Powder painting of a car. Full painting price Disadvantages of powder paint
Powder coatings are fundamentally different from others paintwork materials- they are not a liquid substance, but fine suspended particles held on the treated surface due to the difference in electrical potentials.
Powder coating is the fastest and cheapest
The technology of powder coating of metal products became widespread in the 50s of the last century, closer to zero, this method was finalized to the ideal, after which it began to be used for painting cars.
This article presents the painting technology. You will learn about the benefits of powder painting, what equipment is needed for its implementation and how the coating process works.
Powder Coating Benefits
Powder paints for metal consist of fine particles of three types:
- grains of polyester resin), which, when heated, melt and form a continuous film surface on a metal part;
- A binder component that connects polymer particles to each other;
- A colored pigment that gives powder paint the desired shade.
Powder coating of metal products is widely used 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 coating provides a reference quality of the treated surface in terms of visual appeal - a knowledgeable person will accurately identify a powder-coated car among enameled cars;
- The coating, which has passed the polymerization process, is wear-resistant, resistant to mechanical damage and atmospheric influences. Powder coating is not affected by ultraviolet solar radiation;
- Powder coating technology does not require the use of expensive services of colorists 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 that require dilution with chemically aggressive solvents that 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 fumes, the application of a polymer coating is not associated with an increased risk of fire hazard;
- Painting metal with powder is much faster than applying enamel compositions, since this material does not require forced simple drying of individual layers of paint - the powder is sprayed in one layer and polymerized in 20-30 minutes (full set of coating strength occurs within 24 hours).
"Dry" method of applying paint is more popular among car owners Among the disadvantages of this technology, we highlight the fact that powder coating of metal products is unrealizable in garage conditions, since the powder hardens at elevated temperatures (150-200 degrees), which can only be achieved in a special polymerization chamber.
The downside is the impossibility of mixing compositions that differ in color from 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.
The principle of powder coating
Powder coating of metal is carried out by electrostatic method. The essence of this technology is to spray a negatively charged powder on the grounded surface of the car - due to the potential difference, fine polymer particles are held on the metal body.
Powder coating equipment, which gives the material used electrostatic properties, consists of four mechanisms:
- Feeder - a sealed unit for storing the powder used in the work;
- Compressor - pumps compressed air under pressure into the feeder;
- Ejector - a pump that feeds the powder into the spray gun;
- A spray gun is a gun by means of which the material is applied to the surface to be painted.
Electrostatic painting is as follows - a working amount of powder is poured into the feeder and the compressor starts to pump compressed air into the sealed tank, which brings the material to a "boiling" (suspended) state. Then the ejector transports the mixture into a spray gun equipped with a corona electrode - a source high voltage, passing through 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 electrical charge not under the influence of a voltage source, but due to friction with a fluoroplastic coating inside the spray gun. This method is economical in financial terms, but differs in 2 times less productivity.
You can paint your car at home Metal powder painting is carried out in a special one, consisting of two separate rooms:
- Powder coating chamber, 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 entered it during painting is sucked in by an exhaust compressor and passed through an impulse 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;
- The polymerization chamber is a room in which the applied coating is cured at a constantly maintained temperature of 150-200 degrees. Proceeding from, they are classified into convective and thermoradiation: in convective, the temperature rises due to the movement of air masses heated by a heat generator (running on gas or diesel fuel), in thermoradiation chambers, the painted surface is spot-heated by infrared heating elements.
The powder paint polymerization chamber ensures that the powder is heated to a temperature at which it melts and forms a viscous coating that penetrates into microcracks on the car surface. With further heating, the material hardens and gets maximum adhesion to the metal body.
Powder coating: technology
Powder coating of car elements (body parts are preliminarily dismantled, since heating of 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 parts
Initially, existing deformations and irregularities are eliminated on the body by straightening, then the treated areas are puttied 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 paintwork of the part is sanded with P600 sandpaper to obtain a rough surface. Grouting is carried out "wet" - with moisture, which helps to reduce the amount of dust emitted. The puttied areas are protected from moisture by pasting with oilcloth.
- Stage number 2 - priming
Sanded parts are degreased with a solvent and covered with 2-3 layers of primer. Powder paint for metal requires the use of special primers containing iron phosphates, which increase the adhesion of the coating to the metal surface.
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 surface of the body. Between the application of layers, the pause recommended by the manufacturer for drying the composition is maintained.
After the final drying of the primer, its surface is matted with fine-grained sandpaper (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 being 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, fenders) - 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 must have a humidity within 1.3 g/m3 and a dew point of up to 7 degrees, since the suspended polymer particles have hygroscopic properties - they absorb the vapor contained in the air, which leads to a deterioration in the adhesion of the material to the metal surface. For the preparation of compressed air, special installations for drying of the OSV-30 type are used, where the air is driven through a layer of filtering sorbent.
Coloring is carried out by applying 3-4 thin layers of powder in overlapping stripes. Layers are applied sequentially, without intermediate pauses. A thicker coating is sprayed onto the rounded ends and corners of the parts.
- Stage number 4 - polymerization
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After dyeing, 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 of more than 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 hardens upon further heating. After the set time has elapsed, the part cools down (without a sudden temperature drop). Full curing of the powder coating occurs 24 hours after polymerization.
