电化学制备微米多孔铁箔

Electrochemical preparation of microporous iron foil

介绍了电化学法制备微米多孔铁箔的工艺。先以纯钛片为基体,采用电沉积法制得纯铁箔,电解液组成和工艺条件为:FeCl2·4H2O 300～400g/L,CaCl2 111g/L,H3BO3 15g/L,LaCl3·4H2O 37g/L,pH 0.1～0.4,电流密度50A/dm2,温度95～105℃,时间5min。再以纯铁箔作阳极,纯钛片作阴极,在相同的电解液中对纯铁箔进行阳极腐蚀,从而获得多孔铁箔。研究了阳极腐蚀时间、电流密度及温度对多孔铁箔表面形貌的影响。阳极腐蚀的最优工艺条件为:电流密度25A/dm2,温度85℃,时间2.5min。最佳工艺下可制得孔径为1～10μm、孔密度高于10000个/cm2的微米多孔铁箔。

A process for electrochemical preparation of microporous iron foil was introduced. A pure iron foil is prepared by electrodeposition with pure titanium plate as substrate from an electrolyte containing FeCl24·H2O 300-400 g/L, CaCI2111 g/L, H3BO315 g/L, and LaCI3·4H20 37 g/L at temperature 95-105 ℃, pH 0.1-0.4, and current density 50 A/dm^2 for 5 min. The porous iron foil is obtained by anodic corrosion in the same electrolyte using the pure iron foil as anode and the pure titanium plate as cathode. The effects of anodic corrosion time, current density, and temperature on the surface morphology of porous iron foil were studied. The optimal process parameters of anodic corrosion are as follows： temperature 85 ℃, current density 25 A/dm^2, and time 2.5 min. The microporous iron foil obtained under the optimal conditions features a pore size of 1-10μm and a pore density of 10 000 holes per cm^2.