【摘要】 采用原位反应铸造法制备了VCP/Fe复合材料.利用X射线衍射、X射线能谱对复合材料的相结构和微区成分进行了分析;利用金相显微镜、扫描电子显微镜对复合材料的微观组织进行了观察.通过测定复合材料及对比材料在1M H2SO4中(25℃)的阳极极化曲线,表明VCp/Fe复合材料的致钝电位Ecr与不锈钢(Cr18Ni9)接近,显著小于白口铸铁(15Cr3Mo),说明复合材料易于钝化;同时复合材料的钝化区域较宽,其钝化膜比较稳定,有较好的抗电化学腐蚀性能.98%浓硫酸和3.5%NaCl水溶液浸泡实验证明,复合材料的腐蚀速度与不锈钢相当,远小于白口铸铁,耐蚀性能优异.更多还原

【Abstract】 VCp/Fe composites were prepared by in-situ reaction casting.The phase structure and microanalysis of the composite were investigated by means of XRD and EDS.The microstructure was observed by metallurgical microscope and SEM.Anodic polarization curve of the composite and contrastive materials were also mensurated in 1M H2SO4(25℃).The experiment shows that passivation potential of the composite is close to stainless steel(Cr18Ni9) and is obvious below that of white cast iron(15Cr3Mo),Which means the composite can be passivated easily.And the composite has a longer passivating region as well as a relative stable passivation layer,which means it has excellent electrochemical corrosion resistance.The experiment of immersing in 98% H2SO4 and 3.5% NaCl solution shows that the corrosion rate of the composite is a little faster than that of stainless steel,but much slower than that of white cast iron.It is obvious that the composite has outstanding anticorrosive properties.更多还原