CN112522709B - Flat plate shell polishing method - Google Patents
Flat plate shell polishing method Download PDFInfo
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- CN112522709B CN112522709B CN202011506092.2A CN202011506092A CN112522709B CN 112522709 B CN112522709 B CN 112522709B CN 202011506092 A CN202011506092 A CN 202011506092A CN 112522709 B CN112522709 B CN 112522709B
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/02—Light metals
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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
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
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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
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to the technical field of aluminum alloy, in particular to a flat plate shell polishing method which comprises the following steps: (1) Taking an aluminum alloy flat shell workpiece to be treated, degreasing the flat shell workpiece, and washing the flat shell workpiece with water after degreasing; (2) Placing the washed flat shell workpiece in absolute ethyl alcohol for washing; (3) And polishing the flat shell workpiece by using chemical polishing solution, pickling after polishing, and then washing with water. When the invention is used for processing the aluminum alloy flat shell workpiece, the invention has the advantages of high polishing brightness, smooth surface, less aluminum alloy loss and the like, can inhibit the generation of alkali fog and ammonia gas, and greatly reduces the pollution to the environment and the damage to the health of operators. The surface of the aluminum alloy flat shell can achieve a good mirror surface effect, is smooth and flat, has low surface roughness, and is beneficial to improving the yield and the quality of products; the method has simple operation, easy control and high production efficiency.
Description
Technical Field
The invention relates to the technical field of aluminum alloy, in particular to a flat plate shell polishing method.
Background
With the development of society and the progress of science and technology, aluminum alloy is increasingly well applied, and is widely applied to appearance structural members of electronic products such as smart phones, tablet computers, notebook computers, mobile power supplies and the like. The chemical polishing process commonly adopted by the existing aluminum alloy products adopts acidic polishing solution, usually contains nitric acid, and a large amount of nitrogen oxide gas, commonly called yellow smoke, is generated in the chemical polishing process. The nitrogen oxides seriously pollute the environment and influence the physical health of operators; on the other hand, the existing aluminum alloy is prone to surface unevenness, pockmark, low brightness and the like in the chemical polishing process, is limited in application range, cannot meet the requirements, and needs to be further improved.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the plate shell chemical polishing method, which has the advantages of high polishing brightness, smooth surface, less aluminum alloy loss and the like when used for treating the aluminum alloy plate shell, can inhibit the generation of alkali fog and ammonia gas, and greatly reduces the pollution to the environment and the damage to the health of operators. The surface of the aluminum alloy flat shell can achieve a good mirror surface effect, is smooth and flat, has low surface roughness, and is beneficial to improving the yield and the quality of products; the method has the advantages of simple operation, easy control, high production efficiency, stable product quality, reduced environmental pollution, and suitability for industrial mass production.
The purpose of the invention is realized by the following technical scheme: a flat plate shell polishing method comprises the following steps:
(1) Taking an aluminum alloy flat shell workpiece to be treated, degreasing the flat shell workpiece, and washing the flat shell workpiece with water after degreasing;
(2) Placing the washed flat shell workpiece in absolute ethyl alcohol for washing;
(3) And polishing the flat shell workpiece by using chemical polishing solution, pickling after polishing, and then washing with water to obtain the flat shell subjected to chemical polishing treatment.
Further, in the step (1), the flat shell workpiece is placed into an aqueous solution of a degreasing agent to be degreased by using ultrasonic waves.
Further, the degreasing agent comprises the following raw materials in parts by weight: 20-30 parts of polyoxyethylene fatty alcohol ether, 3-6 parts of sodium carboxymethylcellulose, 3-5 parts of ethylene diamine tetraacetic acid, 2-5 parts of sodium gluconate, 8-12 parts of triethanolamine, 4-7 parts of polyethylene glycol, 1-2 parts of polydimethylsiloxane, 3-6 parts of sodium silicate and 30-40 parts of deionized water.
