JP3244259B2 - Electrode for plating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a plating electrode.

[0002]

2. Description of the Related Art Conventionally, for example, Zn
In a line where a metal such as iron or Cr is continuously plated, the surface of an iron-based electrode substrate is made of insoluble Pb or Pb.
An electrode having a structure in which a discharge surface is formed by covering with an alloy layer (hereinafter, referred to as a Pb-based metal layer) is used. Since the Pb-based metal is inexpensive, has excellent plating performance, and has good corrosion resistance, covering the entire surface of the iron-based electrode substrate with the Pb-based metal also has the advantage that the surface of the electrode substrate can be protected from corrosion by the plating solution. . However, recently, from the viewpoint of environmental conservation,
There is a growing demand for electrodes that do not use Pb as much as possible. For example, Pt is deposited on the surface of a thin film-forming metal such as Ti.
An insoluble electrode coated with a conductive active material containing a group metal or an oxide thereof (IrO ₂ as a representative example) has been used.

Meanwhile, the electrodes used in a continuous plating line for steel sheet or the like, generally although effective electrode area of the per sheet is used. For very large as 1 to 3 m ^2, conductive, such as IrO ₂ Since the active material layer is formed by repeating the process of applying and firing a solution containing the metal compound many times, it is difficult to form a large-area active material layer at a time. Therefore, usually, a method is used in which a required number of discharge members each having a conductive active material layer formed on a relatively small-area Ti plate are manufactured and fixed on a large-area electrode base by screwing or the like. ing. In this case, the electrode base is made of Ti as a whole so that corrosion does not occur even if a plating solution permeates from a screwed portion or the like.

[0004]

The electrode having the above-mentioned structure has a disadvantage that the material cost of the electrode is high since the entire electrode base is made of expensive Ti. In many steel plate plating lines, recently, it has been considered to replace the Pb-based electrode with an electrode using the above-mentioned Pt group metal or its oxide. However, in the case of the above-described electrode using a Ti-based electrode base, Since the iron-based substrate of the conventional Pb-based electrode cannot be diverted, the Pb-based electrode used so far must be completely discarded and the Ti-based electrode must be newly installed. There is also a problem that requires enormous capital investment.

An object of the present invention is to provide a conductive active material coating layer having a P
An object of the present invention is to reduce the cost of an electrode material for a plating electrode mainly composed of a t- group metal or an oxide thereof, by forming the electrode substrate from an iron-based material.

[0006]

In order to solve the above-mentioned problems, a plating electrode according to the present invention has the following features. Electrode substrate: made of iron or iron alloy. Conduction receiving member: made of a corrosion-resistant metal made of Ti or a Ti alloy , and disposed in contact with the electrode substrate on the side facing the member to be plated. First fastening means: fastening the conduction receiving member to the electrode base. Corrosion-resistant metal coating layer: made of Ti or Ti alloy , covers at least the surface of the electrode substrate facing the member to be plated, except for the portion where the conduction receiving member is arranged. Discharge member: The discharge member is made of a corrosion-resistant metal made of Ti or a Ti alloy, and is disposed so as to cover the side of the electrode substrate facing the member to be plated from above the corrosion-resistant metal layer and to be in contact with the conduction receiving member. The surface on the side without Pt
It is covered with a conductive active material coating layer mainly composed of a group metal or its oxide. Second fastening means: The discharge member and the conduction receiving member fastened to the electrode base are fastened to each other. Then, electricity is supplied to the discharge member via the electrode base and the conduction receiving member.

According to the above configuration, since the electrode base is made of iron or an iron alloy, the material cost of the electrode can be reduced. A conduction receiving member made of a corrosion-resistant metal is fixed to the electrode substrate, a discharge member is fastened to the conduction receiving member, and the surface of the electrode substrate except for a portion where the conduction receiving member is disposed is covered with a corrosion-resistant metal coating. Since it is covered with the layer, there is no fear that the electrode substrate is corroded by contact with the plating solution. Further, in the case of converting from the existing conventional electrode covering the surface of the iron-based electrode base to the electrode of the present invention by the conductive active material layer composed of Pb or Pb alloy, the above-mentioned Pb or Pb alloy is used. If the conductive active material layer is removed, there is also an advantage that the remaining iron-based electrode substrate can be used as it is for the electrode of the present invention.

[0008] In this case, it is possible to form a sealing welded portion for connecting the outer edge portion of the conduction receiving member and the corresponding edge portion of the corrosion-resistant metal coating layer to each other and for sealing the gap therebetween. This prevents the plating solution from penetrating from the space between the conduction receiving member and the corrosion-resistant metal coating layer to the electrode substrate side, thereby preventing the electrode substrate from being corroded.

