JPS63183192A - Continuous electroplating device for band steel - Google Patents

Abstract

PURPOSE:To carry out stabilized continuous plating even under the plating conditions at high temps, etc., to efficiently utilize the plating bath soln. at the minimum capacity, and to facilitate the control by continuously supplying a soluble strip anode around a band steel, and forming the wall of a plating bath with the anode. CONSTITUTION:A soluble strip anode 21 of Al, etc., is continuously supplied from a rewinding roll 25 and traveled by a feed roll 23, an anode conductor roll 27, etc., and a band steel 12 is traveled as shown in the figure. Consequently, the band steel 2 is surrounded by the anode at appropriate intervals, and the wall of a plating bath 10 is formed by the anode 21. The plating bath soln. 11 is charged into the plating bath 10 formed with the anode 21, the roll 23, and a lower seal 24, and the band steel 2 is continuously passed to apply a desired plating to the surface. The consumed anode 21 is successively wound on a winding roll 26, and exchanged for a fresh one. By this method, the control is especially facilitated when a molten salt is used as the bath soln. 11.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a continuous electrolytic plating apparatus for steel strip.

[Conventional technology]

An example of conventional plating equipment such as Zn@an is shown in FIG.

In FIG. 3, the steel strip 2 unwound from the payoff free A/1 is welded to the end of the preceding steel strip in a welding machine 3, and then passes through a louver 4 to a pretreatment device 5 where it undergoes degreasing, preheating, etc. Necessary treatments are applied before plating. Then plating tank 1
After the surface is plated in 0, the post-processing device 6
It is subjected to processing such as washing and drying, passes through a looper 7 and a shear 8, and is wound up at a tensioner 9.

The plating bath 10 is filled with a plating bath liquid 11, and the steel strip 2
are conductors a-tv12a, 12b.

12cm--and deflector low A/1311°15
b. Plating bath solution 11 while wrapping alternately around 13 cm.
Run inside. In the plating bath liquid 11, on the electrode 141,
14b, 14c, and 14cl-m- are installed facing the surface of the steel strip 2, and the surface of the steel strip 20 is plated while the steel strip 2 passes between the electrodes as described later.

FIG. 4 is a detailed explanation of the structure of the electrode section of this conventional plating equipment.
The conductor row A/12a is connected to the cathode side of the DC power supply 18a. Electrode 14
If the plating solutions sandwiched between a and 14b and the steel strip 2 are 19a and 19b, respectively, then the direct power supply 18a to the electrode 14a
, 14b ~ plating solution 19a, 19b ~ steel strip 2 ~ conductor row/I/12I! An electric circuit consisting of L~DC power supply 18a is formed, electrodes 14a and 14b are anodes, and steel strip 2
serves as a cathode, and the plating metal contained in the plating bath liquid 11 is plated onto the surface of the steel strip 20 by the current flowing between the plating bath liquid 11 and the plating bath liquid 11 .

An example of a conventional structure of a soluble electrode will be explained with reference to FIGS. 5 and 6. As the anode of electrolytic plating equipment, there is a method in which the anode electrodes 14a and 14b are electrolyzed and dissolved into the plating bath solutions 19a and 19b by energizing the electric circuit for plating ("soluble anode"). (“insoluble anode” method)
) is well known, but in the case of a "soluble anode", the anode electrode 14a,
14b is consumed. Therefore, the anode electrodes 14a, 14b
When it wears out, it must be removed and replaced with a new one.

Figure 5 is an enlarged view of the soluble anode part in the conventional method.
FIG. 6 shows the arrow B, and the anode electrode 14
a is a rectangular anode block.
e 14 al e ---It is divided into two parts, placed on the current-carrying part 15 fixed to the anode bridge 16, and inserted between the anode guides 17a and 17b to prevent the lower part from wobbling. The trap is attached so that it can be moved in the direction of the arrow in Figure 6 using a jig or the like.

The anode blocks 14a4, 14bm e--1 are consumed by energization, and the anode block 14a has the highest amount of consumption! The new anode plate 14a1 is sequentially removed and installed.

This anode block 14a4.14-9---14 al
The removal and installation are performed manually from the top of the plating bath 10 using a jig or the like.

[Problem that the invention seeks to solve]

In the case of special plating conditions (high temperature, isolation from the atmosphere, etc.) such as in continuous electrolytic plating equipment using molten salt, replacing the soluble anode using the means shown in Figures 5 and 6 does not improve work efficiency. However, there are problems in terms of safety, prevention of impurities in the plating bath solution, prevention of pollution, etc., the structure is complicated, and it is very dangerous to replace it manually. Ta.

Furthermore, the capacity of the plating tank that accommodates a large number of anode electrodes and a large number of deflector rows that change the running direction of the steel strip is extremely large, and the plating bath solution stored therein must necessarily have a large capacity. For this reason, not only a large amount of plating bath liquid which is not directly involved in the plating work is required, but also, when the plating bath liquid is a molten salt, there is a serious drawback that it is extremely difficult to control the temperature, properties, etc. of the plating bath liquid.

