长时间处于高温环境中,金属易发生氧化腐蚀,从而丧失机械性能直至破坏,严重影响了使用效能的发挥.在金属表面涂覆耐高温涂层,因施工简便、成本较低、耐热性能好等优点而获得广泛应用,对于防止材料高温腐蚀、节约资源等具有重要的经济意义.对目前常用的耐高温涂料进行分类,包括有机耐高温涂料和无机耐高温涂料两大类,重点介绍了有机硅树脂耐高温涂料和无机耐高温涂料,并简单描述了有机-无机复合耐高温涂料的有关情况.对不同类别耐高温涂料的化学组成、物理性能和耐热机理等进行了阐述,并结合涂料的结构特点对各自优缺点进行了分析与比较.根据耐高温涂料在现代工业发展中的重要作用,介绍了国内外关于耐高温涂料的研究进展和应用情况,指出了不同类别耐高温涂料在使用过程中存在的问题.最后结合当前工业社会向信息化社会转变的时代背景以及研究耐高温涂层的技术意义,对耐高温涂料的发展趋势进行了展望.
Metal was susceptible to oxidation corrosion when being placed in high temperature surroundings for a long time,leading to loss of mechanical properties and even complete damage,thus seriously affecting development of application performance.As a widely used heat-prevention technology featuring in simple construction,low cost and good heat resistance,depositing high temperature resistant coatings on metal surface was of great economic significance to prevent high temperature corrosion and save resources.The common high temperature resistant coatings were classified in this paper,including organic and inorganic categories.The organic silicone resin and inorganic coatings were introduced in detail,while the organic-inorganic compound high temperature resistant coatings were described in brief.Chemical composition,physical property and heat-resisting mechanism were expounded.Merits and demerits of the coatings were analyzed and compared by combining their structural features.According to the important role of high temperature resistant coatings in modem industrial development,research progress and application status of such high temperature resisting coatings at home and abroad were introduced,the problems of different coatings present during application were also proposed.Finally,the developing tendency is expected by referring to time background of transforming to informational society from industrial society and technical significance of studying such coatings.
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