CN101396776A - Acid-cleaning avoid welding flux and preparation method thereof - Google Patents
Acid-cleaning avoid welding flux and preparation method thereof Download PDFInfo
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- CN101396776A CN101396776A CNA2007100463592A CN200710046359A CN101396776A CN 101396776 A CN101396776 A CN 101396776A CN A2007100463592 A CNA2007100463592 A CN A2007100463592A CN 200710046359 A CN200710046359 A CN 200710046359A CN 101396776 A CN101396776 A CN 101396776A
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- pickling
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- free flux
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Abstract
The invention provides a pickling-free flux, comprising 37-47% of trimethyl borate (by weight); preferably, the weight percentage of the trimethyl borate is 40%. The invention also provides a method used for preparing the pickling-free flux, comprising the steps as follows: under the conditions of temperature of 45-50DEG C, the pressure of 1Pa-1.2Pa and the catalyst of potassium permanganate, boracic acid and carbinol react completely, filtrated and washed to a neutral state, thus gaining the pickling-free flux; furthermore, the pickling-free flux is dried suitably. The pickling-free flux has simple and convenient usage, good film-forming effect, no residues after brazing and no corrosion phenomenon occurring on brazing workpiece, reduces the brazing cost, and protects the environment; the preparation method is simple and convenient and the gained product has high purity.
Description
Technical field
The present invention relates to the soldering tech field, particularly the scaling powder field specifically is meant a kind of pickling scaling powder and preparation method thereof of exempting from.
Background technology
In traditional brazing process, brazing flux serves as the key player always, but rapidly in all kinds of manufacturing development in recent years, requirement to solder flux is also improving constantly, at present still come from former Soviet Union's industrial products of 40～fifties at widely used GB102 type brazing flux, in the soldering tech early stage of development, people also just require to have a good welding quality, and in the condition of locality and the requirement of " quality " is also rested on welded seam connect two mother metals and whether reach requirement, but today after more than halfth century, produce great variety has taken place, people are strict more in the requirement to product, not only to make welding quality reach requirement, also will accomplish attractive in appearancely simultaneously, good vision be arranged and contact feel in outward appearance.In the GB102 brazing flux, also added the fluoride (for example: potassium fluoborate, sodium, potassium fluoride, sodium, calcium, lithium etc.) that plays active ideal effect, relative noresidue relatively, surface of the work after soldering, be greatly improved more in the past, but the surface effect that same workpiece is issued in deep-etching, the fluoride that covers surface of the work after soldering is because of airborne oxygen and water molecules, the very fast patina that can occur " green " again, glassy residue are still wanted can clean after the pickling.
Summary of the invention
Main purpose of the present invention is exactly the problems and shortcomings at above existence, a kind of pickling scaling powder and preparation method thereof of exempting from is provided, this exempts from that the pickling scaling powder is easy to use, film-formation result good, corrosion phenomenon can not appear in noresidue after the soldering, soldering work piece, brazing cost reduces, environmental protection, the product purity height that its preparation method is easy, obtain.
It is to achieve these goals, of the present invention that a kind of to exempt from the technical scheme that the pickling scaling powder adopts as follows:
This exempts from the pickling scaling powder, is characterized in, comprises trimethylborate (Trimethyl borate).
Described trimethylborate content is 37%～47% (weight).
Described trimethylborate is 40% (weight).
The present invention also provides a kind of above-mentioned method of exempting from the pickling scaling powder for preparing, be characterized in that boric acid and methyl alcohol are at 45 ℃～50 ℃ of temperature, pressure 1Pa～1.2Pa, potassium permanganate is to react completely under the condition of catalyst, and suction filtration and washing obtain the described pickling scaling powder of exempting to neutral.
Also comprise step: suitably dry the described pickling scaling powder of exempting from.
The described pickling scaling powder of exempting from was 100 ℃ of bakings 2 hours.
Beneficial effect of the present invention is as follows:
1. preparation of the present invention adopts boric acid and methyl alcohol to react acquisition under relatively mild condition, and the preparation method is easy, the product purity height of acquisition.
