CN103031453A - Smoke-free reduction powder and anti-oxidation method thereof - Google Patents
Smoke-free reduction powder and anti-oxidation method thereof Download PDFInfo
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- CN103031453A CN103031453A CN2012104916408A CN201210491640A CN103031453A CN 103031453 A CN103031453 A CN 103031453A CN 2012104916408 A CN2012104916408 A CN 2012104916408A CN 201210491640 A CN201210491640 A CN 201210491640A CN 103031453 A CN103031453 A CN 103031453A
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Abstract
The invention discloses smoke-free reduction powder and an anti-oxidation method thereof, and relates to the field of welding. The smoke-free reduction powder comprises sodium fluoroborate and one of or a mixture of ammonium fluoroborate and potassium fluoroborate. The anti-oxidation method for the smoke-free reduction powder comprises the following steps of: covering a layer of sodium fluoroborate on the surface of a tin alloy; and covering one of or the mixture of the ammonium fluoroborate and the potassium fluoroborate on the surface of the sodium fluoroborate after 5 to 10 minutes. Because the anti-oxidation reduction powder is covered on the surface of a molten solder, the molten solder is isolated from air, oxidation is reduced, the consumption of a tin solder is reduced, the production cost is reduced, the smog produced in the using process of the anti-oxidation reduction powder is reduced, and the discharge of waste gases is reduced; and after the smoke-free anti-oxidation reduction powder is covered on the surface of the molten solder, the production of tin slag can be effectively prevented, the consumption of the tin solder is reduced, the production cost is reduced, the activity, wetting property and fluidity of the tin solder can be enhanced, the product quality is improved, and the product welding force is enhanced.
Description
Technical field
The present invention relates to welding field, relate in particular to a kind of smoke-less reducing powder and anti-oxidation method thereof.
Background technology
, can often use liquid metallic tin or tin alloy and be used for the welding effect especially in Electronic Assemblies industry in industrial production.But, tin alloy under high-temperature condition by solid-state become liquid state after, the as easy as rolling off a log and airborne oxygen generation of high-temperature liquid state tin alloy oxidizing reaction produces the oxidation scruff.And in contemporary electronic welding production process, wave soldering is a kind of welding set that the most generally uses, and its welding speed is fast, and production efficiency is high.But tin alloy can ceaselessly circulate when using wave soldering, and scolding tin is easier to produce more scruffs with air generation oxidation thereby make.More and more universal along with leadless process particularly, the rising of welding parameter temperature has more aggravated the oxidation of scolding tin.Mobile and the tin face height of the tin liquor that exerts an influence of scruff affects welding quality, is attached to the plate face, causes such as quality problems such as tin balls, directly affects the electric unfailing performance of electronic product.The additional management problem that the processing of scruff and transportation cause, and environment had certain impact.Loose oxidation sludge makes that air is easier to be rested in the fusion welding, thus the oxidation of aggravation scolder, and useful metal is wrapped up by scruff, can't utilize, and causes significant wastage, has increased production cost.
In order to save the scolder cost, improve welding quality, numerous scolding tin oxidation and products that tin slag reduction become scolding tin of preventing have appearred in protection of the environment on the market, and it mainly contains following several:
1, tin slag reduction powder, be about to tin slag reduction and become scolding tin, but in actual use, effect is unsatisfactory, and reduction ratio is low, and the smoke smell is large, cause sometimes whole workshop full of smoke, some in addition can produce a lot of Mars on scruff surface in use, the hidden danger that forms fire be arranged, employee's physical and mental health and personnel safety impacted.
2, solder splash reducing machine is unique a kind of equipment of purchasing the physical process of reducing scruff on the market, and its reduction ratio is higher, it is scruff to be drawn out equipment of rear usefulness reduce specially scruff from tin stove the inside, belong to afterwards and processing, fail from the generation of source control scruff, and when using solder splash reducing machine, working temperature is high, consume more electricity, wasted resource, when using solder splash reducing machine, can produce very large smoke and smell simultaneously, need put separately a shopwork, increase cost.
3, anti-oxidation reducing agent, liquid oily product, its oxidation-resistance and reductibility are all better, but owing to be liquid, it sticks on the Wave soldering apparatus easily, causes relatively difficulty of cleaning and maintenance, simultaneously its cigarette is large, and smell is heavier, sometimes even can be stained with on the pcb board.
4, install the nitrogen device additional, installing the nitrogen device additional not only can be from the generation of source control scruff, and can the Effective Raise welding quality, but nitrogen gas generator uses the cost height, actually use uneconomically, vast medium and small electronic enterprise can't be accepted from cost.
