Galvanized steel surface corrosion cleaning method

Abstract

The invention relates to the technical field of galvanized steel surface cleaning, in particular to a galvanized steel surface corrosion cleaning method which comprises the step of cleaning the galvanized steel surface after a corrosion experiment through different cleaning medium solutions. Performing X-ray diffraction, scanning electron microscope and three-dimensional topography instrument analysis on the cleaned galvanized steel subjected to the corrosion experiment to obtain surface topography and three-dimensional surface contour analysis results of the galvanized steel subjected to the corrosion experiment; and combining the surfaces cleaned by different cleaning media with the surface analysis result, analyzing the influence degree of the galvanized steel surface cleaned by different media, and detecting and judging the surface cleaning degree of the galvanized steel. According to the galvanized steel surface corrosion cleaning method, cleaning is conducted through different cleaning medium solutions, X-ray diffraction, a scanning electron microscope and a three-dimensional topography instrument are combined, the cleaning degree of the metal surface is accurately represented, and the corrosion condition of galvanized steel can be accurately judged.

Description

Technical Field

[0001] The invention relates to the technical field of galvanized steel surface cleaning, and in particular to a method for cleaning galvanized steel surface corrosion. Background Art

[0002] In response to the phenomenon of rapid failure of some galvanized parts in power projects in the power grid, it is necessary to carry out corrosion resistance evaluation of the coating such as neutral salt spray test. The salt spray test of galvanized steel is a test method used to evaluate the corrosion resistance of materials or coatings in marine or salty environments. This test simulates the corrosion effect of salt spray (mainly sodium chloride) on the material to predict the corrosion resistance of the material under actual use conditions.

[0003] Since the neutral salt spray test takes too long and requires large-scale salt spray test equipment, few provincial grid companies actually carry out this test; at the same time, this method cannot be carried out on site, so it is difficult to use it in actual engineering to evaluate the corrosion resistance of the galvanized layer and it is difficult to guide the lean operation and maintenance of power grid equipment. Generally, in order to quickly corrode, it is necessary to add oxidants to the corrosive solution or increase the acid and salt concentrations.

[0004] After the test, the sample needs to be cleaned and then inspected and rated. Currently, it is mainly cleaned with clean running water not higher than 40°C to remove the residue of salt spray solution on the surface of the sample. It is difficult to accurately remove the residue on the surface of the metal after corrosion. Summary of the invention

[0005] In view of the problems existing in the above-mentioned existing galvanized steel surface corrosion cleaning method, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a method for cleaning the surface corrosion of galvanized steel, and its purpose is to provide a method for quickly cleaning the surface of galvanized steel before the corrosion degree is detected.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for cleaning the surface corrosion of galvanized steel, comprising:

[0008] The galvanized steel surface after the corrosion test was cleaned by different cleaning medium solutions;

[0009] X-ray diffraction, scanning electron microscopy and three-dimensional topography analysis are performed on the cleaned galvanized steel after the corrosion test to obtain the surface morphology and three-dimensional surface profile analysis results of the galvanized steel after the corrosion test; and,

[0010] The surfaces after cleaning with different cleaning media are combined with the surface analysis results to analyze the degree of influence on the galvanized steel surface under cleaning with different media, and to detect and judge the surface cleaning degree of the galvanized steel.

[0011] As a preferred embodiment of the method for cleaning the surface corrosion of galvanized steel of the present invention, different cleaning medium solutions are simulated, and the galvanized steel is placed in the cleaning solution after being tested in the corrosion solution, and ultrasonic cleaning is performed to obtain a clean surface.

[0012] As a preferred embodiment of the method for cleaning the surface corrosion of galvanized steel of the present invention, a surfactant is added to the cleaning solution, and the cleaning temperature is 298-308K.

[0013] As a preferred embodiment of the method for cleaning galvanized steel surface corrosion according to the present invention, the surfactant is specifically ethylene glycol.

[0014] As a preferred embodiment of the method for cleaning the surface corrosion of galvanized steel of the present invention, the cleaning medium is specifically an organic solvent, and a pure organic solvent is used.

