphating" - the primer is applied with a standard spray gun at a supply pressure of 2-2.5 MPa from a distance of 20-25 cm from the body surface. The pause recommended by the manufacturer for the drying of the composition is maintained between the application of layers.
After the final drying of the primer, its surface is matted with fine-grained emery paper (P400 - P600), rinsed and dried at room temperature.
- Stage 3 - powder coating
The powder application technology is selected based on the shape of the part to be painted - for painting surfaces with a complex configuration (discs, shock absorbers, body kits), it is rational to use the tribostatic method, which allows for more accurate spraying, when processing flat elements (hood, wings) - electrostatic feed.
When implementing the electrostatic method, a voltage of 30-100 kV is applied from the generator to the corona electrode of the spray gun.
The compressed air used to supply the powder should have a moisture content of 1.3 g / m3 and a dew point of up to 7 degrees, since suspended polymer particles have hygroscopic properties - they absorb the vapor contained in the air, which leads to poor adhesion of the material to the metal surface. For the preparation of compressed air, special drying installations of the OSV-30 type are used, where air is driven through a layer of filtering sorbent.
Painting is performed by applying 3-4 thin layers of powder in overlapping stripes. The layers are applied sequentially, without intermediate pauses. A thickened coating is sprayed on the rounded ends and corner parts of the parts.
- Stage 4 - polymerization
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After painting, the part is moved to the polymerization chamber, where it is kept at a temperature of 160-200 degrees for 15-25 minutes. In the process of melting the powder, it is required to maintain a constant temperature, drops above 5 degrees are not allowed.
After heating to the melting temperature, the polymer particles become viscous and, displacing the air contained in the coating, form a monolithic film, which solidifies upon further heating. After the specified time has elapsed, the part is cooled (without a sharp temperature drop). The full set of strength of the powder coating occurs 24 hours after polymerization.
Having bought a brand new car, its owner expects that its shining appearance will remain for a long time ... In practice, unfortunately, everything turns out to be not so rosy. Constantly exposed to a number of influences during operation, body elements lose their appearance and need to be restored. In this case, powder painting of bumper and door moldings, mufflers, calipers and other important components that also determine the aesthetic characteristics of the car comes to the rescue.
It has a number of advantages and allows not only to improve the appearance of the vehicle, but also to create a polymer coating that will last for a long time. Thanks to her, the service life of the painted element will be significantly extended, and its outer will be at its best!
What is powder painting of auto parts? Why is it needed?
Powder coating is special technology applying powder paints to various elements of the car body, which allows you to obtain a polymer coating. The latter is characterized by excellent aesthetic and strength characteristics and allows to extend the service life of the treated elements. This is very important when it comes to the car body. During the ride, its parts are exposed to shock, small stones hit them, which leads to the appearance of chips and scratches. Frequent contact with moisture is the cause of the development of corrosion processes in the metal, therefore, over time, expensive restoration (or even replacement) of the element may be required.
Also worth mentioning are the chemicals used to remove snow and ice from roads in winter period time. They also do their bit by having a devastating effect on metal. Powder painting of a car muffler, its nozzle, calipers and other elements helps to solve all these problems. Thanks to her, they:
- get effective protection from exposure to moisture, therefore, corrosion processes do not develop on them;
- high level of protection against mechanical and shock loads;
- a decent level of protection against the destructive effects of chemicals.
Thus, by spending money on powder painting, you will save much more on repair and replacement.
Where to order powder painting of car parts?
Do you need to paint the muffler nozzle in Moscow? Do you want to order powder painting of calipers? Contact the TermoColor company! We specialize in this area and have everything necessary to carry out work at a professional level. Painting is carried out by experienced specialists who strictly observe all technological processes and carry out quality control in accordance with state standards.
Modern equipment and consumables, the quality of which has been tested by time and repeated use, allow us to guarantee a high-strength coating that will provide the necessary protection to the processed product.
Painting is carried out in one or more of 213 colors according to the classic “RAL” scale. Our experts will individually select a painting scheme, so that the color of the element will be exactly what the customer wants to see it, and the car will become one of a kind, unlike others. We carry out both painting of new elements and restoration of those that have already been in operation. After it, they will look like new again and will receive new life... Would you like to order painting of car parts? You won't find a better artist like “TermoColor”!
Powder painted motorcycle wheel
Negative environmental influences and poor quality road surface adversely affects the condition of car wheel disks. To preserve and maximize their performance, as well as maintain their attractiveness appearance you can recommend the method of painting them using powder paints. It is worth noting the high popularity and demand for the technology of powder coating of discs - more than 50% of discs are painted in this way.
Powder coating of discs is a polymer coating, with excellent protection properties, excellent adhesion and wear resistance at the highest level. In comparison with other types of coatings, it wins in each of the main parameters. For powder coating of discs, special equipment is used. with the help of which the coating is applied to the surface of the disc in the form of a polymer powder, without the use of of various kinds hardeners and solvents.