5, anti-oxidant powder, anti-oxidant powder are the generations of controlling scruff from the source, when it uses anti-oxidant powder evenly are sprinkling upon the surface of scolding tin, can form on the scolding tin surface layer protecting film scolding tin and air are completely cut off, and reduce the oxidation of scolding tin, reduce the generation of scruff.Numerous anti-oxidant reducing powders produces larger smog in use in the market, physical and mental health to user of service and plant personnel produces harm, at some electronic enterprises, because the workshop has filled the smog autoalarm, use the smog that anti-oxidant reducing powder produces even can activate the smog autoalarm, make the people take for the workshop presence of fire.
Summary of the invention
The present invention is directed in the prior art anti-oxidant reducing powder can produce larger smog and a kind of smoke-less reducing powder and anti-oxidation method thereof are provided when welding, this smoke-less reducing powder not only can prevent the liquid tin alloy oxidation effectively, and the tin alloy overwhelming majority of wrapping up in the scruff can be restored, effectively solve the problem of scruff, and can greatly reduce or reduce the smog that anti-oxidant reducing powder produces again in the applied at elevated temperature process.
A kind of smoke-less reducing powder comprises a kind of or its mixture in Sodium tetrafluoroborate and ammonium borofluoride, the potassium fluoborate.
A kind of anti-oxidation method of smoke-less reducing powder first at tin alloy surface coverage one deck Sodium tetrafluoroborate, was covered in a kind of or its mixture in ammonium borofluoride, the potassium fluoborate surface of Sodium tetrafluoroborate again after 5～10 minutes.
Above-mentioned when Sodium tetrafluoroborate is covered in the tin alloy surface, one or more in Sodium tetrafluoroborate in a small amount of fluorochemical of interpolation, muriate, the bromide.
When above-mentioned a kind of or its mixture in ammonium borofluoride, potassium fluoborate is covered in the Sodium tetrafluoroborate surface, one or more in a kind of or its mixture in ammonium borofluoride, potassium fluoborate in a small amount of fluorochemical of interpolation, muriate, the bromide.
Because ammonium borofluoride, Sodium tetrafluoroborate, potassium fluoborate etc. can form layer protecting film when covering the fusion welding surface and prevent scolder and contact with air; the protection scolder is not oxidized; effectively reduced the generation of scruff; but ammonium borofluoride, potassium fluoborate or its mixture are directly overlayed fusion welding when surface because high temperature can produce larger smog; and the 1-2 hour smog time length; have a strong impact on the shopwork environment; and although Sodium tetrafluoroborate covered fusion welding surface high temperature but smog seldom even smokelessly, greatly improved the Working environment in workshop.But, separately Sodium tetrafluoroborate is covered the fusion welding surface shortcoming is also arranged, because under the effect of high temperature, the Sodium tetrafluoroborate that covers the fusion welding surface can slowly liquefy, it is apparent in view just to liquefy after 1-2 hour, and its oxidation-resistance reduces greatly, although and that ammonium borofluoride, potassium fluoborate or its mixture are covered fusion welding surface smog is larger, but the phenomenon that can not occur liquefying, its anti oxidation time reaches 8-12 hour.Be the good characteristics of the little again antioxidant effect of smog in order to reach, the present invention adopts and first Sodium tetrafluoroborate is covered the fusion welding surface, make its smokeless or few cigarette, after 5-10 minute, again the mixture of ammonium borofluoride, potassium fluoborate or two kinds is covered the surface of Sodium tetrafluoroborate, like this because Sodium tetrafluoroborate is slowly liquefaction, and the mixture of ammonium borofluoride, potassium fluoborate or two kinds also is slowly to contact with fusion welding, smokeless or few cigarette when so just making it cover the fusion welding surface, and continued the long characteristics of its anti oxidation time.
The invention has the beneficial effects as follows: owing at the anti-oxidant reducing powder of fusion welding surface coverage, make fusion welding and air isolated, reduced oxidation, reduced the scolding tin consumption, save production cost, and reduced the smog that produces in the anti-oxidant reducing powder use procedure, reduced the discharging of waste gas; Behind the anti-oxidant reducing powder of surface coverage one deck smoke-less at fusion welding, not only can effectively prevent the generation of scruff, reduce the scolding tin consumption, save production cost, but also can strengthen activity, wettability, the flowability of scolding tin, and improve the quality of products, strengthen its welding force.
Description of drawings
Fig. 1 produces ammonia mass concentration and the graph of a relation of time after adding smoke-less reducing powder and coventional type reducing powder;
Wherein X-coordinate represent to add time behind smoke-less reducing powder and the coventional type reducing powder (minute);
Wherein ordinate zou represents to add the ammonia mass concentration mg/m that produces behind smoke-less reducing powder and the coventional type reducing powder
3(total mass number of contained pollutent in every cubic metres of air);
Wherein solid line represents that the smoke-less reducing powder produces ammonia mass concentration mg/m
3Curve;
Wherein dotted line represents that the coventional type reducing powder produces ammonia mass concentration mg/m
3Curve.
