Preparation method of water-based anticorrosive paint

Abstract

The invention relates to the technical field of water-based anti-corrosion paint preparation, and discloses a water-based anti-corrosion paint preparation method which comprises the following steps: accurately weighing required water-based resin, pigments and fillers, auxiliaries and solvents according to formula requirements, adding a proper amount of water into a stirring container, then adding a dispersing agent and other necessary auxiliaries, slowly adding the pigments and fillers, and uniformly stirring to obtain the water-based anti-corrosion paint. The preparation method comprises the following steps: uniformly mixing water-based resin and a part of auxiliaries in a container, adding a proper amount of solvent to adjust the viscosity of the resin according to needs, slowly adding the dispersed pigment and filler slurry into the resin mixture while stirring, and uniformly stirring to obtain the water-based paint. And uniform mixing is ensured. According to the present invention, through the scientific formula design and the selection of the high-performance resin, the pigment and the filler, the corrosion resistance of the modern water-based metal anti-corrosion paint is significantly improved, the external moisture, the external oxygen and the external corrosion medium can be effectively isolated, and the metal surface can be protected from corrosion.

Description

Technical Field

[0001] The invention relates to the technical field of water-based anti-corrosion paint preparation, in particular to a method for preparing water-based anti-corrosion paint. Background Art

[0002] Water-based metal anti-corrosion paint is a kind of paint specially used for metal surface anti-corrosion. It adopts a new generation of ion-stabilized self-emulsifying core-shell structure water-based resin, related fillers and additives, and is made through a unique formula and process that combines cross-linking, reaction and emulsification. Water-based metal anti-corrosion paint is widely used on various metal materials, such as steel, aluminum alloy, magnesium alloy, and tinplate. It can not only provide anti-corrosion protection for metals and extend their service life, but also enhance the appearance and texture of metal products. It has a wide range of applications in home decoration, construction, industry and other fields, such as renovation and color change of rusted metals such as doors, windows and guardrails, and surface decoration and protection of metal products such as stainless steel and aluminum alloys.

[0003] As people's lives continue to change, the use of water-based metal anti-corrosion paints has become more and more common, which has made the method of preparing water-based metal anti-corrosion paints more and more common. However, the traditional method of preparing water-based anti-corrosion paints cannot improve the anti-corrosion performance when used, which makes its use very limited. Therefore, a new structure is now proposed to solve this technical problem. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a method for preparing a water-based anti-corrosion paint, which has the advantages of improving the anti-corrosion performance, etc., and solves the problem of low anti-corrosion performance of the traditional preparation method mentioned in the above background technology.

[0006] (II) Technical solution

[0007] In order to achieve the purpose of improving the anti-corrosion performance mentioned in the above background technology, the present invention provides the following technical solution: a method for preparing a water-based anti-corrosion paint, comprising the following steps:

[0008] Step 1: Accurately weigh the required water-based resin, pigments, fillers, additives and solvents according to the formula requirements;

[0009] Step 2: Add an appropriate amount of water into the mixing container, and then add dispersant and other necessary additives;

[0010] Step 3: Slowly add pigments and fillers, and use a high-speed disperser or sand mill to disperse until a uniform and fine pigment and filler slurry is formed;

[0011] Step 4: In another container, mix the water-based resin and some additives evenly. If necessary, add an appropriate amount of solvent to adjust the viscosity of the resin;

[0012] Step 5: Slowly add the dispersed pigment and filler slurry into the resin mixture, stirring while adding to ensure uniform mixing;

[0013] Step 6: According to the performance requirements of the coating, add an appropriate amount of additives to adjust the viscosity, drying time and gloss of the coating, and use a pH adjuster to adjust the pH value of the coating;

[0014] Step 7: Conduct quality inspection on the prepared water-based metal anti-corrosion paint, including testing of appearance, viscosity, drying time, and anti-corrosion performance indicators.

[0015] Preferably, the process of accurately weighing the required water-based resin, pigments, fillers, additives and solvents according to the formula requirements includes: formula review and confirmation, preparation of weighing tools, preparation of raw materials, accurate weighing, recording and checking.

