The kinetics of forming process of pulse current anodized film on AZ91D Mg alloy was studied by the voltage-time and thickness-time curves.The surface morphology,structure,elemental constitution and valences of the an...The kinetics of forming process of pulse current anodized film on AZ91D Mg alloy was studied by the voltage-time and thickness-time curves.The surface morphology,structure,elemental constitution and valences of the anodic films were analyzed by SEM,EDS,XPS and XRD respectively.The results show that the film-forming process can be divided into four stages.Formation of a dense layer before sparking is the first stage.Formation of a porous layer accompanied with slight sparking is the second stage.The third stage is characterized by fast growth of the porous layer accompanied with more intensive sparking.The fourth stage starts after the sparking process becomes even more vigorous and the pores become large.展开更多
基金Project(03H51016)supported by the Aeronautical Science Research Foundation of ChinaProject(2032009)supported by the Natural Science Foundation of Beijing,China
文摘The kinetics of forming process of pulse current anodized film on AZ91D Mg alloy was studied by the voltage-time and thickness-time curves.The surface morphology,structure,elemental constitution and valences of the anodic films were analyzed by SEM,EDS,XPS and XRD respectively.The results show that the film-forming process can be divided into four stages.Formation of a dense layer before sparking is the first stage.Formation of a porous layer accompanied with slight sparking is the second stage.The third stage is characterized by fast growth of the porous layer accompanied with more intensive sparking.The fourth stage starts after the sparking process becomes even more vigorous and the pores become large.
