KR20100078931A - Apparatus and method of etching for exposure of sample - Google Patents

Abstract

PURPOSE: An etching apparatus for the exposure of a sample and a method thereof are provided to reduce etching process times for the exposure of a sample by automating an etching preparation step, an etching step, and a reagent discarding step. CONSTITUTION: An etching apparatus for the exposure of a sample comprises a hot water supply part(100), a reagent mixing part(200), an etching tank(300), a brush part(400), an automatic control part(700), a thermostat part(500), and a drain tank(600). The hot water supply part stores warm water. The reagent mixing part mixes the warm water and the regent according mixing signals. The etching tank etches the sample by receiving a mixed solution according to the mixing signals. The brush part brushes the surface of the sample according to brush signals. The automatic control part produces the mixing signals, the etching signals, and the brush signals by the input of a user.

Description

Apparatus and method of etching for exposure of sample}

The present invention relates to a specimen display corrosion apparatus and method, and to a specimen display corrosion apparatus and method capable of shortening the corrosion process time by automating the corrosion process for specimen display.

Generally, a corrosion process is performed to reveal the internal structure of the test slab. For this purpose, the produced test pieces are cut in the length and center directions. Subsequently, a corrosion process is performed for the appearance of the texture of the machined surface.

1 is a process photograph for explaining a conventional specimen display corrosion process.

Referring to the conventional specimen display corrosion process, first, as shown in (a) of FIG. Subsequently, the electric heater is placed in the PVC barrel and heated.

Subsequently, when the temperature of the water reaches 70 to 75 degrees as shown in (b) of FIG. 1, the beaker containing the reagent is filled with water and mixed with the corrosive chemical.

Subsequently, as shown in (c) of FIG. 1, a mixture of the water and the reagent is poured into the container containing the processed specimen to undergo corrosion.

Subsequently, as shown in (d) of FIG. 1, the mixture is kept at a constant temperature with an electric heater to smoothly proceed corrosion, and the specimen surface is continuously wetted reciprocally using a brush to prevent local corrosion progression of the processing surface.

Subsequently, as shown in (e) of FIG. 1, the corrosion-treated specimen is taken out and the remaining mixed liquid is discarded. And the corrosion test piece is wash | cleaned. The containers used afterwards are cleaned to prepare for the next operation.

As described above, in the conventional corrosion process for specimens, all the processes are performed manually by an operator. This increases the fatigue caused by the repeated process, as well as the disadvantage that a lot of time and manpower is consumed.

In addition, it is not only difficult to keep constant the mixing ratio composition between water and reagents, but also to maintain the temperature of the corrosion progressing process within a certain range, but there is a problem that the process temperature is frequently lowered.

In addition, in order to prevent the local corrosion of the surface in the process of corrosion of the processed specimen surface by the corrosion solution, the operator reciprocates the surface of the processed specimen continuously (about 10 to 20 minutes) using a brush. However, local erosion occurs due to irregularities in the reciprocating motion, and thus there is a problem in that smooth tissue is not displayed. And, in particular, a hazard problem occurs in which the worker inhales toxic substances.

Therefore, the present invention was derived to solve the above problems, by performing the specimen corrosion using an automatic control system, it is possible to improve the work efficiency, save time and manpower, to prevent corrosion failure, the specimen It is an object of the present invention to provide a specimen display corrosion apparatus and method that can promote the uniform corrosion of the surface to improve the sharpness of tissue appearance, and can solve the problem of hazards of workers by toxic substances.

The present invention is a hot water supply unit for storing hot water; A reagent mixing unit mixing the hot water and the reagent according to a mixing signal; Corrosion tank to corrode the specimen by receiving the mixed solution in accordance with the corrosion signal; A brush unit for brushing the specimen surface according to a brush signal; And an automatic control unit configured to generate the mixed signal, the corrosion signal, and the brush signal according to a user's input.

