JPS5989792A - Method of continuously electrodepositing metal layer on one side or both sides of strip metal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for successively electrodepositing metal layers on one or both sides of a strip of metal that is moved while being maintained in a non-horizontal direction. The electrolyte flows between the strip metal forming at least one plate-shaped anode and cathode. Such a method can be used to deposit metals such as zinc, tin, brass, etc. on one side of the strip metal. I can do it. This method also allows a deposit to be applied to both sides of the strip metal in one pass, and such a deposit can be developed to have different thicknesses.

BACKGROUND ART AND ITS PROBLEMS In the known methods used for this purpose, the strip metal is usually immersed in an electrolyte and the electrolyte is kept in contact with both sides of the strip metal until this is protected by special precautions. be done. Therefore, even when using specially designed anode arrays and masks, there are significant problems with depositing metal on only one side. It is not possible to prevent electrodeposition of metal in small marginal areas on the back side of the metal strip in a satisfactory manner, and the resulting deposition is undesirably thick near the edges. These drawbacks are completely unavoidable even if the strip knob is brought into contact with the periphery of the roller, where the roller is immersed in the electrolyte and the strip is moved past the anode, causing the electrodeposition to take place. This is what we do. This is because due to the stress gradient caused by the rolling of the strip, the stop often takes on a wavy appearance at its ends, so that the electrolyte remains on the strip even when the strip is in good contact with rollers in other areas. Because of the throwing power of the electrolyte, which is now able to flow around the wavy end behind it, electrodeposition occurs over a larger area behind the strip knob.

OBJECTS OF THE INVENTION The inventive concept differs from conventional methods in that the strip and anode are no longer immersed in electrolyte, but the hydrodynamic contact between the electrolyte on the one hand and the strip knob and the anode on the other hand is caused by an additional electrolyte. The present invention provides a method for continuously electrodepositing a metal layer on one or both sides of a strip metal, which is maintained by continuously supplying a metal layer.

SUMMARY OF THE INVENTION In this invention, a metal layer is continuously electrodeposited on one or both sides of a strip of metal that is moved while being maintained in a non-horizontal direction. The electrolyte flows between strip metal forming at least one plate-shaped anode and cathode. The electrolyte flows freely from the container in the upper region of the anode into the space between the anode and the strip metal and flows downward under its gravity as a sticky mass of fluid.

Example Examples of the present invention will be described below.

According to the invention, the electrolyte flows freely into the upper region of the anode and flows downward under the action of gravity to form a sticky mass of fluid in the space between the anode and the strip metal, and the additional electrolyte flows into the upper region of the anode. Continuously supplied to the space. This action causes the electrolyte to flow downward in an almost free fall, so that the surface of the electrode is heavily bombarded with solution.

According to another feature of the invention, the metal strip is bent at an angle such that a cohesive mass of fluid constituting the electrolyte flowing downwardly is maintained in the space between the anode and the metal strip, and and the distance between the metal strips is 2-20 mm, preferably 10
It becomes mm. For example, if the current density is large, the distance between the strip metal and the anode may be increased slightly at the end away from the current supply terminal, in order to compensate for the small voltage rise along the anode (in the direction from the terminal). It is desirable to make it small.

It has been found that the angle between the strip metal and the vertical line can be up to 30''.

In connection with the method for supplying additional electrolyte to the space between the anode and the strip metal, a preferred embodiment of the method according to the invention provides that a portion of the additional electrolyte supplied to the space between the anode and the strip metal is At the top of the anode, the above-mentioned space may be entered, for example by crossing an overflow weir or from a vessel with slots or similar means, so that the electrolyte flows from there to the collecting vessel up to the anode.

In other embodiments of the invention, at least a portion of the additional electrolyte supplied to the space between the anode and the strip metal is provided through a plurality of holes or slots extending through the anode. enter the space of It will also be understood that the two last mentioned embodiments may be combined.

Certain complications arise when using very high current densities when depositing strips that are moving at high speeds in HD plants. For mechanical and electrochemical reasons,
And in order to dissipate the heat generated by the Joule effect, the rate at which the electrolyte is supplied and the distance between the strip metal and the anode must be relatively increased. As a result, the adhesion of the electrolyte to the metal surface and the influence of the viscosity of the electrolyte are reduced, and the electrolyte falls freely.

