【摘要】 采用模拟大气腐蚀试验装置,研究了湿度对热镀锌钢SO₂大气腐蚀行为的影响以及甘油水溶液湿度控制的影响因素。结果表明,采用甘油水溶液控制湿度时,为保证湿度控制准确,甘油水溶液与控湿空间的容积之比为1/100～1/125左右为宜,腐蚀挂片距甘油水溶液面的距离控制在150 mm以下为宜。镀锌钢在SO₂大气腐蚀环境下的初始腐蚀产物对进一步腐蚀具有抑制作用;在SO₂浓度相同的情况下,镀锌钢的大气腐蚀速率随湿度的增大而增大;镀锌层在SO₂大气腐蚀后出现突起和剥离,腐蚀产物呈现针状和层状,结构疏松。更多还原

【Abstract】 The action of humidity on SO₂ atmospheric corrosion of hot galvanized steel and the affecting factors for the glycerine-water solution humidity control method were investigated thoroughly.The volume ratio of 1/100～1/ 125 between the glycerine-water solution and the humidity controlling space and the distance no more than 150 mm were suggested from the coupons to the glycerine-water solution.In the same SO₂ concentration,the corrosion rate of the galvanized steel increased with the increase of the relative humidity.The zinc coating swelled and peeled from the substrate during the SO₂ atmospheric corrosion.The corrosion products showed an acicular and lamellar loose structure.更多还原