JP2827688B2 - Measuring device for coating weight of plated steel sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an electrolytic solution contained in an electrolytic cell, in which a carbon electrode is used as a cathode and a sample of a plated steel plate is used as an anode. The present invention relates to a device for electrochemically measuring a steel plate based on a law, and in particular, a plated steel plate which can easily attach and detach a plated steel sample to and from an electrolytic cell, and can reliably prevent operation errors such as electrolyte leakage. The present invention relates to a plating adhesion amount measuring device.

[0002]

2. Description of the Related Art Conventionally, a galvanized steel sheet has been coated with a carbon electrode as a cathode and a galvanized steel sample as an anode in an electrolytic solution contained in an electrolytic cell. Is electrochemically determined based on the Faraday's law.

FIG. 4 is a circuit diagram showing a configuration example of this type of plating adhesion amount measuring apparatus. As shown in FIG.
An electrolytic solution (for example, caustic soda solution) 2 is accommodated in the inside of the container. In the electrolytic solution 2, a platinum electrode 3 is used as a cathode, and a plated steel plate sample 4 is provided as an anode. And a constant current generator 5 connected thereto. In the figure, V indicates a voltmeter, and I indicates an ammeter.

[0004] Further, with such a plating adhesion amount measuring apparatus,
When the amount of plating (zinc) is measured based on the JIS standard (G-3313), as a method of attaching the sample piece 4 to the electrolytic cell 1, an apparatus as shown in a sectional view in FIG. Is coming.

That is, in FIG. 5, when the sample piece 4 in the electrolytic cell 1 is replaced, the tank 6 is lowered and the electrolytic cell 1 is replaced.
The electrolytic solution 2 in the inside is transferred to a tank 6 through a hose 7, then the old sample piece 4 is removed, and a new sample piece 4 is placed in the electrolytic cell 1
After pressing the push plate 10 against the new sample piece 4 via the bearing 9 to lock the handle 8 by tilting the handle 8, the tank 6 is lifted, and the electrolytic solution in the tank 6 is lifted. 2 is transferred to the electrolytic cell 1 again through the hose 7 to confirm that the electrolytic solution 2 has not leaked. In the figure, reference numeral 11 denotes a silver reference electrode, and reference numeral 12 denotes a table.

However, in such an attaching method, when attaching the sample piece 4 to the electrolytic cell 1, the attaching and detaching is extremely troublesome and troublesome, and furthermore, an operation error such as leakage of the electrolyte occurs. There's a problem.

[0007]

As described above, in the conventional apparatus for measuring the coating weight of a plated steel sheet, when the sample piece of the plated steel sheet is attached to and removed from the electrolytic cell, the operation is very troublesome. It is troublesome, and furthermore, there is a problem that leakage of the electrolytic solution or the like occurs due to an operation error.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a plated steel sheet can be easily attached to and removed from an electrolytic cell, and operation errors such as electrolyte leakage can be reliably prevented. It is an object of the present invention to provide an apparatus for measuring the amount of plating of a plated steel sheet, which can perform plating.

[0009]

According to the present invention, in order to achieve the above object, a carbon electrode is used as a cathode and a sample of a plated steel plate is used as an anode in an electrolytic solution contained in an electrolytic cell. In an apparatus for electrochemically measuring the amount of plating of a plated steel sheet based on Faraday's law, a pipe having a circular opening for adsorbing a sample piece and a pipe for inserting a vacuum pipe therein. A suction cup having an introduction portion, the opening is disposed opposite to one surface of the sample piece, and an annular anode disposed between the opening of the suction cup and the sample piece and closing the opening. The vacuum pump is provided so as to be inserted from the pipe introduction portion of the suction cup, and has one end connected to the center hole of the annular anode and the other end connected to a vacuum pump.

[0010] In the apparatus for measuring the amount of plating on a plated steel sheet according to the first aspect, an O-ring suitable for the shape of the sample piece is provided on a portion of the suction cup facing the peripheral edge of the sample piece. .