This not only sharply increases the rate at which the electrolyte flows through the cell, but also increases the difference in electrolyte flow rate in the upper and lower parts of the cell, resulting in a The cross-sectional area will vary along the anode.

This problem is solved by the present invention, in which the distance between the anode and the strip metal remains constant or decreases in the direction of flow of the electrolyte.

In the present invention, it has been found that it is preferable to provide a distance between the strip metal and the anode that continuously decreases in the direction of flow.

If the distance between the strip metal and the anode decreases downward, the desired configuration from the hydrodynamic concept is expressed by the equation d-
, obtained by rv. tan'ushi, where d is the distance,
S is the downflow path length of the electrolytic solution, and k is a constant.

Further improvements provided by this invention include:
The distance between the anode and the top end of the strip metal and the distance between the anode and the bottom end of the strip metal are adjusted independently of each other.

Another requirement is that the capacity of the plant can be increased even if the floor space is very small, and that this can be achieved without spending too much money.

The anode may increase in length in the direction in which the strip is moved. However, the extent to which it can be increased is limited for various reasons as described below. That is, the anode has a limited current carrying capacity, the terminals that supply current to one point on the anode are very bulky and large, and have a complex configuration to dissipate heat, and the heavy anode present structural problems due to their heavy weight, etc., and very long anodes present additional hydrodynamic problems. On the other hand, the strip is 10-20
It may be moved up and down within a length of m or more. At least two anodes are arranged near the strip metal, one on top of the other, and the electrolyte flowing to the top anode is controlled based on each anode and then free to the next side anode. By flowing to
It has been found that a simple and desirable configuration can be obtained with the present invention.

In the embodiments described above, the electrolyte may be provided on both sides of the strip metal in a known manner for negative side or both side deposition.

It has been found that for configurations with electrodes on both sides of the strip metal, it is most preferable to select polarity, voltage and current independently.

This makes it possible to deposit different thicknesses on both sides of the strip and to connect the cathode electrode to one of the strips. This allows the strip on the non-metalized side to be cleaned or roughened. Such an action has been found to be desirable for further processing of the strip, such as painting, soldering, etc. Finally, the strip may be anodized, for example on the negative side, and coated with metal on the other side by cathodic electrodeposition.

In another embodiment, electrodes are provided on both sides of the metal strip, voltage being applied to only one of the electrodes forming the anode, and electrolyte being applied only to the space between the anode and the strip.

In still other embodiments, the strip metal is coated on one or both sides, and the strip metal is moved adjacent to the continuous anode in alternating directions with respect to the flow direction of the electrolyte, so that the strip metal The metal is moved alternately in the same direction and in the opposite direction relative to the electrolyte. This causes rapid movement of the solution over the surface of the strip, promoting electrodeposition.

In other embodiments, the strip metal is wetted with an electrolyte, preferably sprayed with or otherwise wetted with an electrolyte, to enhance core growth without current flow.

In a special embodiment of the invention, a zinc-nickel alloy is deposited on the strip metal, the direction of movement of the steel is changed once or several times with respect to the direction of flow of the electrolyte, and the electrodeposition is 150A/6m2. Preferably 40-100
carried out electrolytically with a current density of A/6 m2,
This electrolysis is carried out at a temperature of 40-70"C, preferably 45-6"C.
consisting of a suitable solution at a temperature of 0° C., and in this solution at least 80 g/β of each solubility up to
NiSO4,7H20, at least 150g/j!
ZnSO4,7H20 and 2g/j7 H3B
Contains O3.

In this method 4:10 and 10:10 preferably 5:
A nickel-zinc ratio of 10 and 8:10 is maintained in the electrolyte so that the electrodeposited layer contains 8-15 wt, % nickel, preferably 9-13 tvt, % nickel.

In the present invention, when an insoluble anode is used, a method using a sulfuric acid electrolyte containing non-chloride ions that liberate chlorine may be used. It is well known to electrodeposit alternating layers of zinc and nickel or layers with low and high nickel content using a sulfuric acid electrolyte so as to reduce the resistance of the coating to corrosion. For example, US Pat. No. 4,313,802 describes a current density of 5 to 40^/dn1.
A method is disclosed in which strip metal is transferred laterally into a pure sulfuric acid electrolyte containing zinc and nickel in a ratio between 0:15 and 10:40. High nickel conditions result in very high losses of transferred nickel. Also, 0.05~lOg/7! It has been proposed to add an amount of strontium sulfate as a brightener, but this has various disadvantages:
This is because strontium sulfate has extremely low solubility and is relatively expensive.

