CN108422127B - Water-based soldering flux for lead-acid storage battery - Google Patents
Water-based soldering flux for lead-acid storage battery Download PDFInfo
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- CN108422127B CN108422127B CN201810198622.8A CN201810198622A CN108422127B CN 108422127 B CN108422127 B CN 108422127B CN 201810198622 A CN201810198622 A CN 201810198622A CN 108422127 B CN108422127 B CN 108422127B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a water-based soldering flux for a lead-acid storage battery, which relates to the technical field of lead-acid storage batteries and comprises the following raw materials in parts by weight: 0.05-0.15 part of ionic liquid, 1-3 parts of carbon black, 0.5-1.5 parts of graphene, 0.05-0.15 part of corrosion inhibitor, 0.5-1.5 parts of anionic surfactant, 5-8 parts of acetone, 5-8 parts of isopropanol and 40-72 parts of water. The soldering flux provided by the invention has the advantages of strong film removing capability, small corrosivity, easiness in dispersion on the surfaces of a welded parent metal and a solder, strong firmness between the solder and the welded parent metal, good electric conductivity of a welding spot and long service life of the welded parent metal, and the method for preparing the water-based soldering flux has the advantages of simple operation, reasonable method and uniform dispersion of raw materials.
Description
Technical Field
The invention relates to the technical field of lead-acid storage batteries, in particular to a water-based soldering flux for a lead-acid storage battery.
Background
The lead-acid storage battery becomes a chemical power supply widely used in the world after development and perfection for more than one hundred years, and has the advantages of good reversibility, stable voltage characteristic, long service life, wide application range, abundant raw materials, low manufacturing cost and the like. The method is mainly applied to various fields of national economy such as transportation, communication, electric power, railways, mines, ports, national defense, computers, scientific research and the like, and products indispensable to social production and operation activities and human life are produced.
The soldering flux is one of auxiliary materials required in the production process of the lead-acid storage battery, can dissolve an oxide film on the surface of a welded base material, prevents the surface of the welded base material from being reoxidized, and has the functions of reducing the surface tension of molten solder and protecting the welded base material. And therefore are used quite frequently in the production of lead-acid batteries. Although the types of the scaling powders are various, the type of the scaling powder mainly used in the field of lead-acid storage batteries is a water-based scaling powder, and inorganic acids such as sulfuric acid, phosphorous acid, metaphosphoric acid or phosphoric acid are generally used in the formula of the water-based scaling powder on the domestic market. Chinese patent No. CN 103264239A discloses a lead-acid storage battery plate flux, wherein the content of sulfuric acid accounts for 10-15%; chinese patent No. CN 104475712A discloses a soldering flux for cast welding of a lead-acid storage battery, wherein the content of phosphorous acid is 3-5%; chinese patent No. CN104139252A discloses a lead-acid storage battery soldering flux, wherein the content of phosphorous acid is 45-55%; chinese patent No. CN103706966A discloses a soldering flux for a bus bar of a lead-acid storage battery, wherein the content of metaphosphoric acid is 8-15%; chinese patent No. CN 105945452A discloses a lead-acid storage battery soldering flux and a preparation method and application thereof, wherein the content of phosphoric acid is 50-80%, inorganic acid is used in the above patents, although the film removing capability of the soldering flux containing the inorganic acid is enhanced, the corrosivity to a welded parent metal and a solder is larger, further the corrosion of the welded parent metal and the solder is caused, the service life of the contained parent metal is shortened, the solder is wasted, and the processing cost of welding is increased. Based on the statement, the invention provides the aqueous soldering flux for the lead-acid storage battery, which has good soldering effect and low corrosion performance.
Disclosure of Invention
The invention aims to solve the problems of poor film removing capability of a soldering flux, serious corrosion to a welded base material and a welding flux and welding processing cost increase in the prior art, and provides the water-based soldering flux for the lead-acid storage battery.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the water-based soldering flux for the lead-acid storage battery comprises the following raw materials in parts by weight: 0.05-0.15 part of ionic liquid, 1-3 parts of carbon black, 0.5-1.5 parts of graphene, 0.05-0.15 part of corrosion inhibitor, 0.5-1.5 parts of anionic surfactant, 5-8 parts of acetone, 5-8 parts of isopropanol and 40-72 parts of water.
Preferably, the aqueous soldering flux for the lead-acid storage battery comprises the following raw materials in parts by weight: 0.08-0.12 part of ionic liquid, 1.5-2.5 parts of carbon black, 0.8-1.2 parts of graphene, 0.05-0.15 part of corrosion inhibitor, 0.8-1.2 parts of anionic surfactant, 5-8 parts of acetone, 5-8 parts of isopropanol and 45-60 parts of water.
Preferably, the aqueous soldering flux for the lead-acid storage battery comprises the following raw materials in parts by weight: 0.1 part of ionic liquid, 2 parts of carbon black, 1 part of graphene, 0.1 part of corrosion inhibitor, 1 part of anionic surfactant, 6 parts of acetone, 6 parts of isopropanol and 55 parts of water.
Preferably, the ionic liquid is perfluorinated sulfimide functionalized protonated trimethylamine ethylene lactone.
Preferably, the specific surface area of the carbon black is 850-1000 m2The particle size is 10-15 nm, and the specific surface area of the graphene is 500-1000 m2Per g, purity>98wt％。
Preferably, the mass ratio of the carbon black to the graphene is 1-6: 1, and more preferably, the mass ratio of the carbon black to the graphene is 2: 1.
preferably, the anionic surfactant is formed by mixing polyacrylamide and sodium dodecyl benzene sulfonate or is formed by mixing polyacrylamide and sodium dodecyl sulfate, and the mass ratio of the polyacrylamide to the sodium dodecyl benzene sulfonate is 1: 2, the mass ratio of polyacrylamide to sodium dodecyl sulfate is 1: 2.
preferably, the purity of the acetone is more than 99%, the purity of the isopropanol is more than 98%, and the water is one of deionized water, ultrapure water and double distilled water.
The invention also provides a preparation method of the water-based soldering flux for the lead-acid storage battery, which comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, mixing acetone, isopropanol and water, uniformly mixing to obtain a mixed solvent, adding an anionic surfactant into the mixed solvent, performing ultrasonic treatment, adding an ionic liquid after complete dissolution, stirring, uniformly mixing, transferring to an ultrasonic instrument, sequentially adding a corrosion inhibitor, carbon black and graphene while performing ultrasonic treatment, and uniformly dispersing the corrosion inhibitor, the carbon black and the graphene.
The invention provides a strengthening activator for a lead-acid storage battery, which has the following advantages compared with the prior art:
the soldering flux provided by the invention is particularly suitable for the technical field of lead-acid storage batteries, the soldering flux takes the protonated trimethylamine ethylene lactone functionalized by perfluorosulfimide as an active substance for removing an oxidation film, the effect of removing the oxidation film is better than that of inorganic acid on the premise of not using corrosive inorganic acid, and carbon black and graphene uniformly dispersed in the soldering flux can ensure that a soldered point after welding has good conductivity without influencing the conductivity of a welded parent metal, can improve the dispersion speed of a corrosion inhibitor in the soldering flux on the welded parent metal and a solder, ensure that the corrosion inhibitor has excellent corrosion inhibition effect, protect the welded parent metal from corrosion, prolong the service life of the welded parent metal, and be matched with an anionic surfactant to be uniformly dispersed on the surfaces of the welded parent metal and the solder, reduce the surface tension of molten solder, and improve the firmness between the solder and the welded parent metal, thereby prolonging the service life of the welded parent metal; in addition, the invention also provides a method for preparing the water-based soldering flux for the lead-acid storage battery, which is simple to operate, reasonable in method and uniform in dispersion of the raw materials.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
In examples 1 to 17, sampling was performed according to 0.1 part of a corrosion inhibitor, 1 part of an anionic surfactant, 6 parts of acetone, 6 parts of isopropyl alcohol and 55 parts of water, then sampling was performed according to the corresponding parts by weight in table 1 on an ionic liquid, carbon black and graphene, and the preparation of the aqueous flux for lead-acid batteries was performed according to the preparation method of the aqueous flux provided by the present invention, specifically, the following operations were performed: s1, weighing the raw materials in parts by weight; s2, mixing acetone, isopropanol and water, uniformly mixing to obtain a mixed solvent, adding an anionic surfactant into the mixed solvent, performing ultrasonic treatment, adding an ionic liquid after complete dissolution, stirring, uniformly mixing, transferring to an ultrasonic instrument, sequentially adding a corrosion inhibitor, carbon black and graphene while performing ultrasonic treatment, and separating after the corrosion inhibitor, the carbon black and the graphene are uniformly dispersedThe sub-liquid is perfluorinated sulfimide functionalized protonated trimethylamine ethylene lactone, and the specific surface area of the carbon black is 850-1000 m2The particle size is 10-15 nm, and the specific surface area of the graphene is 500-1000 m2Per g, purity>98 wt%, the anionic surfactant is formed by mixing polyacrylamide and sodium dodecyl benzene sulfonate, and the mass ratio of the polyacrylamide to the sodium dodecyl benzene sulfonate is 1: 2, water is deionized water, and the performance of the water-based soldering flux prepared in the embodiment 1-17 is detected, and the result is shown in table 1.
