CN114405794A - Preparation method of titanium electrode coating of continuous electric desalting membrane block - Google Patents
Preparation method of titanium electrode coating of continuous electric desalting membrane block Download PDFInfo
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- CN114405794A CN114405794A CN202210061604.1A CN202210061604A CN114405794A CN 114405794 A CN114405794 A CN 114405794A CN 202210061604 A CN202210061604 A CN 202210061604A CN 114405794 A CN114405794 A CN 114405794A
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- ruthenium trichloride
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 239000010936 titanium Substances 0.000 title claims abstract description 143
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 143
- 239000011248 coating agent Substances 0.000 title claims abstract description 64
- 238000000576 coating method Methods 0.000 title claims abstract description 64
- 239000012528 membrane Substances 0.000 title claims abstract description 27
- 238000011033 desalting Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 61
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 claims abstract description 33
- 229910021639 Iridium tetrachloride Inorganic materials 0.000 claims abstract description 31
- CALMYRPSSNRCFD-UHFFFAOYSA-J tetrachloroiridium Chemical compound Cl[Ir](Cl)(Cl)Cl CALMYRPSSNRCFD-UHFFFAOYSA-J 0.000 claims abstract description 31
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 31
- 238000001035 drying Methods 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 239000011259 mixed solution Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000009296 electrodeionization Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 11
- 230000003746 surface roughness Effects 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000003064 anti-oxidating effect Effects 0.000 abstract description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 24
- 238000005507 spraying Methods 0.000 description 16
- 238000000227 grinding Methods 0.000 description 11
- 238000003756 stirring Methods 0.000 description 10
- DPGAAOUOSQHIJH-UHFFFAOYSA-N ruthenium titanium Chemical compound [Ti].[Ru] DPGAAOUOSQHIJH-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 238000000909 electrodialysis Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 229910001927 ruthenium tetroxide Inorganic materials 0.000 description 1
- -1 titanium dioxide compound Chemical class 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/30—Metallic substrate based on refractory metals (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W)
- B05D2202/35—Metallic substrate based on refractory metals (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W) based on Ti
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/30—Change of the surface
- B05D2350/33—Roughening
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- Chemical Kinetics & Catalysis (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Molecular Biology (AREA)
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- Health & Medical Sciences (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Abstract
The invention discloses a preparation method of a titanium electrode coating of a continuous electric desalting membrane block, which comprises the following steps: coating a mixed solution containing iridium tetrachloride, ruthenium trichloride and titanium dioxide on the surface of a polished titanium base material, drying, forming a coating on the surface of the titanium base material, and performing heat treatment to form a continuous electrodeionization block titanium electrode coating on the surface of the titanium base material. According to the invention, a compact anti-oxidation coating is formed on the surface of the titanium substrate by adopting the mixture containing iridium tetrachloride, ruthenium trichloride and titanium dioxide, and a coating with high stability and strong catalytic oxygen evolution is formed after heat treatment, and the coating has the characteristics of compactness, difficulty in falling, long service life and the like, and can prolong the service life of the titanium electrode by more than 50%, so that the whole service life of the continuous electric desalting membrane block is prolonged.
Description
Technical Field
The invention belongs to the field of water treatment, and particularly relates to a preparation method of a titanium electrode coating of a continuous electric desalting membrane block.
Background
An electrode prepared by a titanium substrate is one of key parts of equipment such as electrodialysis, a continuous electric desalting membrane block and the like, and through years of application and verification, the titanium ruthenium-coated electrode is an ideal electrode material. It is light, corrosion resistant, high in strength and moderate in cost. However, the service life of the titanium ruthenium-coated electrode is generally 3-5 years, and the longest service life of the titanium ruthenium-coated electrode is not more than 8 years. The reason is that equipment manufacturers of continuous electric desalting membrane blocks generally use titanium ruthenium-coated electrodes of electrodialysis devices, and the essence of anode electrochemical reaction of the continuous electric desalting membrane blocks is ignored. The electrodialysis equipment is mainly applied to water with high chlorine content (generally in a level of more than 2000 mg/L), the anode electrode reaction is mainly chlorine release, in a boiler make-up water desalting system of a thermal power plant, the inlet water of a continuous electric desalting membrane block is two-stage reverse osmosis, the chlorine content of the water is only in a single-digit ppm level, and the anode reaction is mainly oxygen release, so that the anode electrode used in the electrodialysis is different from the use environment. The anode of the continuous electric desalting membrane block mainly generates electrochemical reaction for releasing oxygen, atomic oxygen with strong oxidizability can be released in the oxygen releasing process, the oxidizability of the atomic oxygen is higher than that of chlorine, so that the electrode potential is higher, ruthenium dioxide in the titanium ruthenium-coated electrode coating is oxidized into gaseous ruthenium tetroxide, the electrode coating is damaged, and then the base material of the titanium electrode is oxidized to form non-conductive oxide, so that the service life of the titanium electrode is shortened. Due to the particularity of the preparation process of the continuous electric desalting membrane block, the titanium electrode is aged and falls off and cannot be replaced on site, the titanium electrode can only be returned to a factory for maintenance, the imported brand does not provide maintenance, and the membrane block can only be replaced, so that the operation cost of the thermal power plant is greatly increased, the replacement period is long, and the safe operation of a desalting system of the thermal power plant is not facilitated. Therefore, the coating of the titanium electrode needs to be redesigned to adapt to the use environment of anodic oxygen evolution of the continuous electric desalting membrane block, prolong the service life of the continuous electric desalting membrane block and have important economic benefits.