In the above-described method according to the present invention, the pH value of the solution is adjusted to 1 by adding sulfuric acid intermittently or continuously.
~2. Preferably maintained at 1.3 to 1.8, e.g. copper-
An insoluble anode or electrode consisting of silver and metal oxides is used in a known manner.

It has been found desirable to carry out the extraction of the metal during the melting of the metal hydroxide or metal carbonate, or while the metal or metal alloy itself is being chemically or anodicly melted.

Sulfate, borate, boric acid (HsB(h), aminosulfuric acid (NH2S0J), formic acid (HCOOI(), acetic acid (
CH3CO0H) and glucose and their salts may be added to sulfuric acid and mixed.

The apparatus used in this method consists essentially of at least two deflection rollers arranged one above the other in a manner known per se, and at least two deflection rollers offset from the horizontal and substantially parallel to the strip metal. an insoluble anode of at least one (!I), a terminal for supplying current to the anode and a cathode consisting of a strip metal wound around a roller, drive means for driving the strip, and at least one (!I) insoluble anode for controlling the electrolyte.
Both of them consist of one container, at least one pump that circulates the electrolyte, and a pipeline that supplies the electrolyte to the space between the anode and the strip metal.

In one example of this apparatus, the device for supplying the electrolyte comprises an elongated container, which is provided on top of the anode and is continuously supplied with electrolyte, for example by a pump circulating the electrolyte, and which is connected to the anode and It is provided above the space between the strip metals and has one or more slots, through which the electrolyte is continuously supplied from above into the space between the anode and the strip metals.

In another embodiment, the anode is formed with a plurality of through holes or slots, a container is provided, one wall of which is defined by an open anode wall, and a pipeline is provided from the pump to the container. and works to continuously supply electrolyte to the container.

The devices in the two last mentioned embodiments may also be combined with each other. The means for supplying the electrolyte to the top of the anode may also include a single aperture formed in the anode near the top thereof, and an i < eve connected to the back side of the anode for supplying the electrolyte. good.

Next, the method and apparatus according to the present invention will be explained with reference to the drawings.

In FIG. 1, a strip of metal (1) is continuously pulled in an inclined orientation around deflecting rollers (2) and (3) either upwardly or downwardly past an anode (5). Further, the anode (5) is also inclined. A predetermined voltage or a predetermined current between the anode (5) and the strip metal (1) is maintained by current from the current supply terminals (4) and (6). In order to pass a current and electrodeposit a metal layer on the side of the strip metal (1) facing the anode (5), an electrolyte is pumped from the electrolyte collection container (7) by a pump 1B), Continuously supplied to the container (9) via Nonobu line.

The container (9) has a vertical slot through which the electrolyte flows to the strip metal (1) and the anode (5).
It flows continuously into the space between. The electrolyte fills the space,
Then, it flows downward in that space, and then the collecting container (7)
can be placed in

In Figure 2, the strip metal (1) and the anode (5') have a vertical orientation, the anode (5') consisting of a box with a section (11) into which the electrolyte is supplied by a pump (8). Supplied. The electrolyte rises uniformly to the top position of the box and flows through the anode (5') and the strip metal through the through-slot (12) and drain hole (13) provided in the wall facing the strip metal (1). (1) Flow at different levels in the space between. The electrolyte is returned to the collecting container (7) from that space. FIG. 3 shows an anode (5'), which is closed at the top and has a plurality of holes (14), which are arranged in the anode (5') according to different hydrostatic pressures. At the top, they are larger and closely spaced and at the bottom of the anode (5'), they are smaller and spaced apart. Hole (14)
A wide slot (15) provided above constitutes a drainage outlet.

Adjacent to this path, a single strip is pulled through the plant along a path, in order to make the electrodepositions on both sides of the strip as different as possible in thickness and to design a plant of suitable capacity, as described above. It is desirable to provide a plurality of electrolyte cells, one next to the other or one above the other.

