Coating on the steel structure of ultra-thin or thin steel structure fire insulation principle is fire retardant coating layer in the fire expansion foam, the formation of foam, foam layer not only isolated oxygen, and because of its loose texture and good heat insulation performance, can delay heat transfer to the speed of the protected substrate; According to the analysis of physical and chemical principles, the process of coating expansion foam layer because of volume expansion and heat absorption reaction, but also consume the heat when burning, is conducive to reduce the temperature of the system, these aspects of the role, so that fire coatings produce significant fire insulation effect.

Fire and heat insulation principle of thick steel structure fireproof coating:

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 volume changes, 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 prevent thermal radiation effect, avoids the flame and high temperature direct invasion of steel members. And there are some components in case of fire coatings in the mutual reaction and generating non-flammable gas process is endothermic reaction, also consumes a lot of heat, is beneficial to lower the temperature in the system, so the fire effect is remarkable, Steel to play an efficient fireproof heat insulation protection. In addition this kind of steel structure under fire fire retardant coating coating does not occur when volume change form glaze layer, it can isolate the effect of oxygen, oxygen cannot be protected in combustible substrate contact, so as to avoid or reduce the combustion reaction. But this kind of coating is generated by the glaze shape layer thermal conductivity is often larger, heat insulation effect is poor. In order to obtain certain fireproof heat insulation effect, thick type coating fireproof paint coating commonly thicker can achieve certain fireproof heat insulation performance.

There are two kinds of steel structure fire coatings, solvent - based fire coatings and water - based fire coatings. From the perspective of adhesion, the solvent is larger than water, therefore, for outdoor steel structure should use solvent-based fire coatings, indoor steel structure can use solvent-based or water-based fire coatings.

The fireproof coating that domestic some manufacturer produce, when encountering fire, decompose poisonous gas. If this paint is used in refractory electrical products, it will release poisonous gases in case of fire. For example, the use of G60 has been eliminated over vinyl chloride fire coatings, when the fire will decompose out of toxic chlorine gas, so can not choose.

The stand or fall of fireproof coating construction also has effect to the fireproof property of material, accordingly, the besmeth that needs to take fireproof coating seriously quality. The besmear method of different fireproof coating has a little difference, but its basic construction gist is identical.