CN112281166A - High-temperature environment-friendly alkali sand aluminum profile surface treatment process - Google Patents
High-temperature environment-friendly alkali sand aluminum profile surface treatment process Download PDFInfo
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- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
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Abstract
The invention relates to the technical field of tension belt production, in particular to a surface treatment process for a high-temperature environment-friendly alkali sand aluminum profile; the self-made degreasing agent can be used for dragging oil stains on the surface of the aluminum profile into inorganic liquid phase deionized water, so that the effect of deeply decontaminating the surface of the aluminum profile is achieved; the hole sealing agent can be used for sealing holes on the surface of the aluminum profile, so that chemical or electrochemical corrosion of the coating on the surface of the aluminum profile and a matrix is effectively reduced, and the corrosion resistance of the aluminum profile is improved; compared with the existing degreasing agent, the degreasing agent does not contain sulfuric acid, and the hole sealing agent does not contain heavy metal ions such as nickel and the like, so that the degreasing agent is environment-friendly; the hydrogen is effectively collected in the high-temperature alkali sand process, so that the probability that the surface treatment quality of the aluminum profile is influenced due to the combustion of the generated hydrogen on the surface of the aluminum profile is effectively reduced; moreover, the collected hydrogen can be used as other chemical raw materials and fuels, and the reasonable utilization of resources is realized.
Description
Technical Field
The invention relates to the technical field of aluminum profile treatment, in particular to a high-temperature environment-friendly alkali sand aluminum profile surface treatment process.
Background
The density of the aluminum profile is only 2.7g/cm3, which is about 1/3 of the density of steel, copper or brass (7.83 g/cm3, 8.93g/cm3, respectively). Aluminum can exhibit excellent corrosion resistance under most environmental conditions, including in air, water (or brine), petrochemistry, and many chemical systems.
In view of the above-mentioned excellent properties, aluminum profiles are increasingly used in engineering. But the aluminum profile used in the current market has the following defects when the surface of the aluminum profile is treated:
1. in the prior art, strong acid (such as sulfuric acid) is mostly adopted to remove grease or dirt on the surface of the copper-nickel alloy, and a hole sealing agent containing heavy metal nickel elements is adopted to seal the copper-nickel alloy hole, so that the copper-nickel alloy causes pollution and damage to the environment and is not environment-friendly.
2. During the high-temperature alkali sand treatment of the aluminum profile, hydrogen generated by the aluminum profile is combusted on the surface of the aluminum profile, so that the quality of the surface treatment of the aluminum profile is influenced; moreover, it is also a waste of energy.
3. The aluminum profile treated by the existing process has relatively poor corrosion resistance, and the wear resistance and the quality of a paint film on the surface of the aluminum profile are required to be improved.
Therefore, the technology for treating the surface of the high-temperature environment-friendly alkali sand aluminum profile becomes a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the surface treatment process for the high-temperature environment-friendly alkali sand aluminum profile, and the surface of the aluminum profile is treated by the process provided by the invention, so that the corrosion resistance of the aluminum profile and the wear resistance of a paint film on the surface of the aluminum profile can be effectively improved; moreover, heavy metal ions are not generated in the treatment process, so that the method is environment-friendly; in addition, the invention can also effectively collect hydrogen generated in the high-temperature alkali sand process, thereby effectively ensuring the quality of surface treatment of the aluminum profile; moreover, the collected hydrogen can be used as other chemical raw materials and fuels, and the reasonable utilization of resources is realized.
