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同时采用循环加载及模拟加速腐蚀的方法,研究循环载荷对耐候钢在含氯离子气氛中腐蚀行为的影响。锈层截面形貌以及带锈电极的电化学极化行为和阻抗谱表明,在相同的拉伸时间内,腐蚀周次较低时,耐候钢能较快获得稳定的锈层;腐蚀周次较高时,在长时间的循环载荷影响下,MnCu耐候钢的外锈层会更易产生裂纹甚至脱落,但内锈层结构相对稳定而基本不受一般载荷的影响,因此MnCu耐候钢依然具有良好的耐候性。
At the same time, cyclic loading and simulated accelerated corrosion method were used to study the influence of cyclic loading on the corrosion behavior of weathering steels in chloride ion-containing atmosphere. Electrochemical polarization behavior and impedance spectra of the rust layer and the rust-coated electrode indicate that the weathering steel can obtain a stable rust layer more quickly when the corrosion period is lower in the same stretching time; Under long-term cyclic loading, the outer rust layer of MnCu weathering steel will be more likely to crack or even fall off, but the structure of inner rust layer is relatively stable and generally not affected by the normal load. Therefore, MnCu weathering steel still has good Weatherability.