Abstract: A method and apparatus of forming a layer of a metal or metal alloy on the surface of a workpiece by means of electrolytic plating, the workpiece being used as the anode. An electrolyte containing ion of at least one metal with which the workpiece is to be coated is caused to move by means of a resilient and electrically insulating material which is arranged on the anode and which is brought into contact with and adapts to the surface of the workpiece and is caused to move relative to said surface in a manner such that electrolyte and gases formed in said electrolyte are conveyed away at said surface and a low electrolyte temperature is maintained. The anode covers the surface of the workpiece to be coated and carries a resilient and electrically insulating material which divides the space between the workpiece and the anodes into cavities and acts as an electrolyte and gas conveyor and is in contact with the surface to be coated.

Abstract: A method and apparatus for providing a surface coating of a metal or metal alloy on the wall of an elongate cavity in a workpiece by means of electrolytic plating, the workpiece being used as cathode. An electrolyte containing ions of the metal intended for the coating is brought into movement inside the cavity with the aid of a conveyor, which consists of a resilient and electrically insulating material such as a perforated, net-like or fibrous strip, and which is wound helically round the anode. The strip is fringed or slit on the edge facing towards the cavity wall to form outstanding resilient fingers which are in contact with the cavity wall.

Abstract: A method and apparatus for providing a surface coating of a metal or metal alloy on the wall of an elongate cavity in a workpiece by means of electrolytic plating, the workpiece being used as cathode. An electrolyte containing ions of the metal intended for the coating is brought into movement inside the cavity with the aid of a conveyor, which consists of a resilient and electrically insulating material such as perforated, net-like or fibrous strip, and which is wound helically around the anode. The strip is fringed or slit on the edge facing towards the cavity wall to form outstanding resilient fingers which are in contact with the cavity wall.