[0016] Formula review and confirmation: Carefully review the formula to ensure that the types, specifications and amounts of all raw materials are clear and specific, and confirm that the water-based resins, pigments, fillers, additives and solvents in the formula are all usable and meet production requirements and quality standards;

[0017] Prepare weighing tools: Select appropriate weighing tools, such as electronic balances or bench scales, ensure that their precision and accuracy meet the formulation requirements, and calibrate the weighing tools to ensure the accuracy of the weighing results.

[0018] Raw material preparation: All raw materials should be placed according to the recipe requirements to ensure easy access and identification. Check whether the packaging of the raw materials is intact and not damaged or contaminated;

[0019] Accurate weighing includes: Water-based resin: according to the amount in the formula, use a weighing tool to accurately weigh the required water-based resin, and pay attention to the viscosity and fluidity of the resin to avoid errors in the weighing process;

[0020] Pigments and fillers: Weigh various pigments and fillers one by one according to the formula requirements. For pigments and fillers that need to be pretreated, ensure accurate weighing after treatment;

[0021] Additives: According to the proportion in the formula, accurately weigh various additives, including dispersants, defoamers, leveling agents, and thickeners. Pay attention to the dosage and order of addition of the additives to ensure that they can fully play their role;

[0022] Solvent: Water is usually used as the solvent. Use a suitable measuring tool to accurately measure the required amount of water according to the amount in the formula;

[0023] Record and check: During the weighing process, record the weighing results of each raw material in time to ensure that they are consistent with the formula requirements. Check the weighing results of all raw materials to ensure that they are correct before proceeding to the next step.

[0024] Preferably, a proper amount of water is added to the stirring container, and then a dispersant and other necessary additives are added. The dispersant is a chemical substance that can reduce the aggregation force between solid particles, which helps to better disperse and suspend the solid particles in water. After all the ingredients are added, sufficient stirring is performed.

[0025] Add an appropriate amount of water: The amount of water is determined based on the concentration and total amount of the solution or suspension to be prepared. Too much water may result in a too low concentration, while too little water may not be able to completely dissolve or disperse all solid substances. Purified water or deionized water is usually required to avoid the influence of impurities on the experimental results.

[0026] Adding dispersants: Dispersants are chemicals that can reduce the aggregation forces between solid particles, helping to better disperse and suspend solid particles in water. The choice of dispersants depends on the properties of the substance to be dispersed, as well as the required dispersion effect and stability. The amount of dispersant added also needs to be carefully controlled. Too much dispersant may cause the solution to be too thin or produce other undesirable side effects.

[0027] Add other necessary additives: In addition to dispersants, other additives such as stabilizers, thickeners, and pH adjusters are also needed to achieve specific performance or meet specific application requirements. The selection and amount of additives also need to be determined according to the purpose of the experiment and the properties of the material;

[0028] Stirring: After adding all ingredients, stir thoroughly to ensure that all substances are evenly mixed and reach the desired dispersion state. The stirring speed and time also need to be adjusted according to the specific situation to achieve the best mixing effect;

[0029] Subsequent treatment: After stirring, further filtration, centrifugation, precipitation or pH adjustment steps may be required to obtain the final solution or suspension.

[0030] Preferably, the pigments and fillers are slowly added and dispersed using a high-speed disperser or a sand mill until a uniform and fine pigment and filler slurry is formed. While the solution in the stirring container is under continuous stirring, the pigments and fillers are slowly and evenly added and then dispersed using a high-speed disperser or a sand mill.

[0031] While the solution in the stirring container is being stirred continuously, slowly and evenly add the pigments and fillers. Slow addition can be achieved by controlling the feeding speed or using a feeding device. Slow addition helps the pigment and filler particles to be more evenly dispersed in the solution, thus improving the dispersion effect.

[0032] High-speed disperser: It generates strong shearing and centrifugal forces through high-speed rotating dispersion discs or dispersion blades to break up the pigment and filler particles and evenly disperse them in the solution. It has simple structure, low cost, easy operation, easy maintenance and high efficiency. It is suitable for easily dispersible pigments and coatings with low fineness requirements.

[0033] Sand mill: It relies on the impact and shear force generated by the impact of the grinding media and the rolling of the grinding media to grind and disperse. It has high production efficiency, good dispersion fineness, easy operation, simple structure and easy maintenance. It is suitable for the preparation of coatings that require higher dispersion fineness and stability, such as fine and easy-to-disperse synthetic pigments, coarse particles or micronized natural pigments and fillers, etc., which are easy to flow.

[0034] After adding pigments and fillers, start the high-speed disperser or sand mill for dispersion. Adjust the working parameters of the disperser or sand mill according to the type of pigments and fillers and the required dispersion effect. During the dispersion process, the dispersion of the pigments and fillers needs to be continuously observed to ensure the formation of a uniform and fine pigment and filler slurry.

[0035] Preferably, the aqueous resin and part of the additives are mixed evenly in another container, and a proper amount of solvent can be added to adjust the viscosity of the resin as needed, which also includes preparing a container and raw materials, mixing the aqueous resin and the additives, and adjusting the viscosity of the resin.

[0036] Prepare containers and raw materials: Choose a clean, pollution-free container, and make sure that the container is large enough to hold the required water-based resin, additives, and solvents. Accurately weigh the required water-based resin and additives according to the formula requirements. Additives may include thickeners, leveling agents, and defoamers. The specific type and amount should be determined according to the formula and actual application requirements.

[0037] Mix water-based resin and additives: Pour the weighed water-based resin into the prepared container, add additives one by one according to the formula requirements, and stir while adding to ensure that the additives can be evenly dispersed in the resin. Use a stirrer or a manual stirring rod to fully stir the resin and additives until a uniform mixture is formed. The stirring time should be determined according to the specific situation to ensure that all ingredients are fully mixed;

[0038] Adjust the viscosity of the resin: After mixing evenly, use a viscometer to measure the viscosity of the resin to understand whether the current viscosity meets the formula requirements or construction requirements. If the viscosity of the resin is too high, you can add an appropriate amount of solvent as needed to adjust the viscosity. Add the solvent slowly and stir while adding to avoid local concentrations that are too high or too low. After adding the solvent, stir the resin again to ensure that the solvent is evenly distributed in the resin and form a stable mixture.

[0039] Preferably, the dispersed pigment and filler slurry is slowly added to the resin mixture while stirring to ensure uniform mixing, comprising the following steps:

[0040] Step 1: Ensure that the dispersed pigment, filler and resin mixture are ready, and select the appropriate mixing equipment according to the production scale and requirements;

[0041] Step 2: slowly add the dispersed pigment and filler slurry into the resin mixture;

[0042] Step 3: While adding the pigment and filler slurry, start the stirring equipment and continue stirring the mixture.

[0043] By adjusting the feeding device or manually controlling the adding speed, ensure that the pigment and filler slurry can be added to the resin mixture evenly and stably. During the stirring process, closely observe the color and uniformity of the mixture. If local color unevenness or insufficient stirring is found, the stirring speed and adding speed should be adjusted in time. According to the properties of the mixture and the stirring effect, the speed and stirring time parameters of the stirring equipment should be adjusted in time to ensure uniform mixing. During the stirring process, pay attention to avoid generating too many bubbles. After mixing, sample the mixture for inspection to ensure that it has uniform color, is free of impurities, and meets the formula requirements. Record the process of adding pigment and filler slurry and the stirring parameters in detail for reference and reproduction in subsequent production.

[0044] Preferably, according to the performance requirements of the coating, an appropriate amount of additives is added to adjust the viscosity, drying time and gloss of the coating, and the pH value of the coating is adjusted by using a pH adjuster to adjust the viscosity of the coating, adjust the drying time of the coating, adjust the gloss of the coating, and adjust the pH value of the coating.

[0045] Adjust the viscosity of the paint: The viscosity of the paint directly affects its construction performance and coating quality. Too high viscosity may lead to uneven coating, while too low viscosity may cause sagging. According to the formula and performance requirements of the paint, choose a suitable thickener or diluent to adjust the viscosity. Add the thickener or diluent gradually while stirring. Stir thoroughly after each addition and test the viscosity until it reaches the required range;

[0046] Adjust the drying time of the paint: The length of the drying time will affect the speed of film formation, hardness and construction efficiency. According to the type of paint and the required drying time, select the appropriate drying regulator, accurately weigh the drying regulator according to the formula requirements, and add it to the paint and stir it thoroughly to ensure that it is evenly dispersed;

[0047] Adjust the glossiness of the paint: The glossiness of the paint can be adjusted according to actual needs, such as high gloss, semi-gloss, and matte. Select a suitable gloss regulator and add it to the paint according to the formula requirements. After adding the gloss regulator, stir it thoroughly and test the glossiness of the paint, and make appropriate adjustments based on the test results;

[0048] Adjust the pH value of the paint: The pH value of the paint has an important influence on its stability, construction performance and film quality. According to the paint formula and the required pH range, select a suitable pH adjuster, gradually add the pH adjuster while stirring, and use a pH meter for real-time monitoring until the required pH range is reached.

