CN1201032C - Tin cladding surface antioxidant and use process thereof - Google Patents
Tin cladding surface antioxidant and use process thereof Download PDFInfo
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- CN1201032C CN1201032C CN 03119045 CN03119045A CN1201032C CN 1201032 C CN1201032 C CN 1201032C CN 03119045 CN03119045 CN 03119045 CN 03119045 A CN03119045 A CN 03119045A CN 1201032 C CN1201032 C CN 1201032C
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- antioxidant
- inhibiter
- tin coating
- auxiliary
- tin
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
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Abstract
The present invention relates to an antioxidant for a tin plated layer, which is characterized in that the antioxidant is a transparent liquid without suspended substances mainly prepared by that organic passivation corrosion inhibitors, auxiliary corrosion inhibitors and PH stabilizing agents are mixed; the structure of the passivation corrosion inhibitors has N-H bonds or at least one N bond of other forms, and comprises an azole class and a thiazole class; the auxiliary corrosion inhibitors are inorganic salts which comprise sodium salts and potassium salts; the PH stabilizing agents are sodium salts. The technique of using the antioxidant is carried out in the solutions with the PH value between eight and ten, 100 ml/L of the antioxidant is added to the solutions, and dipping is carried at the room temperature to 60 DEG C for several minutes. When the antioxidant and the technique are adopted, the anti-oxidation properties of the surface of a tin-plated layer are enhanced, and the welding performance is favorably improved. The antioxidant and the technique have the advantages of simple and convenient operation modes, convenient maintenance and no toxic hazard of chromic acid; the production cost is reduced. The present invention solves the problems that the surface of the tin plated layer is oxidized, discolored and corroded, and the welding performance is poor; the present production of tin plated layers is beset with the problems for a long time.
Description
Technical field: the present invention relates to a kind of tin coating surface anti-oxidant and use technology.
Background technology: the steel part soldering needs the surface to electroplate one deck tin earlier, owing to be added with a large amount of additives in the tin plating electrolyte, not easy cleaning, and tin coating is easily oxidation in corrosive environment, generates SnO or SnO
2, increase the welding difficulty, in addition, the tin coating porosity is higher, is again cathodic coating with respect to the iron-based body, production process and often occur between staging life getting rusty, influence part welding quality and assembly paint quality, make piece surface cause component and assembly to scrap because of welding defective and getting rusty.
Summary of the invention: the present invention is in order to solve problems such as tin coating surface oxidation-resistant variable color corrosion, propose a kind of tin coating antioxidant, it is characterized in that: described antioxidant is mainly to be the transparent no suspended substance liquid that is mixed by organic passivation inhibiter, auxiliary inhibiter, pH stablizer; Described passivation inhibiter is that structure must have the N-H key or have an other forms of N key at least, comprises azole, thiazoles; Described auxiliary inhibiter is inorganic salt, comprises sodium salt, sylvite; Described pH stablizer is a sodium salt.The treatment process that uses this antioxidant is in the solution that is added with 100ml/L above-mentioned antioxidant of pH value between 8～10, floods under room temperature or the temperature condition more than the room temperature.
Adopt this antioxidant and technology, improved the surface oxidation-resistant performance, and welding property obtains good improvement, this technological operation is easy, easy to maintenance, need room temperature～60 ℃ following operation, three-waste free pollution again, save energy reduces production costs, and has fundamentally solved long-term puzzlement and has now produced tin coating surface oxidation variable color corrosive problem.
Embodiment: tin coating antioxidant of the present invention is the transparent no suspended substance liquid that is mixed by essential substance such as organic passivation inhibiter, auxiliary inhibiter, pH stablizers.The organic inhibitor of wherein selecting for use is that structure must have the N-H key or have the organism of an other forms of N key at least, comprises azole, thiazoles etc., specifically can be benzotriazole, 2-hydroxybenzene a pair of horses going side by side thiazole, benzimidazolyl; After this type organic arrives tin spare surface by adsorption after the dissolution with solvents under certain condition, can form stable insoluble complex with tin, not only water insoluble but also be insoluble to organic solvent, form dense film on the surface, has antioxygenation, make not easy oxidation discoloration of tin surfaces, be adsorbed in the surface and play protective effect, its passivation film quality is good.
