Device for processing hidden cavities of a car body

EQUIPMENT FOR APPLYING ANTI-COAST AND SOUND INSULATION

This page presents professional and semi-professional equipment for applying anticorrosive coating to the underbody and wheel arches, as well as special devices for processing hidden car cavities for uniform application. This equipment can also be used to apply liquid sound insulation.

You can buy equipment wholesale and retail in our office.

Subject to large wholesale purchases of Mercasol / Noxudol anti-corrosion materials, we provide equipment for free use.

Professional equipment

Airless Spray Equipment

Used for applying anti-corrosion compounds on wax, oil-wax and bitumen-wax bases on the underbody of the car. The equipment can also be used to process hidden car cavities.

The Assalub 1:26 pump is a high-pressure pump used for airless treatment of various parts of the car, usually the underbody. The pump is connected to the compressor and has an air pressure regulator. The gun is connected to the pump through a high-pressure hose, through which the material for processing is supplied.

It should be noted that the pump can be used to work with various containers, ranging from 20-liter buckets to 208-liter drums.

Air Spray Equipment

Used for applying anti-corrosion compounds on wax and oil-wax bases into hidden cavities of the car.

Assalub 1:3 pump is a low-pressure pump, used for air treatment of hidden car cavities. The pump is connected to the compressor and has an air pressure regulator. The gun is connected to the pump by two low-pressure hoses, one of which supplies the material, and the second carries air. Mixing in the gun, the material forms an air-droplet mixture, which is used to treat the car.

It should be noted that the pump can be used to work with various containers, ranging from 20-liter buckets to 208-liter drums.

Gun SATA LM-2000 – used in professional equipment for applying material by air. The gun has two inputs, one of which is supplied with material, and the second with air. In the gun, air and material are mixed, and the output is an air-droplet mixture for application into the hidden cavities of the car.

The gun should be used with a variety of cavity spray attachments, as well as car cavity spray attachments.

Anti-corrosion gun

Wear and tear of any vehicle begins literally from the first moment of its operation. Corrosion is considered one of the most significant factors in car wear and tear - the number one enemy for all unprotected metal surfaces. The causes of corrosion are the ingress of moisture particles and chemically active substances onto unprotected areas of the car, as well as into the area of ​​hidden cavities, which are also susceptible to destruction due to the occurrence of pockets of rust.

It is generally accepted that those parts of the car that are closest to the road surface are most susceptible to corrosion: the bottom, sills, and the bottom of the inside of the body. In this regard, those areas of the body where the paintwork is damaged also become dangerous.

The process of anti-corrosion treatment of the body with a special gun

To avoid the occurrence of rust spots, various protection methods are used, including various types of anti-corrosion treatment. A very effective remedy today is anti-corrosion treatment agents, which are called anticorrosion agents . These products are recommended to be applied to all unprotected metal areas of the car, and also to be used to treat hidden cavities where there is a possibility of oxidative processes that destroy the structure of the metal.

Special equipment is used to apply anti-corrosion compounds and treat hidden cavities. This is a special spray gun for anticorrosion, which comes with a set of additional accessories for ease of application of the substance.

Equipment for anti-corrosion treatment - operating principle

The operating principle of anticorrosive treatment equipment is similar to the operation of a spray gun. The sprayer for applying the product is connected by a hose to a compressor. A compressor uses compressed air to create excess air pressure or, conversely, a rarefied atmosphere . Due to this, the substance comes out of the nozzle in a beam and hits the treated areas.

Gun for treating body and suspension surfaces with anti-corrosion compounds

A special attachment is placed on the nozzle. Depending on the type, it is responsible either for the shape and size of the torch, or for the flow of anticorrosive agent through special channels into hidden cavities. The nozzle can have different shapes, lengths, angles and diameters . Therefore, the sprayer is usually equipped with a whole set of additional elements for treating hidden and hard-to-reach areas and various cavities in the car.

The sprayer of modern models is connected to a hose, usually through a fitting located on the handle.

Guns are usually equipped with several adjustment systems responsible for the following characteristics:

• supply of anti-corrosion agent;
• air supply;
• shape and size of the anticorrosive beam.

During the work, the master presses the trigger of the gun, thereby opening the supply of anticorrosive agent for treating the car. All modern equipment is usually manufactured in such a way that the paint tank is located at the bottom .