According to the invention, by compounding the raw materials, the prepared degreasing agent has a good degreasing effect, the surface cleanliness of the aluminum alloy shell workpiece is improved, and the subsequent chemical polishing effect is improved. Wherein, the sodium carboxyethyl cellulose can generate anions in the washing process, so that the aluminum alloy surface and oil stains can carry negative charges, the oil stains have phase separation property in a water phase and have repellency with the surface of a solid-phase washed object, and the dirt can be prevented from being redeposited on the washed object; the sodium gluconate, the triethanolamine, the sodium silicate, the polyethylene glycol, the polydimethylsiloxane and other raw materials are matched to reduce the corrosion of the aqueous solution of the degreasing agent to the surface of the metal material, and the degreasing agent has the functions of adjusting the acidity-basicity of the degreasing agent and inhibiting bubbles, thereby improving the degreasing and cleaning effect.
Further, the preparation method of the degreasing agent comprises the following steps:
a1, adding triethanolamine, sodium silicate, sodium gluconate and deionized water into a reaction kettle according to weight, and uniformly stirring to obtain a mixed solution A1;
a2, adding polyoxyethylene fatty alcohol ether, polydimethylsiloxane and polyethylene glycol into the mixed solution A obtained in the step A1, and stirring until the polyoxyethylene fatty alcohol ether, the polydimethylsiloxane and the polyethylene glycol are dissolved to obtain a mixed solution A2;
and A3, adding sodium carboxyethyl cellulose and ethylene diamine tetraacetic acid into the mixed solution A2, stirring while adding, and uniformly stirring to obtain the degreasing agent.
The degreasing agent is prepared by the method, and the process parameter layer of the degreasing agent is controlled, so that the prepared degreasing agent is simple and easy to control in preparation method, stable in degreasing property, good in cleaning effect, small in harm to the environment and beneficial to industrial production.
Further, in the step (1), the ultrasonic degreasing temperature is 45-60 ℃, the treatment time is 4-8min, and the ultrasonic frequency is 50-80kHz. The concentration of the degreasing agent in the aqueous solution of the degreasing agent is 60-80g/L.
Further, in the step (2), the pretreatment time of the absolute ethyl alcohol is 4-10min.
Further, in the step (3), the chemical polishing solution comprises the following raw materials in parts by weight: 240-290 parts of sodium hydroxide, 110-140 parts of sodium nitrate, 14-20 parts of gelatin, 11-14 parts of potassium fluoride, 5-9g/L of polyethylene glycol, 4-8 parts of simethicone, 3-7 parts of 3-amino-2-hydroxypropionic acid, 3-6 parts of zinc sulfate, 3-6 parts of fatty alcohol ether sodium sulfate and 800-900 parts of deionized water.
The chemical polishing solution is prepared by compounding sodium hydroxide, sodium nitrate, gelatin and potassium fluoride and matching the compound with raw materials such as polyethylene glycol, dimethyl silicone oil, 3-amino-2-hydroxypropionic acid and the like. When the chemical polishing solution is used for polishing the chemical polishing solution, the chemical polishing solution has the advantages of high polishing brightness, smooth surface, less aluminum alloy loss and the like, can inhibit the generation of alkali fog and ammonia gas, greatly reduces the pollution to the environment, and reduces the damage to the health of operators. The surface of the aluminum alloy flat plate shell can achieve good mirror effect, is smooth and flat, and has low surface roughness. The sodium hydroxide, the sodium nitrate and the sodium fluoride are matched to play a role in corrosion leveling of microcosmic convex aluminum on the surface of an aluminum alloy workpiece and improve surface brightness and smoothness, and the polyethylene glycol, the dimethyl silicon oil, the 3-amino-2-hydroxypropionic acid, the zinc sulfate and the fatty alcohol ether sodium sulfate are matched to play a good role in corrosion delaying, play a good role in polishing and leveling the surface, prevent corrosion spots from being generated, further improve the polishing effect, effectively inhibit the generation of alkali fog and ammonia gas in the polishing process, reduce harm to the environment and human bodies, and achieve a good polishing effect by matching the raw materials.
Further, in the step (3), the flat shell workpiece is immersed into chemical polishing liquid, and chemical polishing is carried out by adopting ultrasonic waves, wherein the temperature of the polishing liquid is 40-55 ℃, and the polishing time is 10-20s. The ultrasonic frequency is 40-60kHz.
