CN108425115B - Environment-friendly tin stripping liquid - Google Patents
Environment-friendly tin stripping liquid Download PDFInfo
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- CN108425115B CN108425115B CN201810212583.2A CN201810212583A CN108425115B CN 108425115 B CN108425115 B CN 108425115B CN 201810212583 A CN201810212583 A CN 201810212583A CN 108425115 B CN108425115 B CN 108425115B
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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
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/30—Acidic compositions for etching other metallic material
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses an environment-friendly tin stripping liquid which comprises the following components in percentage by weight: sulfuric acid: 5-50%; oxidizing agent: 1-20%; complexing agent: 1-20%; accelerator: 1-20%; surfactant (b): 1-10%; water: and (4) the balance. The invention can replace nitric acid to deplate and clean electrotinning and chemical tinning, reduce nitrogen-containing waste water discharge and nitric oxide and nitrogen dioxide toxic gas discharge generated by using nitric acid, and avoid the problems of potential safety hazard and the like caused by using nitric acid.
Description
Technical Field
The invention relates to an environment-friendly tin stripping solution for replacing nitric acid to clean and strip electrolytic tinning and chemical tinning, and belongs to the field of metal stripping.
Background
Since 1843, the patent of electroplating tin has been published, the technology of electroplating tin is advanced with the development of science and technology for over a hundred years, and is mainly used as a protective coating of steel metal at first. However, with the rise of the third industrial revolution in the middle of the 20 th century, the development of the electronic industry is rapidly advanced, and tin (and its alloy) plating is gradually applied to the electronic industries such as semiconductor devices, connectors, resistance capacitors and the like as a solder plating due to its excellent solderability.
At present, the industrialization of electrotinning is mature and widely applied in various departments. However, the deplating technology of electroplating tin and chemical tin plating has not been developed, and the nitric acid is still used to deplate and clean the tin metal on the jig or the product. It is presumed that the electrolytic tinning and chemical tinning needs to be deplated and cleaned by nitric acid every year in China, and the amount of the nitric acid used is as high as 100 million tons. Nitric acid is a volatile inorganic acid with strong oxidizing property and strong corrosiveness. In the using process of the nitric acid, the nitric acid can volatilize to form acid mist, so that the atmosphere is polluted; can decompose to form nitrogen dioxide yellow smoke and nitric oxide psychotoxic gas; the skin can be seriously burned to form scars when the skin is touched, so that the potential safety hazard is formed to the personal safety of field operators; and the wastewater contains a high concentration of total nitrogen. It is presumed that the discharge amount of nitric acid waste liquid and nitrogen-containing washing water generated after domestic use of a nitric acid and nitric acid tank is about 1000 million tons per year, which causes serious pollution to water resources.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an environment-friendly tin stripping solution which can be used for replacing nitric acid to deplate and clean electrotinning and chemical tinning, reduce nitrogen-containing wastewater discharge and nitric oxide and nitrogen dioxide toxic gas discharge generated by using nitric acid, and avoid the problems of potential safety hazard and the like caused by using nitric acid.
In order to achieve the purpose, the invention adopts the following technical scheme: the environment-friendly tin stripping liquid comprises the following components in percentage by weight:
sulfuric acid: 5-50%;
oxidizing agent: 1-20%;
complexing agent: 1-20%;
accelerator: 1-20%;
surfactant (b): 1-10%;
water: and (4) the balance.
Further, the oxidant is at least one of hydrogen peroxide, potassium permanganate, sodium permanganate, potassium hydrogen persulfate and sodium persulfate.
Further, the complexing agent is at least one of ethylenediamine tetraacetic acid, sodium sulfide, citric acid, tartaric acid, oxalic acid and dithiopropanol.
Further, the accelerator is at least one of ethanolamine, tetrahydrofurfuryl alcohol, 1, 4-butanediol, n-propanol, cyclohexylamine, sodium phenolsulfonate, phenolsulfonic acid, cresolsulfonic acid and dipropylene glycol methyl ether.
Further, the surfactant is at least one of isooctylamine, n-butylamine, propyl naphthalene sulfonate, linear alkyl benzene sulfonate, fatty alcohol-polyoxyethylene ether sodium sulfate, fatty alcohol-polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate, nonylphenol polyoxyethylene ether, diethanol amide, stearic acid monoglyceride, lignosulfonate, heavy alkylbenzene sulfonate, alkyl sulfonate and butyl naphthalene sulfonate.
Has the advantages that:
1. sulfuric acid and auxiliary complexes thereof are used for replacing nitric acid to carry out deplating and cleaning on electrolytic tinning and chemical tinning, so that the waste gas pollution and the discharge of nitrogen-containing waste water generated in the deplating and cleaning process by using nitric acid are reduced;
2. the invention is an environment-friendly agent for deplating and cleaning tin metal in a sulfuric acid system, has no toxicity, no pollution, no flammability and no explosion, and meets the environmental protection standards and import and export requirements of various countries in the world.
The specific implementation mode is as follows:
the present invention is explained further below.
The invention relates to an environment-friendly tin stripping liquid which comprises the following components in percentage by weight:
sulfuric acid: 5-50%;
oxidizing agent: 1-20%;
complexing agent: 1-20%;
accelerator: 1-20%;
surfactant (b): 1-10%;
water: and (4) the balance.
In the invention, the oxidant plays a role of a corrosive agent under an acidic condition, the accelerator is added on the basis of sulfuric acid and the oxidant to accelerate the deplating speed of tin metal, meanwhile, the accelerator can also inhibit the decomposition of the oxidant so as to obtain a stable deplating speed, the complexing agent is added to complex tin ions in the solution to prevent the tin ions from precipitating, and the surfactant is added to increase the surface activity of the metal and improve the uniformity and stability of corrosion.