Disclosure of Invention
The invention aims to provide a preparation method of a titanium electrode coating of a continuous electric desalting membrane block, and the coating prepared by the method has the characteristics of compact coating, strong oxidation resistance and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing a titanium electrode coating of a continuous electric desalting membrane block comprises the following steps:
coating a mixed solution containing iridium tetrachloride, ruthenium trichloride and titanium dioxide on the surface of a polished titanium substrate, drying, forming a coating on the surface of the titanium substrate, and then carrying out heat treatment to form a continuous electrodesalting membrane titanium electrode coating on the surface of the titanium substrate.
Furthermore, in the mixed solution containing iridium tetrachloride, ruthenium trichloride and titanium dioxide, the mass concentration of iridium tetrachloride is 45-55%, the mass concentration of ruthenium trichloride is 25-45%, and the mass concentration of titanium dioxide is 15-25%.
Further, the surface roughness of the titanium substrate after the grinding treatment is Ra 10-12.
Further, the drying temperature is 80-90 ℃.
Further, the thickness of the coating layer formed on the surface of the titanium substrate is 9 to 11 μm.
Further, the temperature of the heat treatment is 400-450 ℃, and the time is 1-2 hours.
Further, the thickness of the titanium substrate was 0.5 mm.
Further, the titanium substrate is a titanium electrode.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, a compact anti-oxidation coating is formed on the surface of the titanium substrate by adopting the mixture containing iridium tetrachloride, ruthenium trichloride and titanium dioxide, and a coating with high stability and strong catalytic oxygen evolution is formed after heat treatment, and the coating has the characteristics of compactness, difficulty in falling, long service life and the like, and can prolong the service life of the titanium electrode by more than 50% (compared with the conventional titanium ruthenium-coated electrode on the market), thereby prolonging the whole service life of the continuous electric desalting membrane block.
Furthermore, the titanium substrate is subjected to roughness treatment, wherein the roughness degree is Ra10-12, and the adhesion of the coating and the titanium substrate is improved.
Detailed Description
The present invention will be described in detail below with reference to specific examples.
A method for preparing a titanium electrode coating of a continuous electric desalting membrane block comprises the following steps:
1) polishing the surface of the titanium substrate to improve the roughness; wherein, the titanium base material is titanium base anode steel plate that thickness is 0.5mm, polishes titanium base anode steel plate for the roughness is more than Ra10, prefers: ra10-12 to form a pitted surface, which is beneficial to improving the adhesive force between the coating and the substrate material; and (4) after polishing, washing the polished.
2) Preparing a mixed solution of iridium tetrachloride, ruthenium trichloride and titanium dioxide; specifically, a certain amount of hydrochloric acid is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added into the hydrochloric acid, the mixture is uniformly stirred to form a mixed solution, and the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 45% -55%, 25% -35% and 15% -25% respectively;
3) uniformly coating the mixed solution on the surface of a treated titanium substrate (a titanium electrode plate) to a coating thickness of 10 +/-1 mu m; after the spraying is finished, drying the mixture in a drying furnace at the temperature of 80-90 ℃; the mixed solution is repeatedly coated to ensure that the thickness of the dried coating is 10 mu m (the error is +/-1 mu m), and the titanium electrode plate is obtained.
4) And (3) placing the coated titanium electrode plate in a high-temperature furnace for baking at the temperature of 400-450 ℃ for 1-2 hours. The chemical reaction is carried out at the temperature of 400-450 ℃ to form a eutectic metal oxidation coating, thereby improving the stability of the coating.
According to the invention, the thickness of the titanium electrode plate is 0.5mm, the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide compound are taken as the coating, the coating with high stability and strong catalytic oxygen evolution is formed, the coating has the characteristics of compactness, strong oxidation resistance and the like, the service life of the titanium electrode can be prolonged by more than 50%, the integral service cycle of the continuous electric desalting membrane block can be further prolonged, and the economic benefit is important.