Further, in the step (3), sulfuric acid is adopted for acid washing, and the concentration of the sulfuric acid is 15-22wt%. According to the invention, sulfuric acid is adopted for acid cleaning, and the aluminum alloy flat shell workpiece polished by the chemical polishing solution is neutralized, so that the brightness of the aluminum alloy surface is improved, and the corrosion points of the surface are reduced.
Further, in the step (3), after acid washing, deionized water is adopted for ultrasonic cleaning, wherein the ultrasonic cleaning temperature is 35-45 ℃, the cleaning time is 60-150s, and the ultrasonic frequency is 60-100kHz.
According to the invention, the ultrasonic washing is carried out by adopting the ionized water, and the steps and the process parameters are controlled, so that the washing efficiency is improved, the washing effect is improved, and the problems of corrosion spots, floating, uneven surface and the like of the aluminum alloy workpiece are prevented.
The invention has the beneficial effects that: the method for polishing the flat shell has the advantages of high polishing brightness, smooth surface, less aluminum alloy loss and the like when an aluminum alloy flat shell workpiece is treated, can inhibit the generation of alkali fog and ammonia gas, and greatly reduces the pollution to the environment and the damage to the health of operators. The surface of the aluminum alloy flat plate shell can achieve a good mirror surface effect, is smooth and flat, has low surface roughness, and is beneficial to improving the yield and the quality of products; the method has the advantages of simple operation, easy control, high production efficiency, stable product quality, reduced environmental pollution, and suitability for industrial mass production.
Detailed Description
The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention.
Example 1
A flat plate shell polishing method comprises the following steps:
(1) Taking an aluminum alloy flat shell workpiece to be treated, degreasing the flat shell workpiece, and washing the flat shell workpiece after degreasing;
(2) Placing the washed flat shell workpiece in absolute ethyl alcohol for washing;
(3) And polishing the flat shell workpiece by using chemical polishing solution, pickling after polishing, and then washing with water to obtain the flat shell subjected to chemical polishing treatment.
Further, in the step (1), the flat shell workpiece is placed into a degreasing agent aqueous solution for degreasing by using ultrasonic waves.
Further, in the step (1), the degreasing agent comprises the following raw materials in parts by weight: 25 parts of polyoxyethylene fatty alcohol ether, 4 parts of sodium carboxymethylcellulose, 4 parts of ethylene diamine tetraacetic acid, 3 parts of sodium gluconate, 9 parts of triethanolamine, 6 parts of polyethylene glycol, 1.5 parts of polydimethylsiloxane, 4 parts of sodium silicate and 35 parts of deionized water.
Further, the preparation method of the degreasing agent comprises the following steps:
a1, adding triethanolamine, sodium silicate, sodium gluconate and deionized water into a reaction kettle according to the weight, and uniformly stirring to obtain a mixed solution A1;
a2, adding polyoxyethylene fatty alcohol ether, polydimethylsiloxane and polyethylene glycol into the mixed solution A obtained in the step A1, and stirring until the mixture is dissolved to obtain mixed solution A2;
and A3, adding sodium carboxyethyl cellulose and ethylene diamine tetraacetic acid into the mixed solution A2, stirring while adding, and uniformly stirring to obtain the degreasing agent.
Further, in the step (1), the ultrasonic degreasing temperature is 50 ℃, the treatment time is 5min, and the ultrasonic frequency is 60kHz. The concentration of the degreasing agent in the aqueous solution of the degreasing agent is 65g/L.
Further, in the step (2), the pretreatment time of the absolute ethyl alcohol is 6min.
Further, in the step (3), the chemical polishing solution comprises the following raw materials in parts by weight: 260 parts of sodium hydroxide, 130 parts of sodium nitrate, 16 parts of gelatin, 12 parts of potassium fluoride, 6g/L of polyethylene glycol, 6 parts of dimethyl silicone oil, 5 parts of 3-amino-2-hydroxypropionic acid, 4 parts of zinc sulfate, 4 parts of fatty alcohol ether sodium sulfate and 850 parts of deionized water.
