Method for regulating and controlling sediment morphology in process of repairing concrete crack through electro-deposition

Abstract

The invention discloses a method for regulating and controlling sediment morphology in the process of repairing concrete cracks through electro-deposition, which comprises the following steps: firstly, preparing an electrolyte: taking a 0.5 mol / L ZnSO4 solution as a basic electrolyte, and adding hydrogen peroxide (H2O2) in different proportions into the basic electrolyte; h2O2 is added into the ZnSO4 electrolyte, so that dendritic crystal growth in the zinc ion deposition process is effectively inhibited, uniform nucleation and deposition of zinc ions are promoted, and the sealing effect of a deposition product on concrete cracks is improved. The zinc crystal nucleus radius is reduced and the number of the crystal nucleuses is increased in the electrodeposition process, the compactness and uniformity of the sediment are remarkably improved, the sediment component is converted into a mixture of Zn and ZnO2 from single Zn, and the stability and durability of the sediment are further improved. Compared with the prior art, the method can be used for rapidly and compactly filling the concrete crack, the electro-deposition repairing effect is improved, and the method has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of concrete repair technology, specifically a method for controlling the morphology of deposits during the electrodeposition repair of concrete cracks. Background Technology

[0002] Concrete, as the most widely used building material, is prone to cracking due to its brittle nature under external loads, temperature changes, shrinkage, and other factors. Cracks not only affect the aesthetics of concrete structures but also reduce their durability and load-bearing capacity. Especially in marine engineering, cracks provide channels for corrosive media such as chloride ions and moisture, accelerating the corrosion of steel reinforcement and the deterioration of concrete.

[0003] Electrodeposition is a technique suitable for repairing concrete cracks, especially in marine environments. This method utilizes the migration and precipitation characteristics of zinc, magnesium, and calcium ions in seawater under a direct current electric field to generate insoluble deposits that fill the cracks, thus achieving a repair effect. Electrodeposition is not only effective in repairing microcracks but also has good environmental adaptability and economic efficiency. In recent years, electrodeposition has also been explored for repairing concrete cracks in non-marine environments such as tunnels and underground engineering projects. When repairing cracks in non-marine environments, artificially prepared electrolytes such as ZnSO4, ZnCl2, MgSO4, and MgCl2 are generally used. Zinc ion solutions are commonly used electrolytes for electrodeposition repair due to their rapid deposition rate and non-toxicity to the environment. The deposition products of zinc ions in a DC electric field mainly include Zn, Zn(OH)2, and ZnO. The composition of the electrodeposition products is affected by various factors such as pH value, current density, and zinc ion concentration. However, zinc ions tend to form dendritic structures during electrodeposition, resulting in a loose and uneven deposit structure that affects the sealing effect of cracks. Therefore, controlling the deposition morphology of zinc ions to improve the density and uniformity of the deposit has become a key issue in electrodeposition repair technology.

[0004] To address this issue, a method for controlling the morphology of deposits during the electrodeposition repair of concrete cracks is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a method for controlling the morphology of deposits during the electrodeposition repair of concrete cracks. By adding hydrogen peroxide (H2O2), the morphology of zinc ions during the deposition process is controlled, inducing uniform nucleation of zinc ions and inhibiting the growth of irregular zinc dendrites, thereby improving the effect of electrodeposition repair of concrete cracks.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for controlling the morphology of deposits during the electrodeposition repair of concrete cracks, comprising the following steps: Step 1: Prepare electrolyte: Use 0.5 mol / L ZnSO4 solution as the base electrolyte and add hydrogen peroxide (H2O2) in different proportions. Step 2: Electrodeposition repair: The prepared electrolyte is injected into the electrodeposition device, with the steel bars in the concrete as the cathode and the external electrode as the anode, and a DC electric field is applied to perform electrodeposition repair. Step 3: Sediment morphology control: By adding H2O2, the dendritic growth of zinc ions is inhibited, and the uniform nucleation and deposition of zinc ions are promoted. The sediment is mainly transformed from coarse Zn particles to a powdery mixture of Zn and ZnO2, with a particle size of less than 1 micrometer. The microstructure is refined, which is beneficial for the dense filling of cracks. Step 4: Sediment composition analysis: The composition of the sediments was analyzed by X-ray diffraction (XRD). The results showed that without the addition of H2O2, the sediments were mainly Zn; after the addition of H2O2, the sediment composition became a mixture of Zn and ZnO2. Step 5: Sediment morphology observation: The microstructure of the sediments was observed using a scanning electron microscope (SEM). Without the addition of H2O2, the sediments were hexagonal plates with coarse grains and a loose structure. After the addition of H2O2, the sediments were granular with a size of less than 1 micrometer and a dense structure. Step 6: Macroscopic morphological observation: Macroscopic observation revealed that without the addition of H2O2, the sediments grew slowly and were smaller in volume; after the addition of H2O2, the sediments grew faster and generated more sediments in the same amount of time, thus filling the cracks more quickly.

[0007] Preferably, in step 1, the amount of H2O2 added is 0%, 2%, 3%, and 4%, respectively, and the proportion is determined according to the volume fraction of the base electrolyte.

[0008] Preferably, in step 1, the basic electrolyte is mainly composed of calcium acetate or zinc acetate, and is combined with sodium citrate complexing agent to avoid corrosion of the steel bars by strong acid radicals. Sodium bicarbonate is added to adjust pH stability and solve the problem of electrolyte acidification.

[0009] Preferably, in step 2, during the electrodeposition process, the current density is controlled at 0.5 A / m², and the electrodeposition time is 7 days.

[0010] Preferably, in step 2, the external electrode is a titanium substrate coated with a noble metal oxide (such as ruthenium or iridium coating) as the anode and forms a circuit with the steel cathode. This is suitable for acidic electrolyte systems, is resistant to strong acid corrosion, and has significant energy-saving effects.

[0011] Preferably, in step 2, electrodeposition repair is suitable for active concrete cracks with a width of 0.1-1 mm, and is particularly effective for concrete cracks caused by chloride ion erosion.

[0012] Preferably, in step 3, the surface of the concrete crack needs to be kept moist to ensure ion migration efficiency; in a dry environment, moisturizing measures are required.

[0013] Preferably, in step 4, when the deposit is irradiated by X-ray diffraction (XRD), the spacing between the regularly arranged crystal planes of the atoms is comparable to the wavelength of the X-rays, which will produce coherent diffraction at a specific angle, thereby forming a characteristic diffraction pattern of the deposit.

[0014] Preferably, in step 5, the scanning electron microscope (SEM) uses a high-energy electron beam to scan the surface of the sediment and obtains high-resolution sediment microstructure and composition information by detecting signals such as secondary electrons and backscattered electrons.

[0015] Preferably, in step 6, during macroscopic observation, the sediments without H2O2 and with H2O2 are observed under uniform physical conditions such as illumination and angle, thereby ensuring accurate observation.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention patent effectively inhibits dendrite growth during zinc ion deposition by adding H2O2, promoting uniform nucleation and deposition of zinc ions, and improving the density and uniformity of the deposits. Simultaneously, it refines the deposit particles, significantly reducing their size to less than 1 micrometer, resulting in a finer microstructure that facilitates dense filling of cracks and improves crack sealing. Furthermore, it increases the deposition rate, accelerating deposit growth and generating more deposits within the same timeframe, enabling faster crack filling and shortening repair time. Finally, it improves the deposit composition, transforming it from a single Zn composition to a mixture of Zn and ZnO2, further enhancing the stability and durability of the deposits. Attached Figure Description

[0017] Figure 1 This invention relates to the effect of H2O2 doping on sediment composition. Figure 2 This invention relates to the effect of H2O2 doping on the microstructure of sediments. Figure 3 This invention relates to the effect of H2O2 doping on the macroscopic morphology of sediments. Detailed Implementation

[0018] The present invention will now be described in more detail by way of examples. These examples are merely illustrative and do not limit the scope of the present invention in any way.