Below, in a brief form, you can get acquainted with the procedure for painting discs with the powder method, which takes place in several stages:
1. Thorough cleaning of the surface from residues old paint using a sandblasting method or chemical remover.
2. If necessary, etching and applying a phosphating coating to improve the adhesion of the paint to the metal.
3. Application of zinc-containing powder primer, followed by holding in a heat chamber.
4. Application of powder paint.
5. Application of powder varnish.
To obtain a high-quality and durable coating, strict adherence to technology is required at all stages of staining. Special meaning has a final powder coating process. In fact, this is the same powder paint whose task is to give the coating a special strength and appropriate appearance. In contrast to the generally accepted concepts, powder varnishes are not only shiny, but also matte, with a "moire" texture, with "sparkles", etc.
The richness of the palette presented here allows you to choose any color for your disc.
In our company you will be offered a full range of restoration works car drives, with full compliance with each technological stage. We choose only the highest quality consumable and paints from leading European manufacturers. Our qualified staff will carry out all the work as quickly as possible and with high quality.Along with applying powder coating, we are ready to weld small defects on your discs in argon.
Come and your disc will look like a brand new one!
Prices for powder coating of discs and brake drums
| Product type | The cost of sandblasting (rub.) | The cost of applying paint and varnish (rub.) | Total (RUB) |
|---|---|---|---|
| Disc 13 "" | 700 | 850 | 1550 |
| Disc 14 "" | 750 | 1000 | 1750 |
| Disk 15 "" | 850 | 1150 | 2000 |
| Disk 16 "" | 900 | 1300 | 2200 |
| Disc 17 "" | 1000 | 1400 | 2400 |
| Disc 18 "" | 1100 | 1500 | 2600 |
| Disc 19 "" | 1200 | 1700 | 2900 |
| Disc 20 "" | 1300 | 1900 | 3200 |
| Disc 21 "" | 1400 | 2100 | 3500 |
| Disc 22 "" | 1500 | 2300 | 3800 |
| Brake drum | 800 | 900 | 1700 |
Powder coating of cars - this is the latest technology application of polymer coatings and paints and varnishes to the surface of cars, including the body, wheels and wings. Powder coating is a special method of applying polymer coatings, thanks to which not only excellent decorative qualities are achieved, but also increased protective properties. This technology is environmentally friendly, waste-free and allows obtaining high quality polymer coatings.
Painting is carried out using high-polymer powders that are applied to the surface of car parts intended for painting. The whole process is carried out in powder spraying chambers. In these chambers, an electrostatic field is formed, under the influence of which particles of polymer powder paint are deposited on the surface of the product.
After that, the parts of the car are heated in special ovens for polymerization. The melting point of the polymer is 160-200 ° C. The part is kept in the oven for some time and then cools down. This forms a thin and durable polymer layer on the surface. This painting technology can be used for glass or metal products, since these materials can withstand the specified temperature.
To date, about 15% of all painted products have been subjected to powder coating. And this figure is constantly increasing. This technology is widely used not only in the automotive industry. Today powder coating cars -far from the only area where this staining method is used. The powder painting method today is used to paint products of various types and purposes - office and garden furniture, roofing materials and metal tiles, instrument panels, furniture fittings, shelves, refrigerators, sports equipment and much more.
Powder paint is a special powder, finely ground polymer. Its particles are about 10-100 microns in size.
As a method of painting, powder painting has many advantages. The main advantage is that this technology does not need to perform additional operations, such as dilution, dissolving, tinting, adjusting the viscosity or coating with an additional layer. Powder coating is carried out with one thinnest layer of polymer coating.
Thus, powder coating is a cost-effective technology that can save not only on materials, but also on time and manpower. Additional cost-effectiveness is provided by the recuperation system used in the spray booths. Those polymer particles that do not fall on the surface to be painted are again returned to the painting cycle. Thus, when powder painting cars and other products, it is possible to reduce the loss of dye to 1-2%. To be convinced of the profitability of powder painting, compare this figure with the traditional method of painting, where losses can reach 50-60%. The advantage of powder coating is obvious.
How is powder coating of cars carried out?
Powder coating of cars Is a technology that uses special equipment - polymerization ovens and spraying chambers. Also, the equipment complex includes a system for transporting products that are painted. Transport is required in order to easily move the product between painting stages. This is especially important for car parts that are large in weight and size.
Before starting powder painting, the surfaces of car parts should be prepared. It is necessary to degrease it, clean it from rust and oxides, and then cover it with a layer of phosphate or chromate, which will ensure better adhesion of the powder polymer to the surface. When carrying out preparation in painting, special equipment is also needed, which is included in the complete line for powder painting of cars.
To date, powder painting of parts in the production and assembly of cars has taken a strong leading position in comparison with other painting methods, as well as polymer coatings. This technology can be used to coat the body, fenders, wheels, reflectors, bumpers, plastic parts inside the cabin and many other structural elements.