[0049] Preferably, the quality inspection of the prepared water-based metal anti-corrosion paint includes testing of indicators such as appearance, viscosity, drying time, and anti-corrosion performance, wherein:

[0050] Appearance inspection: mainly observe the color, transparency, uniformity of the coating and whether there are impurities and crusting;

[0051] Viscosity test: Viscosity is an important indicator to measure the fluidity of water-based paint, which directly affects the difficulty of construction and the quality of coating film;

[0052] Drying time test: including surface drying and actual drying time, which is the key parameter for evaluating the curing speed of coatings;

[0053] Anti-corrosion performance test: mainly evaluates the anti-corrosion performance of coatings in specific environments, such as water resistance, salt water resistance, acid and alkali resistance.

[0054] Appearance inspection: The coating should be uniform in color, without defects such as floating color, blooming, precipitation, and agglomeration. Ensure that the surface is flat and smooth after coating and meets the design requirements. The appearance of the coating can be visually inspected, and a magnifying glass or microscope can be used for auxiliary observation when necessary;

[0055] Viscosity testing: Set the appropriate viscosity range according to the product characteristics and application, use a rotational viscometer to measure the viscosity of the coating, and judge whether the viscosity meets the requirements based on the instrument readings. The viscosity can also be estimated by measuring the time it takes for the coating to flow out of a specific container;

[0056] Drying time test: Set a reasonable drying time range according to different use environments, and the test method is divided into two types: surface drying time test and actual drying time test, among which:

[0057] Surface drying time test: The surface drying time of the coating can be measured by the cotton ball method, finger touch method or small glass ball method;

[0058] Drying time test: filter paper pressing method, cotton ball pressing method, blade method and thick layer drying method are commonly used to test the drying time of coatings;

[0059] Anti-corrosion performance test: Set corresponding test standards and indicators according to the use environment and anti-corrosion requirements of the coating, including:

[0060] Water resistance test: Soak the coating sample in water for a certain period of time and observe its changes to evaluate water resistance;

[0061] Salt water resistance test: Soak the coating sample in salt water for a certain period of time and observe its changes to evaluate the salt water resistance;

[0062] Acid and alkali resistance test: Soak the coating sample in acid or alkali solution for a certain period of time and observe its changes to evaluate the acid and alkali resistance.

[0063] Compared with the prior art, the present invention provides a method for preparing a water-based anticorrosive paint, which has the following beneficial effects:

[0064] 1. The present invention, the current water-based anti-corrosion paint preparation method shows significant advantages and benefits compared with the traditional method. Through scientific formula design and the selection of high-performance resins and pigments and fillers, the anti-corrosion performance of modern water-based metal anti-corrosion paint is significantly improved, which can effectively isolate external moisture, oxygen and corrosive media, and protect the metal surface from corrosion.

[0065] 2. The present invention provides a water-based anti-corrosion paint preparation method compared with the traditional method. The use of water-based metal anti-corrosion paint helps promote the sustainable development of the coatings industry and the construction of ecological civilization, which is in line with the green and low-carbon development trend advocated globally.