In order to guarantee the wettability of film, homogeneity, hydrophobicity, do not produce greyness and current mark, improve the anti-oxidant metachrosis of film, simultaneously many at the coating hole of tin coating, select for use inorganic salt as auxiliary inhibiter, it mainly is sodium salt, sylvite, comprise Trisodium Citrate, Sodium orthomolybdate, Tripotassium Citrate etc., these inorganic salt have the sealing of hole effect, also have cleanup action simultaneously, on the metallic surface of handling, can contain the N-H key or have the organism acting in conjunction of an other forms of N key at least, form a kind of fine and close transparent thin film layer at the metallic tin laminar surface with structure, water-fast flushing is insoluble to organic solvent.
Can stablize within the specific limits for the pH value that makes antioxidant, select the pH stablizer of sodium salt for use, comprise yellow soda ash, water glass, tertiary sodium phosphate, sodium lauryl sulphate etc. as antioxidant; This sodium salt is controlled at 8～10 with the pH value of antioxidation treatment liquid, has both guaranteed that the tin laminar surface does not corrode, and can assist cleaning again, has played neutralization of acid with base.
The main component of tin coating surface anti-oxidant of the present invention is formed content: azole or thiazole are 0.01～50g/L, and auxiliary inhibiter is 0.5～50g/L, and the pH stablizer is 0.2～100g/L.Concrete test recipe data statistics sees the following form 1:
This antioxidant of table 1 is formed the proportioning test data statistic
| Sequence number | Composition | Proportioning | Effect |
| Prescription 1 | Benzotriazole | 35g/L | Film formation time is short, and film is even. |
| Trisodium Citrate | 25g/L | ||
| Yellow soda ash | 50g/L | ||
| Sodium lauryl sulphate | On a small quantity | ||
| Prescription 2 | 2-hydroxybenzene a pair of horses going side by side thiazole | 20g/L | Film forming is even.Scavenging period need be grown. |
| Sodium orthomolybdate | 10g/L | ||
| Water glass | 100g/L | ||
| Prescription 3 | Benzotriazole | 10g/L | Film formation time is short, and film is even. |
| Sodium orthomolybdate | 40g/L | ||
| Tertiary sodium phosphate | 20g/L | ||
| Sodium lauryl sulphate | On a small quantity | ||
| Prescription 4 | Benzimidazolyl | 2g/L | Film formation time is long, and film is even. |
| Tripotassium Citrate | 5g/L | ||
| Yellow soda ash | 80g/L |
Use the technical recipe of this antioxidant to be:
Antioxidant 100ml/L
Temperature room temperature～60 ℃
2～4 minutes time
PH value 8～10
Processing mode dipping, spray
Handle back in time washing, drying, can dry up or dry.
The preparation of oxidation resistance liquid during use: be the water of elder generation by the liquor capacity adding 50% of required configuration, add the antioxidant 100ml/L that configures then, restock water promptly uses to volume required stirring, and the pH value of oxidation resistance liquid is between 8～10 at this moment.
Use the equipment of this technology simple, only increase a dipping operation and get final product, treated workpiece under room temperature～60 ℃, is immersed in this solution 2～4 minutes, take out in time to wash and dry up or dry in zinc-plated washing back.And can use flexibly according to producing needs.
As: 1) zinc-plated-→ cold wash-→ antioxidation treatment liquid dipping;
2) zinc-plated-→ cold wash-→ hot water wash-→ antioxidation treatment liquid dipping;
3) zinc-plated-→ cold wash-→ hot water+antioxidation treatment liquid dipping;
4) be difficult for dipping for special product (as big part, complex-shaped), also can adopt the mode of spray.
After the antioxidation treatment, several mode dryings can be arranged also:
As: 1) hot water wash-→ air-dry or dry up;
2) cold wash-→ 60 ℃ oven dry;
3) cold wash-→ air-dry or dry up.
