SU831877A1 - Device for precipitating compositional electrolytic platings - Google Patents

Description

The invention relates to electrochemistry, in particular to devices for the deposition of composite electrolytic coatings.

The closest to the proposed · technical essence and the achieved result is a device for the deposition of composite electrolytic coatings containing a bath with an anode and a cathode, the device is equipped with an additional bottom located with a gap relative to the side walls of the bath, and the bubbler tube is placed in the space between the main and additional bottom and is shifted from the center to the anode [1].

However, pneumatic mixing (hydrodynamics) of the electrolyte used in electrolytic baths leads to increased evaporation of the electrolyte, i.e. increased consumption of components, the ingress of oxygen into the deposition zone affects the quality of the coating, as a source of metal oxidation appears. In addition, heavier particles that precipitate and do not participate in the electrolyte do not mix well. The air passing through the electrolyte does not come in contact with the adjacent layers of liquid and does not carry it along with it. Pneumatic mixing also contributes to intensive foaming, the accumulation of fine fractions of components in the foam that are not involved in the coating process, and the presence of copious foam requires sealing the bath. The purpose of the invention is to improve the quality of coatings by eliminating foaming.

This goal is achieved by the fact that the device is equipped with a ring intake element, the bottom of the bathtub is made in the form of a set of semi-cylindrical profiles, and the mixing mechanism is made in the form of perforated tubes installed with the possibility of axial movement and connected by means of an oil seal with the ring intake element, while perforation is made in one row of the lower part of the tubes.

In addition, the device is equipped with a tube swing mechanism connected by a two-shouldered lever with a stirring mechanism.

Figure 1 shows a device, a section; in Fig.2 - section AA in Fig.1; in Fig.Z - section F-B in Fig.2 ;, in Fig.4; - view B in Fig.1.

The device comprises a bath 1, the bottom 2 of which is made in the form of a set of half cylinders, perforated movable tubes 3 connected through a movable stuffing box with a pressure system, and an annular intake device 4.

Mixing of the electrolyte in the bath is carried out by the pump 5. In the bath. placed anodes 6 and cathode'7.

‘The part is installed on the cathode table 8 having a tube swing mechanism 9. The cathode table 8, through the’ lever system 10, is connected to a set of perforated lifting tubes 3 of the electrolyte mixing mechanism 11.

The device operates as follows.

In the process, the electrolyte flow coming out from the nozzles under pressure comes in contact with the bottom 2 of a special profile, rotates 180 ° and rises, taking away solid particles of the components. The tubes 3 of the mixing mechanism 11 have a reciprocating movement along the bottom 2 of the bath-1, which contributes to the complete washing off of solid particles from the bottom 2 and the upper surface of the tubes 3. The ring suction 4 located in the upper part of the bath promotes upward stable flow of electrolyte with suspended solids of components and eliminates pricing. 35

Thanks to the use of this device for the deposition of composite electrolytic coatings, the quality of the latter increases.

Claims (3)

(54) DEVICE FOR DEPOSITING COMPOSITION ELECTROLYTIC COATINGS OF FIG. 1; on fig.Z - section F-B on fig. figure 4- is a view In figure 1. The device comprises a bath 1, the bottom 2 of which is made in the form of a set of semi-cylinders / perforated moving tubes 3 connected via a movable gland to a pressure system, and an annular intake device 4. The electrolyte is stirred in the bath by pump 5. In the bath. placed anodes 6 and cathode. The part is mounted on a table 8 having a mechanism for swinging the tubes 9. The cathode table 8, through a 15-lane system 10, is associated with a set of perforated moving tubes 3 of the electrolyte mixing mechanism 11. The device works as follows. In the course of operation, the electrolyte flow, coming out of the nozzles under pressure, hits the bottom 2 of the special profile, rotates 180 and rises upwards, carrying the solid particles of the components with them. The tubes 3 of the stirring mechanism 11 have a reciprocating movement along the bottom 2 of the bath-1, which contributes to the complete washout of solid particles from the bottom 2 and the upper surface of the tubes themselves 3. The ring suction 4, located in the upper part of the bath, contributes upward stable electrolyte flow with suspended solid particles of the components and eliminates foaming. Due to the use of this device for the deposition of composite electrolytic coatings, the quality of the latter is affected. Claim 1. A device for deposition of composite electrolytic coatings, containing a bath with electrodes, and a mixing mechanism, which is so that, in order to improve the quality of coatings by eliminating conversion, it is equipped with an annular intake element the bath is made in the form of a set of semi-cylindrical profiles, and the mixing mechanism is made in the form of perforated tubes installed with the possibility of axial movement and connected by means of an omentum to the annular intake element . . 2. A device according to claim 1, wherein the perforations are made in one row along the bottom of the tubes. 3 .. The device in PP. 1 and 2, which is equipped with a tube swing mechanism connected by a double-arm lever with a mixing mechanism. Sources of information taken into account in the examination 1. USSR author's certificate №550465, cl. C 25 D 17/02, 1975. C and .- r1 1