Corrosion protection of steel structures (1987)

Metal exhibits of the historical museum.

The movement of cars on the streets of the city.

Bridge over the river.

The control panel of the nuclear power plant.

Structures at oil fields in the sea.

The hull of the ship.

Metal connections of bridge parts.

Pipes for wells.

Pipes damaged by corrosion.

Alternating frames with various parts damaged by corrosion.

Car assembly line.

Car bodies destroyed by corrosion.

Magnetic disks and other media in the VC.

Hands count money.

Ore, the natural state of a metal in which it is combined with non-metals of the earth's crust and atmosphere, most often in the form of oxides.

Open-pit mining of ore.

Metallurgical production, where a person breaks chemical bonds in ore and separates metal from impurities.

However, immediately after that, the metal enters the oxidizing medium again.

Scale on the rolling mill.

This is the beginning of oxidation.

This spontaneous return of metal to chemical compounds is corrosion.

Shots with corrosive phenomena.

International standard of the concept of corrosion.

Alternating frames with industrial landscapes.

Cars are driving through thawed snow.

A cartoon explaining the change in the state of metal in contact with water.

Shots with iron oxide on metal objects.

The spread of rust.

Corrosion in building structures.

The reinforcement loses its bearing capacity, the metal becomes loose, accidents are possible.

As a sample of a metal device operating in an aggressive environment - a car muffler.

The main means of combating metal corrosion are various coatings.

The roof of the landing stage of the Kiev railway station in Moscow.

Work on the protection of metal structures of the landing stage.

Manual method of applying a protective coating.

Cleaning surfaces before applying paint.

The cleaned surface is dedusted, freed from the remnants of organic impurities.

High-quality performance of these operations will ensure a strong connection of the soil and paint with the surface.

Spraying of soil and paint is provided by the use of a pneumatic tool.

When applying coatings, it is necessary to observe safety regulations.

Atmospheric drying of parts.

With mass, in-line production of metal structures, metal rolling cleaning lines are equipped.

Shot blasting machine for cleaning steel sheet.

The sheet enters a special steel chamber.

Cleaning takes place with the help of steel or lead shot of a certain fraction.

The fraction gives the surface a specific texture, which contributes to the connection with the paint material.

Automatic line for painting serial large-sized building structures.

From the cleaning site, the structures are delivered to the receiving position of the automatic line.

Then into the flushing chamber for degreasing.

Spray system.

The alkaline solution reliably washes complex structures.

Washing in clean water.

Drying.

The structure is supplied to the primer.

In the chamber, in a high-voltage field, a rotating disk sprays the soil emulsion.

Along the lines of force of the magnetic field, its droplets are applied to the surface of the structure and tightly connected to the metal.

Drying.

The primer dries completely.

After cooling, the structures arrive at the painting post.

The paint is applied in the same way as the primer, by spraying in an electrostatic field.

Drying.

Cooling.

A new painting cycle and the design is ready to be sent to the consumer.

In aggressive environments, paint coatings are unsuitable.

To protect against corrosion in these cases, a protective zinc coating is used.

Such a coating requires multi-stage preparation.

First, the structures are degreased in a special solution.

Then they are etched in sulfuric acid, where in a few minutes the surface of the workpieces is cleaned from rust.

In the next bath, the structures are washed in hot water.

They are coated with a flux additive for better adhesion to the future coating.

Washed again, but in cold water.

Diffusion connection of steel and zinc.

This coating is called tread.

To work in particularly aggressive environments, aluminum protection of steel structures is used.

The process of aluminizing begins with cleaning the metal in a shot blasting machine.

A large worker on the line.

The structure enters an electric furnace, into a bath with molten aluminum.

Passing through it, the surface of the part is evenly covered with an aluminum film.

The technology of hot aluminizing is much simpler than the technology of galvanizing.

Vertical bath with liquid aluminum.

A collage of metal products where corrosion protection is needed.

A test site for various corrosion protection samples.

Copyright certificates for new methods of corrosion protection.

Corrosion of embedded parts in the production of wall panels.

Protection of such parts with powder aluminum.

Protection of metal products with powder paints.

Application of protective coatings made of metal and ceramics using plasma.

Scientists are considering a new coating tool.

Car body painting line.

Electrical substation.

Pipes for drilling wells.

Vehicles on the streets of the city.

Power lines.