An iridium-tantalum coating for a metal electrolysis anode plate and a preparation method thereof

Abstract

The present invention relates to the technical field of electrode coating preparation, and specifically, to an iridium tantalum coating for a metal electrolysis anode plate and a preparation method thereof. The raw materials thereof include: iridium acetylacetonate, 1,3-propanediol, tantalum pentoxide, and dichlorodimethylplatinum. In the present invention, grooves are formed on the surface of the metal anode plate, and then a part of the base solution is coated on the surface of the metal anode plate, so that the base solution penetrates into the grooves and forms a base film on the surface. A doped film is formed on the base film by vacuum evaporation. By virtue of the bonding property of the base film and the high adhesion provided by the grooves, the base film and the doped film are firmly bonded to the surface of the metal anode plate. Then, the carboxyl functional group in 1,3-propanediol in the remaining base solution cross-links with dichlorodimethylplatinum to improve the corrosion resistance and wear resistance of the coating and improve the bonding force between the coating and other materials, generating an iridium tantalum coating with strong adhesion, avoiding the shedding of the coating to ensure the corrosion resistance of the anode plate.

Description

Technical Field

[0001] The present invention relates to the technical field of electrode coating preparation, and more specifically, to an iridium-tantalum coating for a metal electrolysis anode plate and a preparation method thereof. Background Art

[0002] As an electrode with a positive potential polarization, a metal electrolysis anode plate allows current to enter the solution through it, initiating and promoting the required chemical reactions. Through the electrolysis reaction, the metal is maintained at a stable potential, thereby slowing down or preventing metal polarization and corrosion and promoting the progress of the electrochemical reaction.

[0003] To improve the corrosion resistance of the anode plate, the surface coating of the anode plate is generally coated with a material with strong corrosion resistance. For example, CN113584441B involves a metal bipolar plate coating and a preparation method thereof, which adopts a structural design of a substrate, an underlayer, an antioxidant layer, and a noble metal doped layer. The underlayer is deposited on the substrate, the antioxidant layer is deposited on the underlayer, and the noble metal doped layer is deposited on the antioxidant layer. The main components of the underlayer are titanium and one or more of chromium, nickel, aluminum, tungsten, and niobium; the main components of the antioxidant layer are one or more of cerium, lanthanum, indium, tin, antimony, tantalum, niobium, manganese, cobalt, and nickel; the components of the noble metal doped layer are one or more of titanium, graphite, or doped noble metals ruthenium, iridium, platinum, gold, and silver. The prepared metal bipolar plate has good electrical conductivity and strong corrosion resistance.

[0004] In the coating and preparation method of the above patent, the colloid is evenly dispersed, the surface particles of the finished product are uniform, the number of active sites on the surface increases, and the electrocatalytic activity of the titanium anode is improved to a certain extent. However, the adhesion strength between the coating and the anode plate is not improved, resulting in the coating being prone to peeling during actual use, thereby affecting the corrosion resistance of the anode plate.

[0005] In order to avoid the peeling of the coating to ensure the corrosion resistance of the anode plate, an iridium-tantalum coating for a metal electrolysis anode plate and a preparation method thereof are proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide an iridium-tantalum coating for a metal electrolysis anode plate and a preparation method thereof to solve the problems raised in the above background art.

[0007] To achieve the above purpose, one of the purposes of the present invention is to provide an iridium-tantalum coating for a metal electrolysis anode plate, including the following raw materials in parts by weight:

[0008] 15 - 19 parts by weight of iridium acetylacetonate, 5 - 8 parts by weight of 1,3-propanediol, 22 - 30 parts by weight of tantalum pentoxide, 3 - 7 parts by weight of dichlorodimethylplatinum.

[0009] Another object of the present invention is to provide a method for preparing an iridium tantalum coating for a metal electrolytic anode plate, comprising the following steps:

[0010] S1. After surface pretreatment of the metal anode plate, the metal anode plate is placed in a fixing machine and grooved by a surface treatment machine;

[0011] S2. Take 1,3-propanediol and mix it with water to make a base liquid. Coat part of the base liquid on the surface of the metal anode plate, and form a base film after cooling and solidification;

[0012] S3. Mix the remaining base liquid with iridium acetylacetonate, tantalum pentoxide, and dichlorodimethylplatinum to make a reaction liquid, and deposit the reaction liquid on the base film by vacuum evaporation to form a doped film;

[0013] S4. Extrude the doped film layer to reduce the thickness of the surface coating of the metal anode plate, and cut off the deformed and overflowing material to complete the coating preparation.