Several embodiments based on this concept are shown in FIGS. 4a-4d and 5a-5d, where the strips and anodes are arranged in a vertical orientation and In FIG. 5, the strip and the anode are arranged in an inclined orientation. The embodiment shown in Figure 4a uses a box-shaped anode. Also, in Figure 4, one side and the same side of the strip is moved twice (upwardly and downwardly) by the same anode box, so that the box has holes or slots in the two mutually opposite walls. and an exhaust port, the effective anode surface area of the box described above can be doubled. According to FIG. 4C, a one-sided anode box may be provided on the other side of the strip, thereby making the plant particularly suitable for depositing metal layers of very different thickness on the two sides of the strip. Obtainable. The plant may be expanded with additional anodes, as shown in Figure 4d.
This allows the same anode surface area to be utilized on each side of the strip. FIG. 4C shows the anodes stacked one above the other. Figure 4 [shows the configuration of the anode hox stored without any gaps, and most of both sides are HD.
It is effectively used within the plant.

The use of slanted electrodes as shown in Figures 5a-5d allows the height of the plant to be reduced. Additionally, hydrostatic and hydrodynamic effects can be exploited in connection with the inclined position.

The configurations shown in FIGS. 5A and 5S are for electrodeposition on the negative side. The configurations shown in FIGS. 5C and 5D may be used for electrodeposition on both sides.

Figure 6 shows a strip metal (11) which is wound around two upper deflection rollers (3) and one lower deflection roller (2). is provided with a current supply terminal (not shown).

Anodes (5) are provided on both sides of the strip metal (1) and each of them is connected to a carrier (5'').

As shown by arrows A and B, the carrier (5'') is adjustably mounted about a horizontal axis (arrow A) and in relation to its distance 111 (arrow B) from the strip metal (1). - In this embodiment shown as an example, the carrier (5”
) are connected to the anode (5), preferably in the middle of the anode (5). It can be seen from the dotted lines indicating the anodes (5) that the distance from each anode (5) to the strip metal (1) and the inclination of each anode (5) with respect to the strip metal (1) can be adjusted as desired. In a preferred embodiment of the invention, the carrier (5”) is electrically conductive;
It is mounted in an insulated manner and includes a current supply terminal (not shown). The anode (5) and deflection roller (2) are provided within the cell case (16). The electrolyte flowing from the anode (5) is controlled at the bottom of the cell and raised by a pump (8) to the top or end of the anode (5) to complete the cycle. As can be seen from FIGS. 6 and 7, the strip metal is plated on only one side. For this purpose, the electrolyte is applied to the strip metal (1).
and the outer anode (5) provided between the cell case (16) and the wall of the cell case (16).

In the embodiment shown in Figures 8 and 9, both sides of the strip metal (1) are plated. For this purpose, an electrolyte is supplied to all anodes (5).

As is clear from FIGS. 7 and 9, in the embodiment shown in FIGS. 8 and 9, the inner anode (5) has a strip metal (1) completely surrounded by the anode. To prevent the electrolyte from flowing out laterally,
A laterally extending end is provided.

In other embodiments of the invention (not shown), anodes are connected to the top and bottom ends of the carrier.

These carriers are individually strip metal +I from each other.
It is adjustable in relation to the distance between J and the anode (5).

At least one of the carriers is mounted in an electrically conductive and insulating manner and is provided with a current supply terminal.

Further, according to the present invention, the surface of each anode (5) that is the strip metal (1) is flat or curved in a convex manner with respect to the direction of the strip metal.

Its curvature can be determined by the formula d = 7 rv , where d is the strip metal (1) and the anode (5
), S is the downflow path length of the electrolytic solution, and k is a constant.

In the embodiment of the invention shown in FIG. 10, two anodes (5) are provided, one above the other. It will be appreciated that more than one anode may be provided, one on top of the other. The electrolyte flows freely from the slot in the supply line (18) to the upper anode (5) and out of this to the collecting tank (19). When this collecting tank (19) is filled with electrolyte, this electrolyte overflows from the edge of the collecting tank (19) and flows out, controlled by a redirecting bucket (QO), and continuously flows to the lower anode ( 5) and flows freely into it. The electrolyte flowing out from the lower anode (5) is controlled by a collection container (7) provided with a drainage channel (22). The electrolyte that has left the collection container (7) is transferred to the supply line (not shown) by a pump.
18). The electrolyte remaining on the strip metal (1) is squeezed out by the squeezing roller (23).
, and they do not flow out into the collecting container (7).

