Outotec Oyj

Karri Osara

Veikko Polvi

Olli Hyvärinen

Michael H Barker

The invention relates to a method for forming a highly electroconductive surface on an aluminum piece. A highly conductive layer of silver is formed on the piece by means of a eutectic join. The temperature of the aluminum piece is raised gradually and the oxide layer formed on the surface of the piece is removed. After the first heating stage, the silver piece that is to be attached is transferred to the cleaned surface. The contact point is heated to a temperature where a eutectic bond is generated between the aluminum and silver. During the second heating stage a slight momentary loading is applied to the contact point.

Method for forming a tight-fitting silver surface on an aluminium piece

The invention relates to a method of forming an electrocatalytic surface on an electrode in a simple way, in particular on a lead anode used in the electrolytic recovery of metals. The catalytic coating is formed by a spraying method which does not essentially alter the characteristics of the coating powder during spraying. Transition metal oxides are used as the coating material. After the spray coating the electrode is ready for use without further treatment. The invention also relates to an electrode onto which an electrocatalytic surface is formed.

Method for forming an electrocatalytic surface on an electrode and the electrode

The invention relates to a method for achieving a good contact surface on an aluminium electrode support bar used in electrolysis. In the method the support bar is fabricated as a continuous bar and a highly electroconductive layer is formed on its end. The highly electroconductive layer forms a metallic bond with the support bar and can be achieved for example with thermal spray coating. The invention also relates to an electrode support bar, the end of which is coated with a highly electroconductive material.

Method for the formation of a good contact surface on an aluminium support bar and a support bar

The disclosure relates to a method of obtaining a good current contact on the support bar of a cathode used in electrolysis. In this method a highly electroconductive layer is formed on the contact piece on the end of the support bar of the cathode, especially at the point that comes into contact with the electrolysis cell busbar. The electroconductive layer forms a metallic bond with the contact piece of the support bar. The disclosure also relates to the cathode support bar, wherein a highly electroconductive layer is formed to the contact piece on the end of said bar, in particular the area that touches the electrolysis cell busbar.

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Noormarkku, Finland

Karri Osara