It is preferable to further include a heat retaining unit for maintaining a constant temperature of the mixed liquid in the reagent mixing unit and the corrosion tank unit, and a drain tank unit for draining the mixed liquid provided to the corrosion tank unit in accordance with the drain signal of the automatic control unit.

The heat retaining unit includes a heating tank for heating a fluid, a pump for providing the heated fluid to the reagent mixing unit and the corrosion tank, and the reagent mixing unit, the pump, and the corrosion tank according to a thermal control signal of the automatic controller. It is possible to include first and second oil control valves that open and close between pumps.

The hot water supply unit is a hot water tank receiving cold water and storing the heated hot water, heating means for heating the water in the hot water tank, and hot water control for providing hot water of the hot water tank to the reagent mixing unit according to the mixing signal. It is possible to include a valve.

The reagent mixing unit may include a mixing tank receiving hot water and a reagent according to the mixing signal, an agitator for stirring hot water and a reagent in the mixing tank according to the mixing signal, a reagent supply unit providing a reagent to the mixing tank, And a first heat insulating part for maintaining a constant temperature of the mixing tank, and a mixed liquid control valve for providing the mixed liquid of the mixing tank to the corrosion tank according to the corrosion signal.

The corroding tank may include a corroding tank for corroding the specimen using the mixed liquid, and a second warming unit for maintaining a constant temperature of the mixed liquid in the corroding tank.

The brush unit includes a moving frame extending in an upper direction of the corroding part, at least one brush extending and coupled to the corroding part in the moving frame, and installed at both edges of the moving frame to the brush signal. Therefore, it is possible to include a drive wheel portion for reciprocating in the front and rear direction.

The brush unit includes a moving frame extending in one direction above the corroding unit, at least one brush extending and coupled to the corroding unit in the moving frame, and provided at both edges of the upper side of the corroding unit. It may include a conveyor belt coupled to each end and the moving means for moving the conveyor belt in the front and rear directions.

In addition, preparing the hot water according to the present invention; Mixing the warm water and a reagent; Providing a mixed solution in the corroding vessel containing the specimen; Moving the brush above the specimen contained in the mixed liquid in the front-rear direction; And draining the mixed liquid in the corroding tank, each step providing a specimen display corrosion method controlled by a signal of an automatic control unit.

After the step of draining the mixed solution, it is effective to include the step of washing the corrosion bath and the specimen through the cleaning means.

As described above, the present invention can automate the corrosion preparation step, the corrosion step, and the reagent disposal step through the automatic control unit, thereby reducing the corrosion process time for specimen display, reducing the operator, and the worker's hazard by toxic substances. You can solve the problem.

In addition, the present invention is to prevent the amount of corrosion by brushing the upper side of the specimen at a uniform speed and interval, and to promote the uniform corrosion of the surface of the specimen to improve the sharpness of tissue appearance.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like numbers refer to like elements in the figures.

Figure 2 is a block conceptual diagram of a corrosion apparatus for specimen display according to an embodiment of the present invention. 3 is a perspective conceptual view of a partial region of the specimen display corrosion apparatus according to an embodiment. 4 is a photograph of a hot water tank according to an embodiment. 5 is a photograph of a mixing tank according to one embodiment. 6 is a photograph of a brush part according to an exemplary embodiment. 7 is a photograph of a heating bath according to an embodiment. 8 is a photograph of a control panel of an automatic controller according to an embodiment.

2 to 8, the specimen display corrosion apparatus according to the present embodiment is a hot water supply unit 100 for providing hot water according to the first control signal, and the hot water and the reagent in accordance with the second control signal A reagent mixing part 200 for providing a mixed solution in which reagents are mixed according to a third control signal, a corrosion tank part 300 for corroding the specimen using the mixed liquid, and a fifth control signal above the specimen surface. The brush unit 400 reciprocating, the heat retaining unit 500 which maintains the temperature of the reagent mixing unit 200 and the corrosion tank unit 300 according to the sixth control signal, and the seventh control signal. As a result, it includes a drain tank 600 for draining the mixed solution of the corrosion tank 300, and an automatic control unit 700 for generating the first to seventh control signal.