In order to achieve the purpose, the invention provides the following technical scheme:
a surface treatment process for high-temperature environment-friendly alkali sand aluminum profiles comprises the following steps:
s1, hanging the aluminum profile with the surface to be processed on a bent frame; placing the hung aluminum profile in a degreasing tank, and carrying out ultrasonic vibration treatment on the degreasing agent with the temperature of 45-60 ℃ in the degreasing tank for 5-10 min; then, hanging the aluminum profile out and dripping the aluminum profile, then transferring the aluminum profile into a water washing tank for ultrasonic washing for 2-3 times, wherein the ultrasonic washing time is 100-200 s each time, and obtaining a degreased aluminum profile;
s2, placing the aluminum profile processed in the step S1 in a pure water tank, and cleaning the aluminum profile at room temperature for 5-8 min; then placing the aluminum profile into a heating tank with a gas guide pipe arranged at the top, wherein the other end of the gas guide pipe is communicated with a gas storage tank, adding a proper amount of alkali liquor into the heating tank, raising the temperature of the alkali liquor in the tank to 90-105 ℃, and soaking the aluminum profile for 3-7 min in alkali;
s3, carrying out pure water washing twice at room temperature on the aluminum profile after alkali washing, wherein the washing time is 4-6 min each time; then placing the aluminum profile after washing in a neutralizing tank containing acid liquor, neutralizing the aluminum profile after washing with alkali at room temperature for 3-5 min, and quickly placing the aluminum profile into a clear water tank after the residual liquid is completely dripped on a lifting frame of the aluminum profile after treatment; washing at room temperature for 2-4 min to obtain a neutralized aluminum profile;
s4, placing the neutralized aluminum profile into a polishing tank containing polishing liquid, polishing for 2-3 min, and then placing the polished aluminum profile into a water washing tank to clean to obtain a polished aluminum profile;
s5, placing the polished aluminum profile into acid liquor at the temperature of 18-25 ℃ for anodic oxidation treatment for 25-35 min, and then washing the aluminum profile subjected to anodic oxidation treatment twice at room temperature for 3-5 min;
s6, placing the aluminum profile after oxidation treatment in a coloring groove, and starting electrifying and coloring after soaking for 1-2 min; after coloring is started, the coloring voltage is increased to 14-18V within 30s smoothly, and then the voltage is kept stable and unchanged until coloring is finished; after coloring, carrying out secondary acid washing on the aluminum profile;
s7, transferring the colored aluminum profile into a hole sealing pool, and sealing the hole of the aluminum profile by using a hole sealing agent in the pool to seal the porous membrane layer; wherein, the technological parameters of the hole sealing treatment are as follows: the temperature is 10-30 ℃, the time is 3-10 min, and the pH is 5.5-6.5; after hole sealing is finished, the bent frame is lifted and inclined, after hole sealing liquid is dripped, the aluminum profile is placed into a pure water tank at room temperature for pure water washing, and the time of pure water washing is 3-5 min; washing the aluminum profile with hot pure water for 4-5 min; then, carrying out air drying treatment on the aluminum profile after washing;
s8, unloading after the treatment of the procedures; and then packaging and warehousing the qualified aluminum profiles according to the regulations to obtain the high-resistance electrophoresis aluminum profiles.
Further, the degreasing agent used in step S1 is prepared by: accurately weighing 15-20 parts of sodium carbonate, 6-9 parts of sodium silicate, 5-10 parts of penetrant OEP-70 and 8-12 parts of OP emulsifier by weight parts, and then ultrasonically mixing the penetrant OEP-70 and the OP emulsifier with 200-250 parts of deionized water to obtain the degreasing agent.
Furthermore, the alkali solution used in the step S2 is 1.0-1.3 mol/L sodium hydroxide solution.
Furthermore, the acid solution used in step S3 is a sulfuric acid solution of 1.2 to 1.5 mol/L.
Further, the polishing solution in step S4 is prepared by mixing 1.7g/ml phosphoric acid and 1.84g/ml sulfuric acid in a volume ratio of 3: 1.
Furthermore, the acid solution used in step S5 is a sulfuric acid solution of 1.5 to 1.8 mol/L.
Further, the current density in the anodizing treatment in the step S5 is 110 to 140A/m2。
Further, when the aluminum profile is twice pickled in the step S6, the pH of the hydrochloric acid solution used in the first pickling is 2.5 to 3.2, and the pH of the hydrochloric acid solution used in the second pickling is 4.2 to 4.8.
