CN115613038A - Sacrificial anode performance detection method and device - Google Patents

Sacrificial anode performance detection method and device Download PDF

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Publication number
CN115613038A
CN115613038A CN202211183857.2A CN202211183857A CN115613038A CN 115613038 A CN115613038 A CN 115613038A CN 202211183857 A CN202211183857 A CN 202211183857A CN 115613038 A CN115613038 A CN 115613038A
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sacrificial anode
cathode
service
collecting
anode
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CN202211183857.2A
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Inventor
于林
刘朝信
王辉
王海涛
丁慧
王廷勇
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Sunrui Marine Environment Engineering Co ltd
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Sunrui Marine Environment Engineering Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/22—Monitoring arrangements therefor
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/04—Controlling or regulating desired parameters

Abstract

The invention provides a sacrificial anode performance detection method and a device, wherein the method comprises the following steps: preparing a sacrificial anode in a preset service stage; burying a sacrificial anode and a cathode barrel in a preset service stage in a filling material in a reaction container, and connecting the sacrificial anode, a standard resistor and the cathode barrel together in series; collecting detection parameters of a standard resistor, a sacrificial anode and a cathode barrel; and detecting the cathodic protection performance of the sacrificial anode in the long-term service process according to the detection parameters. According to the sacrificial anode performance detection method and device provided by the invention, the actual service environment of the sacrificial anode is simulated through the filler in the reaction container, the sacrificial anodes in different service stages are prepared, and the long-term protection effect of the sacrificial anode in the sandstone-buried environment is more scientifically and reasonably detected by detecting various parameters of the sacrificial anode and the protected cathode barrel in different service stages, so that a basis is provided for the design of steel structure cathode protection in the sandstone-buried environment.

Description

Sacrificial anode performance detection method and device
Technical Field
The invention relates to the technical field of corrosion and protection, in particular to a sacrificial anode performance detection method and a sacrificial anode performance detection device.
Background
The cathodic protection of the sacrificial anode is used as an economic and effective metal corrosion prevention method and is widely applied to oceans and offshore steel structures, buried pipelines and the like. For the sacrificial anode in the uniform medium such as natural seawater, artificially prepared seawater or freshwater seawater and the like, the method for evaluating the cathodic protection performance of the sacrificial anode is relatively mature and widely applied, for example, the method recommended by GB/T17848, NACE TM0190 and DNV RP B401 appendix B can be referred to in the test of the short-term performance of the sacrificial anode; DNV RP B401 annex C (12 months test period) can be referred to for long-term performance testing of sacrificial anodes.
In recent years, with the continuous development of underwater immersed tube tunnel engineering technology, steel shell type immersed tube tunnels are widely applied to river-crossing and sea-crossing engineering, such as tunnel areas, deep middle channels and the like of a majored bridge in beaconies and australia. The service life of the steel shell type immersed tube tunnel is usually 50-100 years. The steel shell of the immersed tube tunnel usually adopts a corrosion protection mode combining a coating and a sacrificial anode. Because the immersed tube steel shell tunnel can be buried by adopting backfill stones, the service environment of the sacrificial anode has obvious difference compared with seawater. In the environment buried by gravels, corrosion products formed by the sacrificial anode in the service process can only diffuse through the gravels gaps, and meanwhile, the transmission of related ions is also influenced by the physical isolation of the gravels, so that the resistivity of the working environment of the sacrificial anode is increased; because the material transmission and exchange are limited, the parameters of pH, resistivity, dissolved oxygen concentration and the like of the surrounding environment of the anode are greatly different from those of natural seawater along with the accumulation of corrosion products; the difference of anode surface states can be caused by the filling compactness of the sand and the uneven particle size of the sand, and a local micro battery can be formed, so that the dissolution appearance and the electric capacity of the anode in the sand covered environment are different from those of natural seawater.
The long-term service evaluation method is established for the sacrificial anode adopted by the immersed tube steel shell, so that the corrosion resistance durability of the immersed tube steel shell can be effectively evaluated, and the immersed tube tunnel structure is further ensured to obtain reliable corrosion protection. At present, the research on the sacrificial anode protection effect in the sea mud and sand buried seawater environment is less, and particularly the long-term cathode protection effect evaluation needs to be solved urgently.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method and an apparatus for detecting performance of a sacrificial anode, which are used to research changes in cathodic protection performance of the sacrificial anode in different service stages in a sand-buried environment, and solve the technical problem of detecting cathodic protection effect of the sacrificial anode in the sand-buried environment.
The invention provides a sacrificial anode performance detection method, which comprises the following steps: preparing a sacrificial anode in a preset service stage; burying a sacrificial anode and a cathode barrel in a preset service stage in a filling material in a reaction container, and connecting the sacrificial anode, a standard resistor and the cathode barrel in series; collecting detection parameters of the standard resistor, the sacrificial anode and the cathode barrel; and detecting the cathodic protection performance of the sacrificial anode in the long-term service process according to the detection parameters.
Further, the preparation of the sacrificial anode in the preset service stage comprises: and burying the sacrificial anode in a filling material of a sleeve arranged in a reaction container, electrolyzing the sacrificial anode, and controlling the electrolysis time to form the sacrificial anode in a preset service stage.
Further, the electrolyzing the sacrificial anode is performed in an environment without other metals except the sacrificial anode and the auxiliary cathode.
Further, the electrolyzing the sacrificial anode comprises: and testing the working potential of the sacrificial anode in real time through a testing tube preset in the vicinity of the sacrificial anode, and if the working potential of the sacrificial anode is greater than a preset potential threshold, reducing the electrolytic current density to reduce the working potential of the sacrificial anode below the potential threshold.
Further, the acquiring the detection parameters of the standard resistor, the sacrificial anode and the cathode barrel comprises: collecting the voltage drop at two ends of the standard resistor, collecting the working potential, pH value and resistivity of the sacrificial anode in the service process, and collecting the working potential of the protected cathode barrel in the service process.
Further, the collecting the voltage drop across the standard resistor comprises: and collecting according to a set period by data collectors connected in parallel at two ends of the standard resistor, and calculating the generation current of the sacrificial anode according to the voltage drop.
Further, the collecting the working potential, the pH value and the resistivity of the sacrificial anode in the service process comprises: and collecting the working potential, the pH value and the resistivity of the sacrificial anode in the service process through a test tube preset in the vicinity of the sacrificial anode.
Further, the collecting the working potential of the cathode barrel in the service process comprises: and acquiring the working potential of the cathode barrel in the service process through a reference electrode preset on a salt bridge in the vicinity of the cathode barrel.
The invention also provides a sacrificial anode performance detection device, which comprises a reaction container, a filling material, a standard resistor, a data collector, a test tube, a salt bridge and a reference electrode; filling materials are arranged in the reaction container and used for simulating the environment of the protected cathode barrel and the environment of the sacrificial anode; the first end of the standard resistor is electrically connected with the sacrificial anode, and the second end of the standard resistor is electrically connected with the cathode barrel; the data acquisition unit is connected between the first end and the second end of the standard resistor in parallel and used for acquiring voltage drops at the two ends of the standard resistor according to a set period; the test tube is arranged in the vicinity of the sacrificial anode and used for testing the working potential, the pH value and the resistivity of the sacrificial anode in the service process; the salt bridge is arranged in the vicinity of the cathode barrel; the reference electrode is arranged on the salt bridge and is isolated from the filling material, and is used for testing the working potential of the protected cathode barrel in the service process.
Further, the sacrificial anode performance detection device also comprises, in the process of preparing sacrificial anodes at different service stages: a direct current power supply, an auxiliary cathode and a sleeve; the anode of the direct current power supply is electrically connected with the sacrificial anode and is used for electrolyzing the sacrificial anode; the auxiliary cathode is electrically connected with the negative electrode of the direct current power supply in the process of electrolyzing the sacrificial anode; the sleeve is used for being sleeved on the periphery of the sacrificial anode in the process of electrolyzing the sacrificial anode, and is used for enabling electrolysis products of the sacrificial anode to be gathered on the periphery of the sacrificial anode.
