CN108977817B - Deplating liquid, preparation method of deplating liquid and deplating process - Google Patents
Deplating liquid, preparation method of deplating liquid and deplating process Download PDFInfo
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- CN108977817B CN108977817B CN201811068470.6A CN201811068470A CN108977817B CN 108977817 B CN108977817 B CN 108977817B CN 201811068470 A CN201811068470 A CN 201811068470A CN 108977817 B CN108977817 B CN 108977817B
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- deplating
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- benzotriazole
- diethylene glycol
- sodium metasilicate
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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
- C23G1/16—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions using inhibitors
- C23G1/18—Organic 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Chemically Coating (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a deplating solution which comprises the following components in percentage by mass: 2-10% of tetramethylammonium hydroxide, 1-5% of benzotriazole, 1-10% of sodium metasilicate pentahydrate, 5-30% of diethylene glycol monomethyl ether, 0.5-2% of alkyl glycoside and the balance of pure water. The deplating solution provided by the invention is a weakly alkaline deplating solution, is environment-friendly and low in toxicity, has small smell and small volatility, can be applied to a sprayed aluminum fixture, can effectively remove sprayed protective oil, has no residue on the surface, has the oil removal qualification rate of over 99 percent, reduces the spraying reject ratio, and prolongs the service life of the fixture. The invention also discloses a preparation method of the deplating liquid and a deplating process adopting the deplating liquid, wherein the preparation method and the deplating process have simple steps, and process parameters are easy to control and easy to realize industrial production.
Description
Technical Field
The invention relates to the technical field of deplating, in particular to a deplating liquid, a preparation method of the deplating liquid and a deplating process.
Background
In the processing technology of the mobile phone glass and the ceramic rear cover, protective oil is used in the spraying technology, and an aluminum clamp jig is used in the spraying technology, so that a thick layer of sprayed protective oil can remain on the surface of the sprayed aluminum clamp jig, and the main components of the protective oil are epoxy acrylic resin and epoxy resin modified resin. The stripping solution sold in the market at present mainly has the following defects: (1) the alkaline deplating liquid effect can react with the aluminum material chemically, so that the thickness and the flatness of the fixture are damaged, and the aluminum plate can completely react into aluminum ions if the soaking time is long, so that the fixture can be completely reacted with the liquid medicine; (2) the acid deplating liquid is deplating without damaging the aluminum material, but the deplating effect is not obvious, and the protective oil on the aluminum fixture cannot be removed; (3) the aluminum fixture is not deplated, which causes the undesirable rise of oil level on the spraying edge, and the use cost is high without recycling.
Therefore, it is urgently needed to develop a deplating solution and a deplating method capable of effectively removing the sprayed aluminum jig so as to meet the practical requirements.
Disclosure of Invention
The invention aims to provide a deplating solution capable of effectively removing protective oil on an aluminum clamp jig, and aims to solve the technical problems that in the prior art, the alkaline deplating solution can have a chemical reaction with an aluminum material, and the acidic deplating solution can not damage the aluminum material but has an unobvious deplating effect.
In order to achieve the aim, the invention provides a deplating solution which is characterized by comprising the following components in percentage by mass: 2-10% of tetramethylammonium hydroxide, 1-5% of benzotriazole, 1-10% of sodium metasilicate pentahydrate, 5-30% of diethylene glycol monomethyl ether, 0.5-2% of alkyl glycoside and the balance of pure water.
Further, the paint comprises the following components in percentage by mass: 5% of tetramethylammonium hydroxide, 2.5% of benzotriazole, 5% of sodium metasilicate pentahydrate, 15% of diethylene glycol monomethyl ether, 1% of alkyl glycoside and the balance of pure water.
The invention also provides a preparation method of the deplating solution, which comprises the following steps:
step 1, adding the weight of sodium metasilicate pentahydrate into water, stirring until the sodium metasilicate pentahydrate is completely dissolved, adding tetramethylammonium hydroxide and alkyl glycoside, and stirring until the mixture is clear and transparent to obtain a solution A;
step 2, uniformly stirring the diethylene glycol and the diethylene glycol methyl ether with the weight, adding the benzotriazole, and stirring until the benzotriazole is completely dissolved to obtain a solution B;
and 3, uniformly mixing the solution A and the solution B, and stirring until the mixture is completely clear.
