CN117721471A - Cathode protection method for guide wheel component in slag dragging machine in high-salt water environment - Google Patents
Cathode protection method for guide wheel component in slag dragging machine in high-salt water environment Download PDFInfo
- Publication number
- CN117721471A CN117721471A CN202311579547.7A CN202311579547A CN117721471A CN 117721471 A CN117721471 A CN 117721471A CN 202311579547 A CN202311579547 A CN 202311579547A CN 117721471 A CN117721471 A CN 117721471A
- Authority
- CN
- China
- Prior art keywords
- cathode
- guide wheel
- sacrificial anode
- anode material
- cathode electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000010405 anode material Substances 0.000 claims abstract description 71
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000010406 cathode material Substances 0.000 claims description 38
- 238000005260 corrosion Methods 0.000 claims description 23
- 229910045601 alloy Inorganic materials 0.000 claims description 19
- 239000000956 alloy Substances 0.000 claims description 19
- 230000007797 corrosion Effects 0.000 claims description 19
- 238000004210 cathodic protection Methods 0.000 claims description 15
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 10
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 10
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000006722 reduction reaction Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims 3
- 239000012267 brine Substances 0.000 claims 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims 2
- 238000012360 testing method Methods 0.000 description 12
- 229910001297 Zn alloy Inorganic materials 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 238000012795 verification Methods 0.000 description 6
- 230000010287 polarization Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical class N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910007570 Zn-Al Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a cathode protection method for an inner guide wheel component of a slag dragging machine in a high-salt water environment, which comprises the following steps: selecting the type of sacrificial anode materials according to the materials of the guide wheel component in the protected slag dragging machine and the service environment of the sacrificial anode materials; according to the high-salt high-temperature service conditions of the inner guide wheel part of the slag dragging machine, selecting the protection current density required by the cathode protection of the inner guide wheel part, and calculating the surface area of the required sacrificial anode material according to the protection current density; according to the type of the selected sacrificial anode material and the surface area of the sacrificial anode material, the sacrificial anode material is manufactured, and then the sacrificial anode material is installed.
Description
Technical Field
The invention belongs to the technical field of electrochemical cathodic protection of thermal power plants, and relates to a cathodic protection method for a guide wheel component in a slag dragging machine in a high-salt water environment.
Background
As one of the important equipment for the normal operation of the thermal power plant, the slag extractor is widely applied to slag extraction operation of the boiler of the thermal power plant, and the operation reliability of the slag extractor not only can influence various performances of the equipment, but also can influence the normal operation conditions of the equipment such as the boiler and the like, thereby influencing the power generation efficiency and the quality of the thermal power plant. Meanwhile, due to the special working condition of the slag dragging machine, more serious friction and abrasion exist among slag, a chain and an inner guide wheel, so that the inner guide wheel is easy to generate friction and abrasion corrosion, breakage is caused, and production is affected. Moreover, the desulfurization wastewater with higher salt content is introduced into the thermal power plant on the basis of the original slag water, so that components are corroded more seriously in the service process. The existing material can only meet the engineering requirements when desulfurization wastewater is not introduced, but after desulfurization wastewater is introduced, the parts are subjected to dual effects of corrosion and friction and abrasion, and the service life is greatly reduced. Therefore, in order to ensure the normal operation of the slag extractor and the economic benefit of a thermal power plant, an effective process is required to be found to effectively protect the guide wheel in the slag extractor, so that the service life of the slag extractor is prolonged.
Cathodic protection is an anti-corrosion process applicable to most metal materials, but the application of cathodic protection to guide wheels in power plant slag-dragging machines is not uncommon. Therefore, the cathode protection process suitable for the inner guide wheel of the slag dragging machine in the high-salt water environment is developed, and has important significance for realizing corrosion protection of the inner guide wheel part of the slag dragging machine, saving cost and guaranteeing safety.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cathode protection method for the guide wheel component in the slag dragging machine in a high-salt water environment, which can realize corrosion protection of the guide wheel component in the slag dragging machine.
In order to achieve the above purpose, the invention discloses a cathode protection method for a guide wheel component in a slag dragging machine in a high-salt water environment, which comprises the following steps:
selecting the type of sacrificial anode materials according to the materials of the guide wheel component in the protected slag dragging machine and the service environment of the sacrificial anode materials;
according to the high-salt high-temperature service conditions of the inner guide wheel part of the slag dragging machine, selecting the protection current density required by the cathode protection of the inner guide wheel part, and calculating the surface area of the required sacrificial anode material according to the protection current density;
and manufacturing a sacrificial anode material according to the selected type of the sacrificial anode material and the surface area of the sacrificial anode material, and installing the sacrificial anode material.