Further, in the step (3), the flat shell workpiece is immersed in a chemical polishing solution, and chemical polishing is performed by using ultrasonic waves, wherein the temperature of the polishing solution is 45 ℃ and the polishing time is 15s. The ultrasonic frequency was 45kHz.
Further, in the step (3), sulfuric acid is used for pickling, and the concentration of the sulfuric acid is 18wt%.
Further, in the step (3), after acid washing, deionized water is used for ultrasonic cleaning, wherein the ultrasonic cleaning temperature is 40 ℃, the cleaning time is 120s, and the ultrasonic frequency is 80kHz.
Example 2
In this embodiment, a method for polishing a flat panel housing includes the following steps:
(1) Taking an aluminum alloy flat shell workpiece to be treated, degreasing the flat shell workpiece, and washing the flat shell workpiece with water after degreasing;
(2) Placing the washed flat shell workpiece in absolute ethyl alcohol for washing;
(3) And polishing the flat shell workpiece by using chemical polishing solution, pickling after polishing, and then washing with water to obtain the flat shell subjected to chemical polishing treatment.
Further, in the step (1), the flat shell workpiece is placed into an aqueous solution of a degreasing agent to be degreased by using ultrasonic waves.
Further, the degreasing agent comprises the following raw materials in parts by weight: 20 parts of polyoxyethylene fatty alcohol ether, 3 parts of sodium carboxymethylcellulose, 3 parts of ethylene diamine tetraacetic acid, 2 parts of sodium gluconate, 8 parts of triethanolamine, 4 parts of polyethylene glycol, 1 part of polydimethylsiloxane, 3 parts of sodium silicate and 30 parts of deionized water.
Further, the preparation method of the degreasing agent comprises the following steps:
a1, adding triethanolamine, sodium silicate, sodium gluconate and deionized water into a reaction kettle according to weight, and uniformly stirring to obtain a mixed solution A1;
a2, adding polyoxyethylene fatty alcohol ether, polydimethylsiloxane and polyethylene glycol into the mixed solution A obtained in the step A1, and stirring until the mixture is dissolved to obtain mixed solution A2;
and A3, adding sodium carboxyethyl cellulose and ethylene diamine tetraacetic acid into the mixed solution A2, stirring while adding, and uniformly stirring to obtain the degreasing agent.
Further, in the step (1), the ultrasonic degreasing temperature is 45 ℃, the treatment time is 8min, and the ultrasonic frequency is 50kHz. The concentration of the degreasing agent in the aqueous solution of the degreasing agent is 60g/L.
Further, in the step (2), the pretreatment time of the absolute ethyl alcohol is 4min.
Further, in the step (3), the chemical polishing solution comprises the following raw materials in parts by weight: 240 parts of sodium hydroxide, 110 parts of sodium nitrate, 14 parts of gelatin, 11 parts of potassium fluoride, 5g/L of polyethylene glycol, 4 parts of simethicone, 3 parts of 3-amino-2-hydroxypropionic acid, 3 parts of zinc sulfate, 3 parts of fatty alcohol ether sodium sulfate and 800 parts of deionized water.
Further, in the step (3), the flat shell workpiece is immersed in a chemical polishing solution, and chemical polishing is performed by using ultrasonic waves, wherein the temperature of the polishing solution is 45 ℃ and the polishing time is 20s. The ultrasonic frequency was 60kHz.
Further, in the step (3), sulfuric acid is used for pickling, and the concentration of the sulfuric acid is 15wt%.
Further, in the step (3), after acid washing, deionized water is adopted for ultrasonic cleaning, wherein the ultrasonic cleaning temperature is 35 ℃, the cleaning time is 150s, and the ultrasonic frequency is 60kHz.
Example 3
A flat plate shell polishing method comprises the following steps:
(1) Taking an aluminum alloy flat shell workpiece to be treated, degreasing the flat shell workpiece, and washing the flat shell workpiece after degreasing;
(2) Placing the washed flat shell workpiece in absolute ethyl alcohol for washing;
(3) And polishing the flat shell workpiece by using chemical polishing solution, pickling after polishing, and then washing to obtain the flat shell subjected to chemical polishing treatment.