[0014] As a further improvement of this technical solution, in S1, the surface pretreatment is to clean the surface of the metal anode plate by ultrasonic cleaning, and the depth range of the grooves formed during the grooving process is 0.17 - 0.50 mm.

[0015] As a further improvement of this technical solution, in S1,

[0016] The fixing machine includes a fixing table for placing the metal anode plate, and a fixing structure for fixing the metal anode plate is arranged on the fixing table;

[0017] The surface treatment machine includes a grooving body and a gas blowing body connected to the grooving body. The grooving body and the gas blowing body are both slidably connected to the fixing table. The grooving body is used to groove the metal anode plate, and the gas blowing body is used to blow away the debris generated during grooving. Place the metal anode plate after surface pretreatment on the fixing table, fix the metal anode plate through the fixing structure, the grooving body slides along the fixing table to groove the metal anode plate, and the gas blowing body uses the movement of the grooving body to inhale gas and then blow the gas onto the surface of the metal anode plate to remove the debris generated during grooving.

[0018] As a further improvement of this technical solution, the grooving body includes a top plate and a cross bar that is inserted and cooperated with the top plate. A grooving milling cutter for grooving the surface of the metal anode plate is provided at the bottom of one end of the top plate. A third screw and a first motor for driving the third screw are arranged on the cross bar. The third screw passes through the top plate and is threadedly connected to the top plate. The fixing structure includes a fixing frame that is slidably connected to the fixing table. One end of the fixing frame is threadedly connected to a first screw, and the first screw is rotatably connected to the fixing table. First displacement grooves are opened at the top of both ends of the fixing table, and both ends of the cross bar are slidably connected to the first displacement grooves. A second screw and a second motor for driving the second screw are arranged at one end of the top of the fixing table, and the second screw is threadedly connected to the air blowing body.

[0019] As a further improvement of this technical solution, second displacement grooves are opened on the inner walls of both ends of the fixing table. The air blowing body includes a control board and a wind guiding board arranged at the bottom end of the control board. Both ends of the control board are slidably connected to the second displacement grooves. Both ends of the bottom of the cross bar are inserted and cooperated with the control board. A first tail hook is provided at one end of the top plate away from the grooving milling cutter. An empty groove is opened on the control board, and a sliding plate is slidably connected to the middle of the empty groove. The top of the sliding plate is slidably connected to the first tail hook. Air bags are connected to both ends of the sliding plate in the empty groove, and the other ends of the air bags are connected to the sliding plate. An air inlet pipe for controlling the unidirectional inflow of gas into the air bag is provided at the top of one end of the air bag, and an air outlet pipe for controlling the unidirectional outflow of gas from the air bag is provided at the bottom of one end of the air bag. The air outlet pipe is communicated with the wind guiding board.

[0020] As a further improvement of this technical solution, a coupling is provided at the bottom of the top plate, and a second tail hook is provided at the bottom of the control board. The control board is rotatably connected to the wind guiding board through the provided second tail hook. An air outlet for blowing out air flow is opened on the wind guiding board, and the air outlet is communicated with the air outlet pipe through the provided hose. A connecting frame is provided at the top end of the wind guiding board, and the connecting frame is slidably connected to the coupling.

[0021] As a further improvement of this technical solution, in S2, when coating the base liquid, the grooves are first filled, and then a base film with a uniform thickness is formed on the surface of the metal anode plate, and the thickness range of the base film is 0.40 - 1.20 mm.

[0022] As a further improvement of this technical solution, in S3, the substrate distance range during vacuum evaporation is 20 - 30 cm.

[0023] As a further improvement of this technical solution, in S4, the unit pressure value range during extrusion is 4 - 9 mN / m.