Anti-corrosion treatment of the body with a special gun

Types of pistols

Due to the fact that modern industry offers car enthusiasts a very wide selection of anticorrosion agents, each of which has its own characteristics, the equipment for applying them may have different characteristics. The products have different viscosities, can be designed to treat open areas or hidden cavities, and have different application conditions .

There are three main types of anticorrosive guns:

• for wax products;
• for anti-gravel;
• universal equipment.

It is logical that the latter type is most popular among those who fight corrosion at home.

Methods of car anti-corrosion treatment

Experts distinguish two main methods of anti-corrosion treatment of cars:

The first method is chosen, as a rule, for hidden cavities in cars. A sprayer with a pneumatic pump is used here. It has two channels - one for anticorrosion, the other for air. These 2 streams are supplied under pressure, mixed upon exit and create a beam in the form of a mist of small particles . This method is ideal for internal cavities; products with good fluidity are used for its implementation. A mist of fine particles applies well to all areas inside the cavities of the machine - and the thickness of the spray can be adjusted. All the most inaccessible areas are treated very effectively in this way.

Additional holes can be drilled to process cavities. Nozzles are inserted into these holes, through which the material is supplied. Nozzles can be flexible or metal. Metal ones are used if it is problematic to introduce the product through a flexible one. As mentioned above, substances with high fluidity are used here to increase efficiency. The entire space inside the cavity is filled with a thick cloud. After it settles on the entire surface, something like a protective film is formed inside, which prevents the formation of rust spots.

Technology of anti-corrosion treatment of wheel arches

The second method is chosen for spraying material onto external areas - thick varieties of anticorrosive are well suited for this. It is supplied under pressure to the nozzle - the thickness of the spray depends on the pressure. The equipment here consists of the following elements:

• compressor;
• High pressure pump;
• spray;
• hose.

The pump makes the material supply pressure even higher. Its design includes a body and a tube from which the substance is supplied into a reinforced channel to enter the sprayer. This method is chosen for the body, bottom and sills of the car . Experts recommend choosing high-viscosity anti-corrosion agents for these areas - in this case they are more effective than liquid ones.

Conclusion

Any car owner is interested in his car serving him as long as possible. To do this, you need not only to take a careful approach to its operation, but also to ensure timely maintenance and protection from those external factors that negatively affect its durability.

Corrosion is a factor that can quickly turn a new car into a pile of rusty junk. Therefore, there is no doubt about the need to protect all components of your machine from corrosion.

One of the effective ways to combat rust is the use of anti-corrosion compounds. To apply them, a special tool is used - experience shows that a simple brush will clearly not be enough. A competent choice of equipment for spraying anti-corrosion materials is one of the decisive factors that will ensure the long service life of your car.

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Reliable and inexpensive methods of corrosion protection - ZR expertise

Modern factory anticorrosion protection quite effectively protects the body from corrosion. But nothing lasts forever. To keep the iron in good condition, the protection needs to be updated. In addition, proper treatment will help slow down the corrosion process that has already begun for a long time.

Underground workers

In addition to the visible wear of the paintwork on the lower part of the body from constant sandblasting and road reagents, corrosion of the internal cavities is inevitable. Weld seams and rolled joints of door panels and trunk lids are also at particular risk. The problem with such areas is inadequate priming and painting, even in factory conditions.

The corrosion process is noticeably accelerated in hidden cavities. Due to poor ventilation, moisture and dirt accumulate there, mixed with road reagents, forming an electrolyte - a corrosion catalyst. And if its external manifestations are visible on the welded points of the bottom, on welds and in places where panels overlap, then everything is much worse inside.

Before applying protective coatings, the underbody and hidden cavities of an older car are washed and dried. This procedure itself significantly delays the onset of serious corrosion, since it rids the surface of aggressive electrolyte.

To protect the body, two main methods of anti-corrosion treatment are used.

Canadian approach

Canada has a humid, cold climate that favors the appearance and development of corrosion. Therefore, it is Canada that is considered the legislator of the so-called ML method of body protection, although it was invented in Scandinavia.

The method involves pouring ML oils (analogues of the usual Movil and the popular Rast Stop product) into hidden cavities of the entire body through existing factory technological holes and drains. Penetrating compounds well impregnate welds and cover the internal surfaces with a film that reliably insulates from contact with air. The outside of the bottom is covered with the same materials.