The sacrificial anode material is selected to be zinc-aluminum alloy.
The mass percentage of Al in the zinc-aluminum alloy is 5%.
The area of the sacrificial anode material required for the cathode material per unit area is:
U anode ＝I×R Total (S)
R Total (S) ＝R Cathode electrode +R Solution +R Welding
I＝s Cathode electrode ×i Cathode electrode
s Anode ＝I÷i Anode
Wherein R is Cathode electrode Resistance, ρ, of cathode material (protected material) Cathode electrode For resistivity of cathode material, L Cathode electrode For the length of the cathode material, S Cathode electrode Is the cross-sectional area of the cathode material, s Cathode electrode For the surface area of the cathode material, i Cathode electrode To protect the current density.
Protection current density i Cathode electrode Is 30mA/m 2 。
And determining the protection current density required by cathodic protection, taking the inner guide wheel of the slag dragging machine, the anode material, the welding point and surrounding solution as a complete circuit system, and fitting an equivalent circuit diagram of the complete circuit system, wherein the anode material is subjected to oxidation reaction to provide electrons, and the cathode material, the solution and the welding point are subjected to reduction reaction to consume the electrons, so that the surface area of the required sacrificial anode material is calculated.
Zinc-aluminum alloy at 60 ℃ and Cl － The current efficiency in the mixed environment of the desulfurization wastewater with the concentration of 20000mg/L and slag water reaches more than 95%, and the self-corrosion potential is-1.123V SCE The corrosion current reaches 1.527 multiplied by 10 -4 A。
The zinc-aluminum alloy is prepared by adopting a casting method.
The invention has the following beneficial effects:
according to the cathode protection method for the inner guide wheel component of the slag dragging machine in the high-salt water environment, when the cathode protection method is specifically operated, the novel zinc-aluminum alloy sacrificial anode material is determined according to the material of the inner guide wheel of the slag dragging machine, the electrochemical activity of the zinc-aluminum alloy sacrificial anode material adopted by the cathode protection method is high, the working potential is sufficiently negative, the current efficiency is high, the corrosion morphology is uniform, corrosion products can automatically fall off, the alloy element composition is less, the production process is simple, and the requirement on the impurity content of raw materials is low. The surface area of the sacrificial anode material is calculated in advance according to the size of the cathode material, so that the anode consumption can be saved, the cost can be saved, and the safety can be improved.
Drawings
FIG. 1 is an equivalent circuit diagram;
FIG. 2 is a plot of potentiodynamic polarization of cathode and anode materials;
FIG. 3 is a graph of the macroscopic morphology of the cathode material after the dip test;
FIG. 4 is a graph of the macroscopic morphology of the anode material after the dip test;
fig. 5 is a graph of the microscopic morphology of the anode material after the interstitial test.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, but not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the accompanying drawings, there is shown a schematic structural diagram in accordance with a disclosed embodiment of the invention. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
The cathodic protection method for the guide wheel component in the slag dragging machine in the high-salt water environment comprises the following steps:
1) Selecting a sacrificial anode material;
the type of the sacrificial anode material is selected according to the material of the guide wheel component in the protected slag dragging machine and the service environment of the sacrificial anode material.
2) Calculating the area of the sacrificial anode;
reference is made to the drawings1, according to the service conditions of high salt and high temperature of the inner guide wheel part of the slag dragging machine, selecting the protection current density i required by cathode protection of the inner guide wheel part to be 30mA/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Regarding an inner guide wheel (cathode material), anode material, welding points and surrounding solution of a slag conveyor as a complete circuit system, fitting to obtain an equivalent circuit diagram of the circuit system, wherein the anode material is subjected to oxidation reaction to provide electrons, the cathode material, the solution and the welding points are subjected to reduction reaction to consume electrons, the shape and the materials of the cathode material are fixed, a current value I in the circuit is calculated according to the surface area of the cathode material and the required protection current density, and the resistance values of the inner guide wheel, the solution and the welding points are obtained through measurement and are fixed values R in the system Total (S) According to the characteristics of the series circuit, the potential of the anode material is calculated by u=ir, and the current density i at this potential is determined according to the potentiodynamic polarization curve of the anode material Anode Finally, the surface area of the required anode material is calculated.