[0024] Compared with the prior art, the beneficial effects of the present invention:

[0025] 1. In the iridium-tantalum coating for a metal electrolytic anode plate and its preparation method, grooves are formed on the surface of the metal anode plate, and then a part of the base solution is coated on the surface of the metal anode plate, so that the base solution penetrates into the grooves and forms a base film on the surface. A doped film is formed on the base film by vacuum evaporation. By using the bonding property of the base film and the high adhesion provided by the grooves, the base film and the doped film are firmly bonded to the surface of the metal anode plate. Then, the carboxyl functional group in 1,3-propanediol in the remaining base solution cross-links with dichlorodimethylplatinum to improve the corrosion resistance and wear resistance of the coating and improve the bonding force between the coating and other materials, generating an iridium-tantalum coating with strong adhesion, avoiding the shedding of the coating to ensure the corrosion resistance of the anode plate.

[0026] 2. In the iridium-tantalum coating for a metal electrolytic anode plate and its preparation method, the metal anode plate is fixed by a fixing structure. The grooving body slides along the fixing table to groove the metal anode plate. The air blowing body inhales gas by the movement of the grooving body and then blows the gas onto the surface of the metal anode plate to remove the debris generated during grooving, thereby ensuring the grooving effect on the surface of the metal anode plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a flowchart of the present invention;

[0028] Figure 2 is an overall sectional structure diagram of the present invention;

[0029] Figure 3 is a split structure diagram of the fixing machine of the present invention;

[0030] Figure 4 is a structure diagram of the surface treatment machine of the present invention;

[0031] Figure 5 is a structure diagram of the grooving body of the present invention;

[0032] Figure 6 is a split structure diagram of the air blowing body of the present invention;

[0033] Figure 7 is a schematic diagram of the top plate controlling gas flow of the present invention;

[0034] Figure 8 is a schematic diagram of the cooperation structure of the top plate and the air guiding plate of the present invention;

[0035] Figure 9 is the adhesion strength test of the present invention Figure 1 ;

[0036] Figure 10 is the adhesion strength test of the present invention Figure 2 .

[0037] The meanings of the various labels in the figure are as follows:

[0038] 1. Fixing machine; 11. Fixing table; 111. First displacement groove; 112. Second displacement groove; 12. Fixing frame; 121. First screw; 13. Second screw;

[0039] 2. Surface treatment machine; 21. Ditching body; 211. Top plate; 212. Cross bar; 213. Grooving milling cutter; 214. Vertical bar; 215. Third screw; 216. First tail hook; 217. Coupling; 22. Air blowing body; 221. Control board; 2211. Sliding plate; 2212. Airbag; 2213. Second tail hook; 222. Air guiding plate; 2221. Air outlet; 2222. Hose; 2223. Connecting frame. Specific implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0043] Embodiment 1

[0044] One of the purposes of this embodiment is to provide an iridium-tantalum coating for a metal electrolysis anode plate, which includes 15 parts by weight of iridium acetylacetonate, 8 parts by weight of 1,3-propanediol, 22 parts by weight of tantalum pentoxide, and 7 parts by weight of dichlorodimethylplatinum.

[0045] Please refer toFigure 1 As shown in Figure 1 , the second objective of this embodiment is to also provide a method for preparing an iridium-tantalum coating for the metal electrolytic anode plate described above. The specific steps are as follows:

[0046] S1. Clean the surface of the metal anode plate by ultrasonic cleaning to remove surface grease and other impurities. Place the metal anode plate in the fixing machine 1 and perform grooving treatment through the surface treatment machine 2. The depth range of the grooves formed during the grooving treatment is 0.17 mm;

[0047] S2. Take 8 parts by weight of 1,3-propanediol and mix it with water to make a base liquid. Coat a part (less than one-third) of the base liquid on the surface of the metal anode plate. After cooling and curing, a base film is formed. It should be noted that when coating the base liquid, first fill the grooves, and then form a base film with a uniform thickness on the surface of the metal anode plate. The thickness of the base film, that is, the height difference from the lowest point of the groove to the highest point of the base film, ranges from 1.20 mm;

[0048] S3. Mix the remaining base liquid with 15 parts by weight of iridium acetylacetonate, 22 parts by weight of tantalum pentoxide, and 7 parts by weight of dichlorodimethylplatinum to make a reaction liquid. Deposit the reaction liquid on the base film by vacuum evaporation to form a doped film. The substrate distance range during vacuum evaporation is 20 cm;

[0049] S4. After extruding the doped film layer to reduce the surface coating thickness of the metal anode plate, cut off the deformed and overflowed materials to complete the coating preparation. The unit pressure value range during extrusion is 9 mN / m.