Here, the hot water supply unit 100, the reagent mixing unit 200, the corrosion tank unit 300, the thermal insulation unit 500 and the drain tank unit 600 are interconnected by a pipe. The hot water supply unit 100, the reagent mixing unit 200, the corrosion tank unit 300, the brush unit 400, the thermal insulation unit 500, and the drain tank unit 600 are automatically controlled by an electrical wiring 700. Is connected to.

The above-mentioned specimen display corrosion apparatus can automate control of the cooling water for corrosion of the specimen surface, mixing the corrosion solution, maintaining the temperature of the mixture, uniform corrosion of the specimen surface, and disposal and storage of the used reagents by PLC automatic control. Will be. Through this, the concentration of the mixed solution can be kept constant, and the degree of corrosion on the surface of the specimen can be kept constant, thus making it easier to express tissue. In addition, the temperature of the mixed liquid can be kept constant, thereby improving the corrosion force. In addition, it is possible to shorten the time of the corrosion process on the surface of the specimen for measuring the quality of the cast after the reproducing process.

Hereinafter will be described in detail with respect to the specimen display corrosion apparatus described above.

First, the hot water supply unit 100 provides hot water to the reagent mixing unit 200 according to the first control signal of the automatic control unit 700.

The hot water supply unit 100 is a hot water tank 110 for storing the heated hot water received cold water as shown in Figures 2 and 4, the heating means 120 for heating the hot water tank 110, and It is provided with a hot water control valve 130 provided in the hot water discharge pipe of the hot water tank 110 to discharge hot water according to the first control signal.

Of course, although not shown, it may be further provided with a cold water supply valve for providing cold water to the hot water tank 110 through a separate control signal.

Here, the water inside the hot water tank 110 by the heating means 120 preferably maintains a temperature within the range of about 70 to 75 degrees. Various types of heaters or heating apparatuses may be used as the heating means 120.

The hot water tank 110 is effective to store a larger amount of hot water than the amount of hot water used in the corrosion process for specimen corrosion. For example, hot water for 3 to 6 process minutes is stored. This allows a large number of corrosion processes to be carried out continuously. Of course, when the hot water is discharged from the hot water tank 110 for a single process, the hot water tank 110 may always store a constant amount of hot water because the amount of cold water is filled.

When the first control signal is generated by the automatic controller 700, the hot water control valve 130 operates to provide hot water to the reagent mixing unit 200 through a pipe. The reagent mixing unit 200 generates a mixed liquid by mixing hot water and a reagent. The hot water control valve 130 described above preferably uses a valve that is opened and closed by an electrical signal. Of course, the control valves in the following description also use a valve that is opened and closed by an electrical signal.

The reagent mixing unit 200 agitates the mixing tank 210 receiving the hot water and the reagent as shown in FIGS. 2, 3, and 5, and the hot water and the reagent in the mixing tank 210 according to the second control signal. A stirrer 220, a reagent supply unit 230 for providing a reagent to the mixing tank 210, a first thermal insulation unit 240 for maintaining a constant temperature of the mixing tank 210, and a third control. A mixed solution control valve 250 for discharging the mixed solution of the mixing tank 210 according to the signal is provided.

Here, the reagent supply unit 220 may provide the reagent to the mixing tank 210 according to the first control signal or the second control signal. Of course, a separate amount of reagent may be provided to the mixing tank 210 by a separate control signal.

Through this, a predetermined amount of hot water and a reagent may be provided inside the mixing tank 210. A more accurate amount, i.e., a constant amount, can be provided than by an existing operator, so that the concentration of the mixed liquid can be kept constant at all times (i.e., every corrosion process).

The reagent supply unit 220 is effectively provided with an injector in the form of a piston. This moves the piston forward by the control signal to provide the reagent to the mixing tank (210). The piston may then move back to receive and store a certain amount of reagent. In addition, the stirrer 220 is positioned inside the mixing tank 210 to stir the hot water and the reagent to generate a mixed liquid.