Further, in the step (1), the flat shell workpiece is placed into an aqueous solution of a degreasing agent to be degreased by using ultrasonic waves.
Further, the degreasing agent comprises the following raw materials in parts by weight: 30 parts of polyoxyethylene fatty alcohol ether, 6 parts of sodium carboxymethylcellulose, 5 parts of ethylene diamine tetraacetic acid, 5 parts of sodium gluconate, 12 parts of triethanolamine, 7 parts of polyethylene glycol, 2 parts of polydimethylsiloxane, 6 parts of sodium silicate and 40 parts of deionized water.
Further, the preparation method of the degreasing agent comprises the following steps:
a1, adding triethanolamine, sodium silicate, sodium gluconate and deionized water into a reaction kettle according to the weight, and uniformly stirring to obtain a mixed solution A1;
a2, adding polyoxyethylene fatty alcohol ether, polydimethylsiloxane and polyethylene glycol into the mixed solution A obtained in the step A1, and stirring until the polyoxyethylene fatty alcohol ether, the polydimethylsiloxane and the polyethylene glycol are dissolved to obtain a mixed solution A2;
and A3, adding sodium carboxyethyl cellulose and ethylene diamine tetraacetic acid into the mixed solution A2, stirring while adding, and uniformly stirring to obtain the degreasing agent.
Further, in the step (1), the ultrasonic degreasing temperature is 60 ℃, the treatment time is 4min, and the ultrasonic frequency is 80kHz. The concentration of the degreasing agent in the aqueous solution of the degreasing agent is 80g/L.
Further, in the step (2), the pretreatment time of the absolute ethyl alcohol is 10min.
Further, in the step (3), the chemical polishing solution comprises the following raw materials in parts by weight: 290 parts of sodium hydroxide, 140 parts of sodium nitrate, 20 parts of gelatin, 14 parts of potassium fluoride, 9g/L of polyethylene glycol, 8 parts of simethicone, 7 parts of 3-amino-2-hydroxypropionic acid, 6 parts of zinc sulfate, 6 parts of fatty alcohol ether sodium sulfate and 900 parts of deionized water.
Further, in the step (3), the flat shell workpiece is immersed in a chemical polishing solution, and chemical polishing is performed by using ultrasonic waves, wherein the temperature of the polishing solution is 55 ℃ and the polishing time is 10s. The ultrasonic frequency was 60kHz.
Further, in the step (3), sulfuric acid is used for pickling, and the concentration of the sulfuric acid is 22wt%.
Further, in the step (3), after acid washing, deionized water is used for ultrasonic cleaning, wherein the ultrasonic cleaning temperature is 45 ℃, the cleaning time is 60s, and the ultrasonic frequency is 100kHz.
Example 4
In this embodiment, a method for polishing a flat panel housing includes the following steps:
(1) Taking an aluminum alloy flat shell workpiece to be treated, degreasing the flat shell workpiece, and washing the flat shell workpiece with water after degreasing;
(2) Placing the washed flat shell workpiece in absolute ethyl alcohol for washing;
(3) And polishing the flat shell workpiece by using chemical polishing solution, pickling after polishing, and then washing to obtain the flat shell subjected to chemical polishing treatment.
Further, in the step (1), the flat shell workpiece is placed into a degreasing agent aqueous solution for degreasing by using ultrasonic waves.
Further, the degreasing agent comprises the following raw materials in parts by weight: 24 parts of polyoxyethylene fatty alcohol ether, 4 parts of sodium carboxyethyl cellulose, 4 parts of ethylene diamine tetraacetic acid, 3 parts of sodium gluconate, 10 parts of triethanolamine, 5 parts of polyethylene glycol, 1.5 parts of polydimethylsiloxane, 4 parts of sodium silicate and 36 parts of deionized water.
Further, the preparation method of the degreasing agent comprises the following steps:
a1, adding triethanolamine, sodium silicate, sodium gluconate and deionized water into a reaction kettle according to the weight, and uniformly stirring to obtain a mixed solution A1;
a2, adding polyoxyethylene fatty alcohol ether, polydimethylsiloxane and polyethylene glycol into the mixed solution A obtained in the step A1, and stirring until the polyoxyethylene fatty alcohol ether, the polydimethylsiloxane and the polyethylene glycol are dissolved to obtain a mixed solution A2;
and A3, adding sodium carboxyethyl cellulose and ethylene diamine tetraacetic acid into the mixed solution A2, stirring while adding, and uniformly stirring to obtain the degreasing agent.