[0015] As a preferred embodiment of the method for cleaning the surface corrosion of galvanized steel of the present invention, 100 ml of an organic solvent is weighed into a 250 ml beaker, 30-50 ml of an ethylene glycol solution is added, and the mixture is stirred at room temperature for 0.5 h to obtain a cleaning solution;

[0016] The galvanized steel after the salt spray test was placed in the cleaning solution and subjected to ultrasonic treatment for 15 minutes. The steel was then taken out and cleaned twice with deionized water and placed in a drying dish for observation.

[0017] As a preferred embodiment of the method for cleaning the surface corrosion of galvanized steel described in the present invention, X-ray diffraction is performed on the galvanized steel after the corrosion experiment after cleaning to obtain the crystal structure and physical phase of the galvanized steel, and the spatial lattice structure of the crystal is determined by analyzing the characteristic peaks in the diffraction spectrum, and the lattice parameters are measured to obtain the product characteristics of the galvanized steel surface after corrosion.

[0018] As a preferred solution of the galvanized steel surface corrosion cleaning method described in the present invention, wherein: through scanning electron microscopy and three-dimensional topography analysis, high-resolution surface morphology images and three-dimensional surface morphology images of the galvanized steel surface after the corrosion experiment are obtained, and the surface roughness of the galvanized steel is calculated. The greater the surface roughness, the more severe the corrosion degree of the galvanized steel.

[0019] As a preferred embodiment of the method for cleaning the surface corrosion of galvanized steel of the present invention, the corrosion resistance of the galvanized steel is evaluated by comparing the test results of the surface cleanliness with different cleaning media, different corrosion degrees, surfactants and ultrasound.

[0020] As a preferred embodiment of the method for cleaning the surface corrosion of galvanized steel of the present invention, ultrasound is performed while the cleaning is performed.

[0021] Beneficial effects of the present invention: The present invention uses different cleaning medium solutions for cleaning, and combines the methods of X-ray diffraction, scanning electron microscopy and three-dimensional morphology to accurately characterize the cleanliness of the metal surface, and can accurately determine the corrosion condition of galvanized steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a flow chart of the steps of a method for detecting the cleaning degree of galvanized steel using different cleaning agents after a salt spray test in an embodiment of the present invention;

[0024] Figure 2 The XRD patterns of the galvanized sheet after the salt spray test in the embodiment of the present invention after being cleaned with ethanol (a), acetone (b) and ethyl acetate (c) cleaning agents;

[0025] Figure 3 The SEM images, EDS analysis and three-dimensional optical profiling analysis of the galvanized sheet after the salt spray test in the embodiment of the present invention after cleaning with ethanol (a), acetone (b) and ethyl acetate (c);

[0026] Figure 4 They are respectively XRD diagrams of the galvanized sheet after different salt spray tests in the embodiment of the present invention and after being cleaned with an ethanol cleaning agent;

[0027] Figure 5 The SEM images, EDS analysis and three-dimensional optical profile analysis of the galvanized sheet after different salt spray tests in the embodiment of the present invention after being cleaned with an ethanol cleaning agent;

[0028] Figure 6 The XRD patterns of the galvanized sheet after the fixed-point salt spray test and after cleaning with ethanol detergent, with ultrasound (a) and without ultrasound (b);

[0029] Figure 7 SEM images, EDS analysis and 3D optical contour analysis of the galvanized sheet after the fixed-point salt spray test and after cleaning with ethanol detergent, with ultrasound (a) and without ultrasound (b). DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0034] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a method for cleaning corrosion on the surface of galvanized steel, the method comprising:

[0035] S1: The galvanized steel surface after the corrosion test was cleaned by different cleaning medium solutions;

[0036] Among them, different cleaning medium solutions are configured to simulate the experiment. The galvanized steel is placed in the cleaning solution after being tested in the corrosion solution, and ultrasonic cleaning is performed to obtain a clean surface.

[0037] Furthermore, the cleaning medium is specifically an organic solvent, and a pure organic solvent is used, and the specific organic solution is ethanol, acetone, ethyl acetate or petroleum ether.

[0038] The cleaning solution is prepared as follows: weigh 100 ml of an organic solvent (ethanol, acetone, ethyl acetate or petroleum ether) into a 250 ml beaker, add 30-50 ml of ethylene glycol solution, and stir at room temperature for 0.5 h to obtain a cleaning solution.