In the embodiment, the composition of the sacrificial anode material is Zn-Al, and comprises 5% of Al, less than or equal to 0.1% of impurities and the balance of Zn in percentage by mass; the impurities are metal oxides that remain in the melt.
In this embodiment, the sacrificial anode material is Cl at 60 DEG C － The current efficiency in the mixed environment of the desulfurization wastewater with the concentration of 20000mg/L and slag water reaches more than 95%, and the self-corrosion potential is-1.123V SCE The corrosion current was 1.527×10 -4 A。
In the embodiment, zinc is used as a raw material, 5 weight percent of aluminum is added, and smelting is carried out by adopting a casting method, so that the sacrificial anode material is prepared.
In order to select a proper sacrificial anode material, three zinc alloys of Zn, zn-5Al and Zn-55Al are selected as anode materials for the experiment.
Example 1
The zinc alloy sacrificial anode material suitable for the guide wheel part in the power plant slag dragging machine comprises the following components in percentage by weight: al:5 percent, the impurity is less than or equal to 0.1 percent, and the balance is Zn.
The preparation method of the sacrificial anode material comprises the following steps: according to the alloy formula, alloy elements with corresponding mass are weighed, melted by adopting a resistance furnace, specifically, zinc and aluminum are placed in a preheated graphite crucible in a melting furnace, charcoal covering agent is added, the temperature is set at 600 ℃, after a metal ingot is melted, the weighed Al coated by zinc foil is pressed into zinc liquid by using a bell jar, the temperature is kept for 30 minutes, and after all the alloy elements are melted, the power can be cut off. Then adding a refining agent for refining, stirring to uniformly mix and fully alloy all the alloy components, pouring after the temperature of the furnace is reduced to 450 ℃ for slagging-off, naturally cooling, and casting and molding.
Comparative example one
The zinc alloy sacrificial anode material suitable for the guide wheel part in the power plant slag dragging machine comprises the following components in percentage by weight: zn:100% purity was 99.5%.
Comparative example two
The zinc alloy sacrificial anode material suitable for the guide wheel part in the power plant slag dragging machine comprises the following components in percentage by weight: al:55%, si:1.6 percent, impurity is less than or equal to 0.1 percent, and the balance is Zn.
Verification example one
The zinc alloy anode materials and the cathode inner guide wheel materials (20 CrMnTi) with different alloy contents prepared in the first example, the comparative example and the comparative example II are subjected to electrochemical dynamic polarization curve test.
The cathode material and the anode material were cut into blocks with a size of 10 x 3mm for preparing electrochemical working electrode samples with a test area of 1cm 2 The rest surfaces are encapsulated by using insulating glue.
The electrochemical test adopts a three-electrode system, a reference electrode is a saturated calomel electrode, an auxiliary electrode is a platinum sheet electrode with the thickness of 10 x 1mm, a sample to be tested is a working electrode, and an electrolyte is desulfurization wastewater, wherein Cl - The concentration is 20000mg/L and the test temperature is 60 ℃.
The open circuit point position of the test sample is tested, the test time is 1200s, the potentiodynamic polarization test range is the open circuit point position + -0.3V, the sensitivity is automatic, and the scanning speed is 0.05V/s.
The electrodynamic polarization curves of the cathode and anode materials are shown in fig. 1, and the fitting data results are shown in tables 1 and 2.
TABLE 1
TABLE 2
Verification example two
And carrying out an intermittent dip-coating corrosion experiment on the zinc alloy anode materials and the cathode inner guide wheel materials (20 CrMnTi) with different alloy contents prepared in the first example, the comparative example and the second example, and observing the morphology of each sample after corrosion.
The cathode material is made into blocks with the size of 50-25-5 mm by using a wire-cut electric discharge machine, a through hole with the diameter of 3 is made on one side by using a drilling machine, a copper wire is connected with the cathode material, and the joint is sealed by using insulating glue.
After the potential of the selected zinc alloy is determined to be satisfactory for protecting the slag conveyor components, the area of the sacrificial anode material required for the cathode material per unit area is calculated by the following formula.