Further, the temperature of the hot pure water used in the step S7 is 60-75 ℃.
Furthermore, when the aluminum profile is subjected to hole sealing treatment in the step S7, the using amount of the hole sealing agent is 5-8 g/L; the composite material is prepared from the following raw materials in parts by weight: 14-17 parts of calcium (magnesium) acetate tetrahydrate, 0.5-1.2 parts of benzoic acid/sodium benzoate, 0.4-1.0 part of sodium gluconate, 0.6-1.0 part of isoamyl alcohol, 1.8-2.6 parts of fatty glyceride and 75-85 parts of water.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
1. the penetrating agent OEP-70 in the degreasing agent can accelerate the effective components of the degreasing agent to penetrate into gaps on the surface of the aluminum profile, and then ultrasonic oscillation treatment is matched, so that an OP emulsifier, sodium carbonate and sodium silicate in the degreasing agent can be in full contact with oil stains on the surface of the aluminum profile, organic functional groups in the OP emulsifier and organic functional groups in the oil stains interact, and finally the oil stains on the surface of the aluminum profile are pulled into deionized water in an inorganic liquid phase, and the effect of deeply decontaminating the surface of the aluminum profile is achieved. Provides a good foundation for other subsequent processing procedures of the aluminum profile. In addition, the self-made hole sealing agent can be used for sealing holes on the surface of the aluminum profile, so that the probability of failure of the coating due to chemical or electrochemical corrosion of the coating on the surface of the aluminum profile and a matrix is effectively reduced, the corrosion resistance of the coating is effectively improved, and the corrosion resistance of the aluminum profile is also improved.
2. Compared with the existing degreasing agent, the degreasing agent does not contain sulfuric acid, and the hole sealing agent does not contain heavy metal ions such as nickel, so that the hole sealing agent is environment-friendly. The hydrogen is effectively collected in the high-temperature alkali sand process, so that the probability that the surface treatment quality of the aluminum profile is influenced due to the combustion of the generated hydrogen on the surface of the aluminum profile is effectively reduced; moreover, the collected hydrogen can be used as other chemical raw materials and fuels, and the reasonable utilization of resources is realized.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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.
The present invention will be further described with reference to the following examples.
Example 1
A surface treatment process for high-temperature environment-friendly alkali sand aluminum profiles comprises the following steps:
s1, hanging the aluminum profile with the surface to be processed on a bent frame; placing the hung aluminum profile in a degreasing tank, and carrying out ultrasonic vibration treatment on the degreasing agent with the temperature of 45 ℃ in the degreasing tank for 5 min; then, hanging the aluminum profile out and dripping the aluminum profile, then transferring the aluminum profile into a water washing tank for ultrasonic washing for 2 times, wherein the ultrasonic washing time is 100s each time, and obtaining a degreased aluminum profile;
s2, placing the aluminum profile processed in the step S1 in a pure water tank, and cleaning the aluminum profile at room temperature for 5 min; then placing the aluminum profile into a heating tank with a gas guide pipe at the top, wherein the other end of the gas guide pipe is communicated with a gas storage tank, adding a proper amount of alkali liquor into the heating tank, raising the temperature of the alkali liquor in the tank to 90 ℃, and soaking the aluminum profile in the alkali for 3 min;