[0039] The galvanized steel after the salt spray test was then placed in the cleaning solution and subjected to ultrasonic treatment for 15 minutes. The steel was then taken out, cleaned twice with deionized water, and placed in a drying dish for observation.

[0040] Furthermore, a surfactant is added to the cleaning solution, and the cleaning temperature is 298-308K, wherein the surfactant is specifically ethylene glycol.

[0041] S2: X-ray diffraction, scanning electron microscopy and three-dimensional topography analysis are performed on the cleaned galvanized steel after the corrosion experiment to obtain the surface morphology and three-dimensional surface profile analysis results of the galvanized steel after the corrosion experiment, so as to intuitively characterize the crystal structure, phase analysis and morphology of the galvanized steel surface after the corrosion experiment;

[0042] Among them, X-ray diffraction is performed on the galvanized steel after the corrosion experiment after cleaning to obtain the crystal structure and physical phase of the galvanized steel. By analyzing the characteristic peaks in the diffraction spectrum, the spatial lattice structure of the crystal can be determined and the lattice parameters can be measured. It can be compared with the standard card to obtain the product characteristics after the galvanized steel surface is corroded.

[0043] Furthermore, through scanning electron microscopy and three-dimensional topography analysis, high-resolution surface topography and three-dimensional surface topography of the galvanized steel surface after the corrosion experiment were obtained, and the surface roughness of the galvanized steel was calculated;

[0044] In the surface morphology diagram, the more corrosion marks appear, the more serious the corrosion of the galvanized steel;

[0045] In the three-dimensional contour diagram, the surface roughness of the galvanized steel is calculated. The greater the surface roughness, the more serious the corrosion degree of the galvanized steel.

[0046] S3: Combine the surface after cleaning with different cleaning media with the surface analysis results, analyze the degree of influence on the galvanized steel surface under different cleaning media, and detect and judge the surface cleaning degree of the galvanized steel.

[0047] Among them, the corrosion degree of the galvanized steel surface after the salt spray test is analyzed. Specifically, by comparing the test results of different cleaning media, different corrosion degrees, surfactants, and ultrasound on surface cleanliness, the corrosion resistance of the galvanized steel is evaluated; and ultrasonic operation is performed while cleaning.

[0048] Furthermore, a standardized or unified detection process can be formed, as follows:

[0049] 1. Preparation:

[0050] (1) Cutting of galvanized steel samples after salt spray test.

[0051] (2) Use organic solvents and surfactants to prepare different cleaning solutions and control the temperature.

[0052] 2. Cleaning liquid for galvanized steel after salt spray test:

[0053] (1) Weigh 100 ml of organic solvent (ethanol, acetone, ethyl acetate or petroleum ether) into a 250 ml beaker, add 30-50 ml of ethylene glycol solution, and stir at room temperature for 0.5 h to obtain a cleaning solution.

[0054] (2) Place the galvanized steel after the salt spray test in the cleaning solution and ultrasonicate for 15 minutes. Then take it out, wash it twice with deionized water, and place it in a drying dish for observation.

[0055] 3.XRD analysis:

[0056] (1) Obtain the X-ray diffraction pattern of the corrosion surface after cleaning by XRD.

[0057] (2) Observe and record the corrosion, and determine the corrosion surface characteristics before and after the composition of the corrosion products by comparing the position, intensity, and width of the diffraction peaks in the reference standard.

[0058] 4.SEM analysis:

[0059] (1) High-resolution surface morphology images of the galvanized steel surface after cleaning and salt spray test were obtained by SEM.

[0060] (2) Observe and record the surface corrosion characteristics of the cleaned galvanized steel surface.

[0061] 5. Three-dimensional morphology analysis:

[0062] (1) The three-dimensional surface morphology of the galvanized steel surface in the salt spray test after cleaning was obtained by a three-dimensional optical profilometer.

[0063] (2) Observe and record the corrosion roughness of the galvanized steel surface.

[0064] 6. Data integration and analysis:

[0065] (1) Combine the XRD test data with the SEM and 3D surface profile analysis results to create a data file.

[0066] (2) Comprehensively evaluate the corrosion behavior under different corrosion conditions and determine the corrosion resistance of galvanized steel.