[0050] In the present invention, after the surface of the metal anode plate is treated, grooves are formed on the surface to reduce the surface smoothness. Then, a part of the base liquid is coated on the surface of the metal anode plate, so that the base liquid penetrates into the grooves and forms a base film on the surface. A doped film is formed on the base film by vacuum evaporation. Utilizing the cross-linking characteristics of the carboxyl functional groups of 1,3-propanediol in the base film and the high adhesion provided by the grooves, the base film and the doped film are firmly bonded to the surface of the metal anode plate. The main components of the doped film are iridium acetylacetonate and tantalum pentoxide. Iridium acetylacetonate has a high melting point and a low oxygen permeability, can remain stable in high-temperature and strongly oxidizing environments, and can resist corrosion. Tantalum pentoxide has high chemical stability. Then, the carboxyl functional groups in 1,3-propanediol in the remaining base liquid are cross-linked with dichlorodimethylplatinum to improve the corrosion resistance and wear resistance of the coating and improve the bonding force between the coating and other materials, generating an iridium-tantalum coating with strong adhesion and avoiding the shedding of the coating to ensure the corrosion resistance of the anode plate.

[0051] Example 2

[0052] One of the purposes of this embodiment is to provide an iridium-tantalum coating for a metal electrolytic anode plate, which includes 18 parts by weight of iridium acetylacetonate, 6 parts by weight of 1,3-propanediol, 26 parts by weight of tantalum pentoxide, and 5 parts by weight of dichlorodimethylplatinum.

[0053] Another purpose of this embodiment is to further provide a preparation method for the iridium-tantalum coating for the metal electrolytic anode plate described above. The specific steps are as follows:

[0054] S1. Clean the surface of the metal anode plate by ultrasonic cleaning to remove surface grease and other impurities. Place the metal anode plate in the fixing machine 1 and perform grooving treatment through the surface treatment machine 2. The depth range of the grooves formed during the grooving treatment is 0.34 mm.

[0055] S2. Take 6 parts by weight of 1,3-propanediol and make it into a base solution with water. Coat a part (less than one-third) of the base solution on the surface of the metal anode plate, and form a base film after cooling and solidification. It should be noted that when coating the base solution, first fill the grooves, and then form a base film with a uniform thickness on the surface of the metal anode plate. The thickness of the base film, that is, the height difference from the lowest point of the groove to the highest point of the base film, ranges from 0.80 mm.

[0056] S3. Mix the remaining base solution with 18 parts by weight of iridium acetylacetonate, 26 parts by weight of tantalum pentoxide, and 5 parts by weight of dichlorodimethylplatinum to make a reaction solution, and coat the reaction solution on the base film by vacuum evaporation to form a doped film. The range of the substrate distance during vacuum evaporation is 25 cm.

[0057] S4. After extruding the doped film layer to reduce the thickness of the coating on the surface of the metal anode plate, cut off the deformed and overflowed materials to complete the preparation of the coating. The range of the unit pressure value during extrusion is 6 mN / m.

[0058] Example 3

[0059] One of the purposes of this embodiment is to provide an iridium-tantalum coating for a metal electrolytic anode plate, which includes 19 parts by weight of iridium acetylacetonate, 5 parts by weight of 1,3-propanediol, 30 parts by weight of tantalum pentoxide, and 3 parts by weight of dichlorodimethylplatinum.

[0060] Another purpose of this embodiment is to further provide a preparation method for the iridium-tantalum coating for the metal electrolytic anode plate described above. The specific steps are as follows:

[0061] S1. Clean the surface of the metal anode plate by ultrasonic cleaning to remove surface grease and other impurities. Place the metal anode plate in the fixing machine 1 and perform grooving treatment through the surface treatment machine 2. The depth range of the grooves formed during the grooving treatment is 0.50 mm.

[0062] S2. Take 5 parts by weight of 1,3 - propanediol and make it into a base solution by adding water. Coat a part (less than one - third) of the base solution on the surface of the metal anode plate, and form a base film through cooling and solidification. It should be noted that when coating the base solution, first fill the grooves, and then form a base film with a uniform thickness on the surface of the metal anode plate. The thickness of the base film, that is, the height difference from the lowest point of the groove to the highest point of the base film, ranges from 0.40 mm.

