论文部分内容阅读
利用磁控溅射技术制备出了晶粒尺寸为20 nm-30 nm的Fe-10Cr合金涂层.通过动电位极化曲线、电化学阻抗谱图(EIS)和Mott-Schottky分析等电化学测试手段,探讨了Fe-10Cr纳米涂层在0.05 mol/L H2SO4+0.25mol/L Na2SO4溶液中的钝化性能。发现纳米化使材料的活性溶解增强;在钝化膜形成过程中Cr更容易富集,从而更容易钝化;纳米化后,材料表面钝化膜中的载流子密度下降,化学稳定性提高.
The Fe-10Cr alloy coating with grain size of 20 nm-30 nm was prepared by magnetron sputtering technique. Electrochemical tests such as potentiodynamic polarization curve, electrochemical impedance spectroscopy (EIS) and Mott-Schottky analysis The passivation properties of Fe-10Cr nano-coating in 0.05 mol / L H2SO4 + 0.25 mol / L Na2SO4 solution were discussed. It is found that the nanocrystallization enhances the dissolution of the material. Cr is more easily enriched during passivation film formation and is more easily passivated. After nanocrystallization, the carrier density in the passivation film decreases and the chemical stability increases .