In addition, in the present exemplary embodiment, the first thermal insulation part 240 is positioned outside or inside the mixing tank 210 to maintain a constant temperature of the mixing tank 210. An indirect heating device by oil circulation heated by the first heat insulating part 240 is used. To this end, the first heat insulating part 240 includes a circulation pipe through which the heated oil circulates. It is effective that the circulation pipe is disposed on the outer circumferential surface or the inner circumferential surface of the mixing tank 210. Of course, various fluids may be used instead of the oil. The first heat insulating part 240 is provided with oil heated from the heat insulating part 500.

The mixing tank 210 is a dual structure is provided with a coil (spring type) inside.

When the third control signal is generated by the automatic controller 700, the mixed solution control valve 250 operates to provide the mixed solution to the corrosion tank unit 300 through a pipe.

The corrosion tank 300 includes a corrosion tank 310 for corroding the specimen using the mixed solution, and a second heat insulating part 320 for maintaining a constant temperature of the mixed solution in the corrosion tank 310.

The corroding tank 310 has a square model made of steel. In addition, the lower part has a double structure in which a pipe (that is, a coil) of the second heat insulating part 320 is disposed at the lower part. An indirect heating device by oil circulation heated by the second heat insulating part 320 is used.

The specimen is disposed inside the corroding tank 310, and the mixed solution is provided to the corroding tank 310. Through this it is possible to corrode the specimen using the mixed solution of the corrosion tank 310. Corrosion of the specimens in this way can result in the organization of the specimens.

In this embodiment, as shown in FIG. 3, the brush unit 400 is disposed above the erosion tank unit 300. In addition, the brush unit 400 may move back and forth within the corrosion tank unit 300 according to the fifth control signal to uniformly corrode the specimen.

As shown in FIGS. 2, 3, and 6, the brush part 400 includes a moving frame 410 reciprocating from the upper side of the corroding tank 310 in the front-rear direction, and both edges of the moving frame 410. Drive wheel unit 420 is installed and coupled to the reciprocating motion in the front and rear direction, the belt 430 connected to the assembled side of the drive wheel 420 and at least one brush coupled to the moving frame 410 ( 440.

By the brush unit 400, the brush 440 reciprocates at a uniform speed and a uniform interval in the front and rear directions in the corroding tank 310 to prevent local corrosion of the specimen.

The moving frame 410 extends in one direction of the corroding vessel 310 as shown in FIG. 6. In addition, grooves are engraved in the moving frame 410 at regular intervals in the longitudinal direction. At least one brush 440 is bolted through the groove. Of course, a plurality of grooves may be provided in the vertical direction, and the height of the brush 440 may also be adjusted.

The driving wheel part 420 is disposed on opposite sides of the upper side of the corrosion tank 310. In addition, the driving wheel unit 420 is coupled to both ends of the moving frame 410. The drive wheel part 420 includes a wheel and a motor for rotating the wheel.

The motor of the driving wheel part 420 receives power from the belt 430. At this time, the driving wheel part 420 moves in the front-rear direction according to the rotational speed and the rotational direction of the motor.

That is, the driving wheel part 420 moves in the front-rear direction at both upper edges of the corrosion tank part 300 by the fifth control signal. At this time, the moving frame 410 is moved in the front and rear direction according to the moving direction of the drive wheel 420. As a result, the brush 440 coupled to the moving frame 410 may move in the front-rear direction from the upper side of the specimen.

Of course, the brush unit 400 is not limited to the above-described structure, various structures are possible. That is, the brush unit 400 is provided with a moving frame 410 coupled to the brush 440, as shown in Figure 3, the upper edge of the erosion tank 300, respectively coupled to both ends of the moving frame It may be provided with a conveyor belt mounted, and a rotating means for rotating the conveyor belt. At this time, when the conveyor belt moves in the front and rear direction, the moving frame 410 coupled thereto is also moved in the front and rear direction. Therefore, the brush 440 mounted to the moving frame 410 moves in the front and rear direction inside the corroding tank 310.

In this embodiment, by measuring the temperature of the mixed liquid in the mixing tank 210, according to the temperature of the mixed liquid in the corrosion tank 310, by providing the high-temperature fluid (that is, oil) by the sixth control signal generated It is provided with a heat insulating part 500 for maintaining a constant temperature of the mixed liquid in the mixing tank 210 and the corrosion tank 310.

As shown in FIGS. 2 and 7, the heat keeping part 500 includes a heating tank 510 for heating oil, a pump 520 for discharging the heated oil to the outside, and oil of the pump 520. The first oil control valve 530 is provided to the first heat insulating part 240 to circulate oil in the first heat insulating part 240, and the oil of the pump 520 is provided to the second heat insulating part 320. And a second oil control valve 540 for circulating oil in the second heat insulating part 320.

The first and second oil control valves 530 and 540 drive (ie, open and close) according to a sixth control signal (thermal control signal). At this time, the heating tank 510 is preferably maintained about 5 to 20% higher than the temperature of the oil mixture temperature. This is because in the present embodiment, the mixed liquid in the mixing tank 210 and the corrosion tank 310 is kept constant by indirect heating.

In addition, the present embodiment includes a drain tank 600 for draining the mixed liquid in the corrosion tank 310 of the corrosion tank 300.

The drain tank unit 600 includes a drain tank 610 for corroding the specimen and storing the mixed liquid, and a drain control valve 620 for communicating the drain tank 610 and the corrosion tank 310. At this time, the drain control valve 620 is opened and closed in accordance with the seventh control signal to communicate between the drain tank 610 and the corrosion tank 310. Through this, the mixed liquid in the corrosion tank 310 is moved toward the drain tank 610 to drain the mixed liquid in the corrosion tank 310.

In this embodiment, the automatic control unit 700 is provided to generate various signals other than the first to seventh control signals, and thus, the hot water supply unit 100, the reagent mixing unit 200, the corrosion tank unit 300, and the brush unit 400. ), The heat insulating part 500 and the drain tank part 600 are controlled.

The automatic control unit 700 includes a control panel for generating first to seventh control signals according to a user's operation as shown in FIG. 8. In this case, the control panel receives a user's operation signal in the form of a touch pad.

The control panel includes a hot water display unit and a mixing tank hot water valve display unit corresponding to the hot water supply unit 100, a mixing tank display unit, a stirrer display unit, and a plurality of reagent display units corresponding to the reagent mixing unit 200. A corrosion tank display unit corresponding to the corrosion tank unit 300 is provided. In addition, a brush start display unit corresponding to the brush unit 400 is provided, and a heating tank display unit and a circulation pump display unit corresponding to the thermal insulation unit 500 are provided, and a waste acid tank display unit corresponding to the drain tank unit 600 is provided. And a valve indicator. Although not shown, a main processor may be provided to generate a plurality of control signals according to the signals input from the control panel.

Therefore, when the user touches the corresponding display unit of the control panel, the automatic controller 700 provides the corresponding control signal to the corresponding unit. For example, when the user touches the mixing tank hot water valve display, the first control signal is generated. At this time, the hot water control valve 130 is opened by the generated first control signal to provide hot water to the mixing tank 210 of the reagent mixing unit 200. Here, the hot water control valve 130 is automatically shielded when a predetermined amount of hot water is provided. This can be controlled by opening the hot water control valve 130 only in a section in which the pulse type first control signal is provided to the hot water control valve 130 by the automatic controller 700 and the pulse is logic high.

Then, the specimen display corrosion apparatus of the present embodiment is provided with a washing table shown in FIG. At this time, the rinsing vessel is cleaned using cold water to be washed, and the eroded specimen is cleaned inside the eroding vessel. At this time, the operation of the washing table is also performed by the eighth control signal of the automatic controller 700.