[0067] Example 2, reference Figure 2 and Figure 3 , which is the second embodiment of the present invention, this embodiment uses galvanized steel after the same salt spray test at a fixed point as the substrate, and organic solvents ethanol, acetone and ethyl acetate as the research objects, and specifically includes the following steps:

[0068] (1) Sample pretreatment and solution preparation:

[0069] Weigh 100 ml of organic solvent (ethanol, acetone and ethyl acetate) in a 250 ml beaker, add 50 ml of ethylene glycol solution, stir at room temperature for 0.5 h to obtain a cleaning agent. Then put the galvanized steel after the salt spray test in the cleaning solution, take it out after ultrasonic treatment for 15 minutes, wash it twice with deionized water, and place it in a drying dish for observation.

[0070] (2) XRD analysis:

[0071] After the corrosion experiment with different cleaning agents, the galvanized steel was subjected to X-ray diffraction to obtain the characteristic peaks in the diffraction spectrum of the galvanized steel. The spatial lattice structure of the crystal can be determined and the lattice parameters can be measured. The results can be compared with the standard card to obtain the product characteristics after the galvanized steel surface is corroded.

[0072] refer to Figure 2 The figure shows the XRD patterns of galvanized sheets after salt spray test and after cleaning with different cleaning agents. Figure 2 In a, it can be seen that the diffraction peaks on the surface of the galvanized sheet after ethanol cleaning are more and stronger, indicating that the corrosion products are not completely removed, and more zinc oxide (ZnO) and other corrosion products remain. The broad peak phenomenon may indicate that the corrosion product layer is thicker, the particle size is smaller, and the cleaning effect is relatively poor. Figure 2 b shows that after acetone cleaning, the diffraction peak is significantly weakened, indicating that most of the corrosion products have been removed, but there is still some residual ZnO and a small amount of iron oxide. The diffraction peak is relatively narrow, indicating that the corrosion layer is thin, the particle size is large, and the cleaning effect is relatively good. Figure 2 The diffraction peak in c is relatively narrow, indicating that the corrosion layer is thin, the particle size is large, and the cleaning effect is relatively good. The diffraction peak is extremely narrow, indicating that the surface is flat after cleaning, there are few corrosion products, and the particle size is increased. In summary, ethyl acetate has the best cleaning effect on galvanized sheet, can remove corrosion products most thoroughly, and the surface features are the flattest after cleaning. Ethanol has the worst cleaning effect, and more corrosion products remain.

[0073] (3) Corrosion morphology analysis:

[0074] The surface morphology and 3D profile of galvanized steel corresponding to different cleaning agents were obtained using a scanning electron microscope (SEM) and a 3D optical profiler. Figure 3 . Observe the corrosion pits, cracks and other corrosion features. By comparing the morphological changes of the samples before and after corrosion, it can be evaluated which cleaning agent is most suitable for the metal. Figure 3 In the SEM image, Figure 3 a The surface of the steel sheet after ethanol cleaning is severely corroded, with dense corrosion pits and cracks, and the surface is extremely rough; Figure 3 In b, the corrosion marks are weakened, but the corrosion is still obvious; Figure 3 The cracks on the ethyl acetate-cleaned surface corresponding to c are shallower than those of the previous two, and no corrosion pits appear. EDS element analysis also shows that the surface metal oxides are reduced after ethyl acetate cleaning, and the clarity is the best. The three-dimensional optical surface profiler analyzes the surface profile of the samples before and after corrosion and compares their surface roughness. Figure 3a The surface roughness (Sa) is 7.846 μm, and as the cleaning agent changes, the surface Sa value decreases, indicating that the surface roughness of galvanized steel becomes smaller from left to right, and the cleaning degree becomes better, which is consistent with the previous SEM analysis.

[0075] After evaluation, it was concluded that ethyl acetate has the best cleaning effect on organic pollutants on the surface of galvanized steel, and it is highly volatile and suitable for rapid cleaning of organic pollutants.

[0076] Example 3, reference Figure 4 and Figure 5 , which is the third embodiment of the present invention, this embodiment uses ethanol as a cleaning agent, takes the galvanized sheet after the fixed-point test and the full-range test salt spray test as the research object, and specifically includes the following steps:

[0077] (1) Sample pretreatment and solution preparation:

[0078] Weigh 100 ml of organic solvent (ethanol) in a 250 ml beaker, add 30 ml of ethylene glycol solution, and stir at room temperature for 0.5 h to obtain a cleaning agent. Then put the two galvanized steels after the salt spray test in the cleaning solution, take them out after ultrasonic treatment for 15 minutes, wash them twice with deionized water, and place them in a drying dish for observation.

