CN114622212A - Aluminum profile surface treatment method - Google Patents
Aluminum profile surface treatment method Download PDFInfo
- Publication number
- CN114622212A CN114622212A CN202210194161.3A CN202210194161A CN114622212A CN 114622212 A CN114622212 A CN 114622212A CN 202210194161 A CN202210194161 A CN 202210194161A CN 114622212 A CN114622212 A CN 114622212A
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- CN
- China
- Prior art keywords
- aluminum profile
- degreasing
- surface treatment
- sodium
- treatment method
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/22—Light metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/16—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions using inhibitors
Abstract
The invention provides a method for treating the surface of an aluminum profile, which comprises the steps of spraying the aluminum profile with clear water at normal temperature, placing the sprayed aluminum profile into a degreasing tank, adding a degreasing agent, and soaking for 2-5 min under the action of ultrasonic waves. The degreasing agent has a more remarkable degreasing effect on degreasing treatment of the surface of the aluminum profile by optimizing the components and the content of the components, and the prepared degreasing agent can play an excellent degreasing role even when used at normal temperature, so that the degreasing agent is beneficial to reducing the treatment cost of the surface treatment of the aluminum profile and the treatment cost of the treated waste liquid; the degreasing agent has excellent stability in the using process, and can obtain excellent treatment effect under the condition of less addition amount. In addition, the aluminum profile surface treatment method is simple in steps and strong in operability, and can effectively promote the degreasing effect of the aluminum profile surface under the cooperation of the ultrasonic action.
Description
Technical Field
The invention relates to the field of aluminum alloy surface treatment, in particular to a method for aluminum profile surface treatment.
Background
Aluminum profiles have been widely used in various industries, particularly in the fields of aerospace, rail transit and new energy automobiles with high requirements for weight reduction due to their high specific strength, specific modulus, fracture toughness and corrosion resistance. The surface treatment is generally needed before the aluminum profile is sprayed, and then the coating is sprayed on the surface of the aluminum profile so as to achieve the purposes of improving the oxidation resistance, the corrosion resistance, the aesthetic degree and the like of the aluminum profile. However, the aluminum profile surface treatment in the prior art needs high-temperature treatment, which results in high energy consumption and high treatment cost for enterprises, and the used degreasing agent is unstable in the use process, and the surface degreasing effect is not ideal. In addition, the addition of an excessive amount of the treating agent to the treated waste liquid also increases the treatment cost of the treating liquid.
In summary, the above problems still remain to be solved in the field of surface treatment of aluminum profiles.
Disclosure of Invention
Based on the above, in order to solve the problems of high energy consumption, unstable degreasing agent and unsatisfactory treatment effect in the surface treatment of the aluminum profile in the prior art, the invention provides a method for surface treatment of the aluminum profile, and the specific technical scheme is as follows:
a method for surface treatment of aluminum profiles comprises the following steps:
spraying the aluminum profile to be treated with clear water at normal temperature;
placing the sprayed aluminum profile in a degreasing tank, adding a degreasing agent for soaking for 2-5 min, and then soaking and cleaning with clear water for 1-3 min;
controlling the free alkali point in the bath solution to be 10-20, adding 3-4 kg of degreasing agent to each ton of bath solution when 1 free alkali point is consumed, and detecting the bath solution once every 6 hours;
the degreasing agent comprises 18-20% of alkali, 3-6% of a composite corrosion inhibitor, 4-7% of a composite complexing agent and 3-5% of a composite surfactant according to mass percentage, and the composite surfactant comprises triethanolamine oleate, nonylphenol polyoxyethylene ether, isopropanol, lauryl alcohol amide, sodium carboxymethylcellulose and sodium methylene dinaphthalene sulfonate in a ratio of 8-10:6-8:5-6:5-6:5-6: 3-4.
Further, the alkali is one or a mixture of two of sodium hydroxide and potassium hydroxide.
Further, the composite corrosion inhibitor is composed of sodium carbonate, sodium phosphate, sodium silicate and silica sol.
Further, the mass ratio of the sodium carbonate to the sodium phosphate to the sodium silicate to the silica sol is 2-3:1-2:0.2-0.3: 0.1-0.2.
Further, the composite complexing agent consists of sodium gluconate, sorbitol and triethanolamine.
Further, the mass ratio of the sodium gluconate to the sorbitol to the triethanolamine is 3-4:1-2: 0.8-1.
Further, the degreasing agent also comprises the following components in percentage by mass: 4% -7% of sodium alkyl phenol ether sulfosuccinate and 7% -9% of calcium formate.
