Many believe that metal can not ignite. Steel and iron can not burn, it's true, but the bearing metal as a result of prolonged exposure to a temperature of 500 C soon lose their strength, and possible collapse of buildings and loss of life. To prevent a possible tragedy holds fire protection of metal in order to ensure the safety of iron or steel in terms of combustion from 30 minutes to 2 hours, which with more than enough to lift people out of a burning building and extinguish the fire. Fire protection of metal represents a drawing of him with a special compound which, when used correctly appearance actually does not differ from paints. The function of these compositions – to ensure insulation bearing structures, or simply withdraw from them warm. For insulation of metal is best suited thick-retardants incombustible composition (plaster, plastering, etc.), in addition apply sheet materials, prefabricated elements, masonry. These actions will help to increase the fire resistance of iron structures at 120-180 min.
The deposition of thin thermally refractory mixes – also the type of fire protection of metal (which swells when heated). From the usual paint compositions of this type are not easy to distinguish. This substance during combustion is expanded to forty times, due to release in the goreniyanetoksichnyh process gases forming loose coke-and foam structure. Thermal conductivity of the charred layer of foam, which consists mainly of carbon, low. Fire protection of metal – not a simple process. At first steel covered with corrosion protection agents, in choosing which attention should be paid to the degree of adhesion (adhesion to the metal), because the compositions of this type are not very fire resistant, so fire-resistant layer can simply crumble in the ignition without saving metalwork. The best choice of corrosion-resistant materials will be specifically designed for "fire-retardant paint. Flame retardant applied to the layers (to 10). At the same time to avoid cracking of the refractory coating layers must be thin.