【作者】 范晓勇；

【导师】 余历军；

【作者基本信息】 西北大学 ， 化工过程机械， 2009， 硕士

【摘要】 钢结构作为21世纪的一种绿色环保结构,被广泛的应用于建筑和构筑物结构中。但是钢结构在应用过程中存在着两大看不见的隐患:火灾和腐蚀。低的耐火性能和易腐蚀性可以导致较大的人员伤亡和巨大的经济损失。采用有效的保护措施是必要的。目前,采取涂料进行保护是一种最经济、最有效的保护方法。但是通常将钢结构防火和防腐蚀独立对待即既要用防腐蚀涂料进行防腐蚀保护,又要用防火涂料进行防火保护,导致很大浪费。而且这些涂料普遍存在着粘结性能差、质量不稳定、耐候性及耐久性差等问题,应用范围受到限制。本文正是基于解决和改善上述问题,拟在研制出一种新型钢结构超薄型防火防腐蚀涂料,具有防火和防腐蚀的双重特性,而且有良好的装饰性能。通过对防火和腐蚀机理进行研究,选定以有机硅改性丙烯酸树脂为基料,配以P-C-N阻燃体系,并加入适量的颜填料、防锈剂、流平剂和流变助剂和溶剂混合搅拌制得。本文通过正交试验设计优化了该钢结构超薄防火防腐蚀涂料的组分,并主要以粘结强度和耐火极限为指标进行性能评价,研制出一种超薄防火防腐蚀涂料的配方。试验结果表明:基料树脂对涂料的耐火性能影响显著,对粘结强度起主要决定作用。炭质层质量对防火性能影响较大,涂料的施工工艺及固体原料颗粒度对防火性能有所影响。加入聚磷酸铝助剂后,防锈蚀功能显著。将本文研制的防火防腐蚀涂料与现有的涂料进行对比,表明本涂料具有阻燃时间长,粘结强度高、具有一定的耐候性、耐久性和防腐蚀性,达到国家标准的综合性能良好的钢结构超薄型防火防腐蚀涂料。更多还原

【Abstract】 Steel structure is a structure of green environmental protection eco-type, it is widely used in architectural structures and structure foundations. But fire damage and corrosion was regarded as two large unseen existing hidden troubles in the application of steel structure. Low fire-resistant property and susceptibility to corrosion property cause so many casualties and large economic loss. So it is necessary to take some effective protection measures.At present, it’s the most effective, economical, and practical to brush coatings on them directly. But it is usual to treat fireproof and anti-corrosion of steel structure independently. Or rather to say ,it not only need anti-corrosion coating to protect but also need fire retardant coating to fordend, causing great waste. However, this combination of coating also has some disadvantages such as poor bouding performance, the instable quality, low weatherability and durability and so on, so the application scope of the coating was limited.This thesis is based on solving and improving those problems, in order to develop a new super thin fire retardant and anti-corrosion coating of steel structure, which has dual characters :fire resistance and anti-corrosion, and has good adornment performance. Through researching on fire-retardant and corrosion mechanisms, silicone-acrylate resins was selected as based material, cooperate with the fire retardant system of P-C-N, add proper other components such as pigment and filler, rust inhibitor, flow agent, rheological agent and solvent, the coating was obtained by mixture stirring. The author optimized the components of coating through orthogonal experiment design and evaluate them mainly by the bonding strength and refractory limit evaluation indexes. The optimal formula was got, a new super thin fire retardant and anti-corrosion coating of steel structure was obtained at the same time.The results of this experiment shows that binder resin have significant effect on the refractory properties of coating and play a decisive role in bonding strength. The quality of carbonaceous layer has a great influence on refractory property. Construction technology and particle size of solid materials have some influence on refractory property. The function of antirust are remarkably when adding poly-aluminium phosphate.At last, taking the comparative testing with the existing fire retardant coating , it is revealed that the coating have longer flame retardant time, higher bonding strength. Moreover, super thin fire retardant and anti-corrosion coating of steel structure has certain weatherability, durability and corrosion resistence, which is also meet the national standards.更多还原