镀锌钢构架在北美住宅环境中的耐蚀性能  

Anti-corrosion Performance of Galvanized Steel Framing in Residential Environments in North America

作　　者：孔纲[1,2] 刘玲艳[1] Rob White Doug Rouke 

机构地区：[1]华南理工大学材料学院,广州510640 [2]比利时布塞尔国际锌协会

出　　处：《腐蚀与防护》2010年第6期415-418,共4页Corrosion & Protection

摘　　要：钢结构住宅是未来住宅建筑的发展方向之一,而住宅钢结构防腐蚀寿命也成为钢结构住宅推广的关键因素之一。国际铅锌研究组织项目＂住宅镀锌钢构架在实际住宅环境下的耐蚀性研究＂通过选取北美4种典型的住宅环境,对锌及锌合金镀层钢铁试样进行了连续7年的暴露试验,并对镀锌钢构架在不同住宅环境中的腐蚀速率进行了评估。公布的研究结果表明,镀层质量为200-270 g/m^2的镀锌钢以及质量相当的锌合金镀层钢试样在4种环境下腐蚀速率均非常小,以所有试样中的最大腐蚀速率来评估镀锌及锌合金钢试样在4种环境下的使用寿命可达258-964年,平均574年。在住宅设计使用年限内,采用镀锌钢结构不会因腐蚀而使得钢结构性能降低。镀锌钢可以作为一种可持续性的建筑材料使用。Residential steel structure is one of development directions of residential buildings and the influence of corrosion on the durability of residential steel structure is one of the key factors that blocks its popularization.The project ＂Service life of galvanized steel framing for residential building＂ launched by the International Lead Zinc Research Organization was to measure the corrosion rates of actual zinc and zinc alloy coatings on steel framing samples during seven-year exposure in four different typical home environments in the USA and Canada.The results show that the coating corrosion of galvanized steel samples with the coating weight 200-270 g/m^2 was very small in those four kinds of environment and also was small for the samples with similar coating weight.The estimated life expectancy based on the maximum mass loss in all samples ranged from 258 to 964 years with an average of 574 years at all locations.It is clear that zinc coated steel components of a residential framing system will not be degraded by corrosion during the service life of a structure.Galvanized steel can be used as sustainable material in buildings.

关 键 词：镀锌钢 耐腐蚀 住宅建筑 

分 类 号：TG174.44[金属学及工艺—金属表面处理]