U Anode ＝I×R Total (S)
R Total (S) ＝R Cathode electrode +R Solution +R Welding
I＝s Cathode electrode ×i Cathode electrode
s Anode ＝I÷i Anode
Wherein R is Cathode electrode Resistance, ρ, of cathode material (protected material) Cathode electrode For resistivity of cathode material, L Cathode electrode For the length of the cathode material, S Cathode electrode Is the cross-sectional area of the cathode material, s Cathode electrode Is cathode materialSurface area of i Cathode electrode For cathodic protection current density, the cathodic protection current density i in the slag conveyor system is empirically determined to be 30mA/m 2 。
And calculating the areas of anode materials required by different cathode materials according to a formula, cutting the areas required by the anode materials by adopting a wire electric discharge machine, connecting the anode materials with the cathode materials by using copper wires, and then packaging the anode materials by using epoxy resin.
The wires of the anode material and the cathode material are connected with each other and placed on a rotary hanging piece corrosion tester, and the corrosive liquid is Cl - The desulfurization wastewater with the concentration of 20000mg/L is added with NaOH, the pH value is controlled to be 9, and the water bath temperature is 60 ℃. The etching mode is rotary intermittent immersion, the time of immersing the sample in the etching solution is 60s in one period, the time in the air is 180s, and the whole operation time is 120h.
Macroscopic views of the cathode material and the anode material after the intermittent soaking experiment are shown in fig. 2 and 3, and microscopic morphology views of the anode material are shown in fig. 4.
Verification example three
And performing an intermittent corrosion experiment on the zinc alloy anode materials and the cathode inner guide wheel materials (20 CrMnTi) with different alloy contents prepared in the first example, the comparative example and the second example, and calculating the quality difference and the corrosion rate before and after each sample is corroded.
And separating the cathode material and the anode material which are subjected to the intermittent dip corrosion test, repeatedly washing and drying the sample by using deionized water until no crystal salt is separated from the surface.
And placing the cathode material in dilute hydrochloric acid, performing ultrasonic oscillation for 10min to remove surface corrosion products, then cleaning with deionized water and alcohol, weighing, and calculating the weight loss mass.
And placing the anode material in a saturated ammonium acetate solution, performing ultrasonic oscillation for 5min to remove surface corrosion products, then cleaning with deionized water and alcohol, weighing, and calculating the weight loss mass.
The mass before and after the immersion test between the anode material and the cathode material is shown in tables 3 and 4.
TABLE 3 Table 3
TABLE 4 Table 4
The corrosion rate of the cathode material per unit area and unit time can be calculated according to the cathode weightlessness mass before and after the intermittent immersion experiment, the calculation formula is shown as follows, and the calculation result is shown in table 5.
Wherein m is 1 The mass before the experiment; m is m 2 The quality after the experiment; Δm 3 Quality of blank control; s is the surface area of the sample; t is the experimental time; d is the sample density; r is the corrosion rate.
TABLE 5
TABLE 6
Combining the test results of the first verification example, the second verification example and the third verification example, when Al:5%, zn: and when the impurity content is less than or equal to 0.1%, the sacrificial anode material has better cathodic protection effect in practical application.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (8)
1. A cathodic protection method for a guide wheel component in a slag dragging machine in a high-salt water environment, which is characterized by comprising the following steps:
selecting the type of sacrificial anode materials according to the materials of the guide wheel component in the protected slag dragging machine and the service environment of the sacrificial anode materials;
according to the high-salt high-temperature service conditions of the inner guide wheel part of the slag dragging machine, selecting the protection current density required by the cathode protection of the inner guide wheel part, and calculating the surface area of the required sacrificial anode material according to the protection current density;
and manufacturing a sacrificial anode material according to the selected type of the sacrificial anode material and the surface area of the sacrificial anode material, and installing the sacrificial anode material.
2. The method of claim 1, wherein the sacrificial anode material is selected from the group consisting of zinc-aluminum alloys.
3. The cathodic protection method for an inner guide wheel member of a slag dragging machine under a high salt water environment as recited in claim 2, wherein the mass percentage of Al in the zinc-aluminum alloy is 5%.
4. The method of claim 1, wherein the area of sacrificial anode material required per unit area of cathode material is:
U anode ＝I×R Total (S)
R Total (S) ＝R Cathode electrode +R Solution +R Welding
I＝s Cathode electrode ×i Cathode electrode
s Anode ＝I÷i Anode
Wherein R is Cathode electrode Resistance, ρ, of cathode material (protected material) Cathode electrode For resistivity of cathode material, L Cathode electrode For the length of the cathode material, S Cathode electrode Is the cross-sectional area of the cathode material, s Cathode electrode For the surface area of the cathode material, i Cathode electrode To protect the current density.
