Aqueous rust conversion agent and method for its preparation
By combining water-based styrene-acrylic emulsion and nano-attapulgite synergistic compound modifier, the problem of insufficient bonding strength and stability in water-based rust inhibitors is solved, achieving excellent bonding strength and acid corrosion resistance, making it suitable for various rust prevention fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGZHOU BIJIASUO BUILDING MATERIALS CO LTD
- Filing Date
- 2023-05-09
- Publication Date
- 2026-06-23
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] This invention relates to the field of water-based rust technology, specifically to a water-based rust converter and its preparation method. Background Technology
[0002] Rust converter is a new type of water-based rust remover based on metal chelation passivation technology. It can achieve four functions in one step: rust removal, passivation, rust prevention, and primer. It is a revolution in metal surface treatment technology. The rust converter transforms the rust layer into a continuous and sealed coating layer, which completely seals the steel surface and the rust layer. The harmful active iron compounds in the rust layer can be transformed or passivated through chemical reaction, becoming stable inert chelates that will no longer rust.
[0003] Water-based primers are a function of water-based rust conversion coatings, serving as a protective layer for metal substrates. They often use a mixture of tannic acid, phosphoric acid, etc., which can easily result in high levels of active groups, thus affecting the product's performance. This leads to poor adhesion between the product and the substrate, as well as poor acid and water resistance, limiting the product's efficiency. Summary of the Invention
[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a water-based rust converter and its preparation method to solve the problems mentioned in the background art.
[0005] The present invention solves the technical problem by adopting the following technical solution:
[0006] This invention provides a water-based rust converter, comprising the following raw materials in parts by weight:
[0007] 45-55 parts of water-based styrene-acrylic emulsion, 15-20 parts of nano-attapulgite coordinating compound modifier, 5-9 parts of nano-barium sulfate coordinator, 3-6 parts of rust converter, 3-5 parts of defoamer, and 1-3 parts of film-forming aid.
[0008] Preferably, the water-based rust converter comprises the following raw materials in parts by weight:
[0009] 50 parts of water-based styrene-acrylic emulsion, 17.5 parts of nano-attapulgite coordinating compound modifier, 7 parts of nano-barium sulfate coordinator, 4.5 parts of rust converter, 4 parts of defoamer, and 2 parts of film-forming aid.
[0010] Preferably, the preparation method of the nano-attapulgite synergistic compound liquid modifier is as follows:
[0011] S01: Add 3-6 parts of a 5% (w / w) chitosan aqueous solution to 5-10 parts of a lanthanum sulfate solution to obtain a chitosan blended solution;
[0012] S02: Add 1-3 parts of silane coupling agent KH560 and 0.25-0.45 parts of triisostearoyl titanate isopropyl ester to the chitosan mixture, stir evenly, and finally add 1-3 parts of diisooctyl phosphate and stir thoroughly to obtain the compound solution.
[0013] S03: Add nano-attapulgite to 2-3 times the mass fraction of 2% hydrochloric acid solution and stir evenly. Then add 1-3% of the total amount of nano-attapulgite and 5-10% of hydrogen peroxide solution, stir thoroughly, and then wash with water and dry.
[0014] S04: Add the SO3 product to the compounding solution at a weight ratio of 1:5, then add 10-20% of the total amount of SO2 product as a modifier, stir thoroughly, then wash with water and dry to obtain the nano-attapulgite synergistic compounding solution modifier.
[0015] Preferably, the lanthanum sulfate solution has a mass fraction of 10-15%.
[0016] Preferably, the method for preparing the modulating agent is as follows:
[0017] Add 5-10% of the total amount of carbon nanotubes to a barium nitrate aqueous solution, then add 1-3% of the total amount of carbon nanotubes to sodium humate and 2-5% to phosphoric acid. Finally, put the mixture into a ball mill for ball milling at a speed of 1000-1500 r / min for 20-30 min. After ball milling, wash with water and dry to obtain the conditioning agent.