[0063] S3. Mix the remaining base solution with 19 parts by weight of iridium acetylacetonate, 30 parts by weight of tantalum pentoxide, and 3 parts by weight of platinum dichloride dimethyl to make a reaction solution, and coat the reaction solution on the base film by vacuum evaporation to form a doped film. The range of the substrate distance during vacuum evaporation is 30 cm.

[0064] S4. After extruding the doped film layer to reduce the thickness of the coating on the surface of the metal anode plate, cut off the deformed and overflowed materials to complete the preparation of the coating. The range of the unit pressure value during extrusion is 4 mN / m.

[0065] Table 1 Comparison of raw material dosages in Examples 1 - 3

[0066] Example 1 Example 2 Example 3 Iridium acetylacetonate / part 15 18 19 1,3 - propanediol / part 8 6 5 Tantalum pentoxide / part 2 26 30 Platinum dichloride dimethyl / part 7 5 3

[0067] Table 2 Comparison of process parameters in Examples 1 - 3

[0068] Example 1 Example 2 Example 3 Groove depth / mm 0.17 0.34 0.50 Substrate film thickness / mm 1.20 0.80 0.40 Substrate distance / cm 20 25 30 Unit pressure value / (mN / m) 9 6 4

[0069] Prepare an iridium - tantalum coating on the metal electrolytic anode plate according to Examples 1 - 3, and test the adhesion strength of the iridium - tantalum coating through "GBT9286 - 1998 Cross - cut test for paints and varnishes". The test results are recorded in Table 3 (the test results are divided into levels 0 - 5, where level 0 means the coating is intact and level 5 means the coating is severely damaged).

[0070] Table 3 Comparison of adhesion strengths of iridium - tantalum coatings prepared in Examples 1 - 3

[0071] Example 1 Example 2 Example 3 Adhesion strength grade 2 1 2

[0072] It can be seen from Table 3 that the iridium - tantalum coatings prepared in Examples 1 - 3 all have good adhesion strengths. Compared with Example 1 and Example 3, the adhesion strength of the iridium - tantalum coating in Example 2 is higher, and its adhesion strength level reaches level 1.

[0073] Example 4

[0074] Please refer to Figure 2 、 Figure 3 、 Figure 4 As shown, this example provides the fixing machine 1 and the surface treatment machine 2 involved in the above examples. Among them,

[0075] The fixing machine 1 includes a fixing table 11 for placing the metal anode plate, and a fixing structure for fixing the metal anode plate is arranged on the fixing table 11;

[0076] The surface treatment machine 2 includes a grooving body 21 and a gas blowing body 22 connected to the grooving body 21. The grooving body 21 and the gas blowing body 22 are both slidably connected to the fixing table 11. The grooving body 21 is used for grooving the metal anode plate, and the gas blowing body 22 is used for blowing away the debris generated during grooving. Place the metal anode plate after surface pretreatment on the fixing table 11, fix the metal anode plate through the fixing structure, the grooving body 21 slides along the fixing table 11 to groove the metal anode plate, and the gas blowing body 22 inhales gas by the movement of the grooving body 21 and then blows the gas onto the surface of the metal anode plate to remove the debris generated during grooving.

[0077] As Figure 2 、 Figure 3 、 Figure 5 shown, the grooving body 21 includes a top plate 211 and a cross bar 212 inserted and matched with the top plate 211. A grooving milling cutter 213 for grooving the surface of the metal anode plate is arranged at the bottom of one end of the top plate 211. A third screw 215 and a first motor for driving the third screw 215 are arranged on the cross bar 212. The third screw 215 passes through the top plate 211 and is threadedly connected with the top plate 211. The fixing structure includes a fixing frame 12 slidably connected to the fixing table 11. One end of the fixing frame 12 is threadedly connected with a first screw 121, and the first screw 121 is rotatably connected to the fixing table 11. First displacement grooves 111 are opened at the top of both ends of the fixing table 11. Both ends of the cross bar 212 are located in the first displacement grooves 111 and are slidably connected with the first displacement grooves 111. A second screw 13 and a second motor for driving the second screw 13 are arranged at one end of the top of the fixing table 11. The second screw 13 is threadedly connected with the gas blowing body 22. After placing the metal anode plate on the fixing table 11, rotate the first screw 121 threadedly connected with the fixing frame 12 to drive the fixing frame 12 to move on the fixing table 11 to contact the metal anode plate. The metal anode plate is fixed under the extrusion of the fixing frame 12 and the inner wall of the fixing table 11. The second motor drives the second screw 13 to rotate, so that the second screw 13 drives the gas blowing body 22, and further drives the grooving body 21 to slide along the first displacement groove 111, so that the grooving milling cutter 213 approaches and grooves the surface of the metal anode plate. And when grooving, the first motor drives the top plate 211 to slide left and right along the cross bar 212 through the third screw 215, so that the grooving milling cutter 213 cuts a number of connected "Z"-shaped grooves on the surface of the metal anode plate. By opening the "Z"-shaped grooves, the iridium-tantalum coating can have good adhesion performance in multiple directions.