s3, carrying out pure water washing twice at room temperature on the aluminum profile subjected to alkali washing, wherein the washing time is 4min each time; then placing the aluminum profile after washing in a neutralizing tank containing acid liquor, neutralizing the aluminum profile after washing with alkali at room temperature for 3min, and quickly placing the aluminum profile into a clear water tank after the residual liquid is completely dripped in an inclined manner by a lifting frame of the aluminum profile after treatment; washing with water at room temperature for 2min to obtain a neutralized aluminum profile;
s4, placing the neutralized aluminum profile into a polishing tank containing polishing liquid, polishing for 2min, and then placing the polished aluminum profile into a water washing tank to clean to obtain a polished aluminum profile;
s5, placing the polished aluminum profile into acid liquor at the temperature of 18 ℃ for anodizing treatment for 25min, and then washing the anodized aluminum profile twice at room temperature for 3 min;
s6, placing the aluminum profile after oxidation treatment in a coloring groove, and starting electrifying and coloring after soaking for 1 min; after coloring is started, the coloring voltage is stably increased to 14V within 30s, and then the voltage is kept stable and unchanged until coloring is finished; after coloring, carrying out secondary acid washing on the aluminum profile;
s7, transferring the colored aluminum profile into a hole sealing pool, and sealing the hole of the aluminum profile by using a hole sealing agent in the pool to seal the porous membrane layer; wherein, the technological parameters of the hole sealing treatment are as follows: the temperature is 10 deg.C, the time is 3min, and the pH is 5.5; after hole sealing is finished, the bent frame is lifted and inclined, and after hole sealing liquid is dripped, the aluminum profile is placed into a pure water tank at room temperature for pure water washing for 3 min; washing the aluminum profile with hot pure water for 4 min; then, carrying out air drying treatment on the aluminum profile after washing;
s8, unloading after the treatment of the procedures; and then packaging and warehousing the qualified aluminum profiles according to the regulations to obtain the high-resistance electrophoresis aluminum profiles.
The preparation method of the degreasing agent used in the step S1 comprises the following steps: accurately weighing 15 parts of sodium carbonate, 6 parts of sodium silicate, 5 parts of penetrant OEP-70 and 8 parts of OP emulsifier according to parts by weight, and then ultrasonically mixing the mixture with 200 parts of deionized water to obtain the degreasing agent.
The alkali liquor used in step S2 is 1.0mol/L sodium hydroxide solution.
The acid solution used in step S3 was a 1.2mol/L sulfuric acid solution.
The polishing solution in step S4 is prepared by mixing 1.7g/ml phosphoric acid and 1.84g/ml sulfuric acid according to the volume ratio of 3: 1.
The acid solution used in step S5 was a 1.5mol/L sulfuric acid solution.
In the case of the anodization in step S5, the current density was 110A/m2。
In step S6, when the aluminum profile is subjected to two acid pickups, the pH of the hydrochloric acid solution used in the first acid pickups is 2.5, and the pH of the hydrochloric acid solution used in the second acid pickups is 4.2.
The temperature of the hot pure water used in step S7 was 60 ℃.
When hole sealing treatment is carried out on the aluminum profile in the step S7, the using amount of the hole sealing agent is 5 g/L; the composite material is prepared from the following raw materials in parts by weight: 14 parts of calcium (magnesium) acetate tetrahydrate, 0.5 part of benzoic acid/sodium benzoate, 0.4 part of sodium gluconate, 0.6 part of isoamyl alcohol, 1.8 parts of fatty glyceride and 75 parts of water.