[0079] (2) XRD analysis:

[0080] After different corrosion experiments, the galvanized steel cleaned with the same cleaning agent ethanol was subjected to X-ray diffraction to obtain the characteristic peaks in the diffraction spectrum of the galvanized steel. The spatial lattice structure of the crystal can be determined and the lattice parameters can be measured. The results can be compared with the standard card to obtain the product characteristics of the galvanized steel surface after corrosion.

[0081] refer to Figure 4 The figure shows the XRD patterns of galvanized sheets after salt spray test and cleaning with different cleaning agents. Figure 4 In b, it can be seen that the surface diffraction peaks of the galvanized sheet after cleaning in the full range test are more and stronger, indicating that the corrosion products are not completely removed compared with the fixed point test, and more zinc oxide (ZnO) and other corrosion products remain. The wide peak phenomenon may indicate that the corrosion product layer is thicker, the particle size is smaller, and the cleaning effect is relatively poor. Figure 4 a The diffraction peak is narrower, indicating that the surface of the galvanized sheet is cleaned more smoothly after the fixed-point test, with fewer corrosion products and larger particle size. In summary, the corrosion products on the surface of the galvanized sheet are more uniform after the fixed-point test, the cleaning effect will be better, the corrosion products can be removed more thoroughly, and the surface features are the smoothest. The cleaning effect of the surface after the full-range test is the worst, with more corrosion products remaining.

[0082] (3) Corrosion morphology analysis:

[0083] Scanning electron microscope (SEM) and 3D optical surface profiler were used to obtain the surface morphology of the sample after corrosion, and the corrosion pits, cracks and other corrosion features were observed. The morphology and roughness changes of the samples before and after corrosion were compared, and combined with the electrochemical test results, the corrosion behavior under different corrosion conditions was comprehensively evaluated.

[0084] contrast Figure 5 The SEM images and EDS spectra in a and 5b clearly show that the surface of the steel sheet after the full-range test is severely corroded, with dense corrosion pits and cracks, and the surface is extremely rough and uneven, indicating that the cleaning agent can more effectively clean the corrosion products on its surface after the fixed-point test. Figure 5 aSurface roughness (Sa) is 7.846 μm, Figure 5 b The surface roughness (Sa) is 9.651 μm, which once again verifies that the cleaning degree after the fixed-point test is better.

[0085] After evaluation, it was concluded that the organic pollutants on the surface of galvanized steel after fixed-point testing were relatively uniform, and the cleaning effect was best achieved using detergents, which was suitable for the salt spray test method to improve the cleanliness of organic pollutants in the later stage.

[0086] Example 4, reference Figure 6 and Figure 7 , which is the second embodiment of the present invention. This embodiment uses ethanol as a cleaning agent, and tests the galvanized sheet after the salt spray test at a fixed point as a substrate, and takes whether ultrasonic cleaning is performed after rinsing with the cleaning agent as a research object. The specific steps include:

[0087] (1) Sample pretreatment and solution preparation:

[0088] Weigh 100 ml of organic solvent (ethanol) in a 250 ml beaker, add 30-50 ml of ethylene glycol solution, stir at room temperature for 0.5 h to obtain a cleaning solution. Then put the galvanized steel after the fixed-point salt spray test in the cleaning solution, take it out after ultrasonic treatment for 15 minutes, wash it twice with deionized water, and place it in a drying dish for observation.

[0089] (2) XRD analysis

[0090] refer to Figure 6 The figure shows the XRD pattern of the galvanized sheet after the fixed-point salt spray test and after cleaning with ethanol detergent, with ultrasound and without ultrasound. Figure 6 In b, it can be seen that the surface diffraction peaks of the galvanized sheet after cleaning are more and stronger, indicating that the corrosion products are not completely removed after ultrasound, and more zinc oxide (ZnO) and other corrosion products remain. The wide peak phenomenon may indicate that the corrosion product layer is thicker, the particle size is smaller, and the cleaning effect is relatively poor. Figure 6a The diffraction peak is narrower, indicating that the surface of the galvanized sheet is smoother after ultrasonic cleaning, with fewer corrosion products and larger particle size. In summary, the cleaning effect of corrosion products on the surface of the galvanized sheet after ultrasonic cleaning will be better, and the corrosion products can be removed more thoroughly, and the surface features are the smoothest.

