为了提高毛化特征轧辊的耐磨性,在制造9Cr2Mo钢轧辊表面电沉积40μm凸包状毛化铬镀层.通过电化学测试和盐雾试验研究了镀铬层和9Cr2Mo钢基体的腐蚀行为.电化学测试表明,镀铬层的耐蚀性明显优于基体.扫描电镜观测表明,经盐雾试验51h的基体出现大量腐蚀产物FeO,而镀铬层腐蚀产物细小且集中在表面裂纹附近,主要成分同样为FeO.镀铬层截面金相观察表明,盐雾通过铬层裂纹进入镀层和基体界面产生腐蚀,腐蚀产物通过裂纹通道扩散出来.
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