The invention also provides a deplating process, which specifically comprises the following steps:
firstly, placing an aluminum jig with residual protective oil on the surface in a container filled with the deplating solution as claimed in claim 1 for soaking;
secondly, cleaning the soaked aluminum fixture;
and thirdly, drying the cleaned aluminum jig to obtain the deplated product.
Further, in the first step, the soaking container is a single-groove ultrasonic cleaning machine.
Further, in the first step, the parameters set by the ultrasonic cleaning machine are as follows: the ultrasonic current is 2-3A, the temperature is set to 80-100 deg.C, and the time is set to 30-50 min.
Furthermore, in the first step, a deplating frame is arranged in the soaking container.
Furthermore, the deplating frame is a stainless steel deplating frame.
The invention has the following beneficial effects:
1. the invention provides a deplating solution, which is a weakly alkaline deplating solution, the pH value of the deplating solution is about 8, and the surface of an aluminum clamp jig is free from protective oil residue after being cleaned by the deplating solution, so that the protective oil after spraying can be effectively removed, the spraying reject ratio is greatly reduced, and the service life of the aluminum clamp jig is prolonged.
2. According to the deplating solution provided by the invention, the sodium metasilicate pentahydrate is added to replace inorganic alkali such as sodium hydroxide and the like, so that the reaction between the deplating solution and the aluminum clamp jig is avoided, and meanwhile, the added sodium metasilicate pentahydrate can provide a corrosion inhibition effect on the aluminum clamp jig and protect the aluminum clamp jig from being corroded.
3. According to the deplating solution provided by the invention, the added tetramethyl ammonium hydroxide belongs to weak alkali, so that the aluminum fixture is not corroded while stable alkalinity is provided.
4. The stripping solution provided by the invention can improve the permeability of the stripping solution, accelerate the speed of ink glass and improve the stripping effect by adding the alkyl glycoside.
5. According to the deplating solution provided by the invention, a layer of protective film can be formed on the surface of the aluminum clamp jig by adding the benzotriazole serving as a corrosion inhibitor, so that the aluminum clamp jig is prevented from being corroded under an alkaline condition.
6. The deplating solution provided by the invention is an environment-friendly and low-toxicity deplating solution, has small smell, small volatility and long service life, prolongs the service life by 50% compared with products sold on the market, and improves the deplating rate by 30%. In addition, the deplating liquid is simple in preparation method, the process steps of the deplating method are simplified, the aluminum clamp jig and the deplating liquid can be placed into an ultrasonic cleaning machine together, relevant parameters are set, a power switch is started, the purpose of removing oil can be achieved by washing with clear water after cleaning is finished, no residue is left on the surface, and the qualified rate of oil removal is up to more than 99%. According to the deplating process provided by the invention, after deplating in the ultrasonic cleaning machine, the aluminum fixture is removed completely, and the aluminum fixture is rinsed and dried by clear water and can be recycled.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below.
Detailed Description
The following is a detailed description of embodiments of the invention, but the invention can be implemented in many different ways, as defined and covered by the claims.
Example 1:
the deplating solution comprises the following components in percentage by mass: 2% of tetramethylammonium hydroxide, 1% of benzotriazole, 1% of sodium metasilicate pentahydrate, 5% of diethylene glycol methyl ether, 0.5% of alkyl glycoside and 85.5% of water.
The preparation method of the deplating solution comprises the following steps of adding the weight of sodium metasilicate pentahydrate into water, stirring until the sodium metasilicate pentahydrate is completely dissolved, adding the tetramethylammonium hydroxide and the alkyl glycoside, and stirring until the mixture is clear and transparent to obtain solution A;
B. uniformly stirring the diethylene glycol and the diethylene glycol methyl ether according to the weight, adding the benzotriazole, and stirring until the materials are completely dissolved to obtain a solution B;
C. and uniformly mixing the solution A and the solution B, and stirring until the mixture is completely clear.
The deplating process specifically comprises the following steps of taking a deplating solution stock solution for use, measuring the pH value to be 8, putting the sprayed aluminum clamp jig into a Kodak single-groove ultrasonic cleaner filled with the deplating solution prepared in the embodiment, and arranging a stainless steel deplating frame below the aluminum clamp jig. The parameters of the ultrasonic cleaner are as follows: ultrasonic current 2.5A, temperature 90 deg.C, time 40 min.
Example 2:
the deplating solution comprises the following components in percentage by mass: 5% of tetramethylammonium hydroxide, 2.5% of benzotriazole, 5% of sodium metasilicate pentahydrate, 15% of diethylene glycol methyl ether, 1% of alkyl glycoside and 56.5% of water.