[0018] Preferably, the barium nitrate aqueous solution has a mass fraction of 2%.
[0019] Preferably, the preparation method of the nano-barium sulfate coordinator is as follows:
[0020] S11: Add 5-10 parts of tetra-n-propylzirconate to 10-20 parts of ethanol solvent, then add 2-4 parts of sodium dodecyl sulfate and 1-3 parts of hydrochloric acid, stir evenly, and finally add 2-4 parts of triethanolamine borate, stir thoroughly to obtain the modified solution.
[0021] S12: Add nano-barium sulfate to 3-5 times its volume of the modification solution and stir to modify it. After stirring, wash with water and dry to obtain nano-barium sulfate synergist.
[0022] Preferably, the stirring speed for the stirring modification is 500-1000 r / min, the stirring time is 1-2 h, and the stirring temperature is 40-50℃.
[0023] Preferably, the defoamer is BYK065; the film-forming aid is propylene glycol butyl ether; and the rust converter is sodium aluminum phosphate rust converter.
[0024] The present invention also provides a method for preparing a water-based rust converter, comprising the following steps: mixing water-based styrene-acrylic emulsion, nano-attapulgite coordinating compound modifier, nano-barium sulfate coordinating agent, rust converter, defoamer, and film-forming aid raw materials evenly to obtain the water-based rust converter.
[0025] Instructions for use;
[0026] Brushing, spraying, roller coating, and dipping are all acceptable methods, with spraying yielding the best results. Application conditions: Relative humidity less than 65%, and application is prohibited in rainy weather. Drying time: At room temperature of 25℃ and humidity less than 65%, surface drying takes approximately 2 hours, and complete drying takes approximately 12 hours. Actual drying time is affected by temperature, humidity, and film thickness. If the temperature is low, the humidity is high, or the film is thick, the surface drying, complete drying, and recoating times should be extended accordingly.
[0027] Compared with the prior art, the present invention has the following beneficial effects:
[0028] This invention possesses strong wetting and penetrating capabilities, allowing it to penetrate to the bottom of the rust layer, passivating or transforming it. It is applicable to fields involving rust removal and prevention, such as steel reinforcement corrosion protection in construction sites, steel structure factory manufacturing and maintenance, color steel tile manufacturing and anti-corrosion renovation, shipbuilding, large equipment manufacturing and maintenance, and storage tank and oil tank manufacturing. It utilizes a water-based styrene-acrylic emulsion as the matrix, with nano-attapulgite coordinating compound modifier and nano-barium sulfate coordinator working synergistically to optimize the adhesion strength of the product's substrate and its acid and water resistance stability. The nano-attapulgite coordinating compound modifier uses a chitosan aqueous solution mixed with lanthanum sulfate solution as the matrix, which... The activity and permeability of the matrix were improved by adding nano-attapulgite to hydrochloric acid and hydrogen peroxide solutions. The activity was further optimized and improved. A compound solution was prepared by combining chitosan with silane coupling agent KH560, isopropyl triisostearoyl titanate, and diisooctyl phosphate. The compound solution was further optimized by combining SO3 products and modifiers. The synergistic effect of the nano-attapulgite compound solution modifier and nano-barium sulfate was enhanced. After modification by the compound solution, the synergistic effect of the nano-barium sulfate modifier was significant. As a result, the bonding strength of the prepared product was optimized, and the acid corrosion resistance and water resistance stability of the product were significantly improved. Detailed Implementation
[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0030] This embodiment of a water-based rust converter comprises the following raw materials in parts by weight:
[0031] 45-55 parts of water-based styrene-acrylic emulsion, 15-20 parts of nano-attapulgite coordinating compound modifier, 5-9 parts of nano-barium sulfate coordinator, 3-6 parts of rust converter, 3-5 parts of defoamer, and 1-3 parts of film-forming aid.