[0011]

Therefore, in the apparatus for measuring the coating weight of a plated steel sheet according to the present invention, a vacuum pipe is inserted into a suction cup provided with an O-ring, and an annular pipe is provided at one end of the vacuum pipe. By fixing the anode, a sample piece conforming to the shape of the O-ring is brought into contact with the O-ring, and the sample piece is evacuated by a vacuum pump connected to the other end of the vacuum evacuation pipe. At the same time, the annular anode and the periphery of the opening of the suction cup come into contact with each other. Thereafter, the suction cup is immersed in the electrolytic solution in the electrolytic cell, and the sample piece is attached to the electrolytic cell, so that only one surface of the sample piece can be easily exposed to the electrolytic solution. This makes it possible to easily attach and remove the plated steel sheet sample from the electrolytic cell,
Further, operation errors such as electrolyte leakage can be reliably prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of the configuration of an apparatus for measuring the amount of plating of a plated steel sheet according to the present invention.
The same elements as those in FIG. 5 are denoted by the same reference numerals.

In FIG. 1, an electrolytic solution (for example, caustic soda solution) 2 is accommodated in an electrolytic bath 1 and the electrolytic solution 2
In the figure, a carbon electrode 20 is provided as a cathode, and a sample 4 of a plated steel plate is provided as an anode, as shown in the figure. Further, a tank 6 for adjusting the electrolyte level is connected to the bottom of the electrolytic cell 1 via a hose 7 as shown in the figure. Further, a silver reference electrode 11 is disposed above the electrolytic cell 1 with its lower end portion immersed in the electrolytic solution 2.

On the other hand, a suction cup 21 is immersed in the electrolytic solution 2. As shown in FIGS. 2 and 3, the suction cup 21 has a circular opening for adsorbing a sample piece and a pipe for inserting a vacuum pipe therein, as shown in FIGS. It has a pipe introduction part, and the opening is provided so as to face one surface of the sample piece 4. In addition, the suction cup 21
An annular anode 22 for closing the opening is provided between the opening and the sample piece 4. Further, a pipe 23 for evacuation is inserted from the upper part of the electrolytic cell 1 through the pipe introduction part of the suction cup 21. Then, the lower end of the evacuation pipe 23 is connected to the center hole of the annular anode 22, and the upper end is connected to one of the valves 25, 26, 27 arranged in a T-shape via a hose 24. Valve 25
The other valve 26 is an outside air inlet, and the further lower valve 27 is connected to a vacuum pump 29 via a drain box 28. An O-ring 30 corresponding to the shape of the sample piece 4 is provided at a portion of the suction cup 21 facing the peripheral edge of the sample piece 4. Next, the operation of the plating amount measuring apparatus of the present embodiment configured as described above will be described.

In FIG. 1, in order to expose only one surface of the sample 4 to the electrolyte 2, one surface of the sample 4 corresponding to the size of the O-ring 30 is brought into contact with the suction cup 21 via the O-ring 30. . Then, in this state, the outside air introduction valve 2
6 is closed, valves 25 and 27 are opened, and vacuum pump 29
When vacuuming is performed, one surface of the sample piece 4 is firmly adsorbed to the suction cup 21 and at the same time comes into contact with the annular anode 22 connected to the lower end of the vacuuming pipe 23. By immersing the sample piece 4 in the electrolytic cell 1, only one surface of the sample piece 4 is
Can be exposed inside.

On the other hand, to remove the sample piece 4 from the electrolytic cell 1, the suction cup 21 is lifted and taken out of the electrolytic solution 2, the operation of the vacuum pump 29 is stopped, the evacuation is stopped, and the valve 27 is closed. Then, the sample piece 4 can be removed from the suction cup 21 by opening the valve 26 and then slightly applying vibration.

As described above, in this embodiment, the electrolytic cell 1
A carbon electrode 20 is used as a cathode and a sample 4 of a plated steel plate is provided as an anode in the electrolyte solution 2 contained therein, and the amount of plating applied to the plated steel plate is electrochemically measured based on Faraday's law. The apparatus has a circular opening for adsorbing a sample piece, and has a pipe introduction section for inserting a vacuum evacuation pipe 23 therein, and the opening is disposed to face one surface of the sample piece 4. Sucker 21 and sucker 21
An annular anode 22 disposed between the opening of the sample piece 4 and closing the opening, and a central hole of the annular anode 22 provided with one end side inserted from the pipe introduction portion of the suction cup 21. 2 which is connected to the other end and has a T-shaped arrangement at the other end.
5, 26, 27, and a vacuum pumping pipe 23 connected to a vacuum pump 29 via a drain box 28, and a suction cup 21 provided at a portion facing the peripheral portion of the sample piece 4;
And an O-ring 30 corresponding to the shape of the sample piece 4.

