利用SEM/EDX和XRD等手段,用热重法对纯Cr于650～850℃在含有少量气态ZnCl2的氧气中的腐蚀行为进行了研究,并从热力学角度探讨了腐蚀机理.结果表明,随着试验温度的升高和混合气氛中ZnCl2体积分数的增加,Cr的腐蚀明显加剧;本文试验条件下试样皆生成疏松的表面腐蚀产物膜;ZnCl2与表面Cr2O3发生反应,不但破坏了试样表面氧化膜的完整性,而且释放出Cl2导致"活化氧化".
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