Preferably, the oxidant is at least one of hydrogen peroxide, potassium permanganate, sodium permanganate, potassium hydrogen persulfate and sodium persulfate.
Preferably, the complexing agent is at least one of ethylenediamine tetraacetic acid, sodium sulfide, citric acid, tartaric acid, oxalic acid and dithiopropanol.
Preferably, the accelerator is at least one of ethanolamine, tetrahydrofurfuryl alcohol, 1, 4-butanediol, n-propanol, cyclohexylamine, sodium phenolsulfonate, phenolsulfonic acid, cresolsulfonic acid and dipropylene glycol methyl ether.
Preferably, the surfactant is at least one of isooctylamine, n-butylamine, propyl naphthalene sulfonate, linear alkylbenzene sulfonate, fatty alcohol-polyoxyethylene ether sodium sulfate, fatty alcohol-polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate, nonylphenol polyoxyethylene ether, diethanol amide, stearic acid monoglyceride, lignosulfonate, heavy alkylbenzene sulfonate, alkyl sulfonate and butyl naphthalene sulfonate.
The following are several sets of comparative examples:
comparative example 1
Weighing the following components in percentage by mass to prepare a nitric acid solution:
nitric acid at a concentration of 68%: 50 percent;
water: 50 percent.
Comparative example 2
Weighing the following components in percentage by mass to prepare the environment-friendly tin stripping liquid:
comparative example 3
Weighing the following components in percentage by mass to prepare the environment-friendly tin stripping liquid:
comparative example 4
Weighing the following components in percentage by mass to prepare the environment-friendly tin stripping liquid:
comparative example 5
Weighing the following components in percentage by mass to prepare the environment-friendly tin stripping liquid:
according to the stripping speed, the stripping effect and the stability of each comparative example, the working environment of the stripping process and the pollution degree of wastewater generated by stripping are compared, and the comparison results are as follows:
| comparative examples | Deplating speed | Deplating effect | Stability of | Working environment | Degree of wastewater pollution |
| Example 1 | 2.5um/min | Good wine | Difference (D) | Difference (D) | Severe pollution |
| Example 2 | 4.0um/min | Superior food | Superior food | (Comfort) | Environment-friendly |
| Example 3 | 3.9um/min | Superior food | Superior food | (Comfort) | Environment-friendly |
| Example 4 | 3.8um/min | Superior food | Superior food | (Comfort) | Environment-friendly |
| Example 5 | 4.3um/min | Superior food | Superior food | (Comfort) | Environment-friendly |
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. The environment-friendly tin stripping liquid is characterized by comprising the following components in percentage by weight:
sulfuric acid: 5-50%;
oxidizing agent: 1-20%;
complexing agent: 10-20%;
accelerator: 1-20%;
surfactant (b): 5-10%;
water: the balance;
the oxidant is at least one of hydrogen peroxide, potassium permanganate, sodium permanganate, potassium hydrogen persulfate and sodium persulfate;
the complexing agent is citric acid;
the accelerator is ethanolamine;
the surfactant is at least one of isooctylamine, n-butylamine, propyl naphthalene sulfonate, linear alkyl benzene sulfonate sodium, fatty alcohol-polyoxyethylene ether sodium sulfate, fatty alcohol-polyoxyethylene ether ammonium sulfate, lauryl alcohol sodium sulfate, diethanol amide, stearic acid monoglyceride, lignosulfonate, heavy alkylbenzene sulfonate, alkyl sulfonate and butyl naphthalene sulfonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810212583.2A CN108425115B (en) | 2018-03-15 | 2018-03-15 | Environment-friendly tin stripping liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810212583.2A CN108425115B (en) | 2018-03-15 | 2018-03-15 | Environment-friendly tin stripping liquid |
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| Publication Number | Publication Date |
|---|---|
| CN108425115A CN108425115A (en) | 2018-08-21 |
| CN108425115B true CN108425115B (en) | 2021-04-27 |
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| CN201810212583.2A Active CN108425115B (en) | 2018-03-15 | 2018-03-15 | Environment-friendly tin stripping liquid |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628934B (en) * | 2018-08-30 | 2021-04-16 | 上海昕沐化学科技有限公司 | Environmentally friendly tin stripping liquid and preparation method thereof |
| CN109440109A (en) * | 2018-11-13 | 2019-03-08 | 南通赛可特电子有限公司 | A kind of tin stripping liquid and preparation method thereof |
| CN109898085B (en) * | 2019-04-10 | 2021-07-09 | 深圳市松柏实业发展有限公司 | Tin stripping composition liquid and tin stripping method |
| CN112663063A (en) * | 2020-12-10 | 2021-04-16 | 广东臻鼎环境科技有限公司 | Tin stripping liquid and method for recycling tin stripping liquid after application |
| CN113755841A (en) * | 2021-09-10 | 2021-12-07 | 珠海市板明科技有限公司 | Environment-friendly fixture coating cleaning agent, preparation method and fixture cleaning method |
| CN115110080B (en) * | 2022-06-24 | 2024-03-15 | 华南理工大学 | Environment-friendly hanger tin-copper stripping liquid and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862042A (en) * | 2016-06-08 | 2016-08-17 | 广东工业大学 | Nickel stripping solution and preparation method and application thereof |
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| CN105714298B (en) * | 2016-03-23 | 2019-01-29 | 广东利尔化学有限公司 | It is a kind of based on sulfuric acid-molysite system etching agent and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862042A (en) * | 2016-06-08 | 2016-08-17 | 广东工业大学 | Nickel stripping solution and preparation method and application thereof |
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