[0078] As Figure 5 、 Figure 6As shown in the figure, second displacement grooves 112 are formed in the inner walls at both ends of the fixed table 11. The air blowing body 22 includes a control board 221 and a wind guiding board 222 arranged at the bottom end of the control board 221. Both ends of the control board 221 are slidably connected to the second displacement grooves 112. The third screw 215 passes through one end of the control board 221. Vertical rods 214 that are inserted and matched with the control board 221 are provided at the bottoms of both ends of the cross bar 212. A first tail hook 216 is provided at one end of the top plate 211 away from the grooving cutter 213. An empty groove is formed in the control board 221. A sliding plate 2211 is slidably connected to the middle of the empty groove. The top of the sliding plate 2211 is slidably connected to the first tail hook 216. Air bags 2212 are connected to both ends of the sliding plate 2211 in the empty groove. The other ends of the air bags 2212 are connected to the sliding plate 2211. An air inlet pipe for controlling the unidirectional inflow of gas into the air bag 2212 is provided at the top of the end of the air bag 2212 away from the sliding plate 2211. An air outlet pipe for controlling the unidirectional outflow of gas from the air bag 2212 is provided at the bottom of the end of the air bag 2212 away from the sliding plate 2211. The air outlet pipe is communicated with the wind guiding board 222. As Figure 7 shown, when the first motor drives the top plate 211 to slide left and right along the cross bar 212 through the third screw 215 during ditching, the top plate 211 causes the sliding plate 2211 to slide through the first tail hook 216, compressing or stretching the air bag 2212. When the air bag 2212 is stretched, it inhales air from the air inlet pipe. When the air bag 2212 is compressed, the internal gas blows out through the air outlet pipe and then through the wind guiding board 222 to clean the debris. The gas flow direction is as Figure 7 shown by the solid line arrow in the figure.

[0079] To ensure the debris removal effect, as Figure 5 、 Figure 6 、 Figure 8 shown, a coupling 217 is provided at the bottom of the top plate 211. A second tail hook 2213 is provided at the bottom of the control board 221. The control board 221 is rotatably connected to the wind guiding board 222 through the provided second tail hook 2213. An air outlet 2221 for blowing out air flow is formed in the wind guiding board 222. The air outlet 2221 is communicated with the air outlet pipe through the provided hose 2222. A connecting frame 2223 is provided at the top end of the wind guiding board 222. The connecting frame 2223 is slidably connected to the coupling 217. By setting the rotatable connection method, when the top plate 211 slides down along the first displacement groove 111 and its height decreases, the connecting frame 2223 connected by sliding can drive the wind guiding board 222 to rotate relative to the control board 221 through the coupling 217, so that the air outlet 2221 always aims at the contact position between the grooving cutter 213 and the metal anode plate, thereby ensuring that the blown air flow can blow away the debris generated during ditching.

[0080] Embodiment 5

[0081] 1,3 - propanediol, as an auxiliary material in the iridium - tantalum coating, can adjust the viscosity and fluidity of the material, affect the drying and curing processes of the material, help form a film layer with a smooth surface to improve the structural strength of the coating. Dichlorodimethylplatinum can provide platinum elements, enhance the corrosion resistance of the coating, and dichlorodimethylplatinum can play a catalytic role in the coating preparation, helping the material to form a dense and uniform coating structure, thereby ensuring the adhesion performance of the coating.

