CS262899B1 - A method of manufacturing a meter, a probe for measuring current density in an electrolyzer - Google Patents

Abstract

This is a measuring probe for measuring the current density of an object intended for galvanic plating. The probe enables reliable measurement because the current field is not deformed. The production method consists in providing the surface of the model of the plated object with a solid weak conductive layer, in which closed non-conductive channels are created at selected locations by a mechanical or photochemical method. The lead wires of the measuring apparatus are connected to the measuring surface closed by these channels.

Description

SUMMARY OF THE INVENTION The present invention provides a method for manufacturing a probe for measuring current density on a surface of an electroplating article, particularly useful for optimum adjustment of elements affecting current density distribution in an electrolyser;

To measure the amount of current entering the surface of an object from an electrolyte, it is necessary to create a defined conductive surface on the surface of the object, electrically separated from the other conductive surface. This is usually done by gluing an electrically conductive plate provided with an insulating layer to the surface of the object, wherein an insulated current measuring conductor is attached to the conductive plate. A disadvantage of this arrangement is the fact that the measuring electrodes protrude above the surface of the object and thereby distort the current field, which distorts the measurement result. Reliable provision of the surface of the object with the measuring pads requires a special adhesive of properties that would resist the electrolyte environment in which the measurement is performed. Since the measuring electrodes must follow the surface of the object, their manufacture and mounting are laborious.

These disadvantages are overcome by the method of manufacturing a current density measuring probe in an electrolyser, which comprises providing the surface of the object to be coated with a solid weak conductive layer in which closed non-conducting channels are formed at selected locations. The measuring conductors are connected to the measuring surface enclosed by these channels. Non-conductive channels are created either by mechanical or photochemical methods, or even when the model surface is provided with a conductive layer.

The advantage of this method is that the electrically insulated measuring surfaces enclosed by non-conducting channels closely follow the surface of the object and do not protrude above it, so that the current field is not deformed. The non-conducting channels can be formed very narrow, which again means a large approximation to the actual current field distribution without the measuring electrodes. The shape of the measuring surfaces enclosed by the non-conducting channels can be ensured very precisely, thus creating a precisely defined size of the measuring surfaces. This is important for calculating the current density from the total current across the measuring surface. A novel effect of the invention is that the non-conductive object is provided

262 899 with a conductive layer, in which precisely defined measuring surfaces are then enclosed by non-conducting channels. These measuring surfaces are then provided with supply conductors.

Example

The non-conductive cover model is degreased with ethyl alcohol, the degreased surface is sprayed with an aqueous solution of stannous chloride to increase adhesion. An aqueous silver nitrate solution is then applied to the model with a pressure gun. A copper layer with a thickness of 0.1 mm is galvanically applied to the model surface.

At the required measuring points, a groove is cut through the entire thickness of the conductive copper layer to the non-conductive surface of the model by means of a drilling knife clamped in the drill. The lead wires to the measuring apparatus are connected to the resulting pads - 24 in this case.

Claims (3)

Method for producing a probe for measuring current density in an electrolyser, characterized in that the surface of the model of the object to be coated is provided with a solid weak conductive layer in which closed non-conducting channels are formed at selected locations. measuring apparatus. 2. Method according to claim 1, characterized in that the non-conductive channels are formed in a mechanical manner. 3. The method according to claim 1, wherein the non-conducting channels are formed by a photochemical route.