The ML method is not demanding on the quality of body preparation and forgives a lot of mistakes when applying the composition. In Canada, for example, they don’t wash the bottom thoroughly, but only knock off large pieces of dirt. The ML oils used have excellent penetrating ability and saturate surfaces and seams well even in such conditions.

They can be applied over any rust - the composition includes inhibitors (chemical reaction retarders) of corrosion. But to achieve maximum effect, it is better to thoroughly rinse the bottom and its hidden cavities.

The disadvantage of ML oils is low mechanical strength. In hidden cavities they last for years, and on open surfaces they wear off quite quickly.

Chemical manufacturers also develop processing schemes for machines of specific models. They indicate factory technological holes and additional ones that are proposed to be drilled in order to fully fill all hidden cavities. In fact, servicemen rarely make holes in the body, if only because the owners are often against it. In most cases, additional holes are not so necessary for full processing. By the way, these diagrams are useful for studying the structure of a particular body, especially when a rare model arrives for processing.

SWEDISH REPLY

The abbreviation ML denotes anti-corrosion compounds for hidden cavities of the car body, as well as the treatment method. Behind these letters are two authors: the Swedish automobile association Motormannen and the ideologist of the direction, Sven Laurin. At the end of the 50s of the last century, one of the specialized companies offered car owners a new service - complete body processing using the ML method. Although this technology was first tested 20 years earlier.

The Swedish ancestry is explained by the difficult local climate, which accelerates the processes of iron corrosion. On a global scale, power engineers faced this problem when the country began to actively build high-voltage masts. Their tubular structures were rotting from the inside at an alarming rate. It was then that Laurin proposed his own method - pour anti-corrosion oils into hidden cavities through existing or drilled holes.

Movil, the Soviet analogue of Swedish ML oils, received a consonant name by accident. This composition was developed much later by scientists in Moscow and Vilnius, the Russian and Lithuanian capitals, and gave the product a name. In those days, it was fashionable to invent funny abbreviations and abbreviations.

old light

The second approach is European, more serious. In addition to treating hidden cavities with ML oils, hard (bitumen) protective compounds are applied to open underbody panels and wheel arches. This method is more demanding on the quality of preparatory work. It is important to thoroughly wash the open bottom panels, otherwise the bitumen compounds will quickly peel off.

The main advantage of bitumen coatings is their high mechanical strength. Various types of them, for example, compositions for liquid fender liners or for underbody panels, can protect the metal from external influences for a long time.

Bituminous coatings can be applied to rust, but with reservations. If the corrosion is superficial, just in case, the affected area is impregnated with ML oil and after that a solid composition is applied. With deeper layer-by-layer rust, impregnation with ML composition may not help. Moreover, the development of corrosion cannot be controlled, because bitumen coatings, unlike ML oils, are opaque. Therefore, in each specific case, the master assesses the degree of rust damage and the possibility of applying a bitumen coating over it.

When treating the bottom with a bitumen composition, the same restrictions apply as with ML oils. If bitumen gets into the outlet, like ML oils, it can be removed with solvents, but you will have to spend much more time and effort.

DANGEROUS SAVINGS

There are a huge number of companies on the market offering their anti-corrosion compounds. All products have comparable quality, but preference should be given to well-known players, for example: Tectyl, Noxudol, Dinitrol, Waxoyl.

Branded chemicals are not the cheapest, but they have been tested many times. This is what specialized services work with, having seen the results of using products from dubious manufacturers. Low-quality products do not protect, but kill the body. For example, left ML oils, instead of deeply impregnating surfaces and seams, creating a protective layer, act in the opposite way. They have very low fluidity, clog drains, and also form a thick membrane film, under which corrosion only accelerates. And cheap bitumen compounds have an extremely short service life. Drying quickly and cracking, they to some extent protect the body from mechanical stress, but not from corrosion.

Election campaign

When using a car year-round in a large city, where roads are actively watered with reagents in winter, the first external signs of internal corrosion appear after about five years or 100,000 km. The most economical way to significantly extend the life of the body is to wash the underbody and its hidden cavities every 50,000–70,000 km. In Moscow, this service costs 2000–3000 rubles.

Ideally, it is worth supplementing the first wash of the bottom with treatment of its hidden cavities. Moreover, at the next visit, for example after 50,000 km, it is no longer necessary to rinse the internal cavities and refill them with ML oil - it “lives” there for a very long time. Such complex processing will save a decent amount. For example, for 8,000–9,000 rubles they will thoroughly wash the bottom, treat hidden cavities and apply ML oils to open panels.