The object of the present invention is to provide a continuous electrolytic plating apparatus that solves these problems.

[Means for solving problems]

For this reason, the present invention provides a continuous electrolytic plating apparatus for continuously plating the surface of a steel strip, which is equipped with a soluble strip anode that is continuously supplied as an anode, and the strip anode is surrounded around the outer periphery of the steel strip. The present invention is characterized in that the wall surface of the plating tank is constructed using the same structure, and the above-mentioned problems have been solved with such a construction.

[Effect]

In the present invention, a soluble belt-shaped anode is adopted, and the belt-shaped anode is arranged so as to draw a surrounding locus at appropriate intervals around the outer periphery of the steel strip of the material to be plated, and the wall surface of the plating tank is formed by the belt-shaped anode itself. Then, a plating bath solution is stored between the steel strip and the strip anode, and the steel strip is continuously passed through this bath solution to perform the desired plating treatment on the surface, and the strip anode that is consumed is sequentially moved. Since the plating bath is designed to be replaced with a new one, a relatively small volume of plating bath solution is stored only between the strip anode facing the steel strip, and if the bath solution is molten salt. , its management is extremely easy, and the soluble band-shaped anode can be continuously and airtightly supplied from outside the sealed maturing device as it wears out. Everything will be resolved.

〔Example〕

An embodiment of the present invention will be explained with reference to FIGS. 1 and 2.

In FIG. 1, 2 is a steel strip, 12a, 12b-m- is a conductor roll, 13a, 13b.

-11 deflector row〃, 10 is a plating tank, the wall surface of which is a soluble belt-shaped anode 21 that moves perpendicularly to the steel strip 2 (an aluminum strip plate was adopted on the wood flow side).

As shown in FIG. 2, which will be described later, this belt-shaped positive @ 21 is supported by a backup row A/2°2 so as to surround the outer circumference of the steel strip 2 at appropriate intervals to form a constant loop. In addition, the side end V-ru of the plating tank 10 also serves as a feeder for the belt-shaped anodes 21.
A molten salt 11 is stored as a plating bath liquid in a plating tank 10 formed by a feeder Jiro/l/25.

Note that 24 in FIG. 1 is the bottom sea μ of the plating tank 10.

This FIG. 2 is a sectional view taken along the person-to-person arrow in FIG. 1, and shows an example of continuous supply means for the strip anode 21.

In FIG. 2, the band-shaped anode 21 is brought in in the form of a coil, unwound by an unwinding reel μ25, sent to the electrode part by a feeder Jiro A/23, and after being consumed while passing through the electrode part, it is unwound. It is sequentially wound up by Series 1W26. In addition, 27 is an anode conductor roll for supplying electricity to the strip-shaped anode 21.

On the actual flow side, aluminum is used as the soluble strip anode, but this does not preclude the use of other metal materials.In addition, if molten salt is used as the plating bath solution, However, in this rush flow side view, these facilities and steel strip pre- and post-treatment equipment are the same as those in the prior art, and are therefore not shown.

〔Effect of the invention〕

According to the present invention, even when special plating conditions (high temperature, generation of toxic gas, deterioration of plating bath solution due to moisture in the atmosphere, etc.) are required, the soluble plating can be achieved safely, stably, and without impairing the plating conditions. It is possible to continuously supply the anode, it is possible to stably and continuously plate the steel strip surface, and the plating bath solution can be used effectively with the minimum necessary volume. This has the excellent effect of making it extremely easy to manage the plating bath solution.

[Brief explanation of the drawing]

FIG. 1 is a detailed configuration diagram showing one rush flow side of the electrode part of the present invention;
Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, Fig. 3 is a block diagram of the entire conventional continuous electrolytic plating equipment, Fig. 4 is a detailed block diagram of the electrode section in Fig. 3, and Figs. 6, which is a view in the direction of the arrow in FIG.
The figure is an explanatory diagram of a conventional soluble anode. 2... Steel strip, 10-... Plating bath, 11-... Plating bath solution, 12 a, 12 b, 12 c...
Conductor Law p15&, 15b...Deflector Award-
N, 21... Soluble strip anode 22... Backup roll, 23... Feed c'-
μ24--bottom sea of plating tank〃, 25--unwinding reel 26--take-up reel, 27--anode conductor row〃Fig. 1Fig. 3

Claims (1)

[Claims] A continuous electrolytic plating apparatus that continuously performs plating treatment on the surface of a steel strip is equipped with a soluble strip anode that is continuously supplied as an anode, and the strip anode is surrounded around the outer periphery of the steel strip to coat the wall surface of the plating tank. A continuous electrolytic plating apparatus for steel strip, characterized by comprising: