CN109929454B - High-salt-spray washing-free waterborne chromium-free environment-friendly film forming agent for cast aluminum, method for forming metal surface protective layer by treatment and stirring device - Google Patents
High-salt-spray washing-free waterborne chromium-free environment-friendly film forming agent for cast aluminum, method for forming metal surface protective layer by treatment and stirring device Download PDFInfo
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Abstract
The invention relates to the technical field of metal surface treatment, and discloses a cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film forming agent, wherein 1 liter of the film forming agent comprises the following components in parts by weight: 30-50 g of modified water-based polymer resin, namely 3-50 g of fluozirconic acid; 3-50 g of fluotitanic acid; 3-50 g of film forming auxiliary agent; 0.5-5 g of wetting agent; 0.5-5 g of an active agent; 1-10 g of silane coupling agent; 0.2-5 g of acetic acid and the balance of water. The invention also discloses a method for forming a metal surface protective layer by adopting the cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film-forming agent for treatment. A stirring device is also disclosed. The technical effects are as follows: 1. the corrosion resistance is stronger; in the formula of the film forming agent, in the method for forming the metal surface protection layer by the cast aluminum surface treatment, no harmful substance is involved, no residue is generated, and a large amount of waste water is not formed, so that the method is more environment-friendly. 3. The film forming agent with more uniformity and higher quality can be obtained by the treatment of the stirring equipment, and the processing time can be shortened.
Description
Technical Field
The invention relates to a high-salt-spray washing-free waterborne chromium-free environment-friendly film forming agent for cast aluminum. The invention also relates to a method for forming a metal surface protective layer by adopting the cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film forming agent for treatment. The invention also relates to a stirring device for preparing the cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent.
Background
Cast aluminum materials are generally applied in industry, particularly are indispensable materials in automobile industry, but chromium elements are generally used in surface treatment of aluminum materials, and a large amount of wastewater and waste residues are generated in the process of using the chromium elements for surface treatment, so that how to avoid using the chromium materials in surface treatment of cast aluminum and other materials and how to efficiently prepare chromium-free film-forming agents becomes an industrial problem.
Disclosure of Invention
The invention aims to provide a cast aluminum high-salt-spray washing-free water-based chromium-free environment-friendly film forming agent which is lower in cost, higher in antibacterial property, quicker to prepare, more environment-friendly and higher in corrosion resistance of a finished product. The technical problem to be solved by the invention is also to provide a method for forming a metal surface protective layer by adopting the cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film forming agent for treatment, and the method can form a stronger protective layer and has stronger corrosion resistance. The technical problem to be solved by the invention is also to provide a stirring device for preparing the cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent.
Therefore, the invention provides the following technical scheme:
the cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film forming agent has the pH value controlled to be 1.5-3, and 1 liter of the film forming agent comprises the following components in parts by weight:
30-50 g of water-based resin:
3-50 g of fluozirconic acid;
3-50 g of fluotitanic acid;
3-50 g of film forming auxiliary agent;
0.5-5 g of wetting agent;
0.5-5 g of an active agent;
1-10 g of silane coupling agent;
acetic acid 0.2-5 g
The balance of water.
Further, the silver ion nano-meter comprises 1-3 g of nano silver ions.
The invention provides a method for forming a metal surface protective layer by adopting the cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film forming agent for treatment, which comprises the following steps:
A. forming an inner metal oxide coating on the metal surface, removing a partial outer surface layer of the inner metal oxide coating, and cleaning;
B. mixing the cast aluminum high-salt-spray washing-free waterborne chromium-free environment-friendly film forming agent and water according to the ratio of 1: 10-1: 18, and feeding the mixture into a stirring device for stirring;
C. coating the diluted cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent on the surface of cast aluminum, standing for 1-5 minutes, and then sending the cast aluminum after standing into a hot air device for quick air drying, wherein the air drying time is 30-50 seconds, and the temperature of hot air is controlled at 50-80 ℃.
Furthermore, in the step B, the stirring device is used for stirring during stirring, the stirring rod on the outer layer and the propeller blade on the inner layer are used for composite stirring during stirring, the stirring rod on the outer layer sufficiently and powerfully hits the stirring material, the propeller blade on the inner layer rotates to form a vortex, the mixing material is concentrated at the position of the propeller blade on the inner layer, and the propeller blade gently rotates and stirs the internal mixing material.