Further, the preparation method of the degreasing agent comprises the following steps:
adding water into a reaction kettle, then adding alkali, a corrosion inhibitor, a composite complexing agent and a composite surfactant, starting the reaction kettle to stir for 25-30 min to obtain a mixture A;
adding alkylphenol ether sulfosuccinate sodium salt into the mixture A, adjusting the temperature to 30-45 ℃, and continuously stirring for 15-30 min to obtain a mixture B;
and adding calcium formate into the mixture B, stirring for 5-10 min under the condition of keeping the temperature at 30-45 ℃, then naturally cooling to room temperature, and continuously stirring for 10-15 min under the condition of room temperature to obtain the degreasing agent.
Further, an ultrasonic action is set in the degreasing tank.
Further, the conditions of the ultrasonication are: the frequency is 40kHz-50kHz, the power is 50W-60W, and the ultrasonic action is interrupted for 2s every 4 s.
In the scheme, the degreasing agent has a more remarkable degreasing effect on degreasing treatment of the surface of the aluminum profile by optimizing the components and the content of the components, and the prepared degreasing agent can play an excellent degreasing role even when used at normal temperature, so that the surface treatment of the aluminum profile and the treatment cost of the treated waste liquid are reduced; the degreasing agent has excellent stability in the using process, and can obtain excellent treatment effect under the condition of less adding amount. In addition, the aluminum profile surface treatment method is simple in steps and strong in operability, and can effectively promote the degreasing effect of the aluminum profile surface under the cooperation of the ultrasonic action.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The method for processing the surface of the aluminum profile in one embodiment of the invention comprises the following steps:
spraying the aluminum profile to be treated with clear water at normal temperature;
placing the sprayed aluminum profile in a degreasing tank, adding a degreasing agent for soaking for 2-5 min, and then soaking and cleaning with clear water for 1-3 min;
controlling the free alkali point in the bath solution to be 10-20, adding 3-4 kg of degreasing agent to each ton of bath solution when 1 free alkali point is consumed, and detecting the bath solution once every 6 h;
the degreasing agent comprises, by mass, 18% -20% of alkali, 3% -6% of a compound corrosion inhibitor, 4% -7% of a compound complexing agent and 3% -5% of a compound surfactant, wherein the compound surfactant comprises triethanolamine oleate, nonylphenol polyoxyethylene ether, isopropanol, lauryl alcohol amide, sodium carboxymethylcellulose and sodium methylene dinaphthalene sulfonate in a ratio of 8-10:6-8:5-6:5-6:5-6: 3-4.
In one embodiment, the alkali is one or a mixture of two of sodium hydroxide and potassium hydroxide.
In one embodiment, the composite corrosion inhibitor is composed of sodium carbonate, sodium phosphate, sodium silicate and silica sol.
In one embodiment, the mass ratio of the sodium carbonate, the sodium phosphate, the sodium silicate and the silica sol is 2-3:1-2:0.2-0.3: 0.1-0.2.
In one embodiment, the complex complexing agent is composed of sodium gluconate, sorbitol and triethanolamine.
In one embodiment, the mass ratio of the sodium gluconate to the sorbitol to the triethanolamine is 3-4:1-2: 0.8-1.
In one embodiment, the degreasing agent further comprises the following components in percentage by mass: 4% -7% of sodium alkyl phenol ether sulfosuccinate and 7% -9% of calcium formate.
In one embodiment, the preparation method of the degreasing agent comprises the following steps:
adding water into a reaction kettle, then adding alkali, a corrosion inhibitor, a composite complexing agent and a composite surfactant, starting the reaction kettle to stir for 25-30 min to obtain a mixture A;
adding alkylphenol ether sulfosuccinate sodium salt into the mixture A, adjusting the temperature to 30-45 ℃, and continuously stirring for 15-30 min to obtain a mixture B;
and adding calcium formate into the mixture B, stirring for 5-10 min under the condition of keeping the temperature at 30-45 ℃, then naturally cooling to room temperature, and continuously stirring for 10-15 min under the condition of room temperature to obtain the degreasing agent.
In one embodiment, the degreasing bath is provided with ultrasonication.
In one embodiment, the conditions of the ultrasonication are: the frequency is 40kHz-50kHz, the power is 50W-60W, and the ultrasonic action is interrupted for 2s every 4 s.
In the scheme, the components and the content of the components of the degreasing agent are optimized, so that the degreasing agent has a more remarkable degreasing effect on degreasing treatment of the surface of the aluminum profile, and the prepared degreasing agent can play an excellent degreasing role even when used at normal temperature, and is beneficial to reducing the treatment cost of the surface treatment of the aluminum profile and the treatment cost of the treated waste liquid; the degreasing agent has excellent stability in the using process, and can obtain excellent treatment effect under the condition of less adding amount. In addition, the aluminum profile surface treatment method is simple in steps and strong in operability, and can effectively promote the degreasing effect of the aluminum profile surface under the cooperation of the ultrasonic action.
