Research On Electroplating Of Aluminum In Ionic Liquid On Metal Substrate And Subsequent Preparation And Application Of AAO Template

Aluminum layer with certain thickness deposited on metal substrate (stainless steel and copper)has been prepared via an electroplating method in ionic liquid solution made up of [BMIC]-AlCl3(mole ratio=1:2). Some nanoscale or micronsized pores in the aluminum layer were fabricated witha subsequent anodization process: on one hand, prepare the corrosion cavities on the surface ofstainless steel substrate by using these micro pores as templates, remove the template layer at the end;on the other hand, use direct current electrodeposition method to get nickel deposited in the pores ofself-made anodized aluminum oxide (AAO), and remove partial AAO template to get anickel-microelectrode.In this thesis, we mainly obtained the following results: A certain thickness, dense, well adherentaluminum coating was obtained at temperature for50~55℃,1%(vol) toluene, current density for15~20mA/cm~2, plating time for40min; on this basis, some nanoscale or microsized porous formingin the aluminum coating through anodized processing; AAO template is different, prepared indifferent electrolytes: oxalic acid solution and sulfuric acid solution, AAO template formed in oxalicacid concentration of0.3mol/L, oxidation voltage of5~13V, temperature controlled at about10℃,and oxidation time for15~30min; with sulfuric acid solution as the electrolyte prepared AAOtemplate, the sulfuric acid concentration of160g/L, oxidation voltage of5~10V, temperaturecontrolled at about15℃, and oxidation time for10~15min.The corrosion cavities obtained in the metal substrate surface were different in the micro-porousdirectly fabricated by anodic oxidation in the pure aluminum plates, which was not the commonhexagon; in addition, at the same time both in the anodic oxidation in metal substrate surface formedcorrosion cavities can also remove the aluminum coating. The best technical parameter of electroplatingnickel in the self-made AAO template was: current density of70mA/cm~2, temperature for50℃, andplating time for1.5min.At last, we uses Scanning Electron Microscope (SEM) to observe the superficial morphologies ofaluminum coating, metal surface cavities and electroplate nickel; Energy Disperse Spectroscopy (EDS)to observe the component of aluminum coating and electroplate nikel; Cyclic Voltammetry (CV) todiscuss electrocatalysis and oxidation activites between nickel-microelectrode and nickel sheets.