Therefore, the vacuum evacuation pipe 23 is inserted and provided inside the suction cup 21 provided with the O-ring 30, and the annular anode 22 is fixed to one end of the vacuum evacuation pipe 23. The sample piece 4 conforming to the shape of the sample piece 30 is brought into contact with the O-ring 30, and is evacuated by the vacuum pump 29 connected to the other end of the evacuation pipe 23, so that the sample piece 4 is adsorbed on the suction cup 21. At the same time, the annular anode 22 and the periphery of the opening of the suction cup 21 come into contact with each other, so that the suction cup 21 is immersed in the electrolytic solution 2 in the electrolytic cell 1 so that only one surface of the sample piece 4 is removed. Exposure to the electrolyte solution 2 is easily possible. Thereby, the sample piece 4 of the plated steel sheet can be easily attached to and detached from the electrolytic cell 1, and further, it is possible to reliably prevent an operation error such as leakage of the electrolytic solution 2. It should be noted that the present invention is not limited to the above embodiment, and can be implemented in various modifications without departing from the spirit of the invention.

In the above embodiment, the valve 2 arranged in a T-shape
The case where 5, 26, and 27 are used has been described. However, the present invention is not limited to this, and the same effects can be obtained by applying the present invention in the same manner even if a three-way valve is used instead of these valves. You can do it.

In the above embodiment, the case where the O-ring 30 is provided at the portion of the suction cup 21 facing the peripheral portion of the sample piece 4 has been described, but this is not essential to the present invention.

[0021]

As described above, according to the present invention, a carbon electrode is used as a cathode in an electrolytic solution contained in an electrolytic cell,
In addition, a sample piece of a plated steel sheet is provided as an anode, and an apparatus for electrochemically measuring the amount of plating of the plated steel sheet based on Faraday's law has a circular opening for adsorbing the sample piece, and is evacuated. Having a pipe introduction portion for inserting a pipe for the inside, a suction cup having an opening disposed opposite to one surface of the sample piece, and disposed between the opening of the suction cup and the sample piece; An annular anode closing the opening,
It is inserted from the pipe introduction part of the suction cup, and one end is connected to the center hole of the annular anode, and the other end is provided with a vacuum pumping pipe connected to a vacuum pump. It is possible to provide an apparatus for measuring the coating weight of a plated steel sheet, which can easily attach and remove the sample piece to the electrolytic cell, and can surely prevent operation errors such as electrolyte leakage.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an apparatus for measuring a coating weight of a plated steel sheet according to the present invention.

FIG. 2 is a plan view showing a detailed configuration example of a suction cup in the embodiment.

FIG. 3 is a longitudinal sectional view showing a detailed configuration example of a suction cup in the embodiment.

FIG. 4 is a circuit diagram showing a configuration example of a conventional apparatus for measuring the amount of coating of a plated steel sheet.

FIG. 5 is a cross-sectional view showing a configuration example near an electrolytic cell of a conventional apparatus for measuring the amount of plating of a plated steel sheet.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electrolysis tank, 2 ... Electrolyte solution, 4 ... Sample piece, 5 ... Constant current generator, 6 ... Tank, 7 ... Hose, 11 ... Silver reference electrode, 2
0: carbon electrode, 21: sucker, 22: annular anode, 23:
Vacuum piping, 24 ... Hose, 25, 26, 27 ... Valve, 28 ... Drain box, 29 ... Vacuum pump, 30
... O-ring.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keiji Nakano 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Eizou Toda 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan (72) Inventor Yasushi Fukushima 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Noritake Kintaka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References JP-A-63-269052 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01N 27/42

Claims (2)

(57) [Claims] 1. A carbon electrode is used as a cathode and a specimen of a plated steel sheet is provided as an anode in an electrolytic solution accommodated in an electrolytic cell, and the amount of plating applied to the plated steel sheet is determined based on Faraday's law. In the device for performing the measurement, in addition to having a circular opening for sample piece adsorption, and having a pipe introduction part for inserting a pipe for vacuum evacuation inside,
A suction cup provided with the opening opposed to one surface of the sample piece, an annular anode disposed between the opening of the suction cup and the sample piece, and closing the opening; And a vacuum pipe connected at one end to the center hole of the annular anode and connected to the vacuum pump at the other end. An apparatus for measuring the coating weight of a plated steel sheet. 2. The apparatus according to claim 1, wherein the suction cup has an O-ring corresponding to the shape of the sample piece at a portion of the suction cup facing the peripheral edge of the sample piece. Characteristic device for measuring the coating weight of plated steel sheets.