Hainan Steel remind you: fireproof steel structure fire retardant coating principle and the existence of doubt

Hainan Steel remind you: fireproof steel structure fire retardant coating principle and the existence of doubt

Hainan steel as the primary form of modern architecture, with a light weight, high strength, good shock function, short construction period, building high degree of industrialization, the advantages of large space utilization at room temperature, but the steel structure fire resistant construction characteristics of poor function also very obvious. Although steel is a non-combustible material, but it is an excellent heat conduction carriers. Steels at temperatures beyond 300 degrees after a significant decline in the yield point and ultimate strength, reached 600 degrees intensity is almost zero. Science experiments and examples show, did not add maintenance steel structure in case of fire, just 15 minutes, the temperature will rise to over itself 540 degrees, so that members of their own distorted, resulting in the destruction of the buildings collapsed, deformed steel construction use can not be repaired. Thus, the steel structure is necessary to take measures to maintain the fire. Steel structure fire a variety of maintenance measures, such as the use of insulation, refractory isolated direct flame burning steel structure, heat transfer rate of decline postponed steel structure temperature, strength becomes weak moment and so on.
Hainan steel structure fire method mainly paint maintenance, Firewood maintenance, concrete maintenance, flexible membrane maintenance, inorganic fiber maintenance, water cooling and maintenance within the structure. In the meantime, fire retardant paint brushing construction convenient, light weight, low cost, component geometry without restrictions, most widely used scale, the highest efficiency.
Hainan fireproof coating that is applied to the surface of the building and construction of steel structures, maintenance of fire-resistant insulation layer can be constructed in order to improve the fire resistance of the steel structure of the coating, the principle is the use of heat insulation material or direct flame burning isolated steel structure decrease heat to speed delivery of steel, steel structure postpone temperature rise and weakening of the moment. Now, domestic and foreign steel structure fire retardant coating is mainly composed of a matrix resin, catalyst, into carbon agents, blowing agents and the like.
Matrix resin compatible with the other ingredients, both to ensure the paint under normal conditions with a variety of application functions, but also has a flame resistance and excellent expansion foam flame burning or function under high temperature conditions. Typically, the higher the quality of the acrylic resin carbonized layer fire retardant coating, it is usually an acrylic resin as the main film-forming material, and it was modified in order to improve the overall effect of the coating.
A catalyst is a break down under certain conditions, the substance of phosphoric acid, phosphoric acid decomposition polyol dehydration, so that it constitutes a non-flammable carbonized layer structure of three-dimensional space. Generally, the more water-soluble melamine phosphate Hangout ammonium phosphate, and both catalytic and foaming double effect, now the main choice of melamine phosphate as catalyst.
A carbon coating layer agent is the material basis of three-dimensional structure of non-flammable foam carbonized layer at a high temperature, carbonized layer of foam from the skeletal effects. A carbon agent on the decomposition temperature and the catalyst for a match, when using polyphosphate amine catalyst on the application of high thermal stability of high-carbon-containing polyol made carbon agents, such as pentaerythritol, di-amyl alcohol ultra-thin fireproof coatings season Guangdong Daya Bay Nuclear Power Plant for the bare frame houses reached than 10 years ago, can still be used normally. But its drawback is the construction smell great, coating easy to aging, starch. Starch made using carbon agent, water-resistant coating doubt difficult to deal with, and dipentaerythritol reasons because of its price in the domestic rarely used, is now widely used by domestic pentaerythritol as fire retardant coating to carbon agent. Hainan Steel
Intumescent fire retardant coating effect only in the blowing agent to produce expansion layer at a high temperature flame. In case of fire foaming agent decompose and release ammonia, water, carbon dioxide, hydrogen halide nonflammable gas, the coating foaming expansion in the case of arrival of a softening point to form a sponge-like structure.
But now there are also fire retardant coating technology questions. The first is the question of durability. Due to the presence of thick fireproof coating since the major decorative poor, and thus can only be applied in some of the appearance of the less demanding outdoor steel structure. Widely used is thin and ultra-thin steel structure fire retardant paint, especially ultra-thin. This main raw material by the use of two types of coating ammonium polyphosphate, melamine and pentaerythritol are poor water resistance, exist with the environment, time and so on dissolution, decomposition, degradation and aging of doubt, therefore, such coatings will certainly over time fire protection function decreased, but not yet to figure out a way to assess the durability of fire retardant coating. Fire resistance of the inspection report is given in the test results after the paint coating maintenance 1-2 months, but the fires are not speculation, fire, perhaps one year after the paint coat, but also maybe in 10 years after Tu occur, thus Intumescent most important is the durability of the doubt.
Followed by security questions. Now expanded steel structure fire retardant coating in a fire there may release ammonia, HCN, hydrogen halide, nitric oxide, nitrogen dioxide, carbon monoxide, carbon dioxide, chlorine, bromine and other poisonous gases. If the concentration of these gases endure beyond the limits of the human body, they will not escape the fire on the officers and firefighters harm.
Production and construction of steel structure fire retardant coatings, there are some doubts. Most domestic steel structure fire retardant coating production company is small, the production process automation technology level is not high, some companies still in the hands of the workshop type in operation, many products of very different formulation technology, dedicated to fire-resistant coating materials research insufficient inspection of raw materials, control is not enough, check the way the production process was incomplete, construction equipment, progress needs to be improved, and the rust of not supporting a rigorous test.
In addition, the testing method for steel structure fire retardant coatings, inspection standards and inspection standards difference member and member of the practice of engineering, there are some practical questions, such as how to use the inter-standard steel components and steel beams should be in terms of how to determine practical application of the coating thickness steel member countries do not have provisions.