Having bought a brand new car, its owner expects that its shining appearance will last for a long time... In practice, unfortunately, everything turns out to be not so rosy. Constantly subjected to a number of influences during operation, body elements lose their appearance and need to be restored. In this case, powder coating of bumper and door moldings, mufflers, calipers and other important components, which 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 it, the service life of the painted element will be significantly extended, and its external appearance will be at its best!
What is powder coating of auto parts? Why is she needed?
Powder coating is special technology applying powder paints to various elements of the car body, which allows you to get a polymer coating. The latter is characterized by excellent aesthetic and strength characteristics and allows you to extend the service life of the processed elements. This is very true when it comes to the car body. During the ride, its parts are subjected to impact, small pebbles hit them, which leads to chips and scratches. Frequent contact with moisture is the cause of the development of metal corrosion processes, therefore, over time, expensive restoration (or even replacement) of the element may be required.
Worth mentioning are the chemical reagents that are used to remove snow and ice on roads in winter period time. They also do their bit, having a devastating effect on the metal. Powder coating of the car muffler, its nozzles, calipers and other elements helps to solve all these problems. Thanks to her, they:
- receive 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, having spent on powder painting, you will save much more on repairs and replacements.
Where to order powder coating of car parts?
Do you need to paint the muffler nozzle in Moscow? Interested in powder coating your calipers? Contact the company "TermoColor"! 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 the production of a high-strength coating that will provide the necessary protection to the workpiece.
Painting is carried out in one or more of the 213 colors according to the classic “RAL” scale. Our specialists will individually select a painting scheme, thanks to which 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 receive new life. Do you want to order car parts painting? You won't find a better performer like "TermoColor"!
Motorcycle rim powder coated
Negative environmental impact and poor quality pavement adversely affects the condition of the disks of automobile wheels. To preserve and extend their performance as much as possible, as well as to maintain their attractiveness appearance you can recommend the method of painting them with 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. When powder coating discs, special equipment is used. with which the coating is applied to the surface of the disk in the form of a polymer powder, without the use of different kind hardeners and solvents.
Below, in a brief form, you can get acquainted with the procedure for powder coating the discs itself, which takes place in several stages:
1. Thorough cleaning of the surface from residues old paint by sandblasting or chemical cleaning.
2. If necessary, pickling 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 the technology at all stages of staining is necessary. Special meaning has a final powder coating process. In fact, this is the same powder paint, the task of which is to give the coating special strength and an appropriate appearance. In contrast to the generally accepted ideas, powder varnishes are not only shiny, but also matte, with the texture of "moiré", with "sparkles", etc.
The richness of our palette allows you to choose any color for your disc.
Our company will offer you a full range of restoration works car rims, with full observance of each technological stage. We choose only the highest quality consumable and paints from leading manufacturers in Europe. Our qualified staff will perform all work as quickly as possible and with high quality. Along with powder coating, we are ready to weld small defects on your disks in an argon environment.
Come and your disc will look like brand new!
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 |
| Disc 15"" | 850 | 1150 | 2000 |
| Disc 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 latest technology applying polymer coatings and paints and varnishes to the surface of cars, including the body, wheels and fenders. Powder coating is a special method of applying polymer coatings, thanks to which not only excellent decorative qualities are achieved, but also enhanced protective properties are imparted. This technology is environmentally friendly, waste-free and allows to obtain high quality polymer coatings.
Painting is carried out using high-polymer powders, which are applied to the surface of car parts intended for painting. The whole process is carried out in powder coating chambers. In these chambers, an electrostatic field is formed, under the influence of which particles of polymer powder paint settle on the surface of the product.
After that, parts of the car are heated in special polymerization ovens. The melting point of the polymer is 160-200 °C. For some time, the part is kept in the oven, and then cools down. In this case, a thin and durable polymer layer is formed on the surface. This painting technology can be used for glass or metal products, as these materials can withstand the specified temperature.
To date, about 15% of all painted products have been powder coated. 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 coating method today paints the products of the most different types and purposes - office and garden furniture, roofing materials and metal tiles, instrument panels, furniture fittings, racks, refrigerators, sports equipment and much more.
Powder paint is a special powder, finely ground polymer. Its particles have a size of about 10-100 microns.
As a painting method, powder coating has many advantages. The main advantage is that this technology does not need to perform additional operations, such as dilution, dissolution, tinting, viscosity adjustment or coating with an additional layer. Powder coating is performed with one very thin layer of polymer coating.
Thus, powder coating is a cost-effective technology that saves not only on materials, but also on time and human resources. Additional efficiency is provided by the recuperation system, which is used in the spraying chambers. Those polymer particles that do not fall on the painted surface again fall into the painting cycle. Thus, when powder coating cars and other products, it is possible to reduce dye losses to 1-2%. To see how profitable powder coating is, compare it with the traditional method of painting, where losses can reach 50-60%. The advantage of powder coating is obvious.
How is car powder coating done?
Powder coating of cars- This is a technology in which special equipment is used - polymerization ovens and spraying chambers. Also, the complex of equipment includes a system for transporting products that are painted. Transportation is required in order to easily carry out the movement of the product between the stages of painting. This is especially important for large parts of the car in terms of weight and size.
Before you start 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 cars.
To date, powder coating of parts in the production and assembly of automobiles has taken a strong leading position compared to other painting methods, as well as polymer coatings. With this technology it is possible to apply a coating on the body, fenders, wheels, reflectors, bumpers, plastic parts inside the cabin and many other structural elements.