The method and the device for detecting the performance of the sacrificial anode provided by the invention simulate the actual service environment of the sacrificial anode by the filler in the reaction container, and prepare the sacrificial anode at different service stages by adopting a forced electrolysis method. The electrolyzed sacrificial anode is connected with the cathode barrel in series, and parameters such as generated current, working potential, pH value, resistivity and the like are tested, so that the cathodic protection performance of the sacrificial anode at different stages in the long-term service process of the sacrificial anode is judged, the long-term protection effect of the sacrificial anode in the sandstone-buried environment is evaluated more scientifically and reasonably, and a basis is provided for the design of steel structure cathodic protection in the sandstone-buried environment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a sacrificial anode performance detection device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a sacrificial anode performance detection device in the embodiment of the invention in the process of preparing sacrificial anodes at different service stages.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific details within the scope of the appended claims. Like elements are denoted by like reference numerals throughout the various figures. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The embodiment of the invention provides a sacrificial anode performance detection method, which specifically comprises the following steps: preparing sacrificial anodes in different preset service stages; burying a sacrificial anode and a cathode barrel in a preset service stage in a filling material in a reaction container, and connecting the sacrificial anode, a standard resistor and the cathode barrel together in series; collecting detection parameters of a standard resistor, a sacrificial anode and a protected cathode barrel in a service process; and detecting the cathodic protection performance of the sacrificial anode in the long-term service process according to the detection parameters.
Specifically, in the embodiment, an equal scaling method is adopted, according to the actual engineering cathodic protection current density, the cathode-anode area ratio, the sand grain size and the solution resistivity of the engineering water area, the actual service environment of the sacrificial anode is simulated through the filler in the reaction vessel, and the sacrificial anodes with different consumption rates are prepared and used for simulating the sacrificial anodes in different service stages. Meanwhile, the accumulation of corrosion products and the test of environmental parameters are completed in the process of preparing the sacrificial anodes with different service periods. The sacrificial anode with different service periods is connected with the protected cathode barrels with different areas and a standard resistor in series, wherein the resistance range of the standard resistor is 0.1-1.0 omega, and various parameters of the sacrificial anode and the protected cathode barrels with different service periods are tested, so that the cathode protection performance detection of the sacrificial anode in the long-term service process is realized.
Further, the preparation of the sacrificial anode in the preset service stage comprises: completely burying a sacrificial anode in a filling material of a sleeve arranged in a reaction container, electrolyzing the sacrificial anode by a direct current power supply, and forming the sacrificial anode in a preset service stage by controlling the electrolysis time.
Specifically, the sacrificial anode is completely embedded in the filling material of the sleeve arranged in the reaction vessel, so that the electrolytic product of the sacrificial anode is favorably accumulated around the anode, and the corrosion product is prevented from being diffused along with the electrolytic byproduct H2. Electrically connecting the sacrificial anode with the anode of a DC power supply, connecting the cathode of the DC power supply with an auxiliary cathode, electrolyzing the sacrificial anode by the DC power supply, wherein the current density is 0.4-4.0 mA/cm 2 。
Further, the electrolysis of the sacrificial anode is performed in an environment free of other metals than the sacrificial anode and the auxiliary cathode.
Specifically, in the electrolytic process, other metal materials such as carbon steel, copper and the like can not appear in the reaction vessel, so that the phenomenon that the test medium is polluted and the performance of the sacrificial anode is influenced due to electrolysis caused by stray current is avoided.
Further, the electrolyzing the sacrificial anode comprises: and testing the working potential of the sacrificial anode in real time through a testing tube preset in the vicinity of the sacrificial anode, and if the working potential of the sacrificial anode is greater than a preset potential threshold, reducing the electrolysis current density to reduce the working potential of the sacrificial anode below the potential threshold.
Specifically, in the electrolysis process, the electrolysis current density can be reduced by controlling the current of the direct current power supply and the initial area of the sacrificial anode, the working potential of the sacrificial anode is controlled below-0.85V (relative to the potential of a saturated calomel electrode), the working potential of the sacrificial anode is prevented from being larger than-0.85V, and the working state of the sacrificial anode is inconsistent with the actual service condition.
Further, collecting the detection parameters of the standard resistor, the sacrificial anode and the cathode barrel comprises: collecting the voltage drop at two ends of the standard resistor, collecting the working potential, pH and resistivity of the sacrificial anode in the service process, and collecting the working potential of the protected cathode barrel in the service process.
Specifically, the voltage drop at two ends of the standard resistor is collected according to a set period by a data collector connected in parallel with the two ends of the standard resistor, and the generation current of the sacrificial anode is calculated according to the voltage drop.
Specifically, the working potential, pH and resistivity of the sacrificial anode in the service process are collected through a test tube preset in the vicinity of the sacrificial anode.
Specifically, the working potential of the cathode barrel in the service process is collected through a reference electrode preset on a salt bridge in the vicinity of the cathode barrel.
As shown in fig. 1, an embodiment of the present invention further provides a sacrificial anode performance detection apparatus for use in the above-described sacrificial anode performance detection method, and more specifically, for use in a test for detecting the cathodic protection performance of a sacrificial anode during long-term service. The sacrificial anode performance detection device comprises a reaction container 12, a filling material 6, a standard resistor 7, a data acquisition unit 8, a test tube 4, a salt bridge 10 and a reference electrode 11; the reaction container 12 is internally provided with filling materials 6 for simulating the environment of the protected cathode barrel 9 and the sacrificial anode 2; the first end of the standard resistor 7 is electrically connected with the sacrificial anode 2, and the second end of the standard resistor 7 is electrically connected with the cathode barrel 9; the data collector 8 is connected in parallel between the first end and the second end of the standard resistor 7 and is used for collecting voltage drops at the two ends of the standard resistor 7 according to a set period; the test tube 4 is arranged in the vicinity of the sacrificial anode 2 and used for testing the working potential, the pH value and the resistivity of the sacrificial anode 2 in the service process; the salt bridge 10 is arranged in the vicinity of the cathode barrel 9; the reference electrode 11 is arranged on the salt bridge 10 and isolated from the filling material 6 and is used for testing the working potential of the protected cathode barrel 9 in the service process.
Specifically, the filler 6 in this embodiment is sand, the sand particle size, the environmental resistivity, and other parameters should be consistent with the real service environment of the sacrificial anode 2 and the protected cathode barrel 3, the above parameters are key parameters that affect the protection performance of the sacrificial anode 2, and the evaluation can be closer to the real environment by controlling the above parameters. Reference electrode 11 includes, but is not limited to, a saturated calomel electrode, a silver/silver chloride reference electrode, and the like.
Further, the structure of the sacrificial anode performance detection device provided by the embodiment of the present invention in the process of preparing sacrificial anodes at different service stages is shown in fig. 2, where the device further includes: a direct current power supply 1, an auxiliary cathode 3 and a sleeve 5; the anode of the direct current power supply 1 is electrically connected with the sacrificial anode 2 and is used for electrolyzing the sacrificial anode 2; the auxiliary cathode 3 is electrically connected with the negative electrode of the direct current power supply 1 in the process of electrolyzing the sacrificial anode 2; the sleeve 5 is adapted to be fitted around the sacrificial anode 2 during electrolysis of the sacrificial anode 2 for gathering electrolysis products of the sacrificial anode 2 around the sacrificial anode 2.
Specifically, the auxiliary cathode 3 is made of a passivated metal material, the material can be hastelloy, titanium or other passivated metals, in the process of electrolyzing the sacrificial anode 2, the auxiliary cathode 3 shares most of current in a loop, the surface of the auxiliary cathode can generate hydrogen evolution reaction in the electrolysis process, but the auxiliary cathode can not generate reaction, and other reaction products are prevented from being introduced into a reaction container. The sleeve 5 can be made of PVC material, has good insulating property, and can prevent corrosion products from diffusing with the electrolysis by-product H2 in an accelerating way by being sleeved around the sacrificial anode 2.