Table 1:
| examples | Ionic liquids | Carbon black | Graphene | The spreading ratio% | Relative wetting Rate% |
| 1 | - | 1 | 0.5 | 64 | 37 |
| 2 | 0.05 | 1 | 0.5 | 86 | 47 |
| 3 | 0.1 | 1 | 0.5 | 94 | 53 |
| 4 | 0.15 | 1 | 0.5 | 94 | 53 |
| 5 | 0.2 | 1 | 0.5 | 79 | 41 |
| 6 | 0.1 | - | 0.5 | 61 | 35 |
| 7 | 0.1 | 1 | - | 62 | 37 |
| 8 | 0.1 | 1 | 1 | 82 | 45 |
| 9 | 0.1 | 1 | 1.5 | 81 | 44 |
| 10 | 0.1 | 1 | 2 | 72 | 36 |
| 11 | 0.1 | 2 | 0.5 | 86 | 49 |
| 12 | 0.1 | 2 | 1 | 94 | 55 |
| 13 | 0.1 | 2 | 1.5 | 84 | 48 |
| 14 | 0.1 | 3 | 0.5 | 84 | 47 |
| 15 | 0.1 | 3 | 1 | 89 | 51 |
| 16 | 0.1 | 3 | 1.5 | 93 | 53 |
| 17 | 0.1 | 3.5 | 0.5 | 75 | 38 |
The results of examples 1 to 5 in Table 1 show that: the expansion rate and the relative wetting rate of the aqueous soldering flux added with the ionic liquid are obviously higher than those of the aqueous soldering flux without the ionic liquid, which shows that the expansion rate and the relative wetting rate of the aqueous soldering flux can be obviously improved by adding the ionic liquid, the expansion rate and the relative wetting rate are gradually improved along with the increase of the added mass of the ionic liquid, and the expansion rate and the relative wetting rate are reduced along with the increase of the added mass of the ionic liquid after the added mass of the ionic liquid exceeds 0.2, which shows that the addition amount of the ionic liquid is controlled to be 0.05-0.15.
The results of examples 3, 7 to 17 in Table 1 show that: the dispersing effect that adds carbon black and graphite alkene simultaneously and reach is far better than adding carbon black or graphite alkene alone, and the quality ratio of carbon black and graphite alkene is great to the dispersion performance of aqueous soldering flux, and when the quality ratio of carbon black and graphite alkene is 6: 1 to 1: 1.5, the spreading rate and the relative wetting rate of the water-based soldering flux are higher, and when the mass ratio of the carbon black to the graphene is higher than 6: 1 or less than 1: 1.5, the spreading rate and the relative wetting rate of the water-based flux are obviously reduced, and the mass ratio of the carbon black to the graphene is 2: the spreading ratio and relative wetting ratio of the aqueous flux at 1 are the best.
Example 18
The anionic surfactant in example 12 was changed to a mass ratio of 1: 2 with sodium lauryl sulfate, under otherwise the same conditions as in example 12.
Comparative example
Aqueous surfactants were prepared as in example 12 by replacing the anionic surfactant in example 12 with polyacrylamide, sodium dodecylbenzenesulfonate and sodium dodecylsulfate, respectively, and the other conditions were the same as in example 12, and labeled as comparative example 1, comparative example 2 and comparative example 3, respectively.
The performance of the aqueous fluxes prepared in example 1 and example 18 and comparative example 1, comparative example 2 and comparative example 3 was tested, and the test results are shown in table 2.
Table 2:
| test items | Example 12 | Example 18 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| The spreading ratio% | 94 | 95 | 82 | 79 | 81 |
| Relative wetting Rate% | 55 | 54 | 41 | 42 | 43 |
The results of the tests in table 2 show that: the performance of example 12 is similar to that of example 18, and is obviously better than that of comparative example 1, comparative example 2 and comparative example 3, indicating that the synergistic effect can be achieved when the polyacrylamide and the sodium dodecyl benzene sulfonate are mixed together or the polyacrylamide and the sodium dodecyl sulfate are mixed together, and the achieved effect is better than that of the single use of the polyacrylamide, the sodium dodecyl benzene sulfonate or the sodium dodecyl sulfate.
Example 19
An aqueous activator was prepared in the same manner as in example 12 except that the deionized water in example 12 was replaced with ultrapure water in the same amount.
Example 20
An aqueous active agent was prepared by replacing the deionized water in example 12 with double distilled water in equal amounts and under the same conditions as in example 12.
