通过以0.3%MgCl2溶液为介质的浸渍干湿循环加速腐蚀试验，研究了Corten-A耐候钢在干/湿环境下的腐蚀行为.扫描电镜(SEM)和能量色散X射线谱(EDX)观察分析了各腐蚀循环下的腐蚀形貌及Cl、Mg元素含量的变化.结果表明Corten-A钢的腐蚀失重与循环次数呈线性关系.腐蚀产物中的晶体相初期主要是β-FeOOH，后期主要是γ-FeOOH和少量的ε-Fe2O3.电化学测试表明铁锈的还原反应加速了阴极反应;锈层的电容值比较大，说明锈层的结构比较疏松，不具保护性.
The corrosion behavior of Corten-A weathering steel was investigated by immersion-dry-wet accelerated corrosion test in 0.3% magnesium chloride solution.By using SEM and EDAX technology,the corrosion images as well as the contents of the chloride ion and magnesium under different cycles were provided.It appeared linear relationship between the weight loss and corrosion test cycles.In early stage the main crystal product is β-FeOOH,in late period it is γ-FeOOH with few ε-Fe2O3.The result of the electrochemical tests showed that the cathodic reaction was accelerated due to the reduction of the rust;the large amount of the rust indicated that structure of the rust was loose and the rust did not have protection ability.
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