The preparation method and the deplating process of the deplating solution in this example are the same as those in example 1.
Example 3:
the deplating solution comprises the following components in percentage by mass: 7% of tetramethylammonium hydroxide, 3% of benzotriazole, 7% of sodium metasilicate pentahydrate, 25% of diethylene glycol methyl ether, 1.5% of alkyl glycoside and 31.5% of water.
The preparation method and the deplating process of the deplating solution in this example are the same as those in example 1.
Example 4:
the deplating solution comprises the following components in percentage by mass: 10% of tetramethylammonium hydroxide, 5% of benzotriazole, 10% of sodium metasilicate pentahydrate, 20% of diethylene glycol, 30% of diethylene glycol methyl ether, 2% of alkyl glycoside and 23% of water.
The preparation method and the deplating process of the deplating solution in this example are the same as those in example 1.
Comparative example 1:
the deplating solution comprises the following components in percentage by mass: 15% of tetramethylammonium hydroxide, 10% of benzotriazole, 20% of sodium metasilicate pentahydrate, 20% of diethylene glycol, 30% of diethylene glycol methyl ether and 5% of alkyl glycoside.
The preparation method and the deplating process of the deplating solution in this example are the same as those in example 1.
Comparative example 2: the same deplating process as in example 1 was carried out using a commercially available alkaline deplating solution.
Comparative example 3: the same deplating process as in example 1 was carried out using an acidic deplating solution which is usually available on the market.
Comparative example 4: without adding any deplating solution, the same amount of pure water was added and put into a coanda single-tank ultrasonic cleaning machine with a deplating frame to deplate according to the same deplating process as in example 1.
Taking 160 sprayed aluminum clamp jig bases, randomly dividing the aluminum clamp jig bases into 8 groups, adding the deplating solutions of the embodiments 1-4 and the comparative examples 1-3 into 20 groups, adding none of the deplating solutions into clear water, deplating the aluminum clamp jig bases sprayed on each group according to the same deplating process, carrying out overall appearance inspection on each group of products with the protective oil removed, checking the ink removing effect of the jig bases, and calculating the yield of each group. The test results are shown in table 1:
as can be seen from table 1, the pH value of the deplating solution provided by the invention is weakly alkaline and does not react with the aluminum jig, and the aluminum jig base deplated by using the deplating solution has good appearance, high yield and high deinking rate. The alkaline deplating liquid reacts with the aluminum fixture to severely corrode the fixture, while the acidic deplating liquid which is usually sold on the market has a poor deplating effect, almost has the same effect as the pure water cleaning effect of the non-deplating liquid, and is difficult to clean the protective oil on the fixture.
According to the deplating solution provided by the invention, the sodium metasilicate pentahydrate is added to replace inorganic alkali such as sodium hydroxide and the like, so that the reaction between the deplating solution and the aluminum clamp jig is avoided, and meanwhile, the added sodium metasilicate pentahydrate can provide a corrosion inhibition effect on the aluminum clamp jig and protect the aluminum clamp jig from being corroded; the added tetramethyl ammonium hydroxide belongs to weak alkali, so that stable alkalinity can be provided, and meanwhile, the aluminum fixture is not corroded; by adding alkyl glycoside, the penetrating power of the deplating liquid can be improved, the speed of ink glass is increased, and the deplating effect is improved; by adding the benzotriazole serving as a corrosion inhibitor, a protective film can be formed on the surface of the aluminum clamp jig, so that the aluminum clamp jig is prevented from being corroded under an alkaline condition.
In addition, the deplating solution provided by the invention is an environment-friendly and low-toxicity deplating solution, has small smell, small volatility and long service life, prolongs the service life by 50 percent compared with products sold on the market, and improves the deplating rate by 30 percent. According to the deplating process provided by the invention, after deplating in the ultrasonic cleaning machine, the aluminum fixture is removed completely, and the aluminum fixture is rinsed and dried by clear water and can be recycled. The stainless steel plating removing frame is arranged below the aluminum clamp jig, so that the aluminum clamp jig can be completely soaked in the plating removing liquid, and the plating removing efficiency is greatly improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The deplating liquid is characterized by comprising the following components in percentage by mass: 2-10% of tetramethylammonium hydroxide, 1-5% of benzotriazole, 1-10% of sodium metasilicate pentahydrate, 5-30% of diethylene glycol monomethyl ether, 0.5-2% of alkyl glycoside and the balance of pure water.