2. the present invention adopts trimethylborate as scaling powder, substitute the GB102 type brazing flux of original fluoride, it is the scaling powder of a new generation, adopt directly spraying or spary mode to make scaling powder act on surface of the work, easy to use, rely on its excellent film-formation result to form at surface of the work and prevent oxide-film, really reached noresidue after the soldering, workpiece still corrosion phenomenon can not occur under the deep-etching condition.
3. adopt the workpiece of soldering of the present invention not need acid cleaning process, reduced technological process, production cost reduces greatly, has reduced to greatest extent the dependence of acid and the processing of spent acid, and strong promotion has been accomplished in the protection of environment.
4. because the present invention has environmental-protection function, played the important function of taking over from the past and setting a new course for the future in development and application from now on, driven whole brazing flux at present and manufactured exploitation and the application of industry the novel environment friendly brazing flux for the soldering industry.
The specific embodiment
The present invention adopts boric acid and methyl alcohol to react completely under appropriate condition, and suction filtration and washing are to the described pickling scaling powder of exempting from of neutral acquisition, and the described pickling scaling powder of exempting from is again in 100 ℃ of bakings about 2 hours.
The chemical equation that wherein relates to is as follows:
H
3BO
3+ 3CH
3OH=(CH
3O)
3B+3H
2O, 45 ℃～50 ℃ of temperature, pressure 1Pa～1.2pa, potassium permanganate are catalyst;
The pickling scaling powder of exempting from that obtains is stained with the examination use, with hairbrush or other tool usings of being convenient to operate, scaling powder directly is applied in surface of the work gets final product.
Content for a better understanding of the present invention is described further below in conjunction with specific embodiment.
Embodiment 1
Take by weighing 120g boric acid (boric acid 〉=99%, Shanghai minghuang enterprise development Co., Ltd.), add methyl alcohol 23.5g (methyl alcohol 〉=97%), agitating heating, temperature is controlled at 45 ℃～50 ℃, pressure is controlled at 1Pa～1.2Pa, reacted 1.5 hours, and took by weighing again after 25g potassium permanganate dissolves fully with 200g water, add in the above-mentioned reactant liquor, continue to stir half an hour, suction filtration also washs and neutrally must exempt from pickling scaling powder 75g, and baking is 2 hours in 100 ℃ of circulation baking ovens, and 72.35g weighs, content is 99%, and yield is 72.0%.
Embodiment 2
With embodiment 1 preparation contain 99% trimethylborate exempt from the pickling scaling powder with 94% methyl alcohol be mixed with contain 10%, 37%, 40%, 47% trimethylborate respectively exempt from the pickling scaling powder.
With hairbrush be stained with respectively examination embodiment 1 preparation exempt from pickling scaling powder and above-mentioned various preparations exempt from the pickling scaling powder, respectively they are applied in copper workpiece air-conditioning stop valve and high body valve surface, film-formation result is good after the soldering, noresidue, in usual condition, 24 hours, corrosion phenomenon did not appear in workpiece.7-30 days, corrosion phenomenon did not still appear in workpiece.
Comparative Examples 1
To be applied in copper workpiece air-conditioning stop valve and high body valve surface after the dissolving of the GB102 type brazing flux water of fluoride, film-formation result is bad after the soldering, and as seen directly perceived have residually, and in usual condition, 24 hours, corrosion phenomenon appearred in workpiece.7-30 days, the large tracts of land corrosion phenomenon appearred in workpiece.
By comparing embodiment 2 and Comparative Examples 1, the pickling scaling powder of exempting from of the present invention, may be because in its preparation method, activation temperature increases on the basis of common scaling powder to some extent, its film-formation result is better than common scaling powder effect, utilizes the mode of spraying, spary to make solder flux act on working surface, relies on its own excellent film-formation result to form at surface of the work and prevents oxide-film, really reached noresidue after the soldering, workpiece still corrosion phenomenon can not occur under the deep-etching condition.And common scaling powder causes its film-formation result not as exempting from the pickling scaling powder because of the difference of its compound method and batching, and after the use, it is residual that surface of the work leaves, and be easy to occur corrosion phenomenon, needing to cause acid cleaning process.