[0009] conductive receiving corrosion resistant metal of the members and corrosion resistant metal coating layer is made of Ti or Ti alloy. Also,
The conductive active material coating layer can be mainly composed of, for example, IrO ₂ .

Next, between the conduction receiving member and the electrode base,
The contact surface can be formed along a direction intersecting the direction of fastening by the first fastening means. According to this, since the conduction receiving member and the electrode base form a strong surface contact state on the contact surface based on the fastening by the first fastening means, a good conduction state is formed between the two at the time of energization. Is done. On the other hand, a contact surface may be formed between the conduction receiving member and the discharge member along a direction intersecting with the fastening direction by the second fastening means. Thereby, the conduction state between the conduction receiving member and the discharge member can also be favorably maintained.

[0011] The first fastening means may include a screw member which is screwed into the electrode base through the conduction receiving member. Thereby, the fastening structure between the conduction receiving member and the electrode base can be simplified. In this case, Ti or Ti alloy
It is made of gold and covers the head side of the screw member,
A corrosion-resistant covering portion for sealing a gap between the screw member and the conduction receiving member can be provided. This prevents the plating solution or the like from permeating into the electrode base through the gaps in the screw holes.

Further, the second fastening means may include a screw member which is screwed into the conduction receiving member through the discharge member. As a result, the fastening structure between the discharge member and the conduction receiving member can be simplified, and since the screw member is screwed into the conduction receiving member made of a corrosion-resistant metal, the plating solution is filled in the gaps of the screw holes and the like. There is no fear of corrosion even if it penetrates. In this case, the screw member is also made of Ti or Ti
It can be composed of a corrosion resistant metal such as an alloy.

Next, on the side of the electrode substrate facing the member to be plated, a recessed or hole-shaped receiving member mounting portion which is open on the surface of the electrode substrate can be formed, and the conduction receiving member is at least partially formed therein. Can be configured to be fastened to the electrode base by the first fastening means in a state of having entered the receiving member mounting portion. For example, when the first fastening means is formed by a screw member that is screwed into the conduction receiving member through the discharge member, according to the above-described configuration, the formation of the receiving member mounting portion allows conduction of the screw member in the screwing direction. The thickness of the receiving member can be increased. Thereby, the screwing length of the screw member to the conduction receiving member can be lengthened, and the discharge member and the conduction receiving member can be more firmly fastened.

Here, in the above configuration, the first fastening means comprises: a female screw portion formed on the inner peripheral surface of the receiving member mounting portion;
It can be formed by a male screw part formed on the conduction receiving member side and screwing with the female screw part. This allows
The electrode base and the conduction receiving member can be firmly fastened by direct screwing, and the number of components can be reduced since there is no need to provide a separate screw member or the like.

Further, the conduction receiving member may have a projection projecting from the surface of the electrode base toward the discharge member, and the conduction reception member may be configured to contact the discharge member at an end face of the projection. it can. On the other hand, on the side of the discharge member facing the electrode base, a projection is formed which protrudes from the surface of the discharge member toward the conduction receiving member at a position corresponding to the conduction receiving member. It can also be configured to be in contact with the member. In any configuration, the fastening force by the second fastening means can be concentrated on the end face of the protruding portion, so that the contact between the conduction receiving member and the discharge member can be ensured.

The electrode base can be formed in a plate shape, and the discharge member can be formed in a plate shape following the plate surface of the electrode base. Note that the discharge member may be divided into a plurality of small plate-shaped portions, and may be individually coupled to the electrode base via the conduction receiving member.

The above-mentioned plating electrode can be more specifically configured as follows. In other words, a concave receiving member mounting portion is formed on the electrode base, and the conduction receiving member forms a contact surface between the conductive member and the bottom surface of the receiving member mounting portion. Then, a first screw member as first fastening means penetrating the conduction receiving member is screwed into the electrode base on the bottom surface of the receiving member mounting portion, and the conductive member and the electrode base are fastened. The discharge member and the conduction receiving member (and eventually the electrode base) are fastened by a second screw member that passes through the discharge member and is screwed into the conduction receiving member fastened to the electrode base. Thus, the electrode base and the conduction receiving member can be reliably and firmly contacted on the contact surface, and a good conduction state can be formed between the two.

