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由于热镀锌钢板具有良好的耐蚀性 ,在建材行业已广泛地被使用。热镀锌钢板镀锌附着量 90～ 30 0ｇ/ｍ2 。在一般腐蚀环境下年腐蚀速度 5～ 10 ｇ/ｍ2 ,在海岸地带年腐蚀速度 2 0～ 30 ｇ/ｍ2 ,在盐分浓度高的地区热镀锌钢板寿命较短 ,需加以改进。新日铁公司为了满足土木建材行
As the hot-dip galvanized steel with good corrosion resistance, in the building materials industry has been widely used. Galvanized steel galvanized amount of 90 ~ 30 0g / m2. The annual corrosion rate is 5 ~ 10 g / m2 in the general corrosive environment and 20 ~ 30 g / m2 in the coastal zone. In the areas with high salt concentration, the hot-dip galvanized steel has a shorter life span and needs to be improved. Nippon Steel Corporation in order to meet the civil construction materials line