Further, in the step (3), the chemical polishing solution comprises the following raw materials in parts by weight: 260 parts of sodium hydroxide, 120 parts of sodium nitrate, 16 parts of gelatin, 12 parts of potassium fluoride, 7g/L of polyethylene glycol, 5 parts of simethicone, 4 parts of 3-amino-2-hydroxypropionic acid, 4 parts of zinc sulfate, 4 parts of fatty alcohol ether sodium sulfate and 850 parts of deionized water.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Comparative example 1
The comparative example differs from example 1 in that: in the step (3), the chemical polishing solution comprises the following raw materials in parts by weight: 260 parts of sodium hydroxide, 130 parts of sodium nitrate, 16 parts of sodium silicate, 12 parts of potassium fluoride, 4 parts of zinc sulfate, 4 parts of fatty alcohol ether sodium sulfate and 850 parts of deionized water.
Comparative example 2
This comparative example differs from example 1 in that: in the step (1), the degreasing agent comprises the following raw materials in parts by weight: 25 parts of polyoxyethylene fatty alcohol ether, 4 parts of ethylene diamine tetraacetic acid, 3 parts of sodium gluconate, 9 parts of triethanolamine, 1.5 parts of polydimethylsiloxane and 35 parts of deionized water.
The degreasing effects of the degreasing agents prepared in examples 1 to 4 and comparative example 2 were tested, a 6061 aluminum alloy workpiece was selected and cut into 20 × 10mm pieces as sample pieces, and the degreasing agents prepared in the above examples 1 to 4 and comparative example 2 were subjected to a degreasing test by the following test methods: after recording the weight w1 of the sample piece, the sample piece was immersed in a lubricating oil to suspend the oil, and after standing for 3 minutes, the sample piece was weighedHanging the weight w2 of the oil test sample strip, and hanging the oil quantity through w2-w 1; heating a degreasing agent to 55 ℃, immersing the degreased sample piece after being oiled into the degreasing agent in the embodiment for immersing for 1min, 3min and 5min respectively, recording the weights w3, w4 and w5 of the test sample piece after draining the degreasing agent, calculating the degreasing rate of the test sample piece after being immersed for 1min by calculating (w 2-w 3)/(w 2-w 1), and calculating the degreasing test result of the test sample piece after being immersed for 3min by calculating (w 2-w 4)/(w 2-w 1) as shown in the following table:
| item | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 |
| Defatting rate at 1min | 68% | 63% | 64% | 66% | 57% |
| Defatting rate at 3min | 95% | 93% | 94% | 94% | 87% |
| Defatting rate at 5min | 99% | 98% | 98% | 99% | 92% |
As can be seen from the above table, the degreasing agents of embodiments 1 to 4 of the present invention have a good degreasing effect on grease of aluminum alloy workpieces, the degreasing rate at 5min can be as high as 98% or more, no damage is caused to the aluminum alloy workpieces, and the degreasing agents are environment-friendly, economical and suitable for mass production.
A 6061 aluminum alloy flat shell workpiece was chemically polished according to examples 1-4 and comparative example 2, with the following weight loss aluminum alloy after polishing and the following surface roughness before and after polishing:
the weight loss rate after polishing refers to the weight loss rate of the aluminum alloy workpiece before being placed in the chemical polishing solution and after being placed in the chemical polishing solution for chemical polishing. The aluminum alloy flat shell workpieces of examples 1-4 have uniform surface texture, good mirror effect, smoothness, flatness, uniform texture, no surface defects such as cracks, corrosion and the like, and surface roughness Ra is less than or equal to 0.1 mu m. The surface roughness Ra of comparative example 1 was 0.24 μm. The examples 1-4 were chemically polished to a higher brightness than comparative example 2.
