The development trend of fire retardant coating of steel structureThe saltSteel structure fire protectionThe trend of development, points out its developing direction for ultra-thin, corrosion resistance and water. Key words: fireproof paint; Steel Structure Building; Anticorrosive coatings 1Steel structure fire protectionAs the necessity of the urban population intensive, residential construction of high-rise and the wide use of new building materials, increasing the possibility of a fire, fire accident harm to people's lives and property has become one of the main threat to the urban disaster. All over the country in recent years the fire accident, caused heavy casualties and property losses, shocking. Building the cause is complex. In general, it is very difficult to absolutely put an end to the happening of the fire. Once fire happens, stop the rapid spread of the fire, rescue make people have enough time to leave the scene, for narrowing the scope of disasters, avoid the significant loss of property has more important practical significance. Is fire retardant coating materials play a protective role. Fireproof paint is a kind of coating on the surface, with functions of thermal insulation, fire, flame retardant, and can effectively delay the development of the fire, stop the spread of flame, the base material of special protective coating. Steel without any fire prevention measures, the flame for 15 min can be out of shape. Fire retardant coating and the coating quality, can make its deformation time extended to more than 30 min, to win the precious time for extinguishing the fire. Therefore, as a fire retardant coating is simple with high efficiency, wide applicability of fire prevention measures, has been more and more get the attention of people. Currently existing steel structure fire retardant coatings at home and abroad there are two major categories: the expansion type fire retardant coating and expansion type fire retardant coating, fire prevention of the former effect is poorer, has gradually been eliminated, and the expansion of steel structure fireproofing coatings by Albi chemical companies in the United States first invented in 1948. Albi chemical company is the world's first production of water-based, light-weight, expansion of steel structure fireproofing coatings enterprises. For the expansion of the steel structure fire retardant coating ALBICLAD800 and ALBICLADTF2 main product, the former for solvent-based coating, the latter for water-based paint. These two characteristics of fire retardant coating for: 100% do not contain asbestos, thin, lightweight and fireproof limit of up to 3 ~ 3.5 h, in a leading position in the world. Germany, Japan also very active in this field of research, has quite a few high performance products. But these don't have fire retardant coating corrosion resistance function, therefore it is mainly used for indoor fire of steel structure. Half a century this kind of thin intumescent fire coatings developed continuously, from the basic material to fire retardant additives are constantly, especially for the requirements of environmental protection in recent years, water-based fire coatings received extensive attention of people. Germany, the United States, Japan and other developed countries, annual output value of the expansion type fire retardant coating is in more than $10 million. The meaning of the 2 steel structure corrosion resistance of steel structure material is another big problem is easy to corrosion. With the rapid development of China's economic construction and the environment pollution, caused by the corrosion of steel and other metal waste is very big. Each year due to corrosion damage is difficult to measure. It is reported that in the UK each year caused by metal corrosion losses amounting to hundreds of millions of pounds; The United States each year because of the loss caused by metal corrosion accounted for about 4.2% of the gross national product (GNP); And every year the loss caused by metal corrosion in China about 2.3% of the gross national product (GNP). Metal anticorrosion means a lot, such as corrosion of metal materials, electrochemical protection, adding corrosion inhibitor, besmear brushs anticorrosive coatings, etc. Of which the most adopted anti-corrosion coatings generally. This is mainly due to the adoption of coating corrosion resistance using range is wide, construction is convenient, cost is low, and the effect of people and more satisfying. Anti-corrosion coatings as the main means of metal corrosion protection, countries invested a lot of manpower material resources for research for many years. Britain, the United States, Germany and Japan and other developed countries at present is still in the leading position. A wide variety of anti-corrosion coatings, mainly include: phenolic resin, epoxy resin, chlorinated polyvinyl chloride, polyurethane, furan resin, rubber, etc., used in different corrosion occasion. According to the report, Japan is corrosion coating consumed each year up to 2 trillion yen, for all kinds of anti-corrosion measures about 65% of the total cost of anti-corrosion coatings can be seen in the position in national economic construction. In our country through decades of efforts, in the field of anti-corrosion coatings has also made significant achievements, epoxy resin, chlorinated polyvinyl chloride, chlorosulfonated polyethylene, a large number of furan resins, polyurethane resins as raw materials of anti-corrosion coatings has been developed and successfully used in corrosion protection engineering. 