The stirring device for preparing the cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent comprises a top cover, a stirring box and a base, the top cover is connected with the top of the stirring box through threads, the right side of the stirring box is fixedly connected with the equipment box through screws, a discharge port is arranged at the lower end of the left side of the stirring box, a drawing plate is arranged on the discharge port and is connected with the discharge port in a sliding manner, the bottom of the stirring box is fixedly connected with the base, a motor is arranged at the bottom of the base inside the base, the upper end of the motor is fixedly connected with the speed reducer, the upper end of the motor is fixedly connected with the rotating shaft, and the rotating shaft penetrates through the speed reducer, the rotating shaft is arranged in the stirring box, the rotating shaft is provided with a propeller blade, the both sides of pivot all are provided with the puddler, and the radius of rotation of puddler is greater than propeller blade's radius of rotation.
The invention has the technical effects that:
1. the corrosion resistance is stronger, the traditional product can only meet the salt spray test for 24 hours generally, the surface coating formed by the film forming agent can meet the salt spray test for 150 hours, if the method for forming the metal surface protection layer by treatment is adopted, the film forming agent is adopted to form the protection film layer after the inner metal oxide coating is formed, so that the protection effect is stronger, the hard oxidation film layer can be formed, the salt spray test for more than 500 hours can be achieved, the abrasion is less, the hardness of the surface of cast aluminum is greatly improved, and the defect of insufficient hardness of the surface of the cast aluminum is overcome.
2. In the formula of the film forming agent, in the method for forming the metal surface protection layer by the cast aluminum surface treatment, no harmful substance is involved, no residue is generated, and a large amount of waste water is not formed, so that the method is more environment-friendly.
3. The production equipment provided by the invention has the following technical effects: the propeller blade of its inlayer and the puddler complex stirring of inlayer, this kind of composite construction forms rotatory vortex when the stirring, can concentrate the mixture to the propeller blade's of inlayer position, propeller blade can be to the rotatory stirring of inside mixture, it is gentle relatively, be favorable to the material mixing reaction, and the puddler of inlayer can make outer material beat by abundant brute force and homogenize, and gradually in being concentrated the rotatory vortex coverage's that forms of the propeller blade of inlayer under the effect of inside vortex, thereby obtain more even and the higher film-forming agent of quality, and can shorten process time.
4. The addition of silver ions in the formed film layer is beneficial to obtaining the bactericidal effect and is beneficial to forming the antibacterial and bacteriostatic effects in the surface treatment of some interior fittings.
5. In the method for forming the metal surface protection layer by surface treatment of the cast aluminum, liquid resin containing silver ions and an antibacterial amphiphilic biochar material is coated on the surface of a film forming agent before air drying, then the film forming agent is naturally dried to form a film layer which is attached to the film layer formed by the film forming agent and has mutual interference, so that the surface film layer obtains better human skin touch, the cold touch is reduced, the surface film layer is more skin-friendly, the sterilization and bacteriostasis effects of the surface film layer are improved, the cast aluminum material can be greatly used for interior decoration in automobiles, and the grade is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the stirring apparatus of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the invention, the pH value of the cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film forming agent is controlled to be 1.5-3, and 1 liter of the film forming agent comprises the following components in parts by weight:
30-50 g of water-based resin:
3-50 g of fluozirconic acid;
3-50 g of fluotitanic acid;
3-50 g of film forming auxiliary agent;
0.5-5 g of wetting agent;
0.5-5 g of an active agent;
1-10 g of silane coupling agent;
acetic acid 0.2-5 g
The balance of water.
The film-forming agent is prepared by sequentially adding, mixing and stirring the materials.
Film-forming agent example 1: the pH value is controlled to be 1.2, 1 liter of the film forming agent comprises the following components in parts by weight:
aqueous resin 43 g:
21 grams of fluorozirconic acid;
8 g of fluotitanic acid;
12 g of film-forming auxiliary agent;
1.2 g of wetting agent;
2 g of active agent;
3.5 g of silane coupling agent;
acetic acid 3 g
The balance of water.
The film smoke test of example 1 above can reach 155 hours.