This option is suitable for normal urban use. On open surfaces under such conditions, ML oils can withstand 20,000–30,000 km. And if the bottom is covered with plastic shields, the composition will last much longer. A combined approach is also possible. Unprotected and particularly susceptible to sand blasting areas are covered with a bitumen composition. An owner who wants his car to have a long life can “douse” it with ML oils every year over the old coatings.

Treatment with bituminous materials makes sense when operating in difficult conditions and very large annual mileages. This option is suitable for off-road driving enthusiasts and owners of commercial vehicles, as well as participants in amateur racing. It is suitable for both used and new cars. The bitumen coating on the bottom, if not actively killed, lasts for five to seven years. That is, it is quite enough for the average period of car ownership. After the bitumen coating has worn out, it is partially cleaned off and a fresh layer is applied. A package of services, including washing, treating hidden cavities with ML oils and applying a bitumen coating to the bottom, is estimated at about 15,000 rubles.

The costs of protecting the body are comparable to the costs of car maintenance - complex treatment with ML oils and treatment with bitumen compounds cost the same as the first and second maintenance, respectively. Usually it is enough to spend money on anti-corrosion treatment only once or twice - this investment is recouped when you sell the car.

ONE BLOOD

Bituminous materials for protecting underbody panels and fender liners have a single base, but differ from each other, let’s say, in their additive packages. They are added to increase the mechanical strength of the coating in the zone of active external influence - for example, on wheel arches. To do this, the base base includes a reinforcing filler - crumb rubber. Accordingly, such a composition will be more expensive. This coating can be applied to other parts of the body. Let's say, on thresholds subject to strong sandblasting from wheels.

Manufacturers supply compositions for liquid fender liners in different containers and different consistencies, but with the same characteristics. Thanks to this, services can use the most convenient equipment to work with them. Thick compositions are applied with a brush in several layers, and liquid ones - with a sprayer or euro-gun. More viscous material can be diluted with a solvent to use any available equipment.

We would like to thank Antikor.rf for their help in preparing the material.

Features of treating internal cavities of car doors against corrosion

When purchasing a new car in the budget segment, or choosing a model on the secondary market, drivers are always faced with the problem of how to treat the inside of the car doors against corrosion. Poorly processed hidden body cavities are always a danger of the frame rotting from an unexpected direction. The most vulnerable elements remain the sills, lower parts of the doors, and wheel arches.

Causes of corrosion damage

Drivers should understand that externally treating doors with anti-corrosion agents will be useless if rust destroys the metal from the inside. The cavity, which is located under the casing, serves as a pocket for the side glass, laid cables, sensor units, etc. must be protected from corrosion as thoroughly as the visible part of the door. Causes of corrosion:

• poor anti-corrosion treatment of metal;
• electrochemical process;
• systematic contact with water;
• anti-ice reagents.

If the metal is rotten by more than 40%, there are large holes through it, then it is cheaper to replace the door.

Anti-corrosion treatment involves not just coating the doors with bitumen mastic or liquid paraffin, but also inspecting the metal first. If there are already traces of rust on the door, then the use of a preservative that stops the spread of corrosion will not be sufficient. It is necessary to clean the damaged area, prime it, and protect it with anticorrosive.

Electrochemical corrosion occurs at welding sites because the integrity of the metal is damaged at the points of contact between the aluminum patches and the steel.

If the drainage holes in the threshold are clogged, then there is always moisture inside the door, which contributes to the oxidation of the metal and rapid rotting. At the same time as the door, the thresholds begin to collapse, water gets into the cracks between the lining seals, penetrates into the inner frame, and destroys the body from the inside.

In winter, city streets are sprinkled with a salt composition so that the ice does not freeze in blocks and makes it easier to remove. Salts and aggressive chemicals, getting on the paintwork of the body and remaining in the cracks, destroy parts much faster than water. This is facilitated by the presence of scratches, chips, dents with damage to the paintwork.