Embodiments of the present invention will be described in detail below with reference to specific examples.
Examples 1 to 3:
the ingredients and ingredient contents of the degreasing agents used in examples 1 to 3 are shown in Table 1;
embodiment 1-3 a method for surface treatment of aluminum profiles, comprising the steps of:
adding water into a reaction kettle, then adding sodium hydroxide, a corrosion inhibitor, a complex complexing agent and a complex surfactant, starting the reaction kettle to stir for 25-30 min, then adding alkylphenol ether sulfosuccinate sodium salt, adjusting the temperature to 30-45 ℃, continuing to stir for 15-30 min, continuing to add calcium formate, keeping at the temperature of 30-45 ℃, stirring for 5-10 min, naturally cooling to room temperature, and continuing to stir for 10-15 min at the room temperature to obtain a degreasing agent for later use;
spraying the aluminum profile to be treated with clear water at normal temperature;
placing the sprayed aluminum profile into a degreasing tank, adding a degreasing agent for soaking for 2-5 min, setting ultrasonic action with frequency of 40kHz-50kHz and power of 50W-60W in the soaking process, wherein the ultrasonic action is interrupted for 2s every 4s, the free alkali point in the tank liquid is controlled at 10-20, 3kg-4kg of the degreasing agent is added to each ton of the tank liquid every 1 free alkali point is consumed, the tank liquid is detected every 6h, and then soaking and cleaning are carried out for 1-3 min by using clear water,
comparative examples 1 to 4:
comparative examples 1 to 4 differ from example 3 only in the composition and the content of the components of the degreasing agent, as shown in table 1.
Comparative example 5:
the only difference from example 3 is that no ultrasonication was applied, and the rest is the same as example 3.
Table 1:
the degreasing tests of the aluminum profiles were carried out for examples 1 to 3 and comparative examples 1 to 5, with reference to national standard JB/T4323.2-1999, the results of which are shown in Table 2 below.
Table 2:
the data analysis of table 1 shows that the degreasing agent in the present application has a significant degreasing effect at normal temperature after being optimized, and can reduce the treatment cost of enterprises; from the comparison between example 3 and comparative examples 1-4, it can be seen that the components and the content of the components in the degreasing agent affect the final degreasing effect, and the degreasing agent in the present application is inventive as a complete solution. In addition, compared with the comparative example 5, the example 3 still has more excellent degreasing effect, and the ultrasonic effect is set in the treatment method of the application, so that the degreasing effect and the degreasing efficiency are improved.
In addition, in order to verify the influence of temperature on the degreasing agent, the present application further sets several groups of degreasing agents in different temperature conditions, and the degreasing effects of the degreasing agent in example 3 and the degreasing agents in comparative examples 1 to 4 are tested, as shown in table 3.
Table 3:
the data analysis in table 3 shows that the degreasing effect is affected by the temperature of the surface treatment of the aluminum profile, but the degreasing agent in the embodiment 3 of the present application can still ensure the excellent degreasing effect at different temperatures, so that the degreasing agent has a wider application space, and the degreasing effect changes to different degrees due to the temperature change in the comparative examples 1 to 4, and is inferior to the degreasing effect in the embodiment 3. In addition, the change of the components also affects the corrosion uniformity and the smoothness of the surface of the aluminum profile, and the treatment method in example 3 can not only obtain the aluminum profile with uniform corrosion, but also obtain the aluminum profile with smooth surface and clear natural color of the aluminum matrix.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The method for surface treatment of the aluminum profile is characterized by comprising the following steps:
spraying the aluminum profile to be treated with clear water at normal temperature;
placing the sprayed aluminum profile in a degreasing tank, adding a degreasing agent for soaking for 2-5 min, and then soaking and cleaning with clear water for 1-3 min;
controlling the free alkali point in the bath solution to be 10-20, adding 3-4 kg of degreasing agent to each ton of bath solution when 1 free alkali point is consumed, and detecting the bath solution once every 6 hours;
the degreasing agent comprises 18-20% of alkali, 3-6% of a composite corrosion inhibitor, 4-7% of a composite complexing agent and 3-5% of a composite surfactant according to mass percentage, and the composite surfactant comprises triethanolamine oleate, nonylphenol polyoxyethylene ether, isopropanol, lauryl alcohol amide, sodium carboxymethylcellulose and sodium methylene dinaphthalene sulfonate in a ratio of 8-10:6-8:5-6:5-6:5-6: 3-4.
2. The aluminum profile surface treatment method according to claim 1, wherein the alkali is one or a mixture of two of sodium hydroxide and potassium hydroxide.
3. The aluminum profile surface treatment method according to claim 1, wherein the composite corrosion inhibitor is composed of sodium carbonate, sodium phosphate, sodium silicate and silica sol.