[0066] 3. In the present invention, some special additives and functional additives with anti-acid and alkali corrosion effects are added to the water-based anti-corrosion paint. The additives can react with acid and alkali substances to neutralize their corrosiveness. The functional additives can ensure that the paint forms a uniform and dense coating during the construction process, thereby effectively isolating corrosive substances or forming a protective film to isolate corrosive substances, so that the product has a certain acid and alkali resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] See also Figure 1 , a method for preparing a water-based anticorrosive paint, comprising the following steps:

[0070] Step 1: Accurately weigh the required water-based resin, pigments, fillers, additives and solvents according to the formula requirements;

[0071] Step 2: Add an appropriate amount of water into the mixing container, and then add dispersant and other necessary additives;

[0072] Step 3: Slowly add pigments and fillers, and use a high-speed disperser or sand mill to disperse until a uniform and fine pigment and filler slurry is formed;

[0073] Step 4: In another container, mix the water-based resin and some additives evenly. If necessary, add an appropriate amount of solvent to adjust the viscosity of the resin;

[0074] Step 5: Slowly add the dispersed pigment and filler slurry into the resin mixture, stirring while adding to ensure uniform mixing;

[0075] Step 6: According to the performance requirements of the coating, add an appropriate amount of additives to adjust the viscosity, drying time and gloss of the coating, and use a pH adjuster to adjust the pH value of the coating;

[0076] Step 7: Conduct quality inspection on the prepared water-based metal anti-corrosion paint, including testing of appearance, viscosity, drying time, and anti-corrosion performance indicators.

[0077] Preferably, the process of accurately weighing the required water-based resin, pigments, fillers, additives and solvents according to the formula requirements includes: formula review and confirmation, preparation of weighing tools, preparation of raw materials, accurate weighing, recording and checking.

[0078] Through the above technical solutions, formula review and confirmation: Carefully review the formula to ensure that the types, specifications and amounts of all raw materials are clear and specific, and confirm that the water-based resins, pigments, fillers, additives and solvents in the formula are all available and meet production requirements and quality standards;

[0079] Prepare weighing tools: Select appropriate weighing tools, such as electronic balances or bench scales, ensure that their precision and accuracy meet the formulation requirements, and calibrate the weighing tools to ensure the accuracy of the weighing results.

[0080] Raw material preparation: All raw materials should be placed according to the recipe requirements to ensure easy access and identification. Check whether the packaging of the raw materials is intact and not damaged or contaminated;

[0081] Accurate weighing includes: Water-based resin: according to the amount in the formula, use a weighing tool to accurately weigh the required water-based resin, and pay attention to the viscosity and fluidity of the resin to avoid errors in the weighing process;

[0082] Pigments and fillers: Weigh various pigments and fillers one by one according to the formula requirements. For pigments and fillers that need to be pretreated, ensure accurate weighing after treatment;

[0083] Additives: According to the proportion in the formula, accurately weigh various additives, including dispersants, defoamers, leveling agents, and thickeners. Pay attention to the dosage and order of addition of the additives to ensure that they can fully play their role;

[0084] Solvent: Water is usually used as the solvent. Use a suitable measuring tool to accurately measure the required amount of water according to the amount in the formula;

[0085] Record and check: During the weighing process, record the weighing results of each raw material in time to ensure that they are consistent with the formula requirements. Check the weighing results of all raw materials to ensure that they are correct before proceeding to the next step.

[0086] Preferably, a proper amount of water is added to the stirring container, and then a dispersant and other necessary additives are added. The dispersant is a chemical substance that can reduce the aggregation force between solid particles, which helps to better disperse and suspend the solid particles in water. After all the ingredients are added, sufficient stirring is performed.

[0087] Through the above technical solution, add an appropriate amount of water: the amount of water is determined according to the concentration and total amount of the solution or suspension to be prepared. Too much water may result in too low a concentration, while too little water may not be able to completely dissolve or disperse all solid substances. Usually, pure water or deionized water is required to avoid the influence of impurities on the experimental results.

[0088] Adding dispersants: Dispersants are chemicals that can reduce the aggregation forces between solid particles, helping to better disperse and suspend solid particles in water. The choice of dispersants depends on the properties of the substance to be dispersed, as well as the required dispersion effect and stability. The amount of dispersant added also needs to be carefully controlled. Too much dispersant may cause the solution to be too thin or produce other undesirable side effects.

[0089] Add other necessary additives: In addition to dispersants, other additives such as stabilizers, thickeners, and pH adjusters are also needed to achieve specific performance or meet specific application requirements. The selection and amount of additives also need to be determined according to the purpose of the experiment and the properties of the material;

[0090] Stirring: After adding all ingredients, stir thoroughly to ensure that all substances are evenly mixed and reach the desired dispersion state. The stirring speed and time also need to be adjusted according to the specific situation to achieve the best mixing effect;

[0091] Subsequent treatment: After stirring, further filtration, centrifugation, precipitation or pH adjustment steps may be required to obtain the final solution or suspension.