Example 1
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 10. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 50%, 30% and 20% in sequence, and a mixed solution is obtained after uniform stirring. And (3) uniformly spraying on the titanium pole plate, drying in a drying furnace at 80 ℃ after spraying, and circulating for several times to enable the thickness of the coating to reach 10 micrometers (the error is +/-1 micrometer). And then placing the titanium plate in a high-temperature furnace for baking at the temperature of 420 ℃ for 1 hour to obtain the titanium plate with the continuous electric film removing block titanium electrode coating, and marking as a sample 1.
Example 2
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 10. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 45%, 35% and 20% in sequence, and a mixed solution is obtained after uniform stirring. The titanium pole plate is evenly sprayed, and the titanium pole plate is placed in a drying oven at 90 ℃ for drying after spraying, and the cycle is repeated for several times, so that the thickness of the coating reaches 10 mu m (the error is +/-1 mu m). And then placing the titanium plate in a high-temperature furnace for baking at the temperature of 450 ℃ for 1 hour to obtain the titanium plate with the continuous electric film removing block titanium electrode coating, and marking as a sample 2.
Example 3
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 10. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 45%, 30% and 25% in sequence, and a mixed solution is obtained after uniform stirring. The titanium pole plate is evenly sprayed, and the titanium pole plate is placed in a drying furnace at 85 ℃ for drying after spraying, and the cycle is repeated for several times, so that the thickness of the coating reaches 10 mu m (the error is +/-1 mu m). And then placing the titanium plate in a high-temperature furnace for baking at the temperature of 450 ℃ for 1 hour to obtain the titanium plate with the continuous electric film removing block titanium electrode coating, and marking as a sample 3.
Example 4
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 10. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 55%, 35% and 10% in sequence, and a mixed solution is obtained after uniform stirring. The titanium pole plate is evenly sprayed, and the titanium pole plate is placed in a drying furnace at 85 ℃ for drying after spraying, and the cycle is repeated for several times, so that the thickness of the coating reaches 10 mu m (the error is +/-1 mu m). And then placing the titanium plate in a high-temperature furnace for baking at 400 ℃ for 1 hour to obtain the titanium plate with the continuous electric film removing block titanium electrode coating, and marking as a sample 4.
Example 5
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 10. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 55%, 30% and 15% in sequence, and a mixed solution is obtained after uniform stirring. And (3) uniformly spraying on the titanium pole plate, drying in a baking furnace at 87 ℃ after spraying, and circulating for several times to enable the thickness of the coating to reach 10 micrometers (the error is +/-1 micrometer). And then placing the titanium plate in a high-temperature furnace for baking at the temperature of 450 ℃ for 1 hour to obtain the titanium plate with the continuous electric film removing block titanium electrode coating, and marking as a sample 5.
Example 6
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 10. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 50%, 35% and 25% in sequence, and a mixed solution is obtained after uniform stirring. The titanium pole plate is evenly sprayed, and the titanium pole plate is placed in a baking oven at 82 ℃ for drying after spraying, and the cycle is repeated for several times, so that the thickness of the coating reaches 10 mu m (the error is +/-1 mu m). And then placing the titanium plate in a high-temperature furnace for baking at the temperature of 430 ℃ for 1.5 hours to obtain the titanium plate with the continuous electric film removing block titanium electrode coating, and marking as a sample 6.
Comparative example 1
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 10. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride and ruthenium trichloride are added, the mass concentrations of the iridium tetrachloride and the ruthenium trichloride are 50% and 50% in sequence, and a mixed solution is obtained after uniform stirring. And (3) uniformly spraying on the titanium pole plate, drying in a baking furnace at 87 ℃ after spraying, and circulating for several times to enable the thickness of the coating to reach 10 micrometers (the error is +/-1 micrometer). And then placing the titanium plate in a high-temperature furnace for baking at the temperature of 450 ℃ for 1.5 hours to obtain the titanium plate with the continuous electric film removing block titanium electrode coating, and marking as a sample 7.
Comparative example 2
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 10. 100mL of hydrochloric acid with the mass concentration of 35% is taken, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the ruthenium trichloride and the titanium dioxide are 50% and 50% in sequence, and a mixed solution is obtained after uniform stirring. The titanium pole plate is evenly sprayed, and the titanium pole plate is placed in a drying oven at 90 ℃ for drying after spraying, and the cycle is repeated for several times, so that the thickness of the coating reaches 10 mu m (the error is +/-1 mu m). And then placing the titanium plate in a high-temperature furnace for baking at the temperature of 430 ℃ for 1.5 hours to obtain the titanium plate with the continuous electric film removing block titanium electrode coating, and marking as a sample 8.
