1.耐久性
1. durability
因为厚型防火涂料存在自严重，装饰性差，因而只能使用在某些对外观请求不高的室外钢构造。广泛使用的是薄型和超薄型钢构造防火涂料，特别是超薄型。此两类涂料所使用的主要原料聚磷酸铵、三聚氰胺和季戊四醇均耐水性不良，存在跟着环境、时间等溶出、分化、降解和老化等疑问，因而，此类涂料必定会跟着时间的推移防火功能有所下降，而现在还没有找出一种鉴定防火涂料耐久性的办法。检查陈述所给出的耐火极限是涂料涂后养护1至2个月的查验成果，但火灾的发作是不行猜测的，火灾也许是在涂料涂后的1年，也也许在涂后的10年发作，因而胀大型防火涂料最主要的即是耐久性疑问。
Because thick fire retardant coatings are seriously and poorly decorated, they can only be used in some outdoor steel structures where the appearance requirements are not high. Widely used are thin and ultra thin steel structure fire retardant coatings, especially ultra-thin. The main raw material used in the two kinds of coating ammonium polyphosphate, melamine and pentaerythritol were poor water resistance, there followed the environment, time of dissolution, differentiation, aging and degradation of doubt, therefore, this kind of paint will follow the passage of time the fireproof function declined, but not yet to find an identification of fire retardant coating durability the way. Check the statements given by fire resistance coating after curing is 1 to 2 months of the inspection results, but the fire attack is not speculation, the fire may be in coating after 1 years, perhaps 10 years after the attack in the coating, thus expanding large fire retardant coating is the main durability question.
2.安全性
2. security
现在的胀大型钢构造防火涂料遇火有也许释放出氨、HCN、卤化氢、一氧化氮、二氧化氮、一氧化碳、二氧化碳、氯、溴等有毒有害气体。假如这些气体的浓度超过了人体忍耐极限，便会对未逃离火场的人员以及消防人员形成损害。
Now the expansion of large steel structure fire retardant coating, fire may release ammonia, HCN, hydrogen halide, nitric oxide, nitrogen dioxide, carbon monoxide, carbon dioxide, chlorine, bromine and other toxic and harmful gases. If the concentration of the gas exceeds the endurance limit of the human body, it will cause damage to people who have not escaped from the fire and fire fighters.
3.出产、施工国内多数钢构造防火涂料出产企业的规模不大，出产技术流程自动化水平不高，有部分企业还处于手艺作坊式在操作，不少产品的配方技术迥然不一样，对专用于防火涂料的原料研讨不行，对原材料的检查、操控不行，出产过程的检查手法不全，施工设备有待改善进步，与防锈漆的配套性也不能进行严厉的查验。
3., the majority of domestic production of construction of fire-resistant coating for steel structure production company size, production process automation level is not high, some companies still in the craft workshops in operation, formulation technology of many products are not the same, the dedicated fire retardant coating materials research not, manipulation of the raw material inspection, No. the production process inspection technique is not complete, the construction equipment needs to be improved and progress, supporting the antirust paint can not carry out strict inspection.
4.测验办法
4. test method
钢构造防火涂料作为一类功能性涂料，其功能主要有理化和耐火两方面构成。同样耐火极限的防火涂料因其使用环境不一样、受火类型不一样，对基材的维护效果也就不一样。
As a kind of functional coating, steel structure fire retardant coating is composed of two parts: function, rationalization and fire resistance. Similarly, fire retardant coatings have different maintenance effects because of their different environments and different fire types.
5.检查规范方面GB14907-2002《钢构造防火涂料》对同种防火涂料只规则一种涂层厚度的查验陈述，而实践工程中因为钢梁、钢柱、钢楼板规范所请求的耐火极限各不相同，例如室内厚度为2mm的超薄型防火涂料检查陈述出具耐火极限为1.5h，实践工程请求钢梁、钢板、钢柱耐火极限分别为1.5h、1.0h、2.0h.对钢板、钢柱应采用何种厚度的防火涂料进行维护，现在不管从理论界或是实践工程均缺乏相应的研讨。
5. check the standard GB14907-2002 "steel structure fireproof coating" of the same rule only a fireproof coating thickness of the coating inspection statements, and the fire resistance limit of practical projects because of steel beam, steel column, steel floor specification requested vary, such as indoor ultra-thin fireproof coating inspection issued statements of 2mm fire resistance is 1.5h the practice of engineering, steel, steel, steel for maintenance of the fire resistance of the columns were 1.5h, 1.0h and 2.0h. on the steel plate, steel column should adopt the thickness of fireproof coating, now no matter from theory or practice engineering are lack of corresponding research.
6.检查规范构件与实践工程构件的差异性
6. check the difference between standard component and practical engineering component
耐火极限查验中使用的基材是Q235的规范I36b或I40b热轧一般工字钢梁，而实践工程运用中，钢构件的截面尺度各种各样。查验陈述中描绘的钢梁与实践工程中的钢构件并无彻底的对应联系，实践使用的钢构件和规范钢梁间应当怎么进行换算，怎么断定实践使用的钢构件的涂层厚度，国家尚无规则。
The base material used in the inspection of fire resistance is Q235 standard I36b or I40b hot rolled general I-beam steel, and in practice engineering, the steel member has a wide range of sectional dimensions. The inspection of steel beam and engineering practice in depicting the statement of steel does not completely correspond, practice of using steel components and steel beam should be how to regulate the conversion, how to determine the thickness of the coating used in practice of steel member countries, there is no rule.
 

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