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采用自制大气腐蚀模拟试实验装置,并结合电化学阻抗及开路电位测试技术,研究了在干湿交替作用下,不同破损面积的输电杆塔用镀锌钢在NaCl和NaHSO3腐蚀介质共同污染下的腐蚀行为。结果表明,随着破损面积以及暴露时间的增加,电极的开路电位逐渐正移,同时电极的腐蚀速率也会随着破损面积的增加而增加,不同破损面积的样品的腐蚀速率在初期随暴露时间的增加而增加,后期逐渐减小。
Using the homemade atmospheric corrosion simulation test device, combined with the electrochemical impedance and open circuit potential test technology, under alternating wet and dry corrosion of galvanized steel with different damaged areas of transmission towers in the joint pollution of NaCl and NaHSO3 corrosive media behavior. The results show that with the increase of the damaged area and the exposure time, the open circuit potential of the electrode gradually moves forward and the corrosion rate of the electrode increases with the increase of the damaged area. The corrosion rate of the samples with different damaged areas increases with the exposure time Increase and increase, the latter gradually reduced.