[0032] The water-based rust converter in this embodiment consists of the following raw materials in parts by weight:
[0033] 50 parts of water-based styrene-acrylic emulsion, 17.5 parts of nano-attapulgite coordinating compound modifier, 7 parts of nano-barium sulfate coordinator, 4.5 parts of rust converter, 4 parts of defoamer, and 2 parts of film-forming aid.
[0034] The preparation method of the nano-attapulgite synergistic compound liquid modifier in this embodiment is as follows:
[0035] S01: Add 3-6 parts of a 5% (w / w) chitosan aqueous solution to 5-10 parts of a lanthanum sulfate solution to obtain a chitosan blended solution;
[0036] S02: Add 1-3 parts of silane coupling agent KH560 and 0.25-0.45 parts of triisostearoyl titanate isopropyl ester to the chitosan mixture, stir evenly, and finally add 1-3 parts of diisooctyl phosphate and stir thoroughly to obtain the compound solution.
[0037] S03: Add nano-attapulgite to 2-3 times the mass fraction of 2% hydrochloric acid solution and stir evenly. Then add 1-3% of the total amount of nano-attapulgite and 5-10% of hydrogen peroxide solution, stir thoroughly, and then wash with water and dry.
[0038] S04: Add the SO3 product to the compounding solution at a weight ratio of 1:5, then add 10-20% of the total amount of SO2 product as a modifier, stir thoroughly, then wash with water and dry to obtain the nano-attapulgite synergistic compounding solution modifier.
[0039] The lanthanum sulfate solution in this embodiment has a mass fraction of 10-15%.
[0040] The preparation method of the modifier in this embodiment is as follows:
[0041] Add 5-10% of the total amount of carbon nanotubes to a barium nitrate aqueous solution, then add 1-3% of the total amount of carbon nanotubes to sodium humate and 2-5% to phosphoric acid. Finally, put the mixture into a ball mill for ball milling at a speed of 1000-1500 r / min for 20-30 min. After ball milling, wash with water and dry to obtain the conditioning agent.
[0042] The mass fraction of the barium nitrate aqueous solution in this embodiment is 2%.
[0043] The preparation method of the nano-barium sulfate coordinator in this embodiment is as follows:
[0044] S11: Add 5-10 parts of tetra-n-propylzirconate to 10-20 parts of ethanol solvent, then add 2-4 parts of sodium dodecyl sulfate and 1-3 parts of hydrochloric acid, stir evenly, and finally add 2-4 parts of triethanolamine borate, stir thoroughly to obtain the modified solution.
[0045] S12: Add nano-barium sulfate to 3-5 times its volume of the modification solution and stir to modify it. After stirring, wash with water and dry to obtain nano-barium sulfate synergist.
[0046] In this embodiment, the stirring speed for the stirring modification is 500-1000 r / min, the stirring time is 1-2 h, and the stirring temperature is 40-50℃.
[0047] In this embodiment, the defoamer is BYK065; the film-forming aid is propylene glycol butyl ether; and the rust converter is sodium aluminum phosphate rust converter.
[0048] The preparation method of a water-based rust converter in this embodiment includes the following steps: mixing water-based styrene-acrylic emulsion, nano-attapulgite coordinating compound modifier, nano-barium sulfate coordinating agent, rust converter, defoamer, and film-forming aid raw materials evenly to obtain the water-based rust converter.
[0049] Example 1.
[0050] This embodiment of a water-based rust converter comprises the following raw materials in parts by weight:
[0051] 45 parts of water-based styrene-acrylic emulsion, 15 parts of nano-attapulgite coordinating compound modifier, 5 parts of nano-barium sulfate coordinator, 3 parts of rust conversion agent, 3 parts of defoamer, and 1 part of film-forming aid.