2. The deplating solution according to claim 1, which is characterized by comprising the following components in percentage by mass: 5% of tetramethylammonium hydroxide, 2.5% of benzotriazole, 5% of sodium metasilicate pentahydrate, 15% of diethylene glycol monomethyl ether, 1% of alkyl glycoside and the balance of pure water.
3. The method for preparing the deplating solution according to claim 1, comprising the following steps:
step 1, adding the weight of sodium metasilicate pentahydrate into water, stirring until the sodium metasilicate pentahydrate is completely dissolved, adding tetramethylammonium hydroxide and alkyl glycoside, and stirring until the mixture is clear and transparent to obtain a solution A;
step 2, uniformly stirring the diethylene glycol and the diethylene glycol methyl ether with the weight, adding the benzotriazole, and stirring until the benzotriazole is completely dissolved to obtain a solution B;
and 3, uniformly mixing the solution A and the solution B, and stirring until the mixture is completely clear.
4. The deplating process is characterized by comprising the following steps:
firstly, placing an aluminum jig with residual protective oil on the surface in a container filled with the deplating solution as claimed in claim 1 for soaking;
secondly, cleaning the soaked aluminum fixture;
and thirdly, drying the cleaned aluminum jig to obtain the deplated product.
5. The deplating process according to claim 4, wherein in the first step, the soaking vessel is a single tank ultrasonic cleaner.
6. The deplating process according to claim 5, wherein in the first step, the parameters set by the ultrasonic cleaning machine are as follows: the ultrasonic current is 2-3A, the temperature is set to 80-100 deg.C, and the time is set to 30-50 min.
7. The deplating process according to claim 4, wherein in the first step, a deplating rack is arranged in the soaking container.
8. The deplating process according to claim 7, wherein the deplating frame is a stainless steel deplating frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811068470.6A CN108977817B (en) | 2018-09-13 | 2018-09-13 | Deplating liquid, preparation method of deplating liquid and deplating process |
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| CN201811068470.6A CN108977817B (en) | 2018-09-13 | 2018-09-13 | Deplating liquid, preparation method of deplating liquid and deplating process |
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| CN108977817A CN108977817A (en) | 2018-12-11 |
| CN108977817B true CN108977817B (en) | 2020-07-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011999B2 (en) * | 1983-01-21 | 1985-03-29 | 工業技術院長 | Aquaculture equipment cleaning agent |
| US5942483A (en) * | 1998-02-10 | 1999-08-24 | Leu; Shiow Jiuan Freida | High molecular weight, solid state active detergent |
| CN1418942A (en) * | 2001-11-14 | 2003-05-21 | 金元振 | Detergent for high molecular synthetic resin spectacle lens and moulding die |
| CN107164103A (en) * | 2017-05-16 | 2017-09-15 | 重庆晋豪美耐皿制品有限公司 | A kind of high-performance scale removal detergent with sterilizing, its preparation method and its application method |
| CN108218241A (en) * | 2016-12-22 | 2018-06-29 | 蓝思科技（长沙）有限公司 | The decoating liquid and its application method of a kind of glass surface film layer and application |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100313062B1 (en) * | 2000-02-19 | 2001-11-07 | 김원진 | A lotion for the resin spectacle lenses and mold thereon |
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2018
- 2018-09-13 CN CN201811068470.6A patent/CN108977817B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011999B2 (en) * | 1983-01-21 | 1985-03-29 | 工業技術院長 | Aquaculture equipment cleaning agent |
| US5942483A (en) * | 1998-02-10 | 1999-08-24 | Leu; Shiow Jiuan Freida | High molecular weight, solid state active detergent |
| CN1418942A (en) * | 2001-11-14 | 2003-05-21 | 金元振 | Detergent for high molecular synthetic resin spectacle lens and moulding die |
| CN108218241A (en) * | 2016-12-22 | 2018-06-29 | 蓝思科技（长沙）有限公司 | The decoating liquid and its application method of a kind of glass surface film layer and application |
| CN107164103A (en) * | 2017-05-16 | 2017-09-15 | 重庆晋豪美耐皿制品有限公司 | A kind of high-performance scale removal detergent with sterilizing, its preparation method and its application method |
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| CN108977817A (en) | 2018-12-11 |
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