The method and the device for detecting the performance of the sacrificial anode provided by the invention simulate the actual service environment of the sacrificial anode by the filler in the reaction vessel by adopting a proportional scaling method, and prepare the sacrificial anode in different service stages by adopting a forced electrolysis method. The electrolyzed sacrificial anode is connected with the cathode barrel in series, and parameters such as generated current, working potential, pH value and resistivity of the cathode barrel are tested, so that the cathodic protection performance of the sacrificial anode at different stages in the long-term service process of the sacrificial anode is judged, the long-term protection effect of the sacrificial anode in the sandstone-buried environment is evaluated more scientifically and reasonably, and a basis is provided for the design of steel structure cathodic protection in the sandstone-buried environment.
In one embodiment, the protected cathode and sacrificial anode are buried In sand-covered freshwater, the resistivity is 40 Ω -cm, the initial area ratio of the protected cathode to the sacrificial anode is 30.
At the initial stage of service of the sacrificial anode, the sacrificial anode starts to work from the non-electrolytic consumption, and under the condition that the working time of the sacrificial anode is 0 day, 10 days, 20 days, 30 days and 40 days, the generated current obtained by the data collector, and the test results of the working potential of the sacrificial anode, the working potential of the protected cathode barrel and the pH value around the sacrificial anode in each working stage are respectively shown in table 1.
TABLE 1 (initial service: anode not consumed)
Figure BDA0003867781010000081
In the middle service period of the sacrificial anode, the sacrificial anode starts to work after being electrolyzed and consumed by 30%, and the generated current obtained by the data collector and the test results of the working potential of the sacrificial anode, the working potential of the protected cathode barrel and the pH value of the periphery of the sacrificial anode in each working stage are respectively shown in table 2 under the conditions that the working time of the sacrificial anode is 0 day, 10 days, 20 days, 30 days and 40 days.
Table 2 (middle service period: anode consumption 30%)
Figure BDA0003867781010000082
In the later service period of the sacrificial anode, the sacrificial anode starts to work after being electrolyzed and consumed by 60%, and the generated current obtained by the data acquisition unit and the test results of the working potential of the sacrificial anode, the working potential of the protected cathode barrel and the pH value of the periphery of the sacrificial anode in each working stage are respectively shown in table 3 under the conditions that the working time of the sacrificial anode is 0 day, 10 days, 20 days, 30 days and 40 days.
Table 3 (late service: anode consumption 60%)
Figure BDA0003867781010000091
As can be seen from the test results: in different service stages of the sacrificial anode, the protected potential of the cathode barrel is less than-1.0V, and the design requirement of DNV RP B401 is met; with the extension of service time, the pH around the anode gradually changes to weak acidity, the influence of the pH on the electrochemical performance of the sacrificial anode needs to be considered during the design of cathodic protection, and the sacrificial anode still has cathodic protection current output with the accumulation of corrosion products. The generated current of the sacrificial anode at the initial stage of service is reduced from 6.1mA to 4.2mA; the generated current of the sacrificial anode in the middle service period is reduced from 5.2mA to 2.5mA; the current generated by the sacrificial anode is reduced to 3.9mA from 9.6mA in the later service period, the cathodic protection current density required by the cathode barrel is larger in the initial period and the final period, and the current is reduced to a certain extent in the middle period. From the above test results, the studied Al-Zn-In-Si sacrificial anode can be used In a sand-buried environment.
In summary, the method and the device for detecting the performance of the sacrificial anode provided by the invention can complete the judgment of the cathodic protection performance of the selected sacrificial anode at different stages in the long-term service process through the tested parameters such as the generated current, the pH value, the working potential and the like, and have important guiding significance for predicting the corrosion resistance durability of the sacrificial anode in the buried environment and optimizing the cathodic protection design.