In the following, a specimen display corrosion method using the specimen display corrosion apparatus having the above-described configuration will be described.

9 is a flowchart illustrating a corrosion method for specimen display according to an embodiment of the present invention.

8 and 9, first, hot water is prepared using the hot water tank 110 (S110). Cold water is opened by the cold water control signal of the automatic controller 700 to supply cold water to the hot water tank 110. Next, cold water in the hot water tank 110 is heated. At this time, when the temperature inside the hot water tank 110 is below a predetermined temperature, it is preferable to automatically operate the heating means 120 to heat the internal hot water.

Next, the hot water and the reagent of the hot water tank 110 are mixed in the mixing tank by the mixing signal of the automatic control unit 700 (S120). That is, the hot water of the hot water tank 110 is supplied to the mixing tank 210 by the first control signal of the automatic controller 700. In this case, the reagent may also be provided to the mixing tank 210 by the reagent supply unit 230. Thereafter, the stirrer 220 inside the mixing tank 210 is operated by the second control signal to stir the hot water and the reagent.

Here, when the temperature of the mixing tank 210 is 70 degrees or less, the mixed liquid inside the mixing tank 210 may be heated by the first heat insulating part 240.

Subsequently, according to the corrosion signal of the automatic control unit 700, the mixed solution is provided inside the corroding tank 310 in which the specimen is accommodated (S130). That is, the mixed solution control valve 250 is opened by the third control signal of the automatic control unit 700 so that the mixed solution flows into the corrosion tank 310.

Subsequently, in response to the brush signal of the automatic control unit 700, the brush 440 on the upper side of the specimen reciprocates in the front-rear direction (S140). In other words, the specimen surface brushing is performed.

That is, the driving wheel part 420 of the brush part 400 is reciprocated in the front-rear direction according to the fifth control signal of the automatic controller 700. Through this, the moving frame 410 on which the brush 440 is assembled is moved in the front and rear direction. Thus, it is possible to brush the specimen surface at uniform intervals and uniform speeds. At this time, the process conditions of the brushing process of the specimen surface may be adjusted according to the value set in the automatic control unit 700. For example, the number of round trips and the round trip time of the brush 400 may be adjusted.

In this case, when the temperature of the corrosion tank 310 is 70 degrees or less, the mixed solution inside the corrosion tank 110 may be heated by the second heat insulating part 320. The automatic control unit 700 detects the temperature of the mixed tank 210 and the mixed solution inside the corrosion tank 310. When the detected temperature is lower than the above range, the mixed solution heating signal is provided to the heat insulation part 500. At this time, the thermal insulation unit 500 operates to provide heated oil (ie, fluid) to the first and second thermal insulation units 240 and 320 to heat the mixed liquid.

Corrosion of the specimen as described above to reveal the tissue and then the mixed solution in the corrosion tank 310 is discharged to the drain tank 610 according to the drain signal of the automatic control unit 700 (S150). And, at this time, the corrosion tank 310 may be washed by the washing means. Then, the mixed liquid collected in the drain tank 610 is discarded.

As described above, in this embodiment, the specimen display corrosion process may be automated according to the control signals of the automatic controller 700. This saves time and manpower. That is, the corrosion process as described in the background art took a total of 85 minutes. When the entire corrosion process is separated into a corrosion preparation step, a corrosion step, and a reagent disposal step, the corrosion preparation step takes about 31 minutes, the corrosion step takes about 36 minutes, and the reagent disposal step takes about 18 minutes. .

However, in this embodiment, this time can be reduced to 38 minutes. That is, the corrosion preparation step took about 10 minutes, the corrosion step took about 20 minutes, and the reagent disposal step took about 8 minutes. This can shorten the time by preparing the hot water in the automated process by the automatic control, and by maintaining a constant temperature inside the mixing tank and the corrosion tank.