Types of door corrosion

Corrosion can only be conditionally divided into several types according to the degree of damage that rust has already caused to the metal. Depending on this, various types of repairs and subsequent anti-corrosion protection will be used. Drivers face the following problems:

1. Blistering of the paintwork on the outer surface. Even though the paintwork is not damaged, this does not mean that there is no rust under the paint layer. In 60% of cases, drivers discover a significant area of ​​corrosion, a hole through it, after cleaning the surface.
2. Visible streaks of rust on the bottom of the door. The defect occurs at the site of a chip or microcrack in the paintwork. In this case, rot penetrates both into the inner pocket and onto the threshold.
3. Significant areas of corrosion along the lower edge of the door. Such a defect does not appear in one day, but if the car spent the winter outside under a simple awning and was not used, then in 3 months of winter corrosion can cover the entire part and affect the elements of the bottom.

Local repairs without the use of welding are carried out if rust appears in a microcrack in the paintwork or at the site of a chip, but does not destroy the metal. In other cases, a metal patch or door replacement will be required.

Preventing car door corrosion

Before treating car fender liners for corrosion, cleaning doors, or changing thresholds, it is necessary to conduct a metal diagnosis. Tap the parts with a hammer and check for minimal traces of rust. Preventative measures against corrosion can be divided into the following types:

1. Passive protection. The body element is cleaned of dirt, dried, and treated with bitumen mastic. A paraffin-based anticorrosive agent is used for the outer surface; an oil composition must be poured into the closed cavity.
2. Active transformative prevention. For protection, not just anticorrosives are used, but compositions that displace moisture like Moville with preservatives for primary rust spots. Body elements are treated with liquid compounds, and after drying, a protective film is formed. The main condition for using Movil is the absence of synthetic seals in the doors; the aggressive composition destroys rubber bands and plastic linings.
3. Comprehensive prevention involves the use of both anticorrosion agents and the treatment of metal with a primer after preliminary cleaning of the body element.
4. Galvanization. An expensive production method for protecting a car body from corrosion. Many brands hot-dip galvanize at the assembly stage, so doors, sills, and the underbody of the car are rust-resistant. Volvo shows the best results. Brand cars do not rot after 15 years of operation. At home, you can use a primer with a high zinc content.
5. Constructive protection. A modern way to prevent corrosion is to install a system on the car that controls the flow of electrons on the metal surface. These cathodic, anodic, and electronic protection devices are used on premium segment models.
6. Lamination, installation of overlays. Protecting the door from rust with a film is aimed primarily at preventing chips on the paintwork from flying gravel. Automotive anti-corrosion film is applied independently, the service life of the film is up to 1.5 years.

Whatever segment the car belongs to, rust prevention by any method helps to avoid expensive repairs and saves time. The use of overlays and lamination help emphasize the style.

How often should a car be treated for rust?

The effectiveness of anti-corrosion protection depends 90% on proper surface preparation. Even new cars are recommended to be protected from rust immediately after purchase. This advice can be ignored if the car is purchased for 2-3 years. All car factories, including those in China, carry out anti-corrosion treatment of body parts with industrial plastic polymer. The coating will last for 2 years to protect the metal from rust.

If the car is more than 5 years old, then it is necessary to treat the bottom and wheel arches once a year, and once every two years to carry out a full range of internal treatment, which includes protecting hidden cavities and coating the exhaust system with thermovarnish.

Types and features of anticorrosive

In order to process the hidden cavities of the car body with your own hands quickly, it is necessary to use an anti-corrosive agent for internal surfaces, which, when hardened, forms an oily or paraffin film. The following requirements apply to anticorrosive agents that protect doors and hidden cavities:

1. The composition must remain fluid in order to saturate its microcracks well.
2. Do not destroy the paintwork.
3. Possess rust preservative properties.

Anticorrosives for external surfaces must have the following properties:

1. Maintain strength at high and low temperatures.
2. Have high anti-shock properties and an optimal degree of adhesion.
3. Be resistant to the aggressive effects of anti-ice reagents.

Products for external treatment are made on the basis of bitumen mastics and synthetic resins. The compositions are packaged in cans and have a high viscosity. Bitumen mastics are applied to the body in a thick layer and may contain zinc.

Choosing anticorrosive for doors

Liquid anticorrosives are suitable for treating the internal cavity of the door; let’s look at the main brands.

Dinitrol ML. The material has high adhesion, forms an oil film, and does not drain. Anticorrosive reliably preserves pockets of rust, preserves the surface from the penetration of water and oxidizing agents for up to 1.5 years.