[0052] The preparation method of the nano-attapulgite synergistic compound liquid modifier in this embodiment is as follows:
[0053] S01: Add 3 parts of 5% (w / w) chitosan aqueous solution to 5 parts of lanthanum sulfate solution to obtain chitosan blended solution;
[0054] S02: Add 1 part of silane coupling agent KH560 and 0.25 parts of triisostearoyl titanate isopropyl ester to the chitosan mixture, stir evenly, and finally add 1 part of diisooctyl phosphate and stir thoroughly to obtain the compound solution.
[0055] S03: Add nano-attapulgite to 2 times the mass fraction of 2% hydrochloric acid solution and stir evenly. Then add 1% of the total amount of nano-attapulgite and 5% of hydrogen peroxide solution, stir thoroughly, and then wash with water and dry.
[0056] S04: Add the SO3 product to the compounding solution at a weight ratio of 1:5, then add 10% of the total amount of SO2 product as a modifier, stir thoroughly, then wash with water and dry to obtain the nano-attapulgite coordinated compounding solution modifier.
[0057] The lanthanum sulfate solution in this embodiment has a mass fraction of 10%.
[0058] The preparation method of the modifier in this embodiment is as follows:
[0059] Add 5% of the total amount of carbon nanotubes to a barium nitrate aqueous solution, then add 1% of the total amount of carbon nanotubes to sodium humate and 2% to phosphoric acid. Finally, put the mixture into a ball mill for ball milling at a speed of 1000 r / min for 20 min. After ball milling, wash with water and dry to obtain the conditioning agent.
[0060] The mass fraction of the barium nitrate aqueous solution in this embodiment is 2%.
[0061] The preparation method of the nano-barium sulfate coordinator in this embodiment is as follows:
[0062] S11: Add 5 parts of tetra-n-propylzirconate to 10 parts of ethanol solvent, then add 2 parts of sodium dodecyl sulfate and 1 part of hydrochloric acid, stir evenly, and finally add 2 parts of triethanolamine borate, stir thoroughly to obtain the modified solution.
[0063] S12: Add nano-barium sulfate to 3 times its volume of the modification solution and stir to modify it. After stirring, wash with water and dry to obtain nano-barium sulfate synergist.
[0064] In this embodiment, the stirring speed for the stirring modification is 500 r / min, the stirring time is 1 h, and the stirring temperature is 40℃.
[0065] In this embodiment, the defoamer is BYK065; the film-forming aid is propylene glycol butyl ether; and the rust converter is sodium aluminum phosphate rust converter.
[0066] The preparation method of a water-based rust converter in this embodiment includes the following steps: mixing water-based styrene-acrylic emulsion, nano-attapulgite coordinating compound modifier, nano-barium sulfate coordinating agent, rust converter, defoamer, and film-forming aid raw materials evenly to obtain the water-based rust converter.
[0067] Example 2.
[0068] This embodiment of a water-based rust converter comprises the following raw materials in parts by weight:
[0069] 55 parts of water-based styrene-acrylic emulsion, 20 parts of nano-attapulgite coordinating compound modifier, 9 parts of nano-barium sulfate coordinator, 6 parts of rust conversion agent, 5 parts of defoamer, and 3 parts of film-forming aid.
[0070] The preparation method of the nano-attapulgite synergistic compound liquid modifier in this embodiment is as follows:
[0071] S01: Add 6 parts of 5% (w / w) chitosan aqueous solution to 10 parts of lanthanum sulfate solution to obtain chitosan blended solution;
[0072] S02: Add 3 parts of silane coupling agent KH560 and 0.45 parts of triisostearoyl titanate isopropyl ester to the chitosan mixture, stir evenly, and finally add 3 parts of diisooctyl phosphate and stir thoroughly to obtain the compound solution.
[0073] S03: Add nano-attapulgite to 3 times the mass fraction of 2% hydrochloric acid solution and stir evenly. Then add 3% of the total amount of nano-attapulgite and 10% of hydrogen peroxide solution, stir thoroughly, and then wash with water and dry.