4. The aluminum profile surface treatment method according to claim 3, wherein the mass ratio of the sodium carbonate, the sodium phosphate, the sodium silicate and the silica sol is 2-3:1-2:0.2-0.3: 0.1-0.2.
5. The aluminum profile surface treatment method according to claim 1, wherein the complex complexing agent is composed of sodium gluconate, sorbitol and triethanolamine.
6. The aluminum profile surface treatment method according to claim 5, wherein the mass ratio of the sodium gluconate to the sorbitol to the triethanolamine is 3-4:1-2: 0.8-1.
7. The aluminum profile surface treatment method according to claim 1, wherein the degreasing agent further comprises the following components in percentage by mass: 4% -7% of sodium alkyl phenol ether sulfosuccinate and 7% -9% of calcium formate.
8. The aluminum profile surface treatment method according to claim 7, wherein the degreasing agent is prepared by the following steps:
adding water into a reaction kettle, then adding alkali, a corrosion inhibitor, a composite complexing agent and a composite surfactant, starting the reaction kettle to stir for 25-30 min to obtain a mixture A;
adding alkylphenol ether sulfosuccinate sodium salt into the mixture A, adjusting the temperature to 30-45 ℃, and continuously stirring for 15-30 min to obtain a mixture B;
and adding calcium formate into the mixture B, stirring for 5-10 min under the condition of keeping the temperature at 30-45 ℃, then naturally cooling to room temperature, and continuously stirring for 10-15 min under the condition of room temperature to obtain the degreasing agent.
9. The aluminum profile surface treatment method according to claim 1, wherein an ultrasonic action is provided in the degreasing tank.
10. The aluminum profile surface treatment method according to claim 9, characterized in that the conditions of the ultrasonic action are as follows: the frequency is 40kHz-50kHz, the power is 50W-60W, and the ultrasonic action is interrupted for 2s every 4 s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210194161.3A CN114622212A (en) | 2022-03-01 | 2022-03-01 | Aluminum profile surface treatment method |
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| CN202210194161.3A CN114622212A (en) | 2022-03-01 | 2022-03-01 | Aluminum profile surface treatment method |
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| CN202210194161.3A Pending CN114622212A (en) | 2022-03-01 | 2022-03-01 | Aluminum profile surface treatment method |
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Citations (7)
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| US9133418B1 (en) * | 2014-04-07 | 2015-09-15 | Ecolab Usa Inc. | Non-silicated high alkaline cleaner with aluminum protection |
| CN106609379A (en) * | 2015-10-27 | 2017-05-03 | 重庆市巴南区龙亚机械厂 | Degreasant for machining metal product |
| CN107130253A (en) * | 2017-06-28 | 2017-09-05 | 华杰 | A kind of aluminum alloy cleaning agent |
| CN107254367A (en) * | 2017-04-27 | 2017-10-17 | 中国人民解放军空军工程大学 | Aircraft skin external surface cleaning agent |
| CN108660463A (en) * | 2018-06-29 | 2018-10-16 | 湖州织里宝丰铝业有限公司 | Alkaline defatting agent for aluminium alloy extrusions |
| CN110453232A (en) * | 2019-08-28 | 2019-11-15 | 安徽未来表面技术有限公司 | A kind of phosphorus-free normal-temperature composite metal surface degreasing agent |
| CN210560838U (en) * | 2019-08-22 | 2020-05-19 | 北京正和顺汽车部件有限公司 | Degreasing circulating water recycling system for electrophoretic coating |
-
2022
- 2022-03-01 CN CN202210194161.3A patent/CN114622212A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9133418B1 (en) * | 2014-04-07 | 2015-09-15 | Ecolab Usa Inc. | Non-silicated high alkaline cleaner with aluminum protection |
| CN106609379A (en) * | 2015-10-27 | 2017-05-03 | 重庆市巴南区龙亚机械厂 | Degreasant for machining metal product |
| CN107254367A (en) * | 2017-04-27 | 2017-10-17 | 中国人民解放军空军工程大学 | Aircraft skin external surface cleaning agent |
| CN107130253A (en) * | 2017-06-28 | 2017-09-05 | 华杰 | A kind of aluminum alloy cleaning agent |
| CN108660463A (en) * | 2018-06-29 | 2018-10-16 | 湖州织里宝丰铝业有限公司 | Alkaline defatting agent for aluminium alloy extrusions |
| CN210560838U (en) * | 2019-08-22 | 2020-05-19 | 北京正和顺汽车部件有限公司 | Degreasing circulating water recycling system for electrophoretic coating |
| CN110453232A (en) * | 2019-08-28 | 2019-11-15 | 安徽未来表面技术有限公司 | A kind of phosphorus-free normal-temperature composite metal surface degreasing agent |
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