[0092] Preferably, the pigments and fillers are slowly added and dispersed using a high-speed disperser or a sand mill until a uniform and fine pigment and filler slurry is formed. While the solution in the stirring container is under continuous stirring, the pigments and fillers are slowly and evenly added and then dispersed using a high-speed disperser or a sand mill.

[0093] According to the above technical solution, the pigment and filler are slowly and evenly added while the solution in the stirring container is in a state of continuous stirring. The slow addition is achieved by controlling the feeding speed or using a feeding device. The slow addition helps the pigment and filler particles to be more evenly dispersed in the solution, thereby improving the dispersion effect.

[0094] High-speed disperser: It generates strong shearing and centrifugal forces through high-speed rotating dispersion discs or dispersion blades to break up the pigment and filler particles and evenly disperse them in the solution. It has simple structure, low cost, easy operation, easy maintenance and high efficiency. It is suitable for easily dispersible pigments and coatings with low fineness requirements.

[0095] Sand mill: It relies on the impact and shear force generated by the impact of the grinding media and the rolling of the grinding media to grind and disperse. It has high production efficiency, good dispersion fineness, easy operation, simple structure and easy maintenance. It is suitable for the preparation of coatings that require higher dispersion fineness and stability, such as fine and easy-to-disperse synthetic pigments, coarse particles or micronized natural pigments and fillers, etc., which are easy to flow.

[0096] After adding pigments and fillers, start the high-speed disperser or sand mill for dispersion. Adjust the working parameters of the disperser or sand mill according to the type of pigments and fillers and the required dispersion effect. During the dispersion process, the dispersion of the pigments and fillers needs to be continuously observed to ensure the formation of a uniform and fine pigment and filler slurry.

[0097] Preferably, the aqueous resin and part of the additives are mixed evenly in another container, and a proper amount of solvent can be added to adjust the viscosity of the resin as needed, which also includes preparing a container and raw materials, mixing the aqueous resin and the additives, and adjusting the viscosity of the resin.

[0098] Prepare containers and raw materials through the above technical solution: select a clean, pollution-free container, ensure that the container is large enough to accommodate the required water-based resin, additives and solvents, and accurately weigh the required water-based resin and additives according to the formula requirements. Additives may include thickeners, leveling agents, and defoamers. The specific type and amount should be determined according to the formula and actual application requirements;

[0099] Mix water-based resin and additives: Pour the weighed water-based resin into the prepared container, add additives one by one according to the formula requirements, and stir while adding to ensure that the additives can be evenly dispersed in the resin. Use a stirrer or a manual stirring rod to fully stir the resin and additives until a uniform mixture is formed. The stirring time should be determined according to the specific situation to ensure that all ingredients are fully mixed;

[0100] Adjust the viscosity of the resin: After mixing evenly, use a viscometer to measure the viscosity of the resin to understand whether the current viscosity meets the formula requirements or construction requirements. If the viscosity of the resin is too high, you can add an appropriate amount of solvent as needed to adjust the viscosity. Add the solvent slowly and stir while adding to avoid local concentrations that are too high or too low. After adding the solvent, stir the resin again to ensure that the solvent is evenly distributed in the resin and form a stable mixture.

[0101] Preferably, the dispersed pigment and filler slurry is slowly added to the resin mixture while stirring to ensure uniform mixing, comprising the following steps:

[0102] Step 1: Ensure that the dispersed pigment, filler and resin mixture are ready, and select the appropriate mixing equipment according to the production scale and requirements;

[0103] Step 2: slowly add the dispersed pigment and filler slurry into the resin mixture;

[0104] Step 3: While adding the pigment and filler slurry, start the stirring equipment and continue stirring the mixture.

