RU2167960C1 - Gear for electrochemical deposition of coats - Google Patents

Abstract

FIELD: manufacture of copper-and-graphite D C sources. SUBSTANCE: graphite in the form of graphite pads oriented perpendicular to core is precipitated on copper core placed into vitreous silica glass bath from colloid-graphite solution based on ethyl alcohol. Proposed gear has perforated tube following configuration of electrode on which coat is deposited and mounted with clearance with regard to it. Tube is made of graphite and has holes of 0.3 and 2.0 mm in diameter with ratio 1:1 of summary area of holes of smaller diameter to summary area of holes of bigger diameter. EFFECT: formation of graphite jacket from graphite plates oriented spatially while manufacturing copper- and-graphite D C sources. 1 dwg

Description

 The invention relates to electrochemical production, in particular to devices for electrochemical coating of metal, and can be used for the manufacture of copper-graphite direct current sources.

 All devices — electrolytic baths — contain anodes and cathodes (Brief Chemical Encyclopedia, 1967, vol. V, pp. 930-940). Use them for coating, which are formed with a certain uniformity and density.

 The closest analogue of the claimed invention is a device for electrolytic coating containing a bath, electrodes - a cathode and anode and a thin-walled perforated tube, repeating the configuration of the electrode on which the coating is applied and installed with a gap to it (WO 86/02671, IPC 7 C 25 D 17/10, publ. 05/09/1986).

 Their disadvantage is that the applied particles are not oriented in space along the axis of the positive pole - the negative pole. The graphite shell deposited on a copper core without the orientation of the graphite plates does not have the quality of the formation of the potential difference.

 The objective of the invention is the deposition of a graphite coating on a copper core so that the graphite plates are adjacent to the copper core in a directional, narrow side surface to achieve covalent bonding between graphite and copper.

 The objective is achieved in that the device for electrochemical coating containing a bath, electrodes - a cathode and anode and a thin-walled perforated tube, repeating the configuration of the electrode on which the coating is applied, and installed with a gap to it, according to the invention is equipped with a support frame consisting of an upper disk , the lower disk and four racks, the bathtub and the supporting frame are made of quartz glass, the cathode is in the form of a hemisphere made of graphite and mounted on the bottom of the bathtub with fluoroplastic sealing nuts, and as the electrode to be coated, an anode is used, the perforated tube is mounted on a fluoroplastic sleeve and cracker, made of graphite and with holes with a diameter of 0.3 mm and 2.0 mm, while the ratio of the total area of the hole of a smaller diameter and the total area of the holes of a larger diameter is 1: 1. At the same time, a copper core is used as the anode.

 The drawing shows a General view of the device for electrochemical coating with the designation of the level of colloidal graphite solution.

 For applying spatially oriented graphite plates to a copper core - anode, an electrolyzer is used, consisting of a bath 1 filled with a colloidal graphite solution (solvent - ethyl alcohol), an electrode 2 (cathode), a thin-walled perforated tube 3 mounted on a copper core 4 ( anode) and a supporting frame including a top 5 drive, a lower 6 drive and four racks 7.

 The bath is a vessel made of quartz glass. A hole was made in the bottom of the vessel for mounting the electrode 2, in which the stranded copper wire 8 was mounted at the bottom end of the vessel. The electrode 2 is attached to the bottom of the bath 1 by means of two fluoroplastic nuts 9 and is made of graphite in the form of a hemisphere, which is necessary to obtain a uniform distribution of power lines in the electric the field between the electrode 2 (cathode) and the copper core 4 (anode), which is fixed in the frame by the upper part by means of a centering washer 10 on the upper disk 5, and the lower part by supporting the fluoroplastic th biscuit 11 - against the centering cone 12 of the lower disc 6. All frame members and centering washer 10 is made of quartz glass. A thin-walled perforated graphite tube 3 is fixed to the copper core 4 (anode) using a fluoroplastic sleeve 13 and a fluoroplastic cracker 11, the cross-sectional configuration of which repeats the cross-sectional configuration of the copper core 4 and is installed with a gap to it. Perforation consists of holes with a diameter of 0.3 mm and holes with a diameter of 2 mm with a ratio of the total area of holes of a smaller diameter to the total area of holes of a larger diameter as 1: 1, while holes with a diameter of 2 mm are designed for circulation of a colloidal graphite solution, and holes with a diameter of 0 , 3 millimeters - for proper orientation during the deposition of graphite plates from a colloidal graphite solution and to ensure covalent bonding between graphite and copper. The length of the thin-walled perforated tube 3 is determined by the specified length of the graphite shell of the manufactured direct current copper-graphite source and, in turn, determines the level of the colloidal graphite solution in the bath 1, the gap between the thin-walled perforated tube 3 and the copper core 4 depends on the layer of deposited graphite.

 Bath 1 and all frame details - pos. 5, 6, 7 are made of quartz glass to prevent distortion under the influence of external influences directed strictly perpendicular to the anode - the copper core of 4 power lines created in the bath 1 of the electric field.

 The lines of force of the electric field orient and direct the graphite plates of the colloidal graphite solution perpendicular to the surface of the anode — the copper core 4. The nuts 9, sleeve 13, and cracker 11 are made of fluoroplastic — as a chemically inert material to the colloidal graphite solution.

 The device operates as follows. A bath 1 is filled with a colloidal graphite solution, and the filling level is set at the upper end of the thin-walled perforated tube 3. A constant voltage of up to 1000 V is applied to the anode — copper core 4 and cathode — graphite electrode 2, while negatively charged graphite plates of the colloidal graphite solution, passing through a thin-walled perforated tube in an electric field, they are spatially oriented perpendicular to the surface of the anode - copper core 4 and are uniformly deposited on it.

 Thus, the graphite shell deposited on the copper core 4 thus contributes to the formation of a potential difference between the copper core and the graphite shell and is the anode of a copper-graphite direct current source.

Claims (2)

 1. Device for electrochemical coating, containing a bath, electrodes - a cathode and anode and a thin-walled perforated tube, repeating the configuration of the electrode on which the coating is applied, and installed with a gap to it, characterized in that it is equipped with a support frame consisting of an upper and of the lower disks and four racks, the bathtub and the supporting frame are made of quartz glass, the hemispherical cathode is made of graphite and fixed to the bathtub bottom with fluoroplastic sealing nuts, and as an electrode on which FNF coating is used the anode, the perforated pipe is mounted on the PTFE sleeve and biscuits made of graphite with holes 0.3 mm in diameter and 2.0 mm, wherein the ratio of the total area of the smaller diameter holes and the total opening area of larger diameter is 1: 1.  2. The method according to claim 1, characterized in that a copper core is used as the anode.