Types of anti -corrosion primer and its principle of action

One of the biggest challenges for anyone working with metals is corrosion. Metals corrode and become structurally weak over time due to exposure to oxygen, moisture, and other environmental factors. Anti-corrosion primers are used to counteract this. These primers are an essential first line of defense against corrosion’s damaging effects on metal surfaces.

The way anti-corrosion primers function is by erecting a shield between the metal and its surroundings. By keeping oxygen and moisture from penetrating the metal surface, this barrier dramatically lowers the likelihood of rust and other types of corrosion. Anti-corrosion primers come in a variety of forms, each intended for use in a particular setting and application.

Zinc-rich primers, which have a high proportion of zinc dust, are one popular kind. Zinc serves as a sacrificial metal in this primer, corroding in place of the underlying metal to provide exceptional protection. Another well-liked option is epoxy primer, which is well-known for its strong adhesion and chemical resistance, making it perfect for harsh environments. Alkyd primers provide a cost-effective solution that strikes a balance between performance and cost for less demanding applications.

Choosing the best primer for your project is made easier when you comprehend the underlying ideas of these primers. Galvanic action, in which the zinc corrodes instead of the metal surface, is how zinc-rich primers provide protection. Epoxy primers produce a strong, impermeable layer that keeps oxygen and moisture out. Alkyd primers are frequently used in less aggressive environments because they offer a good protective coating.

Selecting the appropriate anti-corrosion primer is essential for prolonging the lifespan of metallic structures and guaranteeing their dependability and security. You can safeguard your investments and uphold the integrity of your projects by making well-informed decisions based on your understanding of each type’s operation and optimal applications.

Types of primer

On the principle of operation and composition

Anti-corrosion primer is classified into the following categories based on the principles of technological impact:

• Ending. Used only for metal surfaces. Such a primer contains a mixture of special acids in the composition of a mixture, which, when applied, corrode a surface layer of metal for better adhesion of subsequent primer.

• Strengthening. Such a primer according to iron contains elements of metals that have a negative chemical potential compared to iron. First of all, corrosion affects this primer, while iron remains whole.

• Anti -corrosion. Such a primer directly protects iron from corrosion. The people are called anticorus such a procedure.

• For plastic surfaces. When the plastic is primed, roughness and scratches are aligned due to the plastic properties of the primer itself. The paint reluctantly clings to the primed plastic surface. This is especially true for auto repair, since a large number of parts are made of plastic.

• A primer for aluminum. Aluminum is very poorly adopted with paint. Therefore, an intermediate stage is important in the form of a priming process, which allows you to apply paint without problems, and thus give aluminum details the desired color.

• Based on acrylic. Such soil is universal, resistant to the temperature difference and moisture exposure, durable.

A universal alkyd primer is also available. offered in barrels and banks of tin. The purpose of this primer is to improve the interpenetration of enamel while painting. After painting, the pre-primed surface is reliably protected from the elements. The fact that metal and lumber can be primed both indoors and outdoors lends versatility to this type of primer. produced in three hues: brown, black, and gray.

Alkyd primer won’t prevent corrosion unless the surface it is applied to is cleaned, degreased, and polished to remove any dirt or oil stains.

Alkyd primer application can be done manually with a brush, roller, or pulleizer, or it can be done mechanically.

After rust and irregularities are removed, the surface is primed. The soil aligns the surface, fills in surface roughness and microcracks, and ensures consistent paint adhesion. We can state that there won’t be any interaction between the processed product’s surface and a paint layer in the absence of a primer. The primer is made up of filler, coloring, film-forming agents, and drying-speed-enhancing agents.

On metal

The following types of metal primer are distinguished:

• A mixture for isolation. It forms a film on the metal, which helps to protect against the penetration of water, oxygen in an active form and substances involved in the oxidation process. For priming this type, acrylic mixtures are used with the addition of zinc oxide, iron snuff and talc. A bright representative of soils with insulating properties is the alkyd primer GF-021 and epoxy EP-0010.

• A primer that makes the metal surface passive to oxidation. Such a primer will protect the material from oxidation is better than others. It forms a dense oxide film, reaction on the surface of the metal, after which the metal is not able to oxidize and collapse. Such primers include GF-0119 and FL-03K.

• Primers that contribute to the saturation of the surface layer of phosphorus oxide. Due to the presence in the composition of orthophosphoric acid, the soil penetrates deeply into the processing surface, increasing the clutch area several times, allowing to increase the strength and protection of the processed structures. Such primers are used for ferrous and non -ferrous metals and even for galvanized iron. In this category, you can record the primer VL-023 and VL-02.

• Primer with protective properties. The composition of such a primer is 90% of the powder of metals of zinc and lead or magnesium alloy powder with zinc, the remaining 10% are binders. When primed, corrosion products interact with the primer and form protection in the form of a shell. In case of violation of the integrity of such a protective layer, zinc oxides protrude and prevent the oxidation of the metal. Such protective features are used widely in the shipbuilding: they process the underwater part of ships, coastal structures made of metal. Treading primers are presented in the EP-0284 and EP-057 market.

