Fire protection principle and composition of fire retardant coating for steel structure



The steel structure has the characteristics of high strength and lightweight, improved power and speed, is widely used in the construction industry, has excellent ductility and seismic resistance, construction time is short, and is increasingly used in building construction. However, the high-temperature resistance of the steel structure is not very good. In the case of fire, it takes only a quarter of an hour for the temperature of the steel structure will rise to more than 540 degrees.

The high-temperature steel structure is easy to deform, thus causing trouble. Ultra-thin or thin steel structure fire retardant coating fire insulation principle is fire retardant coating layer in the fire swell foaming, forming foam, foam layer not only isolated oxygen, and because of its loose texture and excellent heat insulation function, can delay the speed of heat transfer to be protected substrate.

According to the physical and chemical principle of analysis, the process of foam layer coating swelling and foaming occurs because of the expansion of the volume of the endothermic reaction, but also consumes the heat of combustion, which is conducive to reducing the temperature of the system, the effect of these several aspects, so that the fire retardant coating has obvious fire insulation effect. Coating on steel members of thick steel structure fire retardant coating fireproof heat insulation principle of fire retardant coating is affected by the fire when the coating is basically not attack affecting volume change, but the coating has a very low thermal conductivity, delay the speed of heat to be confirmed base on material, coating itself is non-combustible, fire retardant coating for steel members barrier and avoid thermal radiation effect, avoids the flame and high temperature direct attacks on steel members etc.Coating on steel members of thick steel structure fire retardant coating fireproof heat insulation principle of fire retardant coating is affected by the fire when the coating is basically not attack volume change, but the coating is very low thermal conductivity, delay the speed of heat to be confirmed base material, coating itself is non-combustible, fire retardant coating for steel members barrier and avoid thermal radiation effect, avoids the flame and high temperature direct attacks on steel members.

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