Mesh as a kind of metal structures
The metal grid is a special construction and building material that is used in many spheres of human economic activity. For example, as reinforcing armature, various types of fences, in finishing works or in the production of aviarys and cages.
Mesh manufacturing process
The mesh is manufactured on special machines by the method of “twisting” the spirals from metal wire one to the other. Machines for weaving grids have a semi-automatic control. The material for production is a wire made of low-carbon steel, which can be without special coating, galvanized or coated with PVC.
According to the shape of the cells, the metal mesh can be of two types:
- rhombic with an acute angle of 60 degrees;
The size of the cells can also vary – from 10 to 100 mm. From this depends the height of the net in rolls, which are usually 1.5 m with a length of a folded mesh of 10 meters. This does not exclude the production of a grid of other parameters, while its height can be from 1 to 4 m, and the length can reach 18 m in a roll.
Methods of protection against corrosion
Since a metal mesh is often used for external fences, the issue of its protection from the aggressive influence of the environment becomes of paramount importance. This is done with the help of various wire coatings:
- paint application;
- polymer coating.
Most meshes are made from galvanized steel wire. The application of zinc is carried out mainly by the method of “hot” galvanizing, which increases the service life of the grid to 20-25 years. The electrolytic method of galvanizing does not justify itself because of the insufficient application of zinc, which leads to rusting of the mesh after only 1-2 seasons.
But even galvanizing will not save the grid from corrosion, if its operation is carried out on the coast of the salt sea. In this case, the ideal option will be a polymer coating, which in high-quality performance does not burn out in the sun and can withstand frosts up to 40 degrees below zero.