The method for polishing the flat shell has the advantages of high polishing brightness, smooth surface, less aluminum alloy loss and the like when the aluminum alloy flat shell workpiece is treated, can inhibit the generation of alkali mist and ammonia gas, and greatly reduces the pollution to the environment and the damage to the health of operators. The surface of the aluminum alloy flat shell can reach the standard, the surface roughness is low, and the product yield and the product quality are favorably improved; the method has the advantages of simple operation, easy control, high production efficiency, stable product quality, reduced environmental pollution, and suitability for industrial mass production.
The above-described embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.
Claims (8)
1. A method for polishing a flat plate shell is characterized by comprising the following steps: the method comprises the following steps: (1) Taking an aluminum alloy flat shell workpiece to be treated, degreasing the flat shell workpiece, and washing the flat shell workpiece with water after degreasing; (2) Placing the washed flat shell workpiece in absolute ethyl alcohol for washing; (3) Polishing the flat shell workpiece by using chemical polishing solution, pickling after polishing, and then washing with water to obtain a flat shell subjected to chemical polishing treatment;
in the step (3), the chemical polishing solution comprises the following raw materials in parts by weight: 240-290 parts of sodium hydroxide, 110-140 parts of sodium nitrate, 14-20 parts of gelatin, 11-14 parts of potassium fluoride, 5-9g/L of polyethylene glycol, 4-8 parts of simethicone, 3-7 parts of 3-amino-2-hydroxypropionic acid, 3-6 parts of zinc sulfate, 3-6 parts of fatty alcohol ether sodium sulfate and 800-900 parts of deionized water.
2. The method of claim 1, wherein the step of polishing the surface of the flat panel comprises the steps of: in the step (1), the flat shell workpiece is placed in a degreasing agent to be degreased by ultrasonic waves.
3. The method of claim 1, further comprising: in the step (1), the ultrasonic degreasing temperature is 45-60 ℃, the treatment time is 4-8min, and the ultrasonic frequency is 50-80kHz.
4. The method of claim 1, further comprising: in the step (2), the pretreatment time of the absolute ethyl alcohol is 4-10min.
5. The method of claim 1, wherein the step of polishing the surface of the flat panel comprises the steps of: in the step (3), the flat shell workpiece is immersed in chemical polishing liquid, and chemical polishing is carried out by adopting ultrasonic waves, wherein the temperature of the polishing liquid is 40-55 ℃, and the polishing time is 10-20s.
6. The plate housing polishing method according to claim 5, wherein: in the step (3), the ultrasonic frequency is 40-60kHz.
7. The method of claim 1, wherein the step of polishing the surface of the flat panel comprises the steps of: in the step (3), sulfuric acid is adopted for acid washing, and the concentration of the sulfuric acid is 15-22wt%.
8. The method of claim 1, further comprising: in the step (3), after acid washing, deionized water is adopted for ultrasonic cleaning, the ultrasonic cleaning temperature is 35-45 ℃, the cleaning time is 60-150s, and the ultrasonic frequency is 60-100kHz.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS55113883A (en) * | 1979-02-26 | 1980-09-02 | Yoshimitsu Takahashi | Al same alloy chemical polishing composition of alkaline bath |
| CN106702389B (en) * | 2015-03-30 | 2019-01-25 | 江苏理工学院 | 7075 aluminum alloy alkaline chemical polishing method and alkaline chemical polishing solution adopted by same |
| CN105350000B (en) * | 2015-12-02 | 2018-06-22 | 林小芬 | A kind of environment-friendly type aluminum alloy material polishing solution and preparation method thereof |
| CN107502892B (en) * | 2017-09-25 | 2020-01-07 | 南昌航空大学 | Alkaline chemical milling and polishing method for aluminum alloy |
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Effective date of registration: 20230920 Address after: 516000 south of Guangzhou Shantou highway, niutianling village group, Xinjie village committee, Luoyang Town, BOLUO County, Huizhou City, Guangdong Province Patentee after: Guangdong Dongming New Material Technology Co.,Ltd. Address before: 523000 building 32, 126 guangma Avenue, Machong Town, Dongguan City, Guangdong Province Patentee before: Dongguan new Dongming Technology Co.,Ltd. |