Abstract: A process for electrolytically treating aluminum or its alloys in the form of a strip, wire or foil material in a continuous manner which comprises continuously passing the material through an anodic oxidation treatment cell through which a direct current, alternating current or AC-superimposed direct current is caused to flow and an electrolytic coloring cell through which an alternating current or AC-superimposed direct current is caused to flow and carrying out electrolysis in both said cells to anodize and color the material in a continuous manner.

Abstract: In a metal surface treatment apparatus in which a work article is immersed successively in a plurality of treatment tanks disposed in a line and containing respective treatment liquors, a traveling crane handling the work article in this operation is automatically controlled to travel over the tanks with a repeated horizontal speed pattern comprising an initial period of steady acceleration from the center of each tank, a period of high speed, and a period of deceleration upon approaching the center of the succeeding tank, at which the crane is stopped, and is automatically controlled to lower and raise the work article at the center of each tank with a vertical speed pattern comprising, in sequence, an initial period of descent at low speed, a period of high speed, a period of low speed as the lower end of the article approaches and enters the surface of the treatment liquor in the tank, a period of high speed, a period of low speed as the article approaches the lower limit of its descent, an initial period

Abstract: A continuous electrolytic treatment apparatus for anodic oxidation and electrolytic coloring operations on an object such as a strip, wire or foil of aluminum and its alloys, wherein there are provided electric field buffer means which comprises a plurality of self-standing plates of plastic resin or the like having an electrically insulating property. The electric field buffer means are located at least in one zone in the electrolytic cell so that it can serves to effectively buffer concentration of excessive electric current to the interface between the object and the electrolytic solution at the above mentioned zone, thereby preventing burning in the surface of the object or in the oxide film formed thereon during the anodic oxidation treatment and unevenness in coloring of the object during the electrolytic coloring operation due to such current concentration, particularly when treating with a high current density.

Abstract: A process for electrolytically treating aluminum or its alloys in the form of a strip, wire or foil material in a continuous manner which comprises continuously passing the material through an anodic oxidation treatment cell through which a direct current, alternating current or AC-superimposed direct current is caused to flow and an electrolytic coloring cell through which an alternating current or AC-superimposed direct current is caused to flow and carrying out electrolysis in both said cells to anodize and color the material in a continuous manner.