In this case, the electrode base can be formed with a bottomed or penetrating hole that opens in the bottom surface of the receiving member mounting portion and extends in the depth direction of the receiving member mounting portion. The conduction receiving member corresponding to the portion can be formed with a convex portion that enters into the hole when the conductive receiving member is mounted in the receiving member mounting portion. Then, the second screw member is positioned at a position corresponding to the convex portion, from the side opposite to the convex portion, such that the tip of the second screw member enters the convex portion side from the bottom surface of the receiving member mounting portion. Can be screwed in. By forming the convex portion on the conduction receiving member,
The length of screwing of the second screw member to the conduction receiving member can be increased, and a more secure fastening state is achieved.

Here, the electrode base is formed in a plate shape, the receiving member mounting portion is formed in a groove shape along the plate surface of the electrode base, and the conduction receiving member is fitted into the groove-shaped receiving member mounting portion. It can be formed in a horizontally long plate shape to be combined. As a result, the contact area between the receiving member mounting portion and the conduction receiving member is increased, and poor contact and the like are less likely to occur. In this case, a plurality of the above-mentioned convex portions may be formed in the conduction receiving member along the longitudinal direction, and a plurality of the above-mentioned holes may be formed in the receiving member mounting portion corresponding to each of the convex portions. In addition, a plurality of first screw members can be provided at predetermined intervals in a direction along the longitudinal direction of the conduction receiving member at positions not interfering with the protrusions.

As another configuration different from the above, a concave or hole-shaped receiving member mounting portion having a female screw portion formed on the inner peripheral surface is formed on the electrode base, and the conduction receiving member is formed of a cylindrical main body. By screwing the male screw portion formed on the outer peripheral surface to the female screw portion of the receiving member mounting portion, the male screw portion can be fixed to the electrode base. In this case, at the end of the main body portion of the conduction receiving member on the opening side of the receiving member mounting portion, a flange portion extending outward in the circumferential direction is formed, and in a state where the conduction receiving member is fixed to the electrode base, The lower surface of the flange portion may be configured to make surface contact with the peripheral edge of the opening of the receiving member mounting portion. Thereby, in addition to the direct screwing between the conduction receiving member and the receiving member mounting portion, the surface receiving contact between the flange portion and the opening peripheral portion of the receiving member mounting portion allows the conduction receiving member and the electrode base to be in contact with each other. And a good conduction state can be formed between them. A counterbore portion is formed on the periphery of the opening of the receiving member mounting portion, and in a state where the conduction receiving member is fixed to the electrode base, the flange portion is accommodated in the counterbore portion, and a lower surface of the flange portion is provided. Is formed so that the flange portion does not protrude from the surface of the electrode substrate, the discharge member can be brought closer to the electrode substrate side, and the thickness of the entire electrode can be reduced. Can be.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to some embodiments shown in the drawings. First Embodiment FIGS. 1 to 3 show a plan view, a front view, and a bottom view, respectively, of a plating electrode (hereinafter, simply referred to as an electrode) 1 according to a first embodiment of the present invention. That is, the electrode 1 is for continuously plating both sides or one side of a steel plate strip as a member to be plated continuously conveyed in the longitudinal direction, such as zinc plating, and is formed into a plate shape by carbon steel or the like. The formed electrode base 2, a discharge member 3 made of Ti or a Ti alloy and arranged to cover one plate surface of the electrode base 2, also made of Ti or a Ti alloy, and the electrode base 2 and the discharge member 3, a plate-shaped conduction receiving member 4, which is formed of carbon steel or the like, and which penetrates the conduction receiving member 4 in the thickness direction and is screwed into the electrode base 2 to fasten them together. (First fastening means) 5, which is formed of Ti or a Ti alloy, is secondly fastened to each other by penetrating the discharge member 3 in the thickness direction and screwing it into the conduction receiving member 4. The second member (second fastening means) 6 is made of Cu or a Cu alloy, and protrudes from the plate surface of the electrode base 2 on the opposite side (hereinafter referred to as the back side) where the discharge member 3 is disposed. The power supply unit 7 and the like provided integrally therewith are configured.

As shown in FIG. 1, the electrode base 2 is formed, for example, in a rectangular shape, while the power supply section 7 is formed as shown in FIG.
Is formed in a plate shape, and is fixed to the back surface of the electrode substrate 2 at one end by a welded portion 10. Further, as shown in FIG. 3, the discharge member 3 is divided into a plurality of small rectangular plate members 3a having a smaller thickness than, for example, the electrode base 2, and as shown in FIG. the plate surface over the entire surface of the opposite side as facing the electrode substrate 2, oxide of Pt group <br/> metals such IrO ₂ conductive active material layer 11 which is mainly composed of are formed . The conductive active material layer 11 forms a discharge surface of the electrode 1. For example, a solution containing a compound of a corresponding metal is applied to the plate surface of the small plate material 3a, and this is heated in an oxygen-containing atmosphere. It is formed by a known method such as a method of baking, a method of applying and drying an oxide gel, and a method of applying a metal compound and then locally heat-treating with a burner or the like. Note that the conductive active material layer 11 can also be formed as a layer of Pt or an alloy thereof.