[0074] S04: Add the SO3 product to the compounding solution at a weight ratio of 1:5, then add 20% of the total amount of SO2 product as a modifier, stir thoroughly, then wash with water and dry to obtain the nano-attapulgite synergistic compounding solution modifier.
[0075] The lanthanum sulfate solution in this embodiment has a mass fraction of 15%.
[0076] The preparation method of the modifier in this embodiment is as follows:
[0077] Add 10% of the total carbon nanotubes to a barium nitrate aqueous solution, then add 3% of the total carbon nanotubes to sodium humate and 5% to phosphoric acid. Finally, put the mixture into a ball mill for ball milling at a speed of 1500 r / min for 30 min. After ball milling, wash with water and dry to obtain the modifier.
[0078] The mass fraction of the barium nitrate aqueous solution in this embodiment is 2%.
[0079] The preparation method of the nano-barium sulfate coordinator in this embodiment is as follows:
[0080] S11: Add 10 parts of tetra-n-propylzirconate to 20 parts of ethanol solvent, then add 4 parts of sodium dodecyl sulfate and 3 parts of hydrochloric acid, stir evenly, and finally add 4 parts of triethanolamine borate, stir thoroughly to obtain the modified solution.
[0081] S12: Add nano-barium sulfate to 5 times its volume of the modification solution and stir to modify it. After stirring, wash with water and dry to obtain nano-barium sulfate synergist.
[0082] In this embodiment, the stirring speed for the stirring modification is 1000 r / min, the stirring time is 2 h, and the stirring temperature is 50 °C.
[0083] In this embodiment, the defoamer is BYK065; the film-forming aid is propylene glycol butyl ether; and the rust converter is sodium aluminum phosphate rust converter.
[0084] The preparation method of a water-based rust converter in this embodiment includes the following steps: mixing water-based styrene-acrylic emulsion, nano-attapulgite coordinating compound modifier, nano-barium sulfate coordinating agent, rust converter, defoamer, and film-forming aid raw materials evenly to obtain the water-based rust converter.
[0085] Example 3.
[0086] This embodiment of a water-based rust converter comprises the following raw materials in parts by weight:
[0087] 50 parts of water-based styrene-acrylic emulsion, 17.5 parts of nano-attapulgite coordinating compound modifier, 7 parts of nano-barium sulfate coordinator, 4.5 parts of rust converter, 4 parts of defoamer, and 2 parts of film-forming aid.
[0088] The preparation method of the nano-attapulgite synergistic compound liquid modifier in this embodiment is as follows:
[0089] S01: Add 4.5 parts of a 5% (w / w) chitosan aqueous solution to 7.5 parts of a lanthanum sulfate solution to obtain a chitosan blended solution;
[0090] S02: Add 2 parts of silane coupling agent KH560 and 0.30 parts of triisostearoyl titanate isopropyl ester to the chitosan mixture, stir evenly, and finally add 2 parts of diisooctyl phosphate and stir thoroughly to obtain the compound solution.
[0091] S03: Add nano-attapulgite to 2.5 times the mass fraction of 2% hydrochloric acid solution and stir evenly. Then add 2% of the total amount of nano-attapulgite and 7.5% hydrogen peroxide solution, stir thoroughly, and then wash with water and dry.
[0092] S04: Add the SO3 product to the compounding solution at a weight ratio of 1:5, then add 15% of the total amount of SO2 product as a modifier, stir thoroughly, then wash with water and dry to obtain the nano-attapulgite coordinated compounding solution modifier.
[0093] The lanthanum sulfate solution in this embodiment has a mass fraction of 12.5%.
[0094] The preparation method of the modifier in this embodiment is as follows:
[0095] A barium nitrate aqueous solution containing 7.5% of the total carbon nanotubes was added to the carbon nanotubes, followed by sodium humate containing 2% of the total carbon nanotubes and phosphoric acid containing 3.5%. The mixture was then fed into a ball mill for ball milling at a speed of 1250 r / min for 25 min. After ball milling, the mixture was washed with water and dried to obtain the conditioning agent.