3 improve corrosion resistant function of fire retardant coating is imperative so that for the research of fire protection coating and anti-corrosion coatings are has very important practical significance. Previous work is the metal corrosion and fire protection problems independently. Under normal circumstances, the anti-corrosion coatings cannot fire, and fire protection coatings do not have very good corrosion resistant function. For the same kind of metal parts, often should use anti-corrosion coatings for corrosion protection, and fire-proof paint for fire protection. In actual application of this is a big waste. So we assumed that since the object of protection is the same kind of metal material, and is in the form of coating, should and can be completely combined corrosion protection and fire the two function, make a kind of coating has the two function at the same time. Save resources, and strengthen the protection function of coating to the base material, have the effect of kill two birds with one stone. In 2002, the state has issued a new standard steel structure fireproofing coating, the standard steel structure fireproofing coatings can be divided into two types: indoor use and outdoor use. Which outdoor steel structure fireproofing coatings increased by wet and heat resistance, resistance to heat exposure, hot and cold cycle resistance, acid resistance, alkali resistance and salt fog corrosion resistance, etc. Steel structure fireproofing coating is moving toward practical application, muti_function change direction. But the anti-corrosion performance index request is not high, and it is as B class indexes, namely as a subsidiary performance of fire retardant coating, so it is not double functional coatings. Therefore, strengthen the anticorrosion function of fire retardant coating will be the future goal of fire retardant coating. 4 ultra-thin fire retardant coating is the development trend of domestic fire-retardant coating research began in the 1950 s, and first of all, from the perspective of the steel structure fire retardant coatings, which have a small-scale production in the 70 s. Early main fire retardant coating for steel structure of cement base of heavy coating, this type of coating in the early combustion can reduce the propagation velocity of flame, but once the fire is not work, fire prevention effect is poorer, is mainly used for fire rating occasions with low requirements. Since the 80 s began to develop in polymer materials for the thin and ultra-thin fire coatings, fire retardant coating makes research into a new era. Has developed to the current domestic fire-retardant coating including heavy type cement base, solvent-based and waterborne thin intumescent fire retardant coating fireproof coatings and finishing fire retardant coating, etc. Look from development trend, ultrathin steel structure fireproof coating will eventually replace heavy type and thin fireproofing coatings. The new national standard are formulated, fire retardant coating to ensure the healthy development of the ultra-thin steel structure fire retardant coatings. Ultrathin steel structure fireproof coating thickness is 2 mm or so commonly, while satisfies the requirement of fire protection, and has better decorative effect. At present our country has developed the fire endurance of more than 2 h ultra-thin steel structure fire protection coating thickness (2 mm), reached the international advanced level. 5 development of hydrocarbon fire prevention fire coatings will become the hot spot in recent years, the application of chemical building materials are common, composed of high polymer material chemical building materials and petrochemical enterprises involved in the fire was caused by the organic chemical raw materials, such as hydrocarbon fire fire. In addition, the auto fire in tunnel were also of hydrocarbon fire. Hydrocarbon fire and the building of the general difference is that the former has the characteristics of flame spread and heating speed, the combustion process may also be accompanied by because of the great oil the blast shock wave. Now, which generally can not adapt to the requirement of hydrocarbon fire fire retardant coating, and the test methods of hydrocarbon fire prevention materials are not applicable, therefore must according to use environment and characteristics of hydrocarbon fire protection materials to study hydrocarbon fire prevention fire anti-corrosion coatings. Look from the current development trend, hydrocarbon fire prevention fire coatings development and research will become one of the fireproof coatings research hot spot. 6 development of water-based fire anti-corrosion coatings is of great significance to date, the domestic steel structure fireproofing coatings mainly for solvent products, in production, construction and application are a large number of toxic solvent evaporation, damage to the environment. Despite domestic units are carrying out a research into the water-based fire protection coatings, but failed to fire and corrosion problems into account. Therefore developed which has the function of fire protection and anti-corrosion coating not only has theoretical value, but also has practical significance. Water-based fire anti-corrosion coating application prospect is very broad. According to public security department: food and beverage, entertainment venues, large supermarkets, such as chemical companies inside and outside of the buildingsteel frameStructure and interior decoration should be decorated with fire-retardant coating. In addition, the chemical, petroleum, pharmaceutical companies such as corrosion problems and caused by air pollution civil construction Steel Structure Building http://www.jingtabuilding.com/steel-structure-building.html corrosion problems are very serious. It is understood that only Shanghai petrochemical co., LTD. The annual anti-corrosion coatings and dosage on the fire retardant coating of thousands of tons, production value of tens of millions of yuan. The country all walks of life consumption is very large. 7 in the fireproof paint is a kind of functional coating with special significance, is directly related to people's lives and property security, relates to the social harmony and stability. Promote the use of which has the function of hydrocarbon fire prevention fire anti-corrosion coating, not only has the good economic efficiency, more important social benefits.
Steel structure industry also need to restructure?Stage quick release and steel production
http://jingtasteel.blogspot.com/2013/05/steel-structure-industry-also-need-to.html
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