To improve the power distribution, a plurality of additional rollers (24) are provided for the current supply. Each of these rollers (24) is provided between two adjacent anodes (5).

In the embodiment shown in FIG. 11, the electrolyte removed from the upper anode (5) is deflected by a redirecting tub (10') into a collecting tank (19'), in which the electrolyte is transferred to a collecting tank (19'). 19') and flows into the space between the anode (5) and the strip metal (1) below.

The embodiment shown in FIG. 12 shows a configuration for controlling and changing the direction of the electrolyte. This configuration has a narrow collecting funnel (25) whose large opening (26) receives the electrolyte of the upper anode (5), and from whose small opening (27) the electrolyte passes through the vibrator to the lower side. flows to the anode (5). The gathering funnel (25) is the first
As shown in Fig. 3, it has a guide fabric (28) and a hasoflu fabric (29). These fabrics direct the electrolyte toward the small openings and slow the flow.

The modified collecting funnel (25') shown in FIG. 14 has a circular shape and has a guide fabric (28') and a funnel fabric (29').

In the practical embodiment of the invention shown in FIGS. 15-17, the pump (8) is structurally integrated with the cell case (16). Since these parts are the same as those shown in FIG. 6, they are designated by the same reference numerals here. As in the example shown in FIG. 6, two upper deflection rollers (3) and one lower deflection roller (2) are provided. The anode (5) is bright and the upper deflection roller (
3) and the lower deflection roller (2). The anode (5) on either side of the strip metal (1) and the lower deflection roller (2) are surrounded by a cell case (16) open at the top, at the bottom of which the electrolyte is controlled. The electrolyte is supplied to the anode (
5) is continuously pumped up. A pump (8) is provided on the side of the cell case αω, at the level of the bottom of the case. The side walls of the case (16) are double-walled, thereby defining a lateral passage (20). The bottom of the cell case (16) is connected by a line to a station (not shown) for melting the electrolyte.

ADVANTAGES OF THE INVENTION The method according to the invention and the device for carrying out the method provide numerous benefits. That is, for example, if the strip metal is wet, even if the electrolyte has a high acidity, the full? This can be prevented by deactivating the i-car.

Thereby, even if the strip metal is stopped for a long time, etching of the strip metal and its influence on the ground can be prevented.

Furthermore, the distance between the strip metal and the anode may be extremely small, in most cases considerably less than the stated limit of 20 mm. This is because the rapid fall of the electrolyte due to the action of gravity causes the flow of the electrolyte to be rapid at the boundary layer, and the boundary layer is always thin and only a very low concentration of polarization is generated at the electrode. It is. The heat generated in case of high current density is rapidly dissipated and any gas that can be formed and reduced is I!
1lXIt! and the wet electrode surface is immediately removed. For this reason, the terminal voltage and power may be low, so that the power losses due to overheating of the solution due to the Joule effect are extremely low, yet the highest possible power density is very high. This allows a particularly economical and compact design. The strip metal can exhibit the important advantage that it is wetted by the electrolyte only on its advancing side, so that even small electrodepositions on the rear side of the strip metal are prevented. The fluid mass filling the space between the electrodes is rapidly compressed and torn apart by dynamic action at the ends of the strip, so that in effect the increase in current density at the ends of the strip is appreciably large. As a result, masks are not required. For this reason, if the anode is wide enough, it can be easily used even if the strips are warped, ie deflected laterally as they pass through the cell.

If it is necessary to melt the metal with an electrolyte and maintain the concentration of metal ions, this can be achieved by chemical or anodic melting cells, which are known per se.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 respectively show two of the apparatuses applied to this invention.
FIG. 3 is a perspective view showing details of the device, FIGS. 4a to 4f and 5a to 5d.
11lIII a plurality of electrolyte cells according to the present invention.
FIG. 6 is a schematic cross-sectional view of an apparatus according to the invention for plating an example of strip metal; 7 is a plan view of the apparatus of FIG. 6; FIG. 8 is a cross-sectional view of the apparatus of FIG. 6 used for plating both sides of strip metal; and FIG.
The figure is a plan view showing the device in Figure 8, and Figure 10 is a 2 (+l
11 and 12 are cross-sectional views showing an apparatus according to the invention for coating both sides of strip metal in an apparatus in which the +1 anodes are arranged one above the other. FIG. 13 is a cross-sectional view taken along the line xm-xm in FIG. 12, and FIG. 15 is a sectional view similar to that shown in the figure, but showing an example of different collection and direction changing means; FIG. 15 is a cross-sectional view showing a further embodiment of the device according to the invention; FIG. Line XVI in
- A cross-sectional view showing the case of cutting at XVI, Figure 17 is the 1st
FIG. 5 is a sectional view taken along line X--X in FIG. 5; (1) is a strip metal, (21, +31 is a deflection roller, (4,), (61 is a current supply terminal, (5) is an anode, (7) is an electrolyte collection container, (8) is a pump, (9
) is the container, (12) is the slot, (13) is the drain port, (
14) is a hole, and (15) is a wide slot. FIG, 5a FIG, 5bFI
G, 5c FIG, 5dFig,
6 5 Fig, 8 5 Ko~・72 Fig, )3 FjQ, 14 Fig, 17

Claims (1)

[Claims] 1. A method for continuously electrodepositing a metal layer on at least one side of a metal strip that is moved while being maintained in a non-horizontal direction, the method comprising: at least one plate-shaped anode and cathode; An electrolytic solution is flowed between the strip metals, an electrode is loosely fitted adjacent to the upper part of the anode, and gravity is applied so that the electrolyte forms a solid mass of fluid in the space between the anode and the strip metals. A method in which a metal layer is continuously electrodeposited on one or both sides of a strip metal by continuously supplying an additional electrolyte into the space by flowing the electrolyte downwardly by . 2. The angle between the strip metal and the vertical line is up to 30
゛, and the distance between the anode and the strip metal is 2
A method of continuously electrodepositing a metal layer according to claim 1 having a thickness of ˜20 mm on one or both sides of a strip metal. 3. A method of continuously electrodepositing the metal layer of claim 1 on one or both sides of the strip metal without increasing the distance between the anode and the strip metal in the direction of flow of the electrolyte. 4. The distance between the strip metal and the anode is the formula d=
The metal layer according to claim 3, which decreases in the downward direction according to /rr (d = distance between the strip metal and the anode, S is the downflow path length of the electrolytic solution, and k is a constant), is formed of a strip metal. A method of continuous electrodeposition on one or both sides. 5. The metal layer according to claim 1, wherein a plurality of electrodes are provided on both sides of the strip metal, and the voltage supplied to the electrodes and the polarity thereof are individually selected. A method of electrodeposition continuously on one or both sides. 6. To electrodeposit the zinc-nickel alloy on the steel strip, the relationship of the moving direction of the steel strip with respect to the flowing direction of the electrolyte is reversed at least once, and the electrodeposition is carried out by the electrolyte at a current density of 20 to 150 A/di2. The electrolyte consists of a suitable solution at 40-70 °C, and in said solution up to their respective solubility at a concentration of at least Bog/l! Ni504. 78
20, 150g/it Zn5Q+,
A method for successively electrodepositing a metal layer according to claim 1 containing 1 khO and 2 g/β H3BO3 on one or both sides of a strip metal. ? , a nickel-zinc ratio of between 4:10 and 10:10 is maintained in said electrolyte to deposit a layer comprising 8-15 wt.% nickel, preferably 9-13 wt.% nickel. A method of continuously electrodepositing a metal layer according to claim 1 on one or both sides of a strip metal. 8. A method of continuously electrodepositing a metal layer on one or both sides of a strip metal according to claim 1, wherein a pu value of 1 to 2 is maintained by adding a small amount of sulfuric acid in a bath. . 9. The method according to claim 1, characterized in that at least a part of the additional electrolyte supplied to the space between the anode and the strip metal is inserted into said space through an aperture extending through the anode. A method of continuously electrodepositing a metal layer on one or both sides of a strip of metal. 10. Claim in which at least two stacked anodes are provided adjacent to the strip metal, the electrolyte entering the upper anode being controlled based on said anode and flowing freely into the next lower anode. A method of continuously electrodepositing a metal layer according to item 1 on one or both sides of a strip metal. 11. At least a portion of the lower reflective mouth and the electrode,
Claim 1, characterized in that the cell is provided in a cell that is open at the top, from which a pump draws up the electrolyte and directs it to the anode through a passageway located outside the cell casing.
A method of continuously electrodepositing a metal layer as described in Section 1 on one or both sides of a strip metal.