Galvanized iron is widespread today. It is used in construction and industry, and paint is applied to its surface even in the conditions of the plant for protection, which allows you to decorate the material.
It is used for the manufacture of dishes, stamped parts, containers, etc. The scope and possibilities of using a galvanized sheet are wide, this is due to features and characteristics. Galvanized sheet retains its properties when exposed to physical factors and mechanical stress.
Appointment
Galvanized iron acts as a convenient material in the construction of fences, ceilings and is used as flooring. Its characteristics during roofing are highly appreciated. The most convenient this material is for roof devices that have a slight slope. The sheet can be pre-painted and used in the arrangement of roofs with a large slope. Application of paints and varnishes is carried out not only before covering the roof, but also before the construction of fences, as well as during the construction of prefabricated modular structures.
What else you need to know
The scope of construction is not the only one where galvanized iron is used. It acts as an excellent material in the manufacture of household appliances. Electric cookers, refrigerators and washing machines, as well as much more, are made using a galvanized sheet. The material found its distribution in the field of instrumentation.
Characteristics of galvanized sheet according to GOST 14918-80
When the aforementioned state standards are used in production, cold-rolled carbon steel coils act as raw materials, the surface quality of which is regulated by GOST 16523-89. In this case, the width can vary from 710 to 1800 mm, and as for the thickness, this parameter should be in the range from 0.5 to 2.5 mm.
After reading the markings, you can understand that steel is divided into three classes. If among the alphanumeric designation you notice the letter "P", this indicates that the coating thickness may be a limit of 40 to 60 microns. If the marking contains the number “1”, the coating thickness should vary from 18 to 40. As for the number “2”, this parameter varies from 10 to 18 microns.
If you notice the designation "XH", then in front of you is steel for cold stamping. Galvanized steel is divided into sheets:
- normal;
- deep;
- very deep drawing.
To achieve the necessary mechanical properties, the sheet is first annealed by the cold-rolled method, and then a zinc coating is applied to its surface. At the final stage, the sheet is passed through a molten zinc bath. This process is accompanied by the deposition of zinc on a metal strip. As a result, corrosion resistance is achieved.
Galvanized iron is made using zinc of grades Ts0 and Ts1. Among other things, aluminum, lead and other materials are added to the bath. At the request of the customer, conservation is carried out, which allows to achieve a higher level of surface protection.
Additional areas of use
The scope of galvanized metal is much wider than you might imagine. This material is used during cladding of buildings, during the installation of ceilings, and is also indispensable in the field of agricultural construction. The sheet is used for storage facilities, silos and silos. Galvanized iron, the corrosion of which is not terrible with proper processing and operation, has found its application in civil engineering. Gutter and gutter systems are made from the web.
Additional technical characteristics of cold-rolled galvanized sheet in accordance with GOST 14918-80
Such material may be coated with moisture resistant powder paints during the manufacturing process. In places of bending of the canvas, the thickness of which does not exceed 1 mm, should not be covered with delaminations that will expose the metal. Bending should be carried out at an angle of 180 °. In the places of bending, the appearance of small cracks along the entire length is permissible, but the dimensions of the spherical hole should not go beyond the tolerance fields.
The relative elongation may be greater than those established by one unit. Galvanized iron, the sheet of which will be subjected to tearing, must exhibit temporary resistance. This indicator ranges from 300-490 MPa. In this case, the elongation will be equal to 21%.
Galvanized Iron Cost
The price of galvanized iron will vary depending on the size of the sheet. If you have a canvas with dimensions of 1000 x 2000 mm, then you will have to pay 266 rubles for the sheet, while its thickness will be 0.4 mm. If the sheet size increases to 1250 x 2500 mm, then the price will be 388 rubles.
Paint selection
If you have a question about how to paint galvanized iron, then you should choose one of the options presented by the market. On sale you can find "Cycrol", which is an acrylic matte composition, which contains active anticorrosion additives and organic solvents among the ingredients.
It is possible to use this mixture outside the premises, applying as protection for roofs, sheet profiles, corrugated board, drainpipes, roofing sheet and gutters. The paint is characterized by high hiding power and light resistance, has excellent characteristics in weather resistance and water resistance. The material is convenient to use, has excellent adhesion to the surface, and is also one of the best options for repairing galvanized surfaces. The main advantage is the absence of the need for preliminary priming. Application should be in one coat.
If you still do not know how to paint galvanized iron, then you can pay attention to the waterproof Serebrol paint, which is a one-component anti-corrosion enamel for galvanized and ferrous metal. A mixture is made on the basis of aluminum powder, perchlorovinyl resins, as well as corrosion-resistant additives and a mixture of organic solvents.
Thixotropic enamel has high weather resistance, wear resistance and oil and petrol resistance. After applying such protection, galvanized steel will gain an increased barrier effect.
Using these paints you can protect the material from the effects of atmospheric precipitation, the sun and salty air. The paint does not fade, and after application it dries quickly and extends the life of the structures.