Example 2
A surface treatment process for high-temperature environment-friendly alkali sand aluminum profiles comprises the following steps:
s1, hanging the aluminum profile with the surface to be processed on a bent frame; placing the hung aluminum profile in a degreasing tank, and carrying out ultrasonic vibration treatment on a degreasing agent with the temperature of 50 ℃ in the degreasing tank for 8 min; then, hanging the aluminum profile out and dripping the aluminum profile, then transferring the aluminum profile into a water washing tank for ultrasonic washing for 2 times, wherein the ultrasonic washing time is 150s each time, and obtaining a degreased aluminum profile;
s2, placing the aluminum profile processed in the step S1 in a pure water tank, and cleaning the aluminum profile at room temperature for 6 min; then placing the aluminum profile into a heating tank with a gas guide pipe at the top, wherein the other end of the gas guide pipe is communicated with a gas storage tank, adding a proper amount of alkali liquor into the heating tank, raising the temperature of the alkali liquor in the tank to 100 ℃, and soaking the aluminum profile in the alkali for 5 min;
s3, carrying out pure water washing twice at room temperature on the aluminum profile subjected to alkali washing, wherein the washing time is 5min each time; then placing the aluminum profile after washing in a neutralizing tank containing acid liquor, neutralizing the aluminum profile after washing with alkali at room temperature for 4min, and quickly placing the aluminum profile into a clear water tank after the residual liquid is completely dripped in an inclined manner by a lifting frame of the aluminum profile after treatment; washing with water at room temperature for 3min to obtain a neutralized aluminum profile;
s4, placing the neutralized aluminum profile into a polishing tank containing polishing liquid, polishing for 2min, and then placing the polished aluminum profile into a water washing tank to clean to obtain a polished aluminum profile;
s5, placing the polished aluminum profile into acid liquor at the temperature of 20 ℃ for anodizing treatment for 30min, and then washing the anodized aluminum profile twice at room temperature for 4 min;
s6, placing the aluminum profile after oxidation treatment in a coloring groove, and starting electrifying and coloring after soaking for 1 min; after coloring is started, the coloring voltage is smoothly increased to 16V within 30s, and then the voltage is kept stable and unchanged until coloring is finished; after coloring, carrying out secondary acid washing on the aluminum profile;
s7, transferring the colored aluminum profile into a hole sealing pool, and sealing the hole of the aluminum profile by using a hole sealing agent in the pool to seal the porous membrane layer; wherein, the technological parameters of the hole sealing treatment are as follows: the temperature is 20 deg.C, the time is 6min, and the pH is 6.0; after hole sealing is finished, the bent frame is lifted and inclined, and after hole sealing liquid is dripped, the aluminum profile is placed into a pure water tank at room temperature for pure water washing for 4 min; washing the aluminum profile with hot pure water for 4 min; then, carrying out air drying treatment on the aluminum profile after washing;
s8, unloading after the treatment of the procedures; and then packaging and warehousing the qualified aluminum profiles according to the regulations to obtain the high-resistance electrophoresis aluminum profiles.
The preparation method of the degreasing agent used in the step S1 comprises the following steps: accurately weighing 18 parts of sodium carbonate, 8 parts of sodium silicate, 7 parts of penetrant OEP-70 and 10 parts of OP emulsifier according to parts by weight, and then ultrasonically mixing the mixture with 220 parts of deionized water to obtain the degreasing agent.
The alkali liquor used in step S2 is 1.2mol/L sodium hydroxide solution.
The acid solution used in step S3 was a 1.4mol/L sulfuric acid solution.
The polishing solution in step S4 is prepared by mixing 1.7g/ml phosphoric acid and 1.84g/ml sulfuric acid according to the volume ratio of 3: 1.
The acid solution used in step S5 was a 1.6mol/L sulfuric acid solution.
In the case of the anodization in step S5, the current density was 130A/m2。
In step S6, when the aluminum profile is subjected to two acid pickups, the pH of the hydrochloric acid solution used in the first acid pickups is 3.0, and the pH of the hydrochloric acid solution used in the second acid pickups is 4.5.
The temperature of the hot pure water used in step S7 was 65 ℃.
When hole sealing treatment is carried out on the aluminum profile in the step S7, the using amount of the hole sealing agent is 6 g/L; the composite material is prepared from the following raw materials in parts by weight: 15 parts of calcium (magnesium) acetate tetrahydrate, 1.0 part of benzoic acid/sodium benzoate, 0.8 part of sodium gluconate, 0.9 part of isoamyl alcohol, 2.2 parts of fatty glyceride and 80 parts of water.