[0096] The mass fraction of the barium nitrate aqueous solution in this embodiment is 2%.
[0097] The preparation method of the nano-barium sulfate coordinator in this embodiment is as follows:
[0098] S11: Add 7.5 parts of tetra-n-propylzirconate to 15 parts of ethanol solvent, then add 3 parts of sodium dodecyl sulfate and 2 parts of hydrochloric acid, stir evenly, and finally add 3 parts of triethanolamine borate, stir thoroughly to obtain the modified solution.
[0099] S12: Add nano-barium sulfate to 4 times its volume of the modification solution and stir to modify it. After stirring, wash with water and dry to obtain nano-barium sulfate synergist.
[0100] In this embodiment, the stirring speed for the stirring modification is 750 r / min, the stirring time is 1.5 h, and the stirring temperature is 45 °C.
[0101] In this embodiment, the defoamer is BYK065; the film-forming aid is propylene glycol butyl ether; and the rust converter is sodium aluminum phosphate rust converter.
[0102] The preparation method of a water-based rust converter in this embodiment includes the following steps: mixing water-based styrene-acrylic emulsion, nano-attapulgite coordinating compound modifier, nano-barium sulfate coordinating agent, rust converter, defoamer, and film-forming aid raw materials evenly to obtain the water-based rust converter.
[0103] Comparative Example 1.
[0104] Unlike Example 3, no nano-attapulgite coordinating compound modifier was added.
[0105] Comparative Example 2.
[0106] Unlike Example 3, the nano-attapulgite coordinating compound liquid modifier is replaced by nano-attapulgite.
[0107] Comparative Example 3.
[0108] Unlike Example 3, no modifier was added in the preparation of the nano-attapulgite coordinated compound liquid modifier.
[0109] Comparative Example 4.
[0110] Unlike Example 3, chitosan conditioning solution was not added in the preparation of the conditioning solution.
[0111] Comparative Example 5.
[0112] Unlike Example 3, no nano-barium sulfate coordinator was added.
[0113] Comparative Example 6.
[0114] Unlike Example 3, the nano-barium sulfate coordinator was not treated with a modification solution.
[0115] Examples 1-3 and Comparative Examples 1-6 formed coatings with metal substrates, with a coating thickness of 2 mm. Performance tests were conducted as follows:
[0116]
[0117] As can be seen from Examples 1-3 and Comparative Examples 1-6, the bonding strength of the product in Example 3 of the present invention is excellent under normal conditions, after being soaked in water at 40°C for 2 hours and placed under 2% acid mist for 2 hours. It also exhibits excellent water resistance and acid corrosion resistance.
[0118] The product lacks either the nano-attapulgite coordinating compound modifier or the nano-barium sulfate coordinator, resulting in a significant decrease in adhesive strength. Furthermore, the product exhibits poor acid corrosion and water resistance. Additionally, the preparation of the nano-attapulgite coordinating compound modifier did not include a positional agent, the preparation of the compounding solution did not include chitosan mixing liquid, and the nano-barium sulfate coordinator was not treated with a modifier. Different methods of preparing the nano-attapulgite coordinating compound modifier and nano-barium sulfate coordinator all showed a trend of deteriorating product performance. Only the nano-attapulgite coordinating compound modifier and nano-barium sulfate coordinator prepared using the method of this invention showed the most significant performance improvement.
[0119] Meanwhile, when nano-attapulgite is used as a modifier in the synergistic compound solution, the product's performance is still inferior under acid corrosion conditions compared to the product without the addition of nano-attapulgite. Therefore, nano-attapulgite cannot be used as a substitute for the synergistic compound solution modifier alone. Only the nano-attapulgite synergistic compound solution modifier prepared by the method of this invention has the most significant performance effect.