[0019] This invention provides a technical solution: a method for controlling the morphology of deposits during the electrodeposition repair of concrete cracks, comprising the following steps: Step 1: Prepare electrolyte: Use 0.5 mol / L ZnSO4 solution as the base electrolyte and add hydrogen peroxide (H2O2) in different proportions. Step 2: Electrodeposition repair: The prepared electrolyte is injected into the electrodeposition device, with the steel bars in the concrete as the cathode and the external electrode as the anode, and a DC electric field is applied to perform electrodeposition repair. Step 3: Sediment morphology control: By adding H2O2, the dendritic growth of zinc ions is inhibited, and the uniform nucleation and deposition of zinc ions are promoted. The sediment is mainly transformed from coarse Zn particles to a powdery mixture of Zn and ZnO2, with a particle size of less than 1 micrometer. The microstructure is refined, which is beneficial for the dense filling of cracks. Step 4: Sediment composition analysis: The composition of the sediments was analyzed by X-ray diffraction (XRD). The results showed that without the addition of H2O2, the sediments were mainly Zn; after the addition of H2O2, the sediment composition became a mixture of Zn and ZnO2. Step 5: Sediment morphology observation: The microstructure of the sediments was observed using a scanning electron microscope (SEM). Without the addition of H2O2, the sediments were hexagonal plates with coarse grains and a loose structure. After the addition of H2O2, the sediments were granular with a size of less than 1 micrometer and a dense structure. Step 6: Macroscopic morphological observation: Macroscopic observation revealed that without the addition of H2O2, the sediments grew slowly and were smaller in volume; after the addition of H2O2, the sediments grew faster and generated more sediments in the same amount of time, thus filling the cracks more quickly.

[0020] In this embodiment, H2O2 is used as an electrolyte additive to promote uniform zinc deposition. The changes in nucleation rate, deposit composition, and microstructure of zinc ions after adding 0%, 2%, 3%, and 4% H2O2 to a 0.5 mol / L ZnSO4 electrolyte are investigated.

[0021] The addition of H₂O₂ inhibited the dendritic deposition and growth of Zn ions. The main component of the sediment changed from coarse-grained Zn to a mixture of powdery Zn and ZnO₂. At the microscale, the addition of H₂O₂ resulted in sediment particles smaller than 1 μm, refining the sediment's microstructure and facilitating fracture sealing.

[0022] refer to Figure 1 In the ZnSO4 electrolyte, the deposits are predominantly Zn. After the addition of hydrogen peroxide, the composition becomes Zn and ZnO2.

[0023] refer to Figure 2In ZnSO4 electrolyte, the Zn deposits exhibit a hexagonal plate-like microstructure with coarse grains and a loose structure. After incorporation of hydrogen peroxide, the deposits become granular with a size less than 1 μm.

[0024] refer to Figure 3 In ZnSO4 electrolyte, the macroscopic morphology of Zn deposits is granular, which is due to dendrite growth. Deposits grow slowly and are small in size. Incorporation of hydrogen peroxide accelerates deposit growth, generating more products within the same deposition time, thus filling cracks more quickly.

[0025] Example 1: First, the electrolyte is prepared: using a 0.5 mol / L ZnSO4 solution as the base electrolyte, different proportions of hydrogen peroxide (H2O2) are added to it; then, electrodeposition repair is performed: the prepared electrolyte is injected into the electrodeposition device, with the steel bars in the concrete as the cathode and the external electrode as the anode, and a DC electric field is applied for electrodeposition repair; after that, the morphology of the deposit is controlled: by adding H2O2, the dendritic growth of zinc ions is inhibited, and the uniform nucleation and deposition of zinc ions are promoted. The sediments primarily transformed from coarse Zn particles to a powdery mixture of Zn and ZnO2, with particle sizes smaller than 1 micrometer. This refinement of the microstructure facilitated the dense filling of cracks. Subsequent sediment composition analysis, using X-ray diffraction (XRD), revealed that without H2O2, the sediments were predominantly Zn; with H2O2, the composition became a mixture of Zn and ZnO2. Morphological observation, using scanning electron microscopy (SEM), showed that without H2O2, the sediments were hexagonal plates with coarse grains and a loose structure; with H2O2, the sediments became granular, smaller than 1 micrometer, and had a denser structure. Finally, macroscopic observation revealed that without H2O2, sediment growth was slow and the volume was small; with H2O2, sediment growth accelerated, producing more sediment within the same timeframe for faster crack filling.

[0026] Example 2: In Example 1, the following steps are added: In step 1, the amount of H2O2 added is 0%, 2%, 3%, and 4%, respectively, and the proportion is determined according to the volume fraction of the base electrolyte. The main components of the base electrolyte are calcium acetate or zinc acetate, and sodium citrate complexing agent is added to avoid corrosion of the steel bars by strong acid radicals. Sodium bicarbonate is added to adjust the pH stability and solve the problem of electrolyte acidification.