[0091] (3) Corrosion morphology analysis:

[0092] contrast Figure 7 From the SEM images and EDS spectra in a and 7b, it can be clearly seen that the surface of the steel sheet without ultrasonic treatment is densely covered with corrosion pits and cracks, the surface is extremely rough, and there are many corrosion products. Figure 7 aSurface roughness (Sa) is 7.846 μm, Figure 7 b The surface roughness (Sa) is 10.253 μm, which once again verifies that the cleaning degree after ultrasound is better.

[0093] After evaluation, it was concluded that the degree of cleaning of organic pollutants on the surface of galvanized steel using ultrasound is effectively enhanced, the cleaning effect is improved, and various cleaning agents can play a maximum cleaning role, which is suitable for improving the cleanliness of organic pollutants on corrosive surfaces.

[0094] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for cleaning galvanized steel surface corrosion, characterized in that: include, The galvanized steel surface after the corrosion test was cleaned by different cleaning medium solutions; X-ray diffraction, scanning electron microscopy and three-dimensional topography analysis are performed on the cleaned galvanized steel after the corrosion test to obtain the surface morphology and three-dimensional surface profile analysis results of the galvanized steel after the corrosion test; and, The surfaces after cleaning with different cleaning media are combined with the surface analysis results to analyze the degree of influence on the galvanized steel surface under cleaning with different media, and to detect and judge the surface cleaning degree of the galvanized steel.

2. The method for cleaning galvanized steel surface corrosion according to claim 1, characterized in that: Different cleaning medium solutions were configured to simulate the process. The galvanized steel was placed in the cleaning solution after the experiment in the corrosion solution and ultrasonically cleaned to obtain a clean surface.

3. The method for cleaning galvanized steel surface corrosion according to claim 2, characterized in that: A surfactant is added to the cleaning solution, and the cleaning temperature is 298-308K.

4. The method for cleaning galvanized steel surface corrosion according to claim 2, characterized in that: The surfactant is specifically ethylene glycol.

5. The method for cleaning galvanized steel surface corrosion according to claim 2, characterized in that: The cleaning medium is specifically an organic solvent, and a pure organic solvent is used.

6. The method for cleaning galvanized steel surface corrosion according to claim 5, characterized in that: Weigh 100 ml of organic solvent into a 250 ml beaker, add 30-50 ml of ethylene glycol solution, and stir at room temperature for 0.5 h to obtain a cleaning solution; The galvanized steel after the salt spray test was placed in the cleaning solution and subjected to ultrasonic treatment for 15 minutes. The steel was then taken out and cleaned twice with deionized water and placed in a drying dish for observation.

7. The method for cleaning galvanized steel surface corrosion according to any one of claims 1 to 6, characterized in that: X-ray diffraction was performed on the galvanized steel after the corrosion experiment after cleaning to obtain the crystal structure and phase of the galvanized steel. The spatial lattice structure of the crystal was determined by analyzing the characteristic peaks in the diffraction spectrum, and the lattice parameters were measured to obtain the product characteristics of the galvanized steel surface after corrosion.

8. The method for cleaning galvanized steel surface corrosion according to claim 7, characterized in that: Through scanning electron microscopy and three-dimensional topography analysis, high-resolution surface morphology images and three-dimensional surface morphology images of the galvanized steel surface after the corrosion experiment were obtained, and the surface roughness of the galvanized steel was calculated. The greater the surface roughness, the more severe the corrosion degree of the galvanized steel.

9. The method for cleaning galvanized steel surface corrosion according to any one of claims 1 to 6, characterized in that: The corrosion resistance of galvanized steel was evaluated by comparing the test results of surface cleanliness using different cleaning media, different corrosion levels, surfactants, and ultrasound.

10. The method for cleaning galvanized steel surface corrosion according to claim 1, characterized in that: Ultrasound is performed simultaneously with the cleaning.

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