Hainan steel as the primary form of modern architecture, with a light weight, high strength, good shock function, short construction period, building high degree of industrialization, the advantages of large space utilization at room temperature, but the steel structure fire resistant construction characteristics of poor function also very obvious. Although steel is a non-combustible material, but it is an excellent heat conduction carriers. Steels at temperatures beyond 300 degrees after a significant decline in the yield point and ultimate strength, reached 600 degrees intensity is almost zero. Science experiments and examples show, did not add maintenance steel structure in case of fire, just 15 minutes, the temperature will rise to over itself 540 degrees, so that members of their own distorted, resulting in the destruction of the buildings collapsed, deformed steel construction use can not be repaired. Thus, the steel structure is necessary to take measures to maintain the fire. Steel structure fire a variety of maintenance measures, such as the use of insulation, refractory isolated direct flame burning steel structure, heat transfer rate of decline postponed steel structure temperature, strength becomes weak moment and so on.
Hainan steel structure fire method mainly paint maintenance, Firewood maintenance, concrete maintenance, flexible membrane maintenance, inorganic fiber maintenance, water cooling and maintenance within the structure. In the meantime, fire retardant paint brushing construction convenient, light weight, low cost, component geometry without restrictions, most widely used scale, the highest efficiency.
Hainan fireproof coating that is applied to the surface of the building and construction of steel structures, maintenance of fire-resistant insulation layer can be constructed in order to improve the fire resistance of the steel structure of the coating, the principle is the use of heat insulation material or direct flame burning isolated steel structure decrease heat to speed delivery of steel, steel structure postpone temperature rise and weakening of the moment. Now, domestic and foreign steel structure fire retardant coating is mainly composed of a matrix resin, catalyst, into carbon agents, blowing agents and the like.
Matrix resin compatible with the other ingredients, both to ensure the paint under normal conditions with a variety of application functions, but also has a flame resistance and excellent expansion foam flame burning or function under high temperature conditions. Typically, the higher the quality of the acrylic resin carbonized layer fire retardant coating, it is usually an acrylic resin as the main film-forming material, and it was modified in order to improve the overall effect of the coating.
A catalyst is a break down under certain conditions, the substance of phosphoric acid, phosphoric acid decomposition polyol dehydration, so that it constitutes a non-flammable carbonized layer structure of three-dimensional space. Generally, the more water-soluble melamine phosphate Hangout ammonium phosphate, and both catalytic and foaming double effect, now the main choice of melamine phosphate as catalyst.
A carbon coating layer agent is the material basis of three-dimensional structure of non-flammable foam carbonized layer at a high temperature, carbonized layer of foam from the skeletal effects. A carbon agent on the decomposition temperature and the catalyst for a match, when using polyphosphate amine catalyst on the application of high thermal stability of high-carbon-containing polyol made carbon agents, such as pentaerythritol, di-amyl alcohol ultra-thin fireproof coatings season Guangdong Daya Bay Nuclear Power Plant for the bare frame houses reached than 10 years ago, can still be used normally. But its drawback is the construction smell great, coating easy to aging, starch. Starch made using carbon agent, water-resistant coating doubt difficult to deal with, and dipentaerythritol reasons because of its price in the domestic rarely used, is now widely used by domestic pentaerythritol as fire retardant coating to carbon agent. Hainan Steel
Intumescent fire retardant coating effect only in the blowing agent to produce expansion layer at a high temperature flame. In case of fire foaming agent decompose and release ammonia, water, carbon dioxide, hydrogen halide nonflammable gas, the coating foaming expansion in the case of arrival of a softening point to form a sponge-like structure.
But now there are also fire retardant coating technology questions. The first is the question of durability. Due to the presence of thick fireproof coating since the major decorative poor, and thus can only be applied in some of the appearance of the less demanding outdoor steel structure. Widely used is thin and ultra-thin steel structure fire retardant paint, especially ultra-thin. This main raw material by the use of two types of coating ammonium polyphosphate, melamine and pentaerythritol are poor water resistance, exist with the environment, time and so on dissolution, decomposition, degradation and aging of doubt, therefore, such coatings will certainly over time fire protection function decreased, but not yet to figure out a way to assess the durability of fire retardant coating. Fire resistance of the inspection report is given in the test results after the paint coating maintenance 1-2 months, but the fires are not speculation, fire, perhaps one year after the paint coat, but also maybe in 10 years after Tu occur, thus Intumescent most important is the durability of the doubt.
Followed by security questions. Now expanded steel structure fire retardant coating in a fire there may release ammonia, HCN, hydrogen halide, nitric oxide, nitrogen dioxide, carbon monoxide, carbon dioxide, chlorine, bromine and other poisonous gases. If the concentration of these gases endure beyond the limits of the human body, they will not escape the fire on the officers and firefighters harm.
Production and construction of steel structure fire retardant coatings, there are some doubts. Most domestic steel structure fire retardant coating production company is small, the production process automation technology level is not high, some companies still in the hands of the workshop type in operation, many products of very different formulation technology, dedicated to fire-resistant coating materials research insufficient inspection of raw materials, control is not enough, check the way the production process was incomplete, construction equipment, progress needs to be improved, and the rust of not supporting a rigorous test.
In addition, the testing method for steel structure fire retardant coatings, inspection standards and inspection standards difference member and member of the practice of engineering, there are some practical questions, such as how to use the inter-standard steel components and steel beams should be in terms of how to determine practical application of the coating thickness steel member countries do not have provisions.