Example 3
A surface treatment process for high-temperature environment-friendly alkali sand aluminum profiles comprises the following steps:
s1, hanging the aluminum profile with the surface to be processed on a bent frame; placing the hung aluminum profile in a degreasing tank, and carrying out ultrasonic vibration treatment on the degreasing agent with the temperature of 60 ℃ in the degreasing tank for 10 min; then, the aluminum profile is lifted out and dripped to be dried, and then the aluminum profile is transferred into a water washing tank to be ultrasonically washed for 3 times, wherein the ultrasonic washing time is 200s each time, so that the degreased aluminum profile is obtained;
s2, placing the aluminum profile processed in the step S1 in a pure water tank, and cleaning the aluminum profile at room temperature for 8 min; then placing the aluminum profile into a heating tank with a gas guide pipe at the top, wherein the other end of the gas guide pipe is communicated with a gas storage tank, adding a proper amount of alkali liquor into the heating tank, raising the temperature of the alkali liquor in the tank to 105 ℃, and carrying out alkali soaking on the aluminum profile for 7 min;
s3, carrying out pure water washing twice at room temperature on the aluminum profile subjected to alkali washing, wherein the washing time is 6min each time; then placing the aluminum profile after washing in a neutralizing tank containing acid liquor, neutralizing the aluminum profile after washing with alkali at room temperature for 5min, and quickly placing the aluminum profile into a clear water tank after the residual liquid is completely dripped in an inclined manner by a lifting frame of the aluminum profile after treatment; washing with water at room temperature for 4min to obtain a neutralized aluminum profile;
s4, placing the neutralized aluminum profile into a polishing tank containing polishing liquid, polishing for 2-3 min, and then placing the polished aluminum profile into a water washing tank to clean to obtain a polished aluminum profile;
s5, placing the polished aluminum profile into acid liquor at the temperature of 25 ℃ for anodizing treatment for 35min, and then washing the anodized aluminum profile twice at room temperature for 5 min;
s6, placing the aluminum profile after oxidation treatment in a coloring groove, and starting electrifying and coloring after soaking for 2 min; after coloring is started, the coloring voltage is smoothly increased to 18V within 30s, and then the voltage is kept stable and unchanged until coloring is finished; after coloring, carrying out secondary acid washing on the aluminum profile;
s7, transferring the colored aluminum profile into a hole sealing pool, and sealing the hole of the aluminum profile by using a hole sealing agent in the pool to seal the porous membrane layer; wherein, the technological parameters of the hole sealing treatment are as follows: the temperature is 30 ℃, the time is 10min, and the pH is 6.5; after hole sealing is finished, the bent frame is lifted and inclined, and after hole sealing liquid is dripped, the aluminum profile is placed into a pure water tank at room temperature for pure water washing for 5 min; washing the aluminum profile with hot pure water for 5 min; then, carrying out air drying treatment on the aluminum profile after washing;
s8, unloading after the treatment of the procedures; and then packaging and warehousing the qualified aluminum profiles according to the regulations to obtain the high-resistance electrophoresis aluminum profiles.
The preparation method of the degreasing agent used in the step S1 comprises the following steps: accurately weighing 20 parts of sodium carbonate, 9 parts of sodium silicate, 10 parts of penetrant OEP-70 and 12 parts of OP emulsifier according to parts by weight, and then ultrasonically mixing the penetrant OEP-70 and the OP emulsifier with 250 parts of deionized water to obtain the degreasing agent.
The alkali liquor used in step S2 is 1.3mol/L sodium hydroxide solution.
The acid solution used in step S3 was a 1.5mol/L sulfuric acid solution.
The polishing solution in step S4 is prepared by mixing 1.7g/ml phosphoric acid and 1.84g/ml sulfuric acid according to the volume ratio of 3: 1.
The acid solution used in step S5 was a 1.8mol/L sulfuric acid solution.
In the case of the anodization in step S5, the current density was 140A/m2。
In step S6, when the aluminum profile is subjected to two acid pickups, the pH of the hydrochloric acid solution used in the first acid pickups is 3.2, and the pH of the hydrochloric acid solution used in the second acid pickups is 4.8.
The temperature of the hot pure water used in step S7 was 75 ℃.
When hole sealing treatment is carried out on the aluminum profile in the step S7, the using amount of the hole sealing agent is 8 g/L; the composite material is prepared from the following raw materials in parts by weight: 17 parts of calcium (magnesium) acetate tetrahydrate, 1.2 parts of benzoic acid/sodium benzoate, 1.0 part of sodium gluconate, 1.0 part of isoamyl alcohol, 2.6 parts of fatty glyceride and 85 parts of water.