Film-forming agent example 2: the pH value is controlled to be 1.8, 1 liter of the film forming agent comprises the following components in parts by weight:
aqueous resin 35 g:
18 grams of fluorozirconic acid;
12 g of fluotitanic acid;
15 g of film-forming auxiliary agent;
2 g of wetting agent;
3 g of active agent;
5.5 g of silane coupling agent;
acetic acid 2 g
2 g of nano silver ion
The balance of water.
The film smoke test of example 2 above can reach 160 hours.
Film former example 3: the pH value of the film forming agent is controlled to be 2, 1 liter, and the film forming agent comprises the following components in parts by weight:
32 g of water-based resin:
20 grams of fluorozirconic acid;
18 g of fluotitanic acid;
12 g of film-forming auxiliary agent;
3 g of wetting agent;
3 g of active agent;
6 g of silane coupling agent;
acetic acid 2.2 g
2 g of nano silver ion
The balance of water.
The film smoke test of example 3 above can reach 170 hours.
The invention provides a method for forming a metal surface protective layer by adopting the cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film forming agent for treatment, which comprises the following steps:
A. forming an inner metal oxide coating on the metal surface, forming the inner metal oxide coating by adopting a micro-arc oxidation method, removing a local outer surface layer of the inner metal oxide coating, and cleaning;
B. mixing the cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent and water according to a ratio of 1: 10-1: 18, and feeding the mixture into a stirring device for stirring, wherein the cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent and the water are mixed according to a ratio of 1:15 in the embodiment;
C. coating the diluted cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent on the surface of cast aluminum, standing for 1-5 minutes, and then sending the cast aluminum after standing into a hot air device for quick air drying, wherein the air drying time is 30-50 seconds, and the temperature of hot air is controlled at 50-80 ℃. In the step, the film forming agent can be formed by naturally airing at normal temperature, but moisture can be quickly removed by hot air treatment, so that the fluozirconic acid, fluotitanic acid and the water-based resin can quickly form a film layer, the hardness can be improved, and the film forming agent is preferably dried for 30 seconds by multi-party tests and the hot air is preferably controlled at 60 DEG
In the step B, the stirring device is adopted for stirring during stirring, the stirring rod on the inner layer and the stirring rod on the outer layer are used for composite stirring during stirring, the stirring rod on the outer layer sufficiently and powerfully hits and stirs the stirring substances, the stirring blade on the inner layer rotates to form a vortex, the mixing substances are concentrated to the position of the stirring blade on the inner layer, and the propeller blades perform soft rotary stirring on the internal mixing substances.
And C, coating the liquid resin containing the silver ions and the antibacterial amphipathic biochar material on the surface of the film forming agent before air drying, and then naturally drying.
Referring to fig. 1, the stirring device for preparing the cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent provided by the invention comprises a top cover 1, a stirring tank 2 and a base 3, wherein the top cover 1 is connected with the top of the stirring tank 2 through threads, the right side of the stirring tank 2 is fixedly connected with an equipment box 9 through screws, the lower end of the left side of the stirring tank 2 is provided with a discharge hole 10, the discharge hole 10 is provided with a pulling plate 11, the pulling plate 11 is connected with the discharge hole 10 in a sliding manner, the bottom of the stirring tank 2 is fixedly connected with the base 3, the inner side of the base 3 is provided with a motor 4 at the bottom of the base 3, the upper end of the motor 4 is fixedly connected with a speed reducer 5, the upper end of the motor 4 is fixedly connected with a rotating shaft 6, the rotating shaft 6 penetrates through the speed reducer 5, the rotating shaft 6 is arranged inside the stirring tank 2, and the rotating shaft 6 is provided with a spiral blade 7, the 6 both sides of pivot all are provided with puddler 8, and puddler 8's radius of rotation is greater than propeller blade 7's radius of rotation.