[0120] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.
[0121] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A water-based rust converter, characterized in that, Including the following parts by weight of raw materials: The mixture comprises 45-55 parts of water-based styrene-acrylic emulsion, 15-20 parts of nano-attapulgite coordinating compound modifier, 5-9 parts of nano-barium sulfate coordinating agent, 3-6 parts of rust converter, 3-5 parts of defoamer, and 1-3 parts of film-forming aid; the preparation method of the nano-attapulgite coordinating compound modifier is as follows: S01: Add 3-6 parts of a 5% (w / w) chitosan aqueous solution to 5-10 parts of a lanthanum sulfate solution to obtain a chitosan blended solution; S02: Add 1-3 parts of silane coupling agent KH560 and 0.25-0.45 parts of triisostearoyl titanate isopropyl ester to the chitosan mixture, stir evenly, and finally add 1-3 parts of diisooctyl phosphate and stir thoroughly to obtain the compound solution. S03: Add nano-attapulgite to 2-3 times the mass fraction of 2% hydrochloric acid solution and stir evenly. Then add 1-3% of the total amount of nano-attapulgite and 5-10% of hydrogen peroxide solution, stir thoroughly, and then wash with water and dry. SO4: Add SO3 product to the compounding solution at a weight ratio of 1:5, then add 10-20% of the total amount of SO2 product as a modifier, stir thoroughly, then wash with water and dry to obtain the nano-attapulgite coordinating compounding solution modifier; the preparation method of the nano-barium sulfate coordinating agent is as follows: S11: Add 5-10 parts of tetra-n-propylzirconate to 10-20 parts of ethanol solvent, then add 2-4 parts of sodium dodecyl sulfate and 1-3 parts of hydrochloric acid, stir evenly, and finally add 2-4 parts of triethanolamine borate, stir thoroughly to obtain the modified solution. S12: Nano-barium sulfate is added to a 3-5 times volume of a modifying solution and stirred for modification. After stirring, it is washed with water and dried to obtain the nano-barium sulfate modifier. The preparation method of the modifier is as follows: Add 5-10% of the total amount of carbon nanotubes to a barium nitrate aqueous solution, then add 1-3% of the total amount of carbon nanotubes to sodium humate and 2-5% to phosphoric acid. Finally, put the mixture into a ball mill for ball milling at a speed of 1000-1500 r / min for 20-30 min. After ball milling, wash with water and dry to obtain the conditioning agent.
2. The water-based rust converter according to claim 1, characterized in that, The water-based rust converter comprises the following raw materials in parts by weight: 50 parts of water-based styrene-acrylic emulsion, 17.5 parts of nano-attapulgite coordinating compound modifier, 7 parts of nano-barium sulfate coordinator, 4.5 parts of rust converter, 4 parts of defoamer, and 2 parts of film-forming aid.
3. The water-based rust converter according to claim 1, characterized in that, The lanthanum sulfate solution has a mass fraction of 10-15%.
4. The water-based rust converter according to claim 1, characterized in that, The mass fraction of the barium nitrate aqueous solution is 2%.
5. The water-based rust converter according to claim 1, characterized in that, The stirring modification is carried out at a speed of 500-1000 r / min, a stirring time of 1-2 h, and a stirring temperature of 40-50℃.
6. The water-based rust converter according to claim 1, characterized in that, The defoamer is BYK065; the film-forming aid is propylene glycol butyl ether; and the rust converter is sodium aluminum phosphate rust converter.
7. A method for preparing a water-based rust converter as described in any one of claims 1-6, characterized in that, Includes the following steps: A water-based rust converter can be obtained by mixing water-based styrene-acrylic emulsion, nano-attapulgite coordinating compound modifier, nano-barium sulfate coordinator, rust converter, defoamer, and film-forming aid ingredients evenly.