Next, as shown in FIGS. 3 and 4, a plate-like conductive receiving member having a predetermined width and depth along the longitudinal direction of the electrode base 2 is provided on the plate surface of the electrode base 2 on the side of the discharge member 3. Mounting part 12
Are formed at predetermined intervals along the short side direction of the electrode substrate 2 (three in this embodiment). The above-described conduction receiving member 4 is formed in a band shape corresponding to the conduction receiving member mounting portion 12, and the lower surface thereof is in surface contact with the bottom surface 12 a of the conduction receiving member mounting portion 12, and the upper surface is the surface of the electrode base 2. It is fitted to this with a slight protrusion from it. Further, the first screw members 5 are arranged at a plurality of positions along the longitudinal direction of the conduction receiving member 4 as shown in FIG. 3, and the screw insertion holes 13 formed in the conduction receiving member 4 as shown in FIG. At the same time, and the distal end side thereof is screwed into a female screw hole 14 opened on the bottom surface 12a of the conduction receiving member mounting portion 12. On the other hand, the head 5a of the first screw member 5 is housed in a circular counterbore 15 formed in the conduction receiving member 4, and the lower surface thereof is
5, the first screw member 5 is tightened toward the electrode base 2, so that the conduction receiving member 4 is attached to the head 5.
a, and is relatively pressed against the bottom surface 12a of the conduction receiving member mounting portion 12, so that a strong surface contact state is formed between the two.

Here, as shown in FIG.
Has a diameter and a depth slightly larger than the head 5a of the screw member 5, respectively, and a cover 16 made of Ti or Ti alloy that covers the top and side surfaces of the head 5a. Is welded, and a welded portion 17 is formed, which joins the outer peripheral edge of the upper surface (or the side surface) of the cover 16 and the opening edge of the counterbore portion 15 to seal therebetween. The plating solution is prevented from leaking into the electrode base 2 via the screw insertion hole 13 and the female screw hole 14. That is, the cover 16 and the welded portion 17 form a corrosion-resistant coating.

Next, as shown in FIGS. 1 and 4, the electrode substrate 2 has a circular cross-section which is opened at the bottom of the groove-shaped conductive receiving member mounting portion 12 and penetrates the electrode substrate 2 in the thickness direction. Are formed at predetermined intervals along the longitudinal direction of the conduction receiving member mounting portion 12. On the other hand, on the lower surface side of the conduction receiving member 4 at a position corresponding to each of the holes 18, for example, a convex portion 19 having a square cross section (see also FIG. 7) protruding from the lower surface and fitted into the hole 18 is formed. Have been. At a position corresponding to the convex portion 19, a projecting portion 20 having a flat top surface, for example, having a circular cross section (see also FIG. 7) is formed on the plate surface of the discharge member 3 on the conduction receiving member 4 side. ing. As a result, the discharge member 3 comes into surface contact with the plate surface of the conduction receiving member 4 on the top surface of the projecting portion 20, and
A gap corresponding to the height of the projection 20 is formed between the discharge member 3 and the conduction receiving member 4.

As shown in FIG. 4, the second screw member 6 is provided at a position corresponding to each of the projections 19 at the discharge member 3.
In the screw hole 22 formed in the conduction receiving member 4 at a position corresponding to the convex portion 19, the tip of the leg portion is inserted into the screw insertion hole 21 formed in the receiving member mounting portion 1.
It is screwed so that it may enter into the convex part 19 side rather than the bottom surface 12a of 2. Here, as shown in FIG. 4, the head 6 a of the second screw member 6 is housed in a circular counterbore 23 formed on the discharge member 3, and the lower surface of the head 6 a When the second screw member 6 is in contact with the bottom surface and the second screw member 6 is tightened to the conduction receiving member 4 side, the discharging member 3 is placed on the top surface of the above-mentioned projection 20 via the head 6a. Will be pressed relatively.

