The role and development of fire-resistant coatings in expanded steel structures are progressing.

China Coatings Network
News: Expansion steel structure
proofing coatings
flame retardant effect is through the chemical reactions occurred in various components of the common results of organic coordination. The principle of flame retardant insulation is mainly realized by the following means:
(1) dehydrated carbon catalyst such as ammonium polyphosphate and other heat-absorbing decomposition to produce acid;
(2) polyhydroxycharides such as tetium glycol dehydrated into carbon at high temperatures and acid catalysis;
(3) the polymer substate is thermally melted and expands under the action of foaming agents such as melamine, further forming an expanding carbonized layer.
inflated steel structure fire prevention
coating
in the case of fire, its thickness rapidly expanded to dozens of times the original, up to two hundred times, the formation of honeycomb or spongy carbon layer on the steel fire action can be summarized For three aspects:
(1) barrier, the highly expanded carbonized layer can play a good role in the protection of the steel structure of air, heat source insulation, so as to effectively reduce the surface temperature of the steel structure, extend the support time of the steel structure in the fire;
(2) heat absorption, the softening of polymer coating, melting, the physical changes of the carbonized layer after expansion, as well as the thermal decomposition, evaporation and carbonization of the various components of the coating will absorb a large amount of heat, thus effectively reducing the surface temperature of the steel structure;
(3) to stop combustion, paint components by heat decomposition of various types of non-combustible gases can play a role in diluting the concentration of oxygen, and can capture the combustion of the resulting free fundamentals, thus effectively preventing combustion. The coordination of these three processes finally makes the expansion steel structure fire protection coating play an effective fire prevention role.
expansion steel structure fire-resistant coatings after these years of development, has achieved certain results, some products have begun commercial production. However, problems and shortcomings still exist, and there are still many unknown areas to explore. In the future, expansion steel structure fire protection coatings will be developed in the following aspects:
(1) to improve environmental stability, specifically, expansion steel structure fire protection coatings should not only have good fire resistance, but also have excellent environmental stability, its anti-chemical corrosion, anti-ultraviolet lighting and other properties directly affect the service life. Therefore, environmental stability is the focus of the current expansion steel structure fire protection coating can not be ignored;
(2) environmentally friendly expansion steel structure fire protection coating, will also be a new selling point. With the improvement of people's quality of life requirements, the chemical toxicity of fire-resistant coatings themselves and the toxicity of products produced during combustion are important aspects that should be considered by the institute in the future;
(3) to improve fire resistance, which is all fire-resistant coatings have been pursuing the importance of energy, expansion steel structure fire-resistant paint fire resistance increased by one minute, the protection of people's lives and property on a point, so the improvement of fire resistance will always be the focus of research;
(4) nano-modified expansion steel structure fire protection coating development, which is the recent rise of a paint modified direction, inorance functional nanoparticles scattered in the paint, the paint fire resistance will be much better than the use of ordinary inorgic nanoparticles, so as to obtain high-performance expansion steel structure fire protection coating.