Fig. 2 produces carbonic acid gas mass concentration and the graph of a relation of time after adding smoke-less reducing powder and coventional type reducing powder;
Wherein X-coordinate represent to add time behind smoke-less reducing powder and the coventional type reducing powder (minute);
Wherein ordinate zou represents to add the ammonia mass concentration mg/m that produces behind smoke-less reducing powder and the coventional type reducing powder
3(total mass number of contained pollutent in every cubic metres of air);
Wherein solid line represents that the smoke-less reducing powder produces ammonia mass concentration mg/m
3Curve;
Wherein dotted line represents that the coventional type reducing powder produces ammonia mass concentration mg/m
3Curve.
Embodiment
In order to illustrate in greater detail the present invention, provide following preparation example.But scope of the present invention is not limited to this.
Embodiment 1
The anti-oxidant reducing powder operation steps of smoke-less is as follows:
A, with the scruff full scale clearance in the tin stove;
B, the surface that 100～300 gram weight Sodium tetrafluoroborates are sprinkling upon molten tin alloy form crystallizing layer, play antioxygenation;
C, mistake covered the Sodium tetrafluoroborate surface with 200～300 gram weight ammonium borofluorides, potassium fluoborate or its mixture after 5～10 minutes, can add later on 30～50 grams every 4～12 hours again.
From Fig. 1 and Fig. 2 as can be known, use smoke-less reducing powder of the present invention and anti-oxidation method thereof, the NH that produces when welding than medium-sized reducing powder
3And CO
2Obviously to lack.
Claims (4)
1. a smoke-less reducing powder is characterized in that: comprise a kind of or its mixture in Sodium tetrafluoroborate and ammonium borofluoride, the potassium fluoborate.
2. the anti-oxidation method of a smoke-less reducing powder is characterized in that: first at tin alloy surface coverage one deck Sodium tetrafluoroborate, a kind of or its mixture in ammonium borofluoride, the potassium fluoborate is covered in the surface of Sodium tetrafluoroborate after 5～10 minutes again.
3. the anti-oxidation method of smoke-less reducing powder as claimed in claim 2 is characterized in that: when Sodium tetrafluoroborate is covered in the tin alloy surface, add in a small amount of fluorochemical, muriate, the bromide one or more in Sodium tetrafluoroborate.
4. the anti-oxidation method of smoke-less reducing powder as claimed in claim 2, it is characterized in that: when a kind of or its mixture in ammonium borofluoride, potassium fluoborate is covered in the Sodium tetrafluoroborate surface, one or more in a kind of or its mixture in ammonium borofluoride, potassium fluoborate in a small amount of fluorochemical of interpolation, muriate, the bromide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104916408A CN103031453A (en) | 2012-11-28 | 2012-11-28 | Smoke-free reduction powder and anti-oxidation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104916408A CN103031453A (en) | 2012-11-28 | 2012-11-28 | Smoke-free reduction powder and anti-oxidation method thereof |
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| Publication Number | Publication Date |
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| CN103031453A true CN103031453A (en) | 2013-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114833490A (en) * | 2022-06-02 | 2022-08-02 | 云南锡业集团（控股）有限责任公司研发中心 | Method for improving oxidation resistance of tin raw material or tin-based solder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3644115A (en) * | 1970-03-23 | 1972-02-22 | Tatsuta Densen Kk | Soldering filler metal |
| CN101693315A (en) * | 2009-11-12 | 2010-04-14 | 丁璐 | Molten state lead-free welding flux anti-oxidation reducing agent and preparation process thereof |
| JP2012024804A (en) * | 2010-07-23 | 2012-02-09 | Tetsuo Harada | Liquid flux |
| CN102528330A (en) * | 2012-01-12 | 2012-07-04 | 李平荣 | Molten solder anti-oxidation activated powder |
-
2012
- 2012-11-28 CN CN2012104916408A patent/CN103031453A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3644115A (en) * | 1970-03-23 | 1972-02-22 | Tatsuta Densen Kk | Soldering filler metal |
| CN101693315A (en) * | 2009-11-12 | 2010-04-14 | 丁璐 | Molten state lead-free welding flux anti-oxidation reducing agent and preparation process thereof |
| JP2012024804A (en) * | 2010-07-23 | 2012-02-09 | Tetsuo Harada | Liquid flux |
| CN102528330A (en) * | 2012-01-12 | 2012-07-04 | 李平荣 | Molten solder anti-oxidation activated powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114833490A (en) * | 2022-06-02 | 2022-08-02 | 云南锡业集团（控股）有限责任公司研发中心 | Method for improving oxidation resistance of tin raw material or tin-based solder |
| CN114833490B (en) * | 2022-06-02 | 2024-04-05 | 云南锡业集团（控股）有限责任公司研发中心 | Method for improving oxidation resistance of tin raw material or tin-based solder |
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