Next, as shown in FIG. 2, one end side of a plurality of bolt members 24 for mounting the electrode 1 on the plating cell 100 (FIG. 8) or the like is screwed to the back side of the electrode base 2. ing. Then, as shown in FIG. 4, the entire surface of the electrode base 2 excluding the arrangement of the power supply unit 7 (and the bolt member 24) and the conduction receiving member 4 and the side surface of the power supply unit 7 on the electrode substrate 2 side are, for example, It is covered with a corrosion-resistant metal coating layer 25 formed of a Ti or Ti alloy plate material. Here, the side surface of the conduction receiving member 4, the corresponding edge of the metal plate, and the seam of the metal plate forming the corrosion-resistant metal coating layer 25 are welded by the sealing weld 26.

As shown in FIGS. 3 and 4, the plate surface of the electrode base 2 to which the discharge member 3 is bonded is provided with a bakelite at a middle portion in the short side direction along the long side direction. Band-shaped recess forming member 27 made of plastic such as Ti or a corrosion-resistant metal such as Ti or Ti alloy.
Is fixed by a screw member 29 which passes therethrough and is screwed to the electrode base 2 side. The discharge member 3 covers the surface of the electrode base 2 avoiding the portion where the recess forming member 27 is disposed, and the upper surface of the recess forming member 27
Is formed so as to be recessed from the surface (discharge surface) of the discharge member 3, thereby forming a groove-shaped recess 28 together with the edge surface of the discharge member 3. This recess 2
Reference numeral 8 is used as a moving passage of a rod-shaped operation member 101 for operating a shielding member (not shown) for shielding a part of the discharge surface of the electrode 1 as shown in FIG. 4, for example. Here, the screw member 29 is made of, for example, a corrosion-resistant metal such as Ti or a Ti alloy, and is also made of a corrosion-resistant metal, and is screwed into a screw hole 30a of a boss 30 embedded in the electrode base 2 by screwing or press fitting. It is assumed.

Hereinafter, a method of using the electrode 1 will be described. That is, as shown in FIG. 8, a plurality of the electrodes 1 are provided on both sides of a steel sheet strip continuously conveyed through a plating cell 100 in which a plating solution is stored, with the strip S being sandwiched in the thickness direction. Are arranged in the direction of the short side of the electrode substrate 2 along the transport direction of the strip S, and the discharge members 2 are respectively arranged so as to face the plate surface of the strip S. As a result, the side of the discharge member 3 where the conductive active material layer 11 is formed, that is, the discharge surface side faces the plate surface of the strip S. Each electrode 1 is connected to the positive electrode side of the plating power supply 103 at the power supply unit 7, while the strip S is connected to the cathode side of the power supply 103 via a contact mechanism (not shown). As a result, as shown in FIG. 4, the electrode 1 is energized through the path of the power supply 7 → the electrode base 2 → the conduction receiving member 4 → the discharge member 3, from the surface of the conductive active material layer 11 (FIG. 4). The discharge is performed, and the plate surface of the strip S facing this is plated.

Since the electrode substrate 2 is mainly composed of an iron-based material such as carbon steel, the material cost can be reduced. Also,
As shown in FIG. 5, the conduction receiving member 4 and the receiving member mounting portion 1
Since the second bottom surface 12a forms a strong surface contact state by the fastening force of the first screw member 5, the conduction state is good.

Hereinafter, a method of assembling the electrode 1 will be described. That is, as shown in FIG. 7, the screw hole 14, the hole 18, and the groove-shaped
The electrode substrate 2 is manufactured by forming the above-mentioned components. Here, a new steel plate may be prepared.
It is also possible to remove the Pb or Pb alloy layer from the existing electrode in which the conductive active material layer is composed of b or Pb alloy, and to divert the remaining iron-based electrode substrate.

Next, the power supply section 7 (FIG. 4) is joined to the back surface of the electrode base 2 by welding. On the other hand, by processing a Ti or Ti alloy plate, a conduction receiving member 4 having a projection 19, a screw hole 22, and a screw insertion hole 13 is produced. Overlap so that it is positioned at In this state, the first screw member 5 is passed through the screw insertion hole 13 and tightened into the screw hole 14 on the base side, and further, the cap 16 is fitted into the counterbore portion 15 to form the welded portion 17, thereby providing conduction. Assembly of the receiving member 4 to the electrode base 2 is completed. The necessary portions of the electrode substrate 2 and the power supply section 7 are covered with a corrosion-resistant metal coating layer 25 (FIG. 4) made of a Ti or Ti alloy plate.