In sum, of the present inventionly exempt from that the pickling scaling powder is easy to use, film-formation result good, corrosion phenomenon can not appear in noresidue after the soldering, soldering work piece, brazing cost reduces, environmental protection, the product purity height that its preparation method is easy, obtain.
Need to prove, all quote in this application as a reference, just quoted as a reference separately as each piece document at all documents that the present invention mentions.Should understand in addition, above-described is specific embodiments of the invention and the know-why used, after having read above-mentioned instruction content of the present invention, those skilled in the art can make various changes or modifications and not deviate from spirit of the present invention and scope the present invention, and these equivalent form of values fall within the scope of the invention equally.
Claims (6)
1. exempt from the pickling scaling powder for one kind, it is characterized in that, comprise trimethylborate.
2. the pickling scaling powder of exempting from as claimed in claim 1 is characterized in that, described trimethylborate content is 37%～47% (weight).
3. the pickling scaling powder of exempting from as claimed in claim 2 is characterized in that, described trimethylborate is 40% (weight).
4. one kind prepares the method for exempting from the pickling scaling powder as claimed in claim 1, it is characterized in that boric acid and methyl alcohol are at 45 ℃～50 ℃ of temperature, pressure 1Pa～1.2Pa, potassium permanganate is to react completely under the condition of catalyst, and suction filtration and washing obtain the described pickling scaling powder of exempting to neutral.
5. method as claimed in claim 4 is characterized in that, also comprises step: suitably dry the described pickling scaling powder of exempting from.
6. method as claimed in claim 5 is characterized in that, the described pickling scaling powder of exempting from was 100 ℃ of bakings 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100463592A CN101396776A (en) | 2007-09-25 | 2007-09-25 | Acid-cleaning avoid welding flux and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100463592A CN101396776A (en) | 2007-09-25 | 2007-09-25 | Acid-cleaning avoid welding flux and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101396776A true CN101396776A (en) | 2009-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100463592A Pending CN101396776A (en) | 2007-09-25 | 2007-09-25 | Acid-cleaning avoid welding flux and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554511A (en) * | 2011-12-22 | 2012-07-11 | 肇庆理士电源技术有限公司 | Novel soldering flux |
| CN107175423A (en) * | 2017-07-04 | 2017-09-19 | 合肥安力电力工程有限公司 | A kind of scaling powder |
| CN107855682A (en) * | 2017-11-09 | 2018-03-30 | 湖州高恒电梯配件有限公司 | A kind of built-up welding scaling powder |
| CN108890172A (en) * | 2018-07-12 | 2018-11-27 | 浙江新锐焊接科技股份有限公司 | It is a kind of be halogen-free exempt from pickling fluxing agent and preparation method thereof |
| CN114682951A (en) * | 2020-12-30 | 2022-07-01 | 廊坊开发区环星焊接材料有限公司 | No-clean scaling powder for low-silver solder welding brass |
-
2007
- 2007-09-25 CN CNA2007100463592A patent/CN101396776A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554511A (en) * | 2011-12-22 | 2012-07-11 | 肇庆理士电源技术有限公司 | Novel soldering flux |
| CN107175423A (en) * | 2017-07-04 | 2017-09-19 | 合肥安力电力工程有限公司 | A kind of scaling powder |
| CN107855682A (en) * | 2017-11-09 | 2018-03-30 | 湖州高恒电梯配件有限公司 | A kind of built-up welding scaling powder |
| CN108890172A (en) * | 2018-07-12 | 2018-11-27 | 浙江新锐焊接科技股份有限公司 | It is a kind of be halogen-free exempt from pickling fluxing agent and preparation method thereof |
| CN114682951A (en) * | 2020-12-30 | 2022-07-01 | 廊坊开发区环星焊接材料有限公司 | No-clean scaling powder for low-silver solder welding brass |
| CN114682951B (en) * | 2020-12-30 | 2024-03-22 | 廊坊开发区环星焊接材料有限公司 | Cleaning-free soldering flux for soldering brass by low-silver solder |
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Open date: 20090401 |