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Cu对低合金高强耐候钢耐蚀性的影响

, PP. 318-322

Keywords: 耐候钢,耐蚀性,周期浸润,富集

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Abstract:

采用周期浸润加速腐蚀实验,模拟实际大气腐蚀环境,研究了Cu含量对含Cr低合金高强耐候钢耐蚀性的影响规律.利用扫描电镜(SEM)和X射线衍射仪(XRD)等手段检定腐蚀的深度、腐蚀产物膜中元素分布及其相组成.结果表明,当Cu含量较低时,锈层容易从表面剥离,使侵蚀性溶液渗入,钢的失重速率增高;随着Cu含量的增加,锈蚀的深度明显降低,同时由于Cu与Cr共同在锈层的内部富集,增加锈层的致密度,使钢的失重速率明显降低.

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