Then, the small plate member 3 to constitute the discharge member 3
a (where the conductive active material layer 11 (FIG. 4) has been formed) is placed on the electrode substrate 2 while positioning the screw insertion hole 21 in the screw hole 22 of the conduction receiving member 4, and further, the second screw member When the electrode 6 is inserted and screwed into the screw hole 22 to assemble it, the assembling of the electrode 1 is completed.

Embodiment 2 FIGS. 9 to 11 show a plan view, a front view, and a bottom view, respectively, of an electrode 50 according to Embodiment 2 of the present invention. In addition,
Since many parts of the electrode 50 are similar to the electrode 1 of the first embodiment, the common parts are denoted by the same reference numerals, and the description thereof will be omitted. The differences will be mainly described.

That is, as shown in FIG. 9, in the electrode 50, as shown in FIG. 12, there is provided a conductive receiving member which penetrates the electrode substrate 2 in the thickness direction and has a female screw portion 51a formed on the inner peripheral surface. A plurality of boss screw holes 51 as portions are dispersedly formed in the electrode substrate 2. And FIG.
As shown in FIG.
A boss 52 as a conduction receiving member formed in a cylindrical shape with a corrosion-resistant metal such as an i-alloy is screwed together by a male screw portion 52a formed on the outer peripheral surface thereof. The female screw portion 51a and the male screw portion 52a constitute first fastening means. Then, as shown in FIG. 13, the discharge member 3
The screw member 6, which is arranged in surface contact with the end surface of the boss 52 on the top surface of the boss 52 and is inserted into the screw insertion hole 21 as a second fastening means, is screwed into a screw hole 53 formed in the axial direction of the boss 52. By screwing into the electrode base 2, it is fastened to the electrode base 2 side.

According to the above configuration, since the boss 52 is fastened to the electrode base 2 by direct screwing, a good contact state is provided between the electrode base 2 and the boss 52 as the conduction receiving member. Is formed. In addition, the electrode 50 of the second embodiment
As shown in FIG. 11, among the small plate members 3 a constituting the discharge member 3, the joints 3 b adjacent to each other in the long side direction of the electrode base 2 are connected to the short side direction of the electrode base 2 (that is, In FIG. 8, it is formed in a staggered state so as not to be continuous in the strip S transport direction). That is, if the seam 3b is continuous, the plating layer formed on the strip S may become non-uniform at a position corresponding to the seam 3b to form a mark or the like, depending on plating conditions. Seam 3
By shifting b in this way, the effect of preventing or suppressing this can be achieved.

Here, as shown in FIG. 14, a flange 52b protruding outward along the outer peripheral surface can be formed on the end of the boss 52 facing the discharge member 3. Thereby, the lower surface side of the flange 52b can be brought into surface contact with the surface of the electrode substrate 2 at the opening peripheral portion of the boss screw hole 51, so that the conduction between the boss 52 and the electrode substrate 2 is further improved. Become. In this case, in order to achieve the effect without excess or deficiency, the area of the contact surface between the flange 52b and the boss screw hole 51 should be set so that the current density at the contact surface is 0.1 to 0.5 A / mm ² . The diameter of the male screw part 52a and the male screw part 52a
It is desirable that the screwing depth of the boss screw hole 51 be set so that the contact surface pressure on the contact surface is about ²⁰ to 150 kgf / cm ² . The boss screw hole 51
Counterbore 5 at the opening edge corresponding to the flange 52b
4 may be formed so that the lower surface of the flange 52b and the bottom surface of the counterbore portion 54 are brought into surface contact with each other.

[Brief description of the drawings]

FIG. 1 is a plan view of a plating electrode according to a first embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a bottom view of the same.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a sectional view taken along line BB of FIG.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is a partially exploded perspective view of the electrode of FIG. 1;

FIG. 8 is a schematic diagram showing an example of the arrangement of the electrodes of FIG. 1 in a plating line.

FIG. 9 is a plan view of a plating electrode of Example 2.

FIG. 10 is a front view of the same.

FIG. 11 is a bottom view of the same.

FIG. 12 is a sectional view taken along line DD of FIG. 9;

FIG. 13 is a partially exploded perspective view of the electrode of FIG. 9;

FIG. 14 is a cross-sectional view showing a modified example of the boss in an assembled state.