Although the invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the invention is not limited thereto, but is defined by the claims that follow. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the spirit of the following claims.

1 is a process photograph for explaining a conventional specimen surface corrosion process.

Figure 2 is a block conceptual view of the corrosion apparatus for specimen appearance in accordance with an embodiment of the present invention.

3 is a perspective conceptual view of a partial region of a specimen display corrosion apparatus according to an embodiment;

4 is a photograph of a hot water tank according to one embodiment.

5 is a photograph of a mixing tank according to one embodiment.

6 is a photograph of a brush part according to one embodiment.

7 is a photograph of a heating bath according to an embodiment.

8 is a photograph of a control panel of an automatic controller according to an embodiment.

9 is a flow chart illustrating a corrosion method for specimen display according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: hot water supply unit 110: hot water tank

200: reagent mixing unit 210: mixing tank

220: stirrer 310: corrosion tank

400: brush portion 410: moving frame

420: driving wheel portion 440: brush

500: heat insulation unit 510: heating tank

610: drainage tank 700: automatic control

Claims (10)

Hot water supply unit for storing hot water; A reagent mixing unit mixing the hot water and the reagent according to a mixing signal; Corrosion tank to corrode the specimen by receiving the mixed solution in accordance with the corrosion signal; A brush unit for brushing the specimen surface according to a brush signal; And And a control unit for generating the mixed signal, the corrosion signal, and the brush signal according to a user input. The method according to claim 1, A heat insulating part for maintaining a constant temperature of the mixed liquid in the reagent mixing part and the corrosion tank part; And a drainage tank part for draining the mixed solution provided to the erosion tank part according to the drainage signal of the automatic controller. The method according to claim 2, The heat retaining unit includes a heating tank for heating a fluid, a pump for providing the heated fluid to the reagent mixing unit and the corrosion tank, and the reagent mixing unit, the pump, and the corrosion tank according to a thermal control signal of the automatic controller. A specimen display corrosion device comprising first and second oil control valves to open and close between pumps. The method according to claim 1, The hot water supply unit is a hot water tank receiving cold water and storing the heated hot water, heating means for heating the water in the hot water tank, and hot water control for providing hot water of the hot water tank to the reagent mixing unit according to the mixing signal. Corrosion device for specimen display including a valve. The method according to claim 1, wherein the reagent mixing unit, A mixing tank receiving hot water and a reagent according to the mixing signal; An agitator for stirring hot water and reagents in the mixing tank according to the mixing signal; A reagent supply unit for providing a reagent to the mixing tank; A first heat insulating part for maintaining a constant temperature of the mixing tank; And a mixed solution control valve for providing the mixed solution of the mixing tank to the eroding tank according to the corrosion signal. The method according to claim 1, The corrosion tank includes a corrosion tank for corroding the specimen using the mixed liquid, and a second insulating portion for maintaining a constant temperature of the mixed liquid in the corrosion tank. The brush part according to any one of claims 1 to 6, wherein A moving frame extending in an upper direction of the corroding part; At least one brush extending from the moving frame in the direction of the corrosion tank; And a driving wheel unit installed at both edges of the moving frame and reciprocating in the front and rear directions according to the brush signal. The brush unit according to any one of claims 1 to 6, wherein A moving frame extending in an upper direction of the corroding part; At least one brush extending from the moving frame in the direction of the corrosion tank; Conveyor belts provided at both upper edges of the corroding tank unit and coupled to both ends of the moving frame, respectively, Corrosion apparatus for specimens including a moving means for moving the conveyor belt in the front and rear direction. Preparing the hot water; Mixing the warm water and a reagent; Providing a mixed solution in the corroding vessel containing the specimen; Moving the brush above the specimen contained in the mixed liquid in the front-rear direction; And Draining the mixed liquid in the caustic bath, Each step is controlled by a signal from an automatic control. The method according to claim 9, After the step of draining the mixed solution, A method for eroding specimens, comprising washing the corroding vessel and the specimen through cleaning means.

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