In the above embodiment, the upper end of the right side of the top cover 1 is provided with the water inlet 13. Draw 11 upper ends left sides of board and be provided with bolt 12, draw board 11 and pass through bolt 12 and agitator tank 2 fixed connection, 2 inside bottoms of agitator tank are provided with hang plate 14, and the hang plate 14 left side is connected with discharge gate 10.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A method for forming a metal surface protective layer by treating a cast aluminum high-salt spray washing-free water-based chromium-free environment-friendly film forming agent is characterized by comprising the following steps of: the pH value of the cast aluminum high-salt-spray washing-free water-based chromium-free environment-friendly film forming agent is controlled to be 2, 1 liter, and the film forming agent comprises the following components in parts by weight:
aqueous resin 43 g:
21 grams of fluorozirconic acid;
8 g of fluotitanic acid;
12 g of film-forming auxiliary agent;
1.2 g of wetting agent;
2 g of active agent;
3.5 g of silane coupling agent;
acetic acid 3 g
The balance of water;
the method comprises the following steps:
A. forming an inner metal oxide coating on the metal surface, removing a partial outer surface layer of the inner metal oxide coating, and cleaning;
B. mixing the cast aluminum high-salt-spray washing-free waterborne chromium-free environment-friendly film forming agent with water according to the ratio of 1: 10-1: 18, feeding the mixture into a stirring device for stirring, stirring by using the stirring device during stirring, performing composite stirring by using a screw blade on an inner layer and a stirring rod on an outer layer during stirring, fully and powerfully beating the stirring substances by using the stirring rod on the outer layer, rotating the screw blade on the inner layer to form a vortex, concentrating the mixed substances to the position of the screw blade on the inner layer, and performing soft rotary stirring on the internal mixed substances by using a propeller blade;
the stirring device comprises a top cover (1), a stirring box (2) and a base (3), wherein the top cover (1) is connected with the top of the stirring box (2) through threads, the right side of the stirring box (2) is fixedly connected with an equipment box (9) through screws, a discharge port (10) is arranged at the lower end of the left side of the stirring box (2), a drawing plate (11) is arranged on the discharge port (10), the drawing plate (11) is connected with the discharge port (10) in a sliding manner, the bottom of the stirring box (2) is fixedly connected with the base (3), a motor (4) is arranged at the bottom of the base (3) inside the base (3), the upper end of the motor (4) is fixedly connected with a speed reducer (5), the upper end of the motor (4) is fixedly connected with a rotating shaft (6), the rotating shaft (6) penetrates through the speed reducer (5), and the rotating shaft (6) is arranged inside the stirring box (2), the rotating shaft (6) is provided with a propeller blade (7), stirring rods (8) are arranged on two sides of the rotating shaft (6), and the rotating radius of each stirring rod (8) is larger than that of the propeller blade (7); a water inlet (13) is formed in the upper end of the right side of the top cover (1); a bolt (12) is arranged on the left side of the upper end of the drawing plate (11), the drawing plate (11) is fixedly connected with the stirring box (2) through the bolt (12), an inclined plate (14) is arranged at the bottom end inside the stirring box (2), and the left side of the inclined plate (14) is connected with the discharge hole (10);
C. coating the diluted cast aluminum high-salt spray washing-free waterborne chromium-free environment-friendly film forming agent on the surface of cast aluminum, standing for 1-5 minutes, and then sending the cast aluminum after standing into a hot air device for quick air drying, wherein the air drying time is 30-50 seconds, and the temperature of hot air is controlled at 50-80 ℃; coating liquid resin containing silver ions and an antibacterial amphiphilic biochar material on the surface of a film forming agent before air drying, and then naturally drying.
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| CN201910132590.6A CN109929454B (en) | 2019-02-22 | 2019-02-22 | High-salt-spray washing-free waterborne chromium-free environment-friendly film forming agent for cast aluminum, method for forming metal surface protective layer by treatment and stirring device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205269657U (en) * | 2015-12-29 | 2016-06-01 | 江苏万邦新型建材有限公司 | Reaction kettle |
| CN105951077A (en) * | 2016-05-31 | 2016-09-21 | 安徽开林新材料股份有限公司 | Passivation treating fluid for surface of steel |
| CN109207974A (en) * | 2017-06-29 | 2019-01-15 | 南京海印通信设备有限公司 | A kind of metal surface passivation treating liquid |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205269657U (en) * | 2015-12-29 | 2016-06-01 | 江苏万邦新型建材有限公司 | Reaction kettle |
| CN105951077A (en) * | 2016-05-31 | 2016-09-21 | 安徽开林新材料股份有限公司 | Passivation treating fluid for surface of steel |
| CN109207974A (en) * | 2017-06-29 | 2019-01-15 | 南京海印通信设备有限公司 | A kind of metal surface passivation treating liquid |
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