5. The method of cathodic protection of a stator component in a slag conveyor in a high brine environment of claim 1 wherein the protection current density i Cathode electrode Is 30mA/m 2 。
6. The method of claim 1, wherein the current density required for cathodic protection is determined, the current density is determined by using the current density, the anode material, the weld and the surrounding solution as a complete circuit system, and fitting an equivalent circuit diagram of the complete circuit system, wherein the anode material undergoes oxidation reaction to provide electrons, and the cathode material, the solution and the weld undergo reduction reaction to consume electrons, thereby calculating the surface area of the sacrificial anode material.
7. The method of cathodic protection of a guide wheel member in a slag dragging machine in a high brine environment of claim 2 wherein the zinc-aluminum alloy is at 60 ℃ Cl － The current efficiency in the mixed environment of the desulfurization wastewater with the concentration of 20000mg/L and slag water reaches more than 95%, and the self-corrosion potential is-1.123V SCE The corrosion current reaches 1.527 multiplied by 10 -4 A。
8. The cathodic protection method for an inner guide wheel member of a slag dragging machine in a high-salt water environment of claim 1, wherein the zinc-aluminum alloy is prepared by a casting method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311579547.7A CN117721471A (en) | 2023-11-23 | 2023-11-23 | Cathode protection method for guide wheel component in slag dragging machine in high-salt water environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311579547.7A CN117721471A (en) | 2023-11-23 | 2023-11-23 | Cathode protection method for guide wheel component in slag dragging machine in high-salt water environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117721471A true CN117721471A (en) | 2024-03-19 |
Family
ID=90209751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311579547.7A Pending CN117721471A (en) | 2023-11-23 | 2023-11-23 | Cathode protection method for guide wheel component in slag dragging machine in high-salt water environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117721471A (en) |
-
2023
- 2023-11-23 CN CN202311579547.7A patent/CN117721471A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102703846B (en) | Hot dip coating Zn-Al-Zr alloy coating and hot dip coating method of hot dip coating Zn-Al-Zr alloy coating | |
| CN101245425A (en) | Lead alloy, uses and manufacturing technique thereof | |
| CN112708809B (en) | Meta-aluminate-resistant rare earth aluminum alloy anode material and manufacturing method thereof | |
| CN101880792B (en) | Anti-corrosive anti-oxidation Pb-free solder alloy for aluminum soldering | |
| CN108682866B (en) | Novel lead-calcium-tin-aluminum alloy, positive plate grid comprising same and lead-acid storage battery | |
| MX2008010649A (en) | Improved alloy and anode for use in the electrowinning of metals. | |
| EP1533856A1 (en) | Alpha-lead-dioxide coated electrode grid for lead acid batteries | |
| CN102154651A (en) | Sacrificial anode for deep sea environment and manufacturing method thereof | |
| CN117721471A (en) | Cathode protection method for guide wheel component in slag dragging machine in high-salt water environment | |
| US6589298B1 (en) | Surface treatment of metallic components of electrochemical cells for improved adhesion and corrosion resistance | |
| US4264419A (en) | Electrochemical detinning of copper base alloys | |
| CN106782849A (en) | One kind compound hard state copper busbar and its preparation technology | |
| CN114789240B (en) | Anode for electrolytic manganese metal and preparation method thereof | |
| CN110983080A (en) | Method for preparing ultra-low sulfur cupronickel by adopting vacuum melting equipment | |
| CN117721472A (en) | Zinc-aluminum-magnesium alloy sacrificial anode material for power plant slag conveyor chain | |
| JP5481179B2 (en) | Method for stripping Sn plating layer of Cu-based material | |
| CN105220024B (en) | A kind of electrowinning zinc negative electrode aluminium alloy and preparation method thereof | |
| CN110616338B (en) | Impurity removal method for copper melt and preparation method for high-purity high-conductivity copper | |
| CN104451500B (en) | The method that aluminium scrap raw material carries out hot-dip is added in a kind of plating solution | |
| US4246083A (en) | Removal of surface material | |
| NO167724B (en) | DEVICE FOR STEERING A DRIVE SHIFT DRIVE ON A VEHICLE FRAME. | |
| CN101633988B (en) | Industrial pure lead with liquid oxidation resistance and application thereof | |
| CN107699735B (en) | Copper alloy hot dip tin alloy and preparation method thereof | |
| CN101654750A (en) | Non-aluminium low-calcium lead-silver-calcium rare earth alloy and preparation method thereof | |
| CN110541129A (en) | method for improving pitting corrosion resistance of aluminum-based amorphous alloy by adopting low-concentration corrosion inhibitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |