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1概况黄浦江某大桥钢箱梁涂装总面积大于10万m2。1995年涂装施工结束,按业主和设计单位的指定,当时使用了上海开林造漆厂的产品。钢箱梁外侧涂层配套方案见表1。根据ISO12944—2国际标准中关于大气腐蚀等级的分类,大桥钢箱梁处于C3中等腐蚀环境中,即“城市和工业大气,中等的二氧化硫污染、低盐度沿海区域”。在C3腐蚀环境条件下暴露1年后,单位面积上低碳钢质量损失率为200～400g/m2,
1 Overview Huangpu River Bridge over a total of more than 100000 m2.1995 annual output of more than 100000 m2.1995 annual Shanghai Lin coating plant used in the paint. Steel box beam coating program shown in Table 1. According to the ISO12944-2 international standards on the classification of atmospheric corrosion grade, the bridge steel box girder is in C3 medium corrosive environment, namely “urban and industrial atmosphere, moderate sulfur dioxide pollution, low salinity coastal area”. After exposed for one year under C3 corrosive environment conditions, the mass loss rate of low carbon steel per unit area is 200 ~ 400g / m2,