LIQUI MOLY Hohlraum-Versiegelung. A universal bitumen-wax composition suitable for treating external and internal cavities. Applied with a gun, the coating has noise-insulating properties and can withstand significant mechanical stress.

Tectyl ML. It has good viscosity, penetrates into microcracks, and does not pill. Thanks to corrosion inhibitors, it prevents the penetration of moisture and preserves primary rust.

VELV Movil. Oil anticorrosive after application retains a fuel oil-like state, effectively preserves primary rust, and pushes water out of micropores. It is recommended to apply only to the treated surface, adjusting the amount as it may run off.

For external door treatment, solid anti-corrosion mastics are used, which are applied with a brush or gun under high pressure.

Dinitrol 479. A high-pressure gun is used to spray the viscous composition. The product is applied in a thick layer up to 2 mm. Anticorrosion uses synthetic rubber combined with corrosion inhibitors. The foam composition forms a durable coating on the metal surface that is resistant to mechanical damage and moisture penetration.

Tectyl Bodysafe. The anticorrosive agent is applied with a gun, has a medium viscosity, and the equipment does not require special attachments or adjustments. It has high inhibitory properties, easily tolerates temperature changes, and does not crack.

Body. Mastic for treating external parts of the body is used to treat the bottom, thresholds (for painting), and doors. The dense structure provides good mechanical protection of the surface and has a service life of up to 3 years. Selected for cars up to 2010.

LIQUI MOLY Wachs-Corrosions-Schutz. It has a medium degree of viscosity, penetrates well into microcracks, and provides complete protection of the metal from water and salt reagents.

DIY anti-corrosion

Do-it-yourself anti-corrosion treatment of a car body can be done using a product you make yourself. The basis is taken from industrial synthetic materials, which, in addition to high protection characteristics, provide sound insulation of the interior.

Homemade material is used to treat the bottom, wheel arches, and sills, so drivers do not have the question of how to treat the bottom of car doors. Mastic is suitable for internal and external work.

Preparing a car for anticorrosion

Preparatory work is of paramount importance before body treatment. The quality of cleaning, drying, and grinding of the metal determines how tightly the anticorrosive agent will adhere to the surface. Body preparation is carried out in steps:

1. Wash and dry the surface.
2. Clean off the rust if there are pockets of corrosion. Remove the paint and treat the metal with a grinder if the damage is significant.
3. If there are through holes, carry out repairs.
4. Clean with sandpaper and degrease.
5. Prime and putty if necessary.

The last stage of door processing is the application of a protective coating and painting.

Manufacturing and application

To make anticorrosive agent yourself, you will need the following material:

1. Body-950. Used to increase sound insulation ─ 400 ml.
2. Cordon mastic will increase the anti-vibration characteristics of the body ─ 2 l.
3. Oil anticorrosive Movil NN - 2.7 l.
4. Plasticine ─ 2 packs.
5. Fluffed lard ─ 1 jar.
6. Solvent or White Spirit degreaser.

To make it, you need to mix cannon fat, plasticine and Cordon in a metal bowl and heat it in a water bath. Wait until the mixture turns black, stirring constantly. Remove from the bath, apply with a brush to the treated surface, do not use a gun. Processing car doors takes place in steps:

1. Treat the surface with a degreaser.
2. After white spirit has dried, apply Body-950 in two layers. Apply each new one after the previous one has completely dried.
3. Apply a homemade anti-corrosion product.
4. After drying, paint.
5. Treat the internal cavities of the door.

The inside of the cavity is treated with oil or paraffin anticorrosive. The part is removed from the body, and the trim is completely dismantled. You can use Movil TECTIL ML in cylinders. Treat hidden cavities through technological holes.

1. A special spray tube is placed on the bottle.
2. The pipe is inserted into the hole and sprayed.

The home remedy is used to protect the inside of the bottom, box, threshold without disassembling the elements. Before treating under the wings of the car, it is necessary to completely clean the part from dirt. You can use paraffin or universal compounds.

Anticorrosive: effectiveness or ineffectiveness

Anticorrosive treatment will save body metal from destruction in most cases:

• if the manufacturer did not galvanize the body parts using a production method;
• if the paintwork is damaged;
• during operation in winter when the car is parked outside the garage.

The effectiveness of protection depends not only on the quality of the composition, but also on pre-treatment of the surface. If you do not clean and prepare the metal, then corrosion processes will continue under the anticorrosive layer, which will quickly lead to the body rotting unnoticed.