• Primer for converting rust. When coating with a primer, for converting from rust, the substances react and form a dense layer. The surface of the metal product can not be cleaned of iron oxide – this is convenient. Representatives of such a primer are KV-0278 and EP-0199.

A primer in the cylinder

Many associate soil painting with a bank and brush or a can and pulverizer, but what happens if you combine them? A primer is included in the spray cans. Therefore, the industrial method made priming different surfaces before painting easy and practical.

A primer like this shouldn’t be blended, mixed with a stick, or applied to the surface with a brush. All you have to do is shake it five times to get everything ready, including the primer and press. In terms of time spent on this primer, anti-corrosion primer in spray cans facilitates more efficient work.

Neither the compressor nor the brushes can equally distribute the primer from the spray on the surface at the same time; everything happens swiftly, effectively, and efficiently. Because of the primer layer, you can level microacrapins on any surface, indoor or outdoor. Such a primer dries quite quickly. The anti-corrosion coating life of any surface is extended when primer and paint are used together. Such a primer saves a great deal of time and settles into a flat layer in even the most difficult-to-reach areas because of the aerosol principle of spraying.

A can of spray primer is seen in the video.

Any surface must be prepared before primer is applied. This involves cleaning the surface of various pollutants and grinding it with sandpaper.

Additionally, the surface must be cleaned with solvents that contain alcohol or gas.

After shaking the cylinder with a primer five to seven times, the primer process takes place.

By forming a barrier that keeps oxygen and moisture from penetrating the metal, anti-corrosion primers are crucial for preventing rust and other surface deterioration on metal. There are several varieties of these primers, such as polyurethane, epoxy, and zinc-rich varieties, and each has special advantages for varying conditions and degrees of protection. Selecting the appropriate primer to increase the longevity and robustness of your metal projects can be made easier by being aware of the unique uses and workings of each one.

Preparation of metal for priming

First, we carefully prepare the metal surface before applying the primer. We clean the surface of iron oxide by using sandpaper and a metal brush to remove rust. If there is still old paint on the surface, we use an industrial hair dryer to burn it all the way to the base before using the same brush or sandpaper to clean it.

We start by eliminating old paint and rust before moving on to eliminating oil stains. We use technical alcohol or paint solvents for this. The final product should have a surface free of paint, rust, and oil stains.

A primer with anti -corrosion properties can be applied with a brush of which is selected depending on the treated surface. If this is a flat wide surface, then the brush should be 7-10 cm flat or you can go to a foam rubber with a roller. With a volume of more than 2 m.sq. It is advisable to apply a spray gun. And if the surface is not flat, in the form of tubes and corners, then it is necessary to use a brush 2-4 cm wide. In general, no matter how much the main tool is the main thing carefully without passes to apply the protective layer, since the quality of the work does not depend on the choice of the tool.

Reading the primer’s instructions won’t be unnecessary. Subject to the guidelines, the manufacturer ensured that the coating met the necessary standards through testing and provided a guarantee for its quality. To prevent a tragedy during the primer process, all safety and labor protection regulations must be strictly followed.

Type of Anti-Corrosion Primer	Principle of Action
Zinc-Rich Primer	Provides sacrificial protection by corroding instead of the metal surface.
Epoxy Primer	Forms a tough, protective layer that resists moisture and chemicals.
Polyurethane Primer	Creates a durable barrier that resists abrasion and environmental damage.
Alkyd Primer	Slow-drying primer that provides good adhesion and protection against rust.

An essential tool for preventing rust and deterioration on metal surfaces is an anti-corrosion primer. These primers serve as a barrier, keeping the metal from being harmed by oxygen and moisture, which are the main causes of corrosion. Metal structures can be kept strong and functional for a longer period of time by using an anti-corrosion primer.

Anti-corrosion primers come in a variety of forms, each intended for use in a particular setting. Epoxy primers work well in harsh environments because of their exceptional adhesion and chemical resistance. Conversely, zinc-rich primers offer sacrificial protection by allowing the zinc to corrode rather than the underlying metal. Polyurethane primers are flexible and resistant to impacts, making them ideal for surfaces that may be subjected to stress or movement.

Choosing the best primer for your needs is made easier when you comprehend the underlying ideas of these primers. Their capacity to adhere firmly to the metal surface and form an impermeable layer that obstructs corrosive substances is crucial. Additionally, some primers have inhibitors built in to counteract rust-causing substances, adding an additional degree of protection. For the primer to adhere well and work effectively, the surface must be properly prepared.

In conclusion, selecting the appropriate anti-corrosion primer and correctly applying it can ultimately result in significant time and cost savings. These primers improve the toughness and aesthetics of metal surfaces in addition to providing protection. Using the appropriate primer is a wise investment in maintaining and preserving metal assets, whether you’re working with industrial machinery, automobiles, or infrastructure.

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