[0027] First, the electrolyte is prepared: a 0.5 mol / L ZnSO4 solution is used as the base electrolyte, and different proportions of hydrogen peroxide (H2O2) are added. The amounts of H2O2 added are 0%, 2%, 3%, and 4%, respectively, depending on the volume fraction of the base electrolyte. The base electrolyte mainly consists of calcium acetate or zinc acetate, and sodium citrate is added as a complexing agent to prevent strong acid ions from corroding the steel reinforcement. Sodium bicarbonate is added to adjust pH stability and solve the problem of electrolyte acidification. Then, electrodeposition repair is performed: the prepared electrolyte is injected into the electrodeposition device, using the steel reinforcement in the concrete as the cathode and the external electrode as the anode, and a DC electric field is applied for electrodeposition repair. Afterward, the morphology of the deposit is controlled: by adding H2O2, the dendritic growth of zinc ions is inhibited, and the uniform nucleation and deposition of zinc ions are promoted. The sediments primarily transformed from coarse Zn particles to a powdery mixture of Zn and ZnO2, with particle sizes smaller than 1 micrometer. This refinement of the microstructure facilitated the dense filling of cracks. Subsequent sediment composition analysis, using X-ray diffraction (XRD), revealed that without H2O2, the sediments were predominantly Zn; with H2O2, the composition became a mixture of Zn and ZnO2. Morphological observation, using scanning electron microscopy (SEM), showed that without H2O2, the sediments were hexagonal plates with coarse grains and a loose structure; with H2O2, the sediments became granular, smaller than 1 micrometer, and had a denser structure. Finally, macroscopic observation revealed that without H2O2, sediment growth was slow and the volume was small; with H2O2, sediment growth accelerated, producing more sediment within the same timeframe for faster crack filling.

[0028] Example 3: In Example 2, the following additional steps are added: In step 2, during the electrodeposition process, the current density is controlled at 0.5 A / m², and the electrodeposition time is 7 days. The external electrode uses a titanium substrate coated with noble metal oxides (such as ruthenium or iridium coating) as the anode and forms a circuit with the steel cathode. It is suitable for acidic electrolyte systems, resistant to strong acid corrosion, and has significant energy-saving effects. Electrodeposition repair is suitable for active concrete cracks with a width of 0.1-1 mm, and is especially effective for concrete cracks caused by chloride ion erosion.

[0029] In step 3, the surface of the concrete cracks must be kept moist to ensure ion migration efficiency; in dry environments, moisturizing measures are required.

[0030] First, prepare the electrolyte: use a 0.5 mol / L ZnSO4 solution as the base electrolyte, and add different proportions of hydrogen peroxide (H2O2); the amount of H2O2 added is 0%, 2%, 3%, and 4%, and the proportion is determined according to the volume fraction of the base electrolyte; the main components of the base electrolyte are calcium acetate or zinc acetate, and sodium citrate complexing agent is added to avoid corrosion of the steel bars by strong acid ions. Sodium bicarbonate is added to adjust the pH stability and solve the problem of electrolyte acidification. Then, electrodeposition repair is performed: the prepared electrolyte is injected into the electrodeposition device, with the steel reinforcement in the concrete as the cathode and the external electrode as the anode, and a DC electric field is applied for electrodeposition repair; during the electrodeposition process, the current density is controlled at 0.5 A / m², and the electrodeposition time is 7 days; the external electrode uses a titanium substrate coated with noble metal oxides (such as ruthenium or iridium coating) as the anode and forms a circuit with the steel reinforcement cathode, which is suitable for acidic electrolyte systems, resistant to strong acid corrosion, and has significant energy-saving effects; electrodeposition repair is suitable for active concrete cracks with a width of 0.1-1 mm, especially effective for concrete cracks caused by chloride ion erosion. Afterwards, the morphology of the deposits is controlled: by adding H₂O₂, the dendritic growth of zinc ions is inhibited, and the uniform nucleation and deposition of zinc ions are promoted. The deposits mainly change from coarse Zn particles to a powdery mixture of Zn and ZnO₂, with a particle size of less than 1 micrometer, and the microstructure is refined, which is beneficial for the dense filling of cracks; it is necessary to keep the surface of the concrete cracks moist to ensure ion migration efficiency, and moisturizing measures are required in dry environments. Next, sediment composition analysis was conducted: X-ray diffraction (XRD) analysis of the sediment composition showed that without the addition of H2O2, the sediment was mainly Zn; after the addition of H2O2, the sediment composition became a mixture of Zn and ZnO2. Sediment morphology observation followed: Scanning electron microscopy (SEM) was used to observe the microstructure of the sediment. Without H2O2, the sediment was hexagonal plate-like with coarse grains and a loose structure; after the addition of H2O2, the sediment was granular with a size less than 1 micrometer and a dense structure. Finally, macroscopic morphology observation revealed that without the addition of H2O2, the sediment grew slowly and was smaller in volume; after the addition of H2O2, the sediment growth accelerated, generating more sediment in the same amount of time to fill the cracks more quickly.