[0105] Through the above technical scheme, by adjusting the feeding device or manually controlling the adding speed, it is ensured that the pigment and filler slurry can be added to the resin mixture evenly and stably. During the stirring process, the color and uniformity of the mixture are closely observed. If local color unevenness or insufficient stirring is found, the stirring speed and adding speed should be adjusted in time. According to the properties of the mixture and the stirring effect, the speed and stirring time parameters of the stirring equipment are adjusted in time to ensure uniform mixing. During the stirring process, care is taken to avoid generating too many bubbles. After the mixing is completed, the mixture is sampled and tested to ensure that its color is uniform, free of impurities, and meets the formula requirements. The process of adding the pigment and filler slurry and the stirring parameters are recorded in detail for reference and reproduction in subsequent production.

[0106] Preferably, according to the performance requirements of the coating, an appropriate amount of additives is added to adjust the viscosity, drying time and gloss of the coating, and the pH value of the coating is adjusted by using a pH adjuster to adjust the viscosity of the coating, adjust the drying time of the coating, adjust the gloss of the coating, and adjust the pH value of the coating.

[0107] Through the above technical solution, the viscosity of the coating is adjusted: the viscosity of the coating directly affects its construction performance and coating quality. Too high viscosity may lead to uneven coating, and too low viscosity may cause sagging. According to the formula and performance requirements of the coating, a suitable thickener or diluent is selected to adjust the viscosity. The thickener or diluent is gradually added under stirring. After each addition, it is fully stirred and the viscosity is tested until the desired range is reached;

[0108] Adjust the drying time of the paint: The length of the drying time will affect the speed of film formation, hardness and construction efficiency. According to the type of paint and the required drying time, select the appropriate drying regulator, accurately weigh the drying regulator according to the formula requirements, and add it to the paint and stir it thoroughly to ensure that it is evenly dispersed;

[0109] Adjust the glossiness of the paint: The glossiness of the paint can be adjusted according to actual needs, such as high gloss, semi-gloss, and matte. Select a suitable gloss regulator and add it to the paint according to the formula requirements. After adding the gloss regulator, stir it thoroughly and test the glossiness of the paint, and make appropriate adjustments based on the test results;

[0110] Adjust the pH value of the paint: The pH value of the paint has an important influence on its stability, construction performance and film quality. According to the paint formula and the required pH range, select a suitable pH adjuster, gradually add the pH adjuster while stirring, and use a pH meter for real-time monitoring until the required pH range is reached.

[0111] Preferably, the quality inspection of the prepared water-based metal anti-corrosion paint includes testing of indicators such as appearance, viscosity, drying time, and anti-corrosion performance, wherein:

[0112] Appearance inspection: mainly observe the color, transparency, uniformity of the coating and whether there are impurities and crusting;

[0113] Viscosity test: Viscosity is an important indicator to measure the fluidity of water-based paint, which directly affects the difficulty of construction and the quality of coating film;

[0114] Drying time test: including surface drying and actual drying time, which is the key parameter for evaluating the curing speed of coatings;

[0115] Anti-corrosion performance test: mainly evaluates the anti-corrosion performance of coatings in specific environments, such as water resistance, salt water resistance, acid and alkali resistance.

[0116] Through the above technical solution, appearance inspection: the coating should be uniform in color, without defects such as floating color, blooming, precipitation, agglomeration, etc., to ensure that the surface is flat and smooth after coating and meets the design requirements. The appearance of the coating can be visually inspected, and a magnifying glass or microscope can be used for auxiliary observation when necessary;

[0117] Viscosity testing: Set the appropriate viscosity range according to the product characteristics and application, use a rotational viscometer to measure the viscosity of the coating, and judge whether the viscosity meets the requirements based on the instrument readings. The viscosity can also be estimated by measuring the time it takes for the coating to flow out of a specific container;

[0118] Drying time test: Set a reasonable drying time range according to different use environments, and the test method is divided into two types: surface drying time test and actual drying time test, among which:

[0119] Surface drying time test: The surface drying time of the coating can be measured by the cotton ball method, finger touch method or small glass ball method;

[0120] Drying time test: filter paper pressing method, cotton ball pressing method, blade method and thick layer drying method are commonly used to test the drying time of coatings;

[0121] Anti-corrosion performance test: Set corresponding test standards and indicators according to the use environment and anti-corrosion requirements of the coating, including:

[0122] Water resistance test: Soak the coating sample in water for a certain period of time and observe its changes to evaluate water resistance;

[0123] Salt water resistance test: Soak the coating sample in salt water for a certain period of time and observe its changes to evaluate the salt water resistance;

[0124] Acid and alkali resistance test: Soak the coating sample in acid or alkali solution for a certain period of time and observe its changes to evaluate the acid and alkali resistance.