Performance testing
Comparative example: an aluminum profile product whose surface is treated by the prior art;
example (b): aluminum profile products surface-treated according to the processes provided in examples 1, 2 and 3 of the present invention;
the experimental method comprises the following steps:
1. respectively soaking the samples provided by the comparative example, the example 1 and the example 2 and the example 3 in hot water at the temperature of 50-60 ℃ for 48 hours; then, whether the paint film on the surface of each sample has blistering or shedding phenomenon is respectively observed.
2. The samples provided by the comparative example and the example 1, and the example 2 and the example 3 are respectively soaked in a sulfuric acid solution with the temperature of 25 +/-2 ℃ and the concentration of 5 percent; then, whether the paint film on the surface of each sample has blistering or shedding phenomenon is respectively observed.
3. The samples provided by the comparative example and the example 1, and the example 2 and the example 3 are respectively soaked in a sodium hydroxide solution with the temperature of 25 +/-2 ℃ and the concentration of 5 percent, and then whether the surface paint film of each sample has the phenomenon of foaming or falling off is respectively observed.
4. Determination of paint film hardness: the paint film thickness was measured on the comparative examples and the test pieces provided in example 1, example 2 and example 3 according to the national standard of GB 5237-2004.
5. And (3) wear test: the abrasion test is carried out on an HRS-2M reciprocating friction abrasion tester, and the friction mode is as follows: reciprocating type, the opposite grinding pair is a silicon carbide ceramic ball with the diameter of phi 5; and (5) observing the wear appearance.
Respectively carrying out performance detection on the aluminum profiles treated in the comparative example and the examples 1, 2 and 3; and the results of the tests obtained are reported in the following table:
from the relevant data in the table above, the corrosion resistance, wear resistance and quality of the aluminum profile treated by the process provided by the invention are superior to those of the aluminum profile treated by the prior art. Therefore, the thermoplastic elastomer tension band prepared by the invention has wider market prospect and is more suitable for popularization.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A surface treatment process for high-temperature environment-friendly alkali sand aluminum profiles is characterized by comprising the following steps: the method comprises the following steps:
s1, hanging the aluminum profile with the surface to be processed on a bent frame; placing the hung aluminum profile in a degreasing tank, and carrying out ultrasonic vibration treatment on the degreasing agent with the temperature of 45-60 ℃ in the degreasing tank for 5-10 min; then, hanging the aluminum profile out and dripping the aluminum profile, then transferring the aluminum profile into a water washing tank for ultrasonic washing for 2-3 times, wherein the ultrasonic washing time is 100-200 s each time, and obtaining a degreased aluminum profile;
s2, placing the aluminum profile processed in the step S1 in a pure water tank, and cleaning the aluminum profile at room temperature for 5-8 min; then placing the aluminum profile into a heating tank with a gas guide pipe arranged at the top, wherein the other end of the gas guide pipe is communicated with a gas storage tank, adding a proper amount of alkali liquor into the heating tank, raising the temperature of the alkali liquor in the tank to 90-105 ℃, and soaking the aluminum profile for 3-7 min in alkali;
s3, carrying out pure water washing twice at room temperature on the aluminum profile after alkali washing, wherein the washing time is 4-6 min each time; then placing the aluminum profile after washing in a neutralizing tank containing acid liquor, neutralizing the aluminum profile after washing with alkali at room temperature for 3-5 min, and quickly placing the aluminum profile into a clear water tank after the residual liquid is completely dripped on a lifting frame of the aluminum profile after treatment; washing at room temperature for 2-4 min to obtain a neutralized aluminum profile;
s4, placing the neutralized aluminum profile into a polishing tank containing polishing liquid, polishing for 2-3 min, and then placing the polished aluminum profile into a water washing tank to clean to obtain a polished aluminum profile;