The test effects of the 8 examples are detailed in table 1, and it can be seen from table 1 that the continuous electrodeionization block titanium electrode coating prepared by the examples of the invention has long service life.
TABLE 1 comparison of coating Properties at different mass ratios
| Sample number | Life h |
| Sample 1 | 2230 |
| Sample 2 | 1810 |
| Sample 3 | 1940 |
| Sample No. 4 | 1650 |
| Sample No. 5 | 1700 |
| Sample No. 6 | 2330 |
| Sample 7 | 310 |
| Sample 8 | 850 |
Note: the titanium electrode plate with the continuous electric membrane removing block titanium electrode coating is prepared and respectively used as an anode and a cathode, and is placed in an electrolytic bath for an electrolysis test to test the performance of the electrode. The electrolyte solution is a mixed solution of sodium chloride and dicationic water, the concentration of NaCl is 100mg/L, the mass concentration of hydrogen peroxide is 35%, and the concentration is maintained. And simultaneously, automatically inverting the electrode every half hour to observe the corrosion condition of the electrode.
Example 7
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 11. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 55%, 25% and 20% in sequence, and a mixed solution is obtained after uniform stirring. And (3) uniformly spraying the titanium pole plate, drying the titanium pole plate in a drying furnace at 80 ℃ after spraying, and circulating for several times to enable the thickness of the coating to reach 9 mu m. And then placing the titanium plate in a high-temperature furnace for baking at 400 ℃ for 2 hours to obtain the coated titanium plate.
Example 8
Taking a titanium pole plate, wherein the size of the titanium pole plate is 350mm multiplied by 150mm, the thickness of the titanium pole plate is 0.5mm, and the titanium pole plate is ground, and the roughness after the grinding is Ra 12. 100mL of hydrochloric acid with the mass concentration of 35% is taken, iridium tetrachloride, ruthenium trichloride and titanium dioxide are added, the mass concentrations of the iridium tetrachloride, the ruthenium trichloride and the titanium dioxide are 52%, 32% and 18% in sequence, and a mixed solution is obtained after uniform stirring. And (3) uniformly spraying the titanium pole plate, drying in a drying furnace at 90 ℃ after spraying, and circulating for several times to enable the thickness of the coating to reach 11 microns. And then placing the titanium plate in a high-temperature furnace for baking at 440 ℃ for 1 hour to obtain the coated titanium plate.
The above description is only an example of the implementation steps of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A preparation method of a titanium electrode coating of a continuous electric desalting membrane block is characterized by comprising the following steps:
coating a mixed solution containing iridium tetrachloride, ruthenium trichloride and titanium dioxide on the surface of a polished titanium substrate, drying, forming a coating on the surface of the titanium substrate, and then carrying out heat treatment to form a continuous electrodesalting membrane titanium electrode coating on the surface of the titanium substrate.
2. The method for preparing the titanium electrode coating of the continuous electrodeionization membrane block as claimed in claim 1, wherein the mass concentration of iridium tetrachloride is 45% -55%, the mass concentration of ruthenium trichloride is 25% -45%, and the mass concentration of titanium dioxide is 15% -25% in the mixed solution containing iridium tetrachloride, ruthenium trichloride and titanium dioxide.
3. The method for preparing the titanium electrode coating of the continuous electrodesalting membrane block as claimed in claim 1, wherein the surface roughness of the ground titanium substrate is Ra 10-12.
4. The method for preparing the titanium electrode coating of the continuous electrodeionization membrane block as claimed in claim 1, wherein the drying temperature is 80-90 ℃.
5. The method for preparing the titanium electrode coating of the continuous electrodesalting membrane block as claimed in claim 1, wherein the thickness of the coating formed on the surface of the titanium substrate is 9-11 μm.
6. The method as claimed in claim 1, wherein the heat treatment temperature is 400-450 ℃ and the time is 1-2 hours.
7. The method of claim 1, wherein the titanium substrate has a thickness of 0.5 mm.
8. The method of claim 1, wherein the titanium substrate is a titanium electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210061604.1A CN114405794A (en) | 2022-01-19 | 2022-01-19 | Preparation method of titanium electrode coating of continuous electric desalting membrane block |
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| CN116037439A (en) * | 2022-11-30 | 2023-05-02 | 江苏亿安腾特种电极新材料科技有限公司 | Back coating process for producing titanium anode plate for electrolytic copper foil |
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| CN116037439A (en) * | 2022-11-30 | 2023-05-02 | 江苏亿安腾特种电极新材料科技有限公司 | Back coating process for producing titanium anode plate for electrolytic copper foil |
| CN116037439B (en) * | 2022-11-30 | 2023-10-24 | 江苏亿安腾特种电极新材料科技有限公司 | Back coating process for producing titanium anode plate for electrolytic copper foil |
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