[0031] Example 4: In Example 3, the following steps are added: In step 4, when the deposit is irradiated by X-ray diffraction (XRD), the spacing between the regularly arranged crystal planes of the atoms is comparable to the wavelength of the X-rays, which will produce coherent diffraction at a specific angle, thereby forming the characteristic diffraction pattern of the deposit.

[0032] In step 5, the scanning electron microscope (SEM) uses a high-energy electron beam to scan the surface of the sediment and obtains high-resolution information on the microstructure and composition of the sediment by detecting signals such as secondary electrons and backscattered electrons.

[0033] In step 6, during macroscopic observation, the sediments without H2O2 and with H2O2 are observed under uniform physical conditions such as illumination and angle, thus ensuring accurate observation.

[0034] First, prepare the electrolyte: use a 0.5 mol / L ZnSO4 solution as the base electrolyte, and add different proportions of hydrogen peroxide (H2O2); the amount of H2O2 added is 0%, 2%, 3%, and 4%, and the proportion is determined according to the volume fraction of the base electrolyte; the main components of the base electrolyte are calcium acetate or zinc acetate, and sodium citrate complexing agent is added to avoid corrosion of the steel bars by strong acid ions. Sodium bicarbonate is added to adjust the pH stability and solve the problem of electrolyte acidification. Then, electrodeposition repair is performed: the prepared electrolyte is injected into the electrodeposition device, with the steel reinforcement in the concrete as the cathode and the external electrode as the anode, and a DC electric field is applied for electrodeposition repair; during the electrodeposition process, the current density is controlled at 0.5 A / m², and the electrodeposition time is 7 days; the external electrode uses a titanium substrate coated with noble metal oxides (such as ruthenium or iridium coating) as the anode and forms a circuit with the steel reinforcement cathode, which is suitable for acidic electrolyte systems, resistant to strong acid corrosion, and has significant energy-saving effects; electrodeposition repair is suitable for active concrete cracks with a width of 0.1-1 mm, especially effective for concrete cracks caused by chloride ion erosion. Afterwards, the morphology of the deposits is controlled: by adding H₂O₂, the dendritic growth of zinc ions is inhibited, and the uniform nucleation and deposition of zinc ions are promoted. The deposits mainly change from coarse Zn particles to a powdery mixture of Zn and ZnO₂, with a particle size of less than 1 micrometer, and the microstructure is refined, which is beneficial for the dense filling of cracks; it is necessary to keep the surface of the concrete cracks moist to ensure ion migration efficiency, and moisturizing measures are required in dry environments. Subsequent sediment composition analysis was conducted: X-ray diffraction (XRD) analysis revealed that without H2O2, the sediment was primarily Zn; with the addition of H2O2, the sediment composition became a mixture of Zn and ZnO2. When X-ray diffraction (XRD) irradiated the sediment, the regularly arranged interplanar spacing of the atoms, comparable to the X-ray wavelength, produced coherent diffraction at specific angles, thus forming the sediment's characteristic diffraction pattern. Next, sediment morphology observation was performed: Scanning electron microscopy (SEM) was used to observe the microstructure of the sediment. Without H2O2, the sediment exhibited a hexagonal plate-like structure with coarse grains and a loose structure; with the addition of H2O2, the sediment became granular, with a size less than 1 micrometer and a dense structure. Scanning electron microscopy (SEM) uses a high-energy electron beam to scan the sediment surface and detects secondary electrons and backscattered electrons, thereby obtaining high-resolution microstructure and compositional information of the sediment. Finally, macroscopic morphological observation was conducted: macroscopic observation revealed that without the addition of H2O2, the sediments grew slowly and were smaller in volume; after the addition of H2O2, the sediments grew faster, generating more sediments in the same amount of time to fill the cracks more quickly; during macroscopic observation, sediments without and with the addition of H2O2 were observed under uniform physical conditions such as illumination and angle to ensure accurate observation.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for controlling the morphology of deposits during electrodeposition repair of concrete cracks, characterized in that: The following steps are involved: Step 1: Prepare electrolyte: Use 0.5 mol / L ZnSO4 solution as the base electrolyte and add hydrogen peroxide (H2O2) in different proportions. Step 2: Electrodeposition repair: The prepared electrolyte is injected into the electrodeposition device, with the steel bars in the concrete as the cathode and the external electrode as the anode, and a DC electric field is applied to perform electrodeposition repair. Step 3: Sediment morphology control: By adding H2O2, the dendritic growth of zinc ions is inhibited, and the uniform nucleation and deposition of zinc ions are promoted. The sediment is mainly transformed from coarse Zn particles to a powdery mixture of Zn and ZnO2, with a particle size of less than 1 micrometer. The microstructure is refined, which is beneficial for the dense filling of cracks. Step 4: Sediment composition analysis: The composition of the sediments was analyzed by X-ray diffraction (XRD). The results showed that without the addition of H2O2, the sediments were mainly Zn; after the addition of H2O2, the sediment composition became a mixture of Zn and ZnO2. Step 5: Sediment morphology observation: The microstructure of the sediments was observed using a scanning electron microscope (SEM). Without the addition of H2O2, the sediments were hexagonal plates with coarse grains and a loose structure. After the addition of H2O2, the sediments were granular with a size of less than 1 micrometer and a dense structure. Step 6: Macroscopic morphological observation: Macroscopic observation revealed that without the addition of H2O2, the sediments grew slowly and were smaller in volume; after the addition of H2O2, the sediments grew faster and generated more sediments in the same amount of time, thus filling the cracks more quickly.

2. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 1, the amounts of H2O2 added are 0%, 2%, 3%, and 4%, respectively, and the proportions are determined according to the volume fraction of the base electrolyte.

3. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 1, the basic electrolyte is mainly composed of calcium acetate or zinc acetate, and is combined with sodium citrate complexing agent to avoid corrosion of steel bars by strong acid radicals. Sodium bicarbonate is added to adjust pH stability and solve the problem of electrolyte acidification.

4. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 2, during the electrodeposition process, the current density is controlled at 0.5 A / m², and the electrodeposition time is 7 days.

5. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 2, the external electrode uses a titanium substrate coated with noble metal oxides (such as ruthenium or iridium coating) as the anode and forms a circuit with the steel cathode. This is suitable for acidic electrolyte systems, is resistant to strong acid corrosion, and has significant energy-saving effects.

6. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 2, electrodeposition repair is applicable to active concrete cracks with a width of 0.1-1 mm, and is particularly effective for concrete cracks caused by chloride ion erosion.

7. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 3, the surface of the concrete cracks must be kept moist to ensure ion migration efficiency. In dry environments, moisturizing measures are required.

8. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 4, when the deposit is irradiated by X-ray diffraction (XRD), the spacing between the regularly arranged crystal planes of the atoms is comparable to the wavelength of the X-rays, which will produce coherent diffraction at a specific angle, thereby forming a characteristic diffraction pattern of the deposit.

9. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 5, the scanning electron microscope (SEM) uses a high-energy electron beam to scan the surface of the sediment and obtains high-resolution microstructure and composition information of the sediment by detecting signals such as secondary electrons and backscattered electrons.

10. The method for controlling the morphology of deposits during electrodeposition repair of concrete cracks according to claim 1, characterized in that: In step 6, during macroscopic observation, the sediments without H2O2 and with H2O2 are observed under uniform physical conditions such as illumination and angle, thereby ensuring accurate observation.

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