s5, placing the polished aluminum profile into acid liquor at the temperature of 18-25 ℃ for anodic oxidation treatment for 25-35 min, and then washing the aluminum profile subjected to anodic oxidation treatment twice at room temperature for 3-5 min;
s6, placing the aluminum profile after oxidation treatment in a coloring groove, and starting electrifying and coloring after soaking for 1-2 min; after coloring is started, the coloring voltage is increased to 14-18V within 30s smoothly, and then the voltage is kept stable and unchanged until coloring is finished; after coloring, carrying out secondary acid washing on the aluminum profile;
s7, transferring the colored aluminum profile into a hole sealing pool, and sealing the hole of the aluminum profile by using a hole sealing agent in the pool to seal the porous membrane layer; wherein, the technological parameters of the hole sealing treatment are as follows: the temperature is 10-30 ℃, the time is 3-10 min, and the pH is 5.5-6.5; after hole sealing is finished, the bent frame is lifted and inclined, after hole sealing liquid is dripped, the aluminum profile is placed into a pure water tank at room temperature for pure water washing, and the time of pure water washing is 3-5 min; washing the aluminum profile with hot pure water for 4-5 min; then, carrying out air drying treatment on the aluminum profile after washing;
s8, unloading after the treatment of the procedures; and then packaging and warehousing the qualified aluminum profiles according to the regulations to obtain the high-resistance electrophoresis aluminum profiles.
2. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, wherein the preparation method of the degreasing agent used in the step S1 is as follows: accurately weighing 15-20 parts of sodium carbonate, 6-9 parts of sodium silicate, 5-10 parts of penetrant OEP-70 and 8-12 parts of OP emulsifier by weight parts, and then ultrasonically mixing the penetrant OEP-70 and the OP emulsifier with 200-250 parts of deionized water to obtain the degreasing agent.
3. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, characterized by comprising the following steps of: the alkali liquor used in the step S2 is 1.0-1.3 mol/L sodium hydroxide solution.
4. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, characterized by comprising the following steps of: the acid solution used in the step S3 is a sulfuric acid solution with the concentration of 1.2-1.5 mol/L.
5. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, characterized by comprising the following steps of: the polishing solution in the step S4 is prepared by mixing 1.7g/ml phosphoric acid and 1.84g/ml sulfuric acid according to the volume ratio of 3: 1.
6. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, characterized by comprising the following steps of: the acid solution used in the step S5 is a sulfuric acid solution with the concentration of 1.5-1.8 mol/L.
7. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, characterized by comprising the following steps of: in the step S5, the current density is 110-140A/m2。
8. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, characterized by comprising the following steps of: when the aluminum profile is subjected to acid washing twice in the step S6, the pH of the hydrochloric acid solution used in the first acid washing is 2.5 to 3.2, and the pH of the hydrochloric acid solution used in the second acid washing is 4.2 to 4.8.
9. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, characterized by comprising the following steps of: the temperature of the hot pure water used in the step S7 is 60-75 ℃.
10. The surface treatment process of the high-temperature environment-friendly alkali sand aluminum profile according to claim 1, characterized by comprising the following steps of: when hole sealing treatment is carried out on the aluminum profile in the step S7, the using amount of the hole sealing agent is 5-8 g/L; the composite material is prepared from the following raw materials in parts by weight: 14-17 parts of calcium (magnesium) acetate tetrahydrate, 0.5-1.2 parts of benzoic acid/sodium benzoate, 0.4-1.0 part of sodium gluconate, 0.6-1.0 part of isoamyl alcohol, 1.8-2.6 parts of fatty glyceride and 75-85 parts of water.
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Denomination of invention: A High Temperature Environmental Protection Alkali Sand Aluminum Profile Surface Treatment Process Effective date of registration: 20230714 Granted publication date: 20230407 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Quzhou Longyou sub branch Pledgor: ZHEJIANG CHUNXU ALUMINIUM INDUSTRY CO.,LTD. Registration number: Y2023980048502 |
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