[0082] To determine that 1,3 - dipropanol and dichlorodimethylplatinum are one of the important components to ensure the adhesion performance of the iridium - tantalum coating, based on Example 2, only one or more of 1,3 - dipropanol or dichlorodimethylplatinum are missing, or 1,3 - dipropanol and dichlorodimethylplatinum are replaced with epoxy resin. The iridium - tantalum coating is prepared on the metal electrolytic anode plate, and the adhesion strength of the iridium - tantalum coating is tested according to "GB / T5210 - 2006 Paints and varnishes - Pull - off test for adhesion". The test results are as Figure 9 shown.

[0083] It can be Figure 9 seen that compared with Example 2, when one or more of 1,3 - dipropanol or dichlorodimethylplatinum are missing, or 1,3 - dipropanol and dichlorodimethylplatinum are replaced with epoxy resin, the adhesion strength of the iridium - tantalum coating is significantly reduced. Therefore, 1,3 - dipropanol and dichlorodimethylplatinum are one of the important components to ensure the adhesion performance of the iridium - tantalum coating.

[0084] Example 6

[0085] Opening grooves on the surface of the metal anode plate can increase the mechanical interlocking effect between the coating and the metal substrate. This enhancement of mechanical adhesion is achieved by creating an uneven surface on the metal. The grooves can provide more anchor points, enabling the coating to grip the substrate more firmly after curing, and also contributing to an increase in the chemical bonding between the coating and the metal substrate.

[0086] To determine that the groove depth is one of the important components to ensure the adhesion performance of the iridium - tantalum coating, based on Example 2, the groove depths are set to 0.13mm, 0.25mm, 0.30mm, 0.35mm, 0.60mm. The iridium - tantalum coating is prepared on the metal electrolytic anode plate, and the adhesion strength of the iridium - tantalum coating is tested according to "GB / T 5210 - 2006 Paints and varnishes - Pull - off test for adhesion". The test results are as Figure 10 shown.

[0087] It can be Figure 10It can be known that when the groove depth is 0.13 mm or 0.60 mm, that is, when the groove depth is not 0.17 - 0.50 mm, the adhesion strength is poor. When the groove depth is 0.25 mm, 0.30 mm, or 0.35 mm, that is, when the groove depth is 0.17 - 0.50 mm, all have relatively high adhesion strength. And compared with 0.25 mm and 0.35 mm, when the groove depth is 0.30 mm, the iridium tantalum coating has a relatively high adhesion strength.

[0088] Example 7

[0089] According to the optimal raw material dosage and optimal process parameters determined in the above examples, an iridium tantalum coating is prepared on the metal electrolytic anode plate, and the adhesion strength of the iridium tantalum coating is tested according to "GBT 9286 - 1998 Cross - cut Test for Paints and Varnishes". It is measured that the adhesion strength grade of the iridium tantalum coating reaches level 1, that is, the adhesion of the iridium tantalum coating prepared under the working conditions of this example is strong, which can avoid the peeling of the coating and ensure the corrosion resistance of the anode plate.

[0090] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above - mentioned embodiments. The above - mentioned embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an iridium-tantalum coating for anode plates for metal electrolysis, characterized in that: The following steps are involved: S1, after pre-treating the surface of the metal anode plate, the metal anode plate is placed in a fixing machine (1) and subjected to a groove treatment by a surface treatment machine (2); S2, taking 5-8 parts by weight of 1,3-propylene glycol and mixing with water to prepare a base liquid, coating part of the base liquid on the surface of the metal anode plate, and cooling and solidifying to form a base film; S3, mixing the remaining base liquid with 15-19 parts by weight of iridium acetylacetonate, 22-30 parts by weight of tantalum pentoxide, and 3-7 parts by weight of dimethyl platinum dichloride to prepare a reaction solution, and coating the reaction solution on the base film by vacuum evaporation to form a doped film; S4, after squeezing the doped film layer to reduce the coating thickness on the surface of the metal anode plate, shearing off the deformed and overflowed material to complete the coating preparation; In S2, when coating the base liquid, the grooves are first filled, and then a base film with uniform thickness is formed on the surface of the metal anode plate, and the thickness of the base film ranges from 0.40 to 1.20 mm.

2. The method for preparing an iridium-tantalum coating for anode plates for metal electrolysis according to claim 1, characterized in that: In S1, the surface pretreatment is to clean the surface of the metal anode plate by ultrasonic cleaning, and the depth of the groove formed during the grooving treatment is in the range of 0.17-0.50 mm.