In the description of the invention, unless explicitly stated or limited otherwise, the terms "first", "second", etc. are used merely to distinguish between similar elements and do not indicate or imply relative importance or a particular order. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A method for detecting the performance of a sacrificial anode is characterized by comprising the following steps:
preparing a sacrificial anode in a preset service stage;
burying a sacrificial anode and a cathode barrel in a preset service stage in a filling material in a reaction container, and connecting the sacrificial anode, a standard resistor and the cathode barrel in series;
collecting detection parameters of the standard resistor, the sacrificial anode and the cathode barrel;
and detecting the cathodic protection performance of the sacrificial anode in the long-term service process according to the detection parameters.
2. The method for detecting the performance of the sacrificial anode according to claim 1, wherein the preparing the sacrificial anode in a preset service stage comprises:
and burying the sacrificial anode in a filling material of a sleeve arranged in a reaction container, electrolyzing the sacrificial anode, and controlling the electrolysis time to form the sacrificial anode in a preset service stage.
3. The method of claim 2, wherein the electrolyzing the sacrificial anode is performed in an environment without other metals except the sacrificial anode and the auxiliary cathode.
4. The method for detecting the performance of a sacrificial anode as claimed in claim 2, wherein the electrolyzing the sacrificial anode comprises: and testing the working potential of the sacrificial anode in real time through a testing tube preset in the vicinity of the sacrificial anode, and if the working potential of the sacrificial anode is greater than a preset potential threshold, reducing the electrolytic current density to reduce the working potential of the sacrificial anode below the potential threshold.
5. The method as claimed in claim 1, wherein said collecting the detection parameters of the standard resistance, the sacrificial anode and the cathode barrel comprises: collecting the voltage drop at two ends of the standard resistor, collecting the working potential, pH and resistivity of the sacrificial anode in the service process, and collecting the working potential of the protected cathode barrel in the service process.
6. The sacrificial anode performance testing method of claim 5, wherein said collecting a voltage drop across said reference resistance comprises: and collecting according to a set period by data collectors connected in parallel at two ends of the standard resistor, and calculating the generation current of the sacrificial anode according to the voltage drop.
7. The method for detecting the performance of the sacrificial anode according to claim 5, wherein the collecting the working potential, the pH value and the resistivity of the sacrificial anode in service comprises: and collecting the working potential, the pH value and the resistivity of the sacrificial anode in the service process through a test tube preset in the vicinity of the sacrificial anode.
8. The method for detecting the performance of the sacrificial anode as claimed in claim 5, wherein the step of collecting the working potential of the cathode barrel in service comprises the following steps: and acquiring the working potential of the cathode barrel in the service process through a reference electrode preset on a salt bridge in the vicinity of the cathode barrel.
9. The sacrificial anode performance detection device is characterized by comprising a reaction container, a filling material, a standard resistor, a data collector, a test tube, a salt bridge and a reference electrode; filling materials are arranged in the reaction container and used for simulating the environment of the protected cathode barrel and the environment of the sacrificial anode; the first end of the standard resistor is electrically connected with the sacrificial anode, and the second end of the standard resistor is electrically connected with the cathode barrel; the data acquisition unit is connected between the first end and the second end of the standard resistor in parallel and is used for acquiring voltage drops at the two ends of the standard resistor according to a set period; the test tube is arranged in the vicinity of the sacrificial anode and used for testing the working potential, the pH value and the resistivity of the sacrificial anode in the service process; the salt bridge is arranged in the vicinity of the cathode barrel; the reference electrode is arranged on the salt bridge and is isolated from the filling material, and is used for testing the working potential of the protected cathode barrel in the service process.
10. The sacrificial anode performance testing device of claim 9, further comprising: a direct current power supply, an auxiliary cathode and a sleeve; the anode of the direct current power supply is electrically connected with the sacrificial anode and is used for electrolyzing the sacrificial anode; the auxiliary cathode is electrically connected with the negative electrode of the direct current power supply in the process of electrolyzing the sacrificial anode; the sleeve is used for being sleeved around the sacrificial anode in the process of electrolyzing the sacrificial anode and used for enabling electrolysis products of the sacrificial anode to gather around the sacrificial anode.
CN202211183857.2A 2022-09-27 2022-09-27 Sacrificial anode performance detection method and device Pending CN115613038A (en)

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