[Explanation of symbols]

 1,50 Plating electrode 2 Electrode substrate 3 Discharge member 4 Conduction receiving member 5 First screw member (first fastening means) 6 Second screw member (second fastening means) 11 Conductive active material layer 12 Conduction Receiving member mounting part 13 Screw insertion hole 14 Female screw hole 15 Counterbore part 16 Cover (corrosion-resistant coating part) 17 Welded part (Corrosion-resistant coating part) 18 Hole part 19 Convex part 20 Projection part 21 Screw insertion hole 22 Screw hole 23 Counterbore part Reference Signs List 25 corrosion-resistant metal coating layer 26 sealing welding part 50 plating electrode 51 boss screw hole (receiving member mounting part) 51a female screw part (first fastening means) 52 boss (conduction receiving member) 52a male screw part (first fastening Means) 52b Flange 53 Screw hole 54 Counterbore

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyoto Hirata 5-3 Tokaicho, Tokai-shi, Aichi Nippon Steel Corporation Nagoya Works (72) Inventor Hirokatsu Shimizu 19-, Sakaibashicho, Neyagawa-shi, Osaka 4 (72) Inventor Akira Takayasu 5-1-1 Hotta-dori, Mizuho-ku, Nagoya-shi, Aichi Prefecture Showa Lead Iron Co., Ltd. (72) Inventor Kiyoshi Ihara 5-1-1, Hotita-dori, Mizuho-ku, Nagoya-shi, Aichi Showa Within lead iron (58) Field surveyed (Int. Cl. ⁷ , DB name) C25D 17/12

Claims (14)

(57) [Claims] An electrode substrate made of iron or an iron alloy, and a corrosion-resistant metal made of Ti or a Ti alloy ,
And a conduction receiving member arranged on the side facing the member to be plated in contact with the electrode base; first fastening means for fastening the conduction reception member to the electrode base; and an arrangement portion of the conduction reception member Except for covering the surface of at least the side of the electrode substrate facing the member to be plated
A corrosion-resistant metal coating layer made of Ti or a Ti alloy; and a corrosion-resistant metal made of Ti or a Ti alloy , wherein a side of the electrode substrate facing the member to be plated is covered from above the corrosion-resistant metal layer and the conductive support is formed. A discharge member disposed so as to be in contact with the member and having a surface not facing the electrode substrate covered with a conductive active material coating layer mainly composed of a Pt group metal or an oxide thereof; And second fastening means for fastening the conduction receiving member fastened to the electrode base to each other, wherein the discharge member is energized through the electrode base and the conduction receiving member. An electrode for plating, characterized in that: 2. The plating electrode according to claim 1, wherein a contact surface is formed between the conduction receiving member and the electrode base along a direction intersecting with a fastening direction by the first fastening means. . 3. The contact surface according to claim 1, wherein a contact surface is formed between the conduction receiving member and the discharge member along a direction intersecting a direction of fastening by the second fastening means. Electrode for plating. 4. The first fastening means is a screw member that is screwed into the electrode base through the conduction receiving member, and is formed of a corrosion-resistant metal made of Ti or Ti alloy and has a head of the screw member. The plating electrode according to any one of claims 1 to 3, further comprising a corrosion-resistant coating portion that covers a portion side and seals a gap between the screw member and the conduction receiving member. 5. The plating electrode according to claim 1, wherein the second fastening means includes a screw member that is screwed into the conduction receiving member through the discharge member. 6. A concave or hole-shaped receiving member mounting portion which is opened on the surface of the electrode substrate is formed on a side of the electrode substrate facing the member to be plated, and the conduction receiving member has at least a part thereof. The plating electrode according to any one of claims 1 to 5, wherein the plating electrode is fastened to the electrode base by the first fastening means in a state of entering the receiving member mounting portion. 7. The first fastening means includes a female screw portion formed on an inner peripheral surface of the receiving member mounting portion, and a male screw portion formed on the conduction receiving member side and screwed with the female screw portion. 7. The method according to claim 6, wherein the screw fastening portion is formed.
The electrode for plating as described. 8. An electrode substrate having iron or an iron alloy, having a concave receiving member mounting portion opened on its surface on the side facing the member to be plated, and a corrosion-resistant metal made of Ti or Ti alloy. A conductive receiving member having at least a portion thereof disposed in the receiving member mounting portion and forming a contact surface with the bottom surface of the receiving member mounting portion; and being screwed into the electrode base through the conductive receiving member. Accordingly, a first screw member for fastening the conductive receiving member and the electrode base to each other, and covering at least a surface of the electrode base opposite to the member to be plated, except for an arrangement portion of the conductive receiving member.
A corrosion-resistant metal coating layer made of Ti or a Ti alloy, and a corrosion-resistant metal made of Ti or a Ti alloy , and arranged so as to cover a side of the electrode substrate facing the member to be plated from above the corrosion-resistant metal layer. And a discharge member whose surface not facing the electrode substrate is covered with a conductive active material coating layer mainly composed of a Pt group metal or an oxide thereof; A second screw member that fastens the discharge member and the conduction receiving member to each other by being screwed into the conduction receiving member fastened to the electrode base; and the electrode base and the conduction receiving member. An electrode for plating, wherein electricity is supplied to said discharge member via a member. 9. The electrode base has an opening at the bottom surface of the receiving member mounting portion and a bottomed or penetrating hole extending in the depth direction of the receiving member mounting portion. Correspondingly, the conduction receiving member is formed with a convex portion that enters the hole when mounted in the receiving member mounting portion, and the second screw member is provided at a position corresponding to the convex portion. 5. The plating device according to claim 4, wherein the tip is screwed into the conductive receiving member so that a tip of the receiving member enters the projecting portion side from a bottom surface of the receiving member mounting portion from a side opposite to the projecting portion. electrode. 10. The electrode base is formed in a plate shape, the receiving member mounting portion is formed in a groove shape along a plate surface of the electrode base, and the conduction receiving member is formed in the groove-shaped receiving portion. The plating electrode according to claim 9, wherein the plating electrode is formed in a horizontally long plate shape to be fitted to the member mounting portion. 11. The conductive receiving member has a plurality of convex portions formed along the longitudinal direction thereof, and the receiving member mounting portion has a plurality of the hole portions corresponding to the convex portions. 11. The plating electrode according to claim 10, wherein a plurality of the first screw members are provided at predetermined intervals in a direction along a longitudinal direction of the conduction receiving member at a position not interfering with the protrusion. 12. A concave or hole-shaped receiving member mounting portion which is made of iron or an iron alloy and has an opening on its surface and a female screw portion formed on an inner peripheral surface on a side facing the member to be plated. An electrode base; a cylindrical body formed of a corrosion-resistant metal made of Ti or a Ti alloy ; and a male thread formed on the outer peripheral surface of the body being screwed into the female thread of the receiving member mounting part. By covering, the conductive receiving member fixed to the electrode base and the surface of the electrode base at least on the side facing the member to be plated are covered except for the portion where the conductive receiving member is disposed.
A corrosion-resistant metal coating layer made of Ti or a Ti alloy; and a corrosion-resistant metal made of Ti or a Ti alloy , wherein a side of the electrode substrate facing the member to be plated is covered from above the corrosion-resistant metal layer and the conductive support is formed. A discharge member disposed so as to be in contact with the member and having a surface not facing the electrode substrate covered with a conductive active material coating layer mainly composed of a Pt group metal or an oxide thereof; And a screw member that fastens the discharge member and the conduction receiving member to each other by being screwed into the conduction receiving member fastened to the electrode substrate. An electrode for plating, wherein electricity is supplied to said discharge member via a receiving member. 13. A concave or hole-shaped receiving member mounting portion which is made of iron or an iron alloy and has an opening on its surface and a female screw portion formed on an inner peripheral surface on a side facing the member to be plated. An electrode base, having a cylindrical main body made of a corrosion-resistant metal made of Ti or Ti alloy, and screwing a male screw formed on an outer peripheral surface of the main body with the female screw of the receiving member mounting part; While being fixed to the electrode base by doing,
On the opening side of the receiving member mounting portion, an end of the main body portion is formed with a flange portion that protrudes outward along the circumferential direction, and when fixed to the electrode base, the lower surface of the flange portion is A conductive receiving member that is brought into surface contact with the opening peripheral portion of the receiving member mounting portion, and covers at least a surface of the electrode base opposite to the member to be plated, except for a portion where the conductive receiving member is disposed.
A corrosion-resistant metal coating layer made of Ti or a Ti alloy; and a corrosion-resistant metal made of Ti or a Ti alloy , wherein a side of the electrode substrate facing the member to be plated is covered from above the corrosion-resistant metal layer and the conductive support is formed. A discharge member disposed so as to be in contact with the member and having a surface not facing the electrode substrate covered with a conductive active material coating layer mainly composed of a Pt group metal or an oxide thereof; And a screw member that fastens the discharge member and the conduction receiving member to each other by being screwed into the conduction receiving member fastened to the electrode substrate. An electrode for plating, wherein electricity is supplied to said discharge member via a receiving member. 14. A counterbore portion is formed at an opening peripheral portion of the receiving member mounting portion, and the flange portion is housed in the counterbore portion in a state where the conduction receiving member is fixed to the electrode base. 14. The plating electrode according to claim 13, wherein the lower surface of the flange portion is in surface contact with the bottom surface of the counterbore portion.