[0125] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a water-based anticorrosive paint, characterized in that: The following steps are involved: Step 1: Accurately weigh the required water-based resin, pigments, fillers, additives and solvents according to the formula requirements; Step 2: Add an appropriate amount of water into the mixing container, and then add dispersant and other necessary additives; Step 3: Slowly add pigments and fillers, and use a high-speed disperser or sand mill to disperse until a uniform and fine pigment and filler slurry is formed; Step 4: In another container, mix the water-based resin and some additives evenly. If necessary, add an appropriate amount of solvent to adjust the viscosity of the resin; Step 5: Slowly add the dispersed pigment and filler slurry into the resin mixture, stirring while adding to ensure uniform mixing; Step 6: According to the performance requirements of the coating, add an appropriate amount of additives to adjust the viscosity, drying time and gloss of the coating, and use a pH adjuster to adjust the pH value of the coating; Step 7: Conduct quality inspection on the prepared water-based metal anti-corrosion paint, including testing of appearance, viscosity, drying time, and anti-corrosion performance indicators.

2. The method for preparing a water-based anticorrosive paint according to claim 1, characterized in that: The process of accurately weighing the required water-based resin, pigments, fillers, additives and solvents according to the formula requirements includes: formula review and confirmation, preparation of weighing tools, preparation of raw materials, accurate weighing, recording and verification.

3. The method for preparing a water-based anticorrosive paint according to claim 1, characterized in that: The method comprises adding an appropriate amount of water into the stirring container, and then adding a dispersant and other necessary additives. The dispersant is a chemical substance that can reduce the aggregation force between solid particles, and helps the solid particles to be better dispersed and suspended in water. After adding all the ingredients, sufficient stirring is performed.

4. The method for preparing a water-based anticorrosive paint according to claim 1, characterized in that: The pigments and fillers are slowly added and dispersed using a high-speed disperser or a sand mill until a uniform and fine pigment and filler slurry is formed. While the solution in the stirring container is under continuous stirring, the pigments and fillers are slowly and evenly added and dispersed using a high-speed disperser or a sand mill.

5. The method for preparing a water-based anticorrosive paint according to claim 1, characterized in that: In another container, the water-based resin and part of the additives are mixed uniformly, and a proper amount of solvent can be added to adjust the viscosity of the resin as needed, which also includes preparing containers and raw materials, mixing the water-based resin and the additives, and adjusting the viscosity of the resin.

6. The method for preparing a water-based anticorrosive paint according to claim 1, characterized in that: The dispersed pigment and filler slurry is slowly added to the resin mixture, and stirred while adding to ensure uniform mixing, comprising the following steps: Step 1: Ensure that the dispersed pigment, filler and resin mixture are ready, and select the appropriate mixing equipment according to the production scale and requirements; Step 2: slowly add the dispersed pigment and filler slurry into the resin mixture; Step 3: While adding the pigment and filler slurry, start the stirring equipment and continue stirring the mixture.

7. The method for preparing a water-based anticorrosive paint according to claim 1, characterized in that: According to the performance requirements of the coating, an appropriate amount of additives is added to adjust the viscosity, drying time and gloss of the coating, and the pH adjuster is used to adjust the pH value of the coating, which includes adjusting the viscosity of the coating, adjusting the drying time of the coating, adjusting the gloss of the coating, and adjusting the pH value of the coating.

8. The method for preparing a water-based anticorrosive paint according to claim 1, characterized in that: The quality inspection of the prepared water-based metal anti-corrosion paint includes the testing of appearance, viscosity, drying time, anti-corrosion performance and other indicators, wherein: Appearance inspection: mainly observe the color, transparency, uniformity of the coating and whether there are impurities and crusting; Viscosity test: Viscosity is an important indicator to measure the fluidity of water-based paint, which directly affects the difficulty of construction and the quality of coating film; Drying time test: including surface drying and actual drying time, which is the key parameter for evaluating the curing speed of coatings; Anti-corrosion performance test: mainly evaluates the anti-corrosion performance of coatings in specific environments, such as water resistance, salt water resistance, acid and alkali resistance.

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