The performance of the aqueous fluxes prepared in example 19 and example 20 was tested, and the test results are shown in table 3.
Table 3:
| test items | Example 19 | Example 20 |
| The spreading ratio% | 92 | 94 |
| Relative wet percentage% | 56 | 55 |
The results of the tests in table 3 show that: the performances of example 19 and example 20 are similar to those of example 12, and show that the wet results of the spreading rate and the relative wetting rate of the water-based fluxing obtained when the water in the water-based fluxing agent is any one of deionized water, ultrapure water and double distilled water are equivalent.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The water-based soldering flux for the lead-acid storage battery is characterized by comprising the following raw materials in parts by weight: 0.05-0.15 part of ionic liquid, 1-3 parts of carbon black, 0.5-1.5 parts of graphene, 0.05-0.15 part of corrosion inhibitor, 0.5-1.5 parts of anionic surfactant, 5-8 parts of acetone, 5-8 parts of isopropanol and 40-72 parts of water;
the ionic liquid is perfluorinated sulfimide functionalized protonated trimethylamine ethylene lactone.
2. The aqueous soldering flux for lead-acid batteries according to claim 1, which comprises the following raw materials in parts by weight: 0.08-0.12 part of ionic liquid, 1.5-2.5 parts of carbon black, 0.8-1.2 parts of graphene, 0.05-0.15 part of corrosion inhibitor, 0.8-1.2 parts of anionic surfactant, 5-8 parts of acetone, 5-8 parts of isopropanol and 45-60 parts of water.
3. The aqueous soldering flux for lead-acid batteries according to claim 1, which comprises the following raw materials in parts by weight: 0.1 part of ionic liquid, 2 parts of carbon black, 1 part of graphene, 0.1 part of corrosion inhibitor, 1 part of anionic surfactant, 6 parts of acetone, 6 parts of isopropanol and 55 parts of water.
4. The aqueous flux for lead-acid batteries according to claim 1, wherein the carbon black has a specific surface area of 850 to 1000m2The particle size is 10-15 nm, and the specific surface area of the graphene is 500-1000 m2Per g, purity>98wt％。
5. The aqueous flux for lead-acid batteries according to claim 1, wherein the mass ratio of the carbon black to the graphene is 1-6: 1.
6. the aqueous flux for lead-acid batteries according to claim 1, wherein the anionic surfactant is a mixture of polyacrylamide and sodium dodecylbenzenesulfonate or a mixture of polyacrylamide and sodium dodecylbenzenesulfonate, and the mass ratio of polyacrylamide to sodium dodecylbenzenesulfonate is 1: 2, the mass ratio of polyacrylamide to sodium dodecyl sulfate is 1: 2.
7. the aqueous flux for lead-acid batteries according to claim 1, wherein the purity of acetone is > 99%, the purity of isopropanol is > 98%, and the water is one of deionized water, ultrapure water and double distilled water.
8. The aqueous flux for lead-acid batteries according to claim 1,
the water-based soldering flux for the lead-acid storage battery is prepared by the following steps:
s1, weighing the raw materials in parts by weight;
s2, mixing acetone, isopropanol and water, uniformly mixing to obtain a mixed solvent, adding an anionic surfactant into the mixed solvent, performing ultrasonic treatment, adding an ionic liquid after complete dissolution, stirring, uniformly mixing, transferring to an ultrasonic instrument, sequentially adding a corrosion inhibitor, carbon black and graphene while performing ultrasonic treatment, and uniformly dispersing the corrosion inhibitor, the carbon black and the graphene.
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| CN109570825B (en) * | 2018-11-22 | 2021-07-13 | 东莞市绿志岛金属有限公司 | Low-temperature halogen-free lead-free soldering paste and preparation method thereof |
| CN110666398B (en) * | 2019-10-15 | 2021-07-16 | 西安石油大学 | Welding auxiliary active agent and projection welding method for improving welding penetration of nut |
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| JP2780536B2 (en) * | 1991-09-27 | 1998-07-30 | 新神戸電機株式会社 | Flux for lead alloy welding |
| CN100457375C (en) * | 2007-08-11 | 2009-02-04 | 厦门大学 | Cleaning-free water base type scaling powder capable of restraining welding point interface compound growth |
| CN104139252B (en) * | 2014-06-24 | 2016-03-02 | 超威电源有限公司 | A kind of lead-acid accumulator scaling powder |
| KR101925482B1 (en) * | 2014-11-20 | 2018-12-05 | 샌트랄 글래스 컴퍼니 리미티드 | Method for producing (fluorosulfonyl)perfluoroalkanesulfonylimide salt |
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