3. The method for preparing an iridium-tantalum coating for anode plates for metal electrolysis according to claim 1, characterized in that: In S1, The fixing machine (1) comprises a fixing table (11) for placing the metal anode plate, and a fixing structure for fixing the metal anode plate is arranged on the fixing table (11); The surface treatment machine (2) comprises a groove opening body (21) and an air blowing body (22) connected to the groove opening body (21); the groove opening body (21) and the air blowing body (22) are both slidably connected to the fixed platform (11); the groove opening body (21) is used to groove the metal anode plate; the air blowing body (22) is used to blow away debris generated during the groove opening; the groove opening body (21) slides along the fixed platform (11) to groove the metal anode plate; the air blowing body (22) uses the movement of the groove opening body (21) to inhale gas and then blows the gas toward the surface of the metal anode plate to remove debris generated during the groove opening.

4. The method for preparing an iridium-tantalum coating for anode plates for metal electrolysis according to claim 3, characterized in that: The groove opening body (21) comprises a top plate (211) and a cross bar (212) plugged into and matched with the top plate (211); a groove milling cutter (213) for groove opening on the surface of the metal anode plate is provided at the bottom of one end of the top plate (211); a third screw rod (215) and a first motor for driving the third screw rod (215) are provided on the cross bar (212); the third screw rod (215) passes through the top plate (211) and is threadedly connected to the top plate (211); the fixing structure comprises a fixing member slidably connected to the fixing platform (11); A fixed frame (12), one end of the fixed frame (12) is threadedly connected to a first screw rod (121), the first screw rod (121) is rotatably connected to the fixed platform (11), the tops of both ends of the fixed platform (11) are provided with first displacement grooves (111), both ends of the cross bar (212) are slidably connected to the first displacement grooves (111), a second screw rod (13) and a second motor for driving the second screw rod (13) are arranged at one end of the top of the fixed platform (11), and the second screw rod (13) is threadedly connected to the air blowing body (22).

5. The method for preparing an iridium-tantalum coating for anode plates for metal electrolysis according to claim 4, characterized in that: The inner walls of both ends of the fixed platform (11) are provided with second displacement grooves (112), the air blowing body (22) comprises a control plate (221) and an air guide plate (222) arranged at the bottom end of the control plate (221), both ends of the control plate (221) are slidably connected to the second displacement grooves (112), the bottoms of both ends of the cross bar (212) are plugged into the control plate (221), the top plate (211) is provided with a first tail hook (216) at one end away from the groove milling cutter (213), the control plate (221) is provided with an empty groove, and a sliding plate (216) is slidably connected to the middle of the empty groove. 211), the top of the sliding plate (2211) is slidably connected to the first tail hook (216), the airbags (2212) are connected to the two ends of the sliding plate (2211) in the empty groove, the other end of the airbag (2212) is connected to the sliding plate (2211), an air inlet pipe for controlling the unidirectional flow of gas into the airbag (2212) is provided at the top of one end of the airbag (2212), and an air outlet pipe for controlling the unidirectional flow of gas out of the airbag (2212) is provided at the bottom of one end of the airbag (2212), and the air outlet pipe is communicated with the air guide plate (222).

6. The method for preparing an iridium-tantalum coating for anode plates for metal electrolysis according to claim 5, characterized in that: A coupling shaft (217) is provided at the bottom of the top plate (211), a second tail hook (2213) is provided at the bottom of the control plate (221), the control plate (221) is rotatably connected to the air guide plate (222) via the second tail hook (2213), the air guide plate (222) is provided with an air outlet (2221) for blowing out air, the air outlet (2221) is connected to the air outlet pipe via a hose (2222), a connecting frame (2223) is provided at the top of the air guide plate (222), and the connecting frame (2223) is slidably connected to the coupling shaft (217).

7. The method for preparing an iridium-tantalum coating for anode plates for metal electrolysis according to claim 1, characterized in that: In S3, the distance between the substrate and the vacuum evaporation is in the range of 20-30 cm.

8. The method for preparing an iridium-tantalum coating for anode plates for metal electrolysis according to claim 1, characterized in that: In S4, the unit pressure value during extrusion is in the range of 4-9 mN / m.

9. An iridium-tantalum coating for anode plates of metal electrolysis obtained according to the preparation method according to any one of claims 1 to 8.

Images