Claims (7)
1, a kind of tin coating antioxidant is characterized in that: described antioxidant mainly is the transparent no suspended substance liquid that is mixed by organic passivation inhibiter, auxiliary inhibiter, pH stablizer; Described passivation inhibiter is that structure must have the N-H key or have an other forms of N key at least, comprises azole, thiazoles; Described auxiliary inhibiter is inorganic salt, comprises sodium salt, sylvite; Described pH stablizer is a sodium salt.
2, tin coating antioxidant as claimed in claim 1 is characterized in that: described organic passivation inhibiter is benzotriazole, 2-hydroxybenzene a pair of horses going side by side thiazole, benzimidazolyl.
3, tin coating antioxidant as claimed in claim 1 is characterized in that: the auxiliary inhibiter of described inorganic salt is Trisodium Citrate, Sodium orthomolybdate, Tripotassium Citrate.
4, tin coating antioxidant as claimed in claim 1 is characterized in that: described sodium salt pH stablizer comprises yellow soda ash, water glass, tertiary sodium phosphate, sodium lauryl sulphate.
5, tin coating antioxidant as claimed in claim 1, it is characterized in that: the composition content of described organic passivation inhibiter, auxiliary inhibiter, pH stablizer is: azole or thiazole are 0.01～50g/L, auxiliary inhibiter is 0.5～50g/L, and the pH stablizer is 0.2～100g/L.
6, the use technology of tin coating antioxidant as claimed in claim 1, it is characterized in that: with zinc-plated workpiece washing back in the pH value is the solution that is added with the above-mentioned antioxidant of 100ml/L between 8～10, dipping or spray under the temperature condition of room temperature～60 ℃ are handled back washing and drying in time.
7, the use technology of tin coating antioxidant as claimed in claim 6 is characterized in that: described drying mode be air-dry, dry up or dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03119045 CN1201032C (en) | 2003-05-05 | 2003-05-05 | Tin cladding surface antioxidant and use process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03119045 CN1201032C (en) | 2003-05-05 | 2003-05-05 | Tin cladding surface antioxidant and use process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1456706A CN1456706A (en) | 2003-11-19 |
| CN1201032C true CN1201032C (en) | 2005-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03119045 Expired - Lifetime CN1201032C (en) | 2003-05-05 | 2003-05-05 | Tin cladding surface antioxidant and use process thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN1201032C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498856B (en) * | 2013-05-20 | 2017-03-29 | 河北工程大学 | A kind of high pure spelter coating hole sealing agent of anti-rotten electric arc spraying and preparation technology and its application |
| CN104261876B (en) * | 2014-09-24 | 2015-12-30 | 东莞市凯昶德电子科技股份有限公司 | A kind of ceramic substrate anti-oxidation treatment method |
| CN107488845B (en) * | 2016-06-11 | 2019-11-19 | 上海梅山钢铁股份有限公司 | A kind of chromium-free passivation liquid and its application method for tin plate |
| CN108315789A (en) * | 2018-03-01 | 2018-07-24 | 深圳市盛元半导体有限公司 | A kind of copper-based tin plating high temperature resistant protective agent |
| CN108505080A (en) * | 2018-04-13 | 2018-09-07 | 德庆县瑞晶电子材料有限公司 | A kind of DRH-30 compounds for tin-plated product surface post-processing function |
| CN110093598A (en) * | 2019-05-18 | 2019-08-06 | 深圳市创智成功科技有限公司 | For protecting the tin face protective agent of chemical tin coating |
| CN110564244B (en) * | 2019-09-19 | 2021-05-18 | 东莞市通科电子有限公司 | Protective agent for tin coating of electronic component pin |
| CN112501665A (en) * | 2020-11-30 | 2021-03-16 | 南通麦特隆新材料科技有限公司 | Protective agent after electrotinning and preparation method thereof |
| CN115044894B (en) * | 2022-06-22 | 2024-05-07 | 西安创联华特表面处理技术有限责任公司 | Water-based protective agent shared by gold and tin plating layers and preparation method thereof |
-
2003
- 2003-05-05 CN CN 03119045 patent/CN1201032C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1456706A (en) | 2003-11-19 |
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Granted publication date: 20050511 |