CN112620611A - Lead-acid storage battery casting flux and preparation method thereof - Google Patents
Lead-acid storage battery casting flux and preparation method thereof Download PDFInfo
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- CN112620611A CN112620611A CN202011496205.5A CN202011496205A CN112620611A CN 112620611 A CN112620611 A CN 112620611A CN 202011496205 A CN202011496205 A CN 202011496205A CN 112620611 A CN112620611 A CN 112620611A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/04—Casting in, on, or around objects which form part of the product for joining parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
- B22D25/04—Casting metal electric battery plates or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Cell Separators (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a lead-acid storage battery casting flux which is prepared from the following raw materials in parts by weight: 2-5 parts of film forming agent, 0.8-2 parts of surfactant, 0.5-1.5 parts of activating agent, 4-6 parts of absolute ethyl alcohol, 4-6 parts of hydrazine bromide, 6-10 parts of deionized water and 65-80 parts of methanol. According to the invention, through the scientific and reasonable proportion, the three combinations of rosin, polymerized rosin and modified rosin are selected, so that crystals can be separated out in the using process, the welding quality is improved, the improvement of the wettability is facilitated, the expansion rate can be effectively improved, the welding spots are full, and the number of surface pores is remarkably small; two activating agents with different activating temperatures are selected, and the addition of the activating agents can further improve the metal oxide removing capability of the cast welding agent, so that the welding activity is improved, the welding spots are regular and full, the bubbles are reduced, and the expansion rate is obviously improved.
Description
Technical Field
The invention relates to the technical field of storage battery manufacturing, in particular to a lead-acid storage battery and a preparation method thereof.
Background
The lead-acid storage battery is developed more and more mature, the production efficiency is gradually improved, wherein the important factor for improving the production efficiency is that the original manual welding of the pole plate is changed into the automatic mechanical cast welding (COS), the flame temperature of the manual welding is higher and can reach 1300 ℃ at most, and the requirement on the surface cleanliness of the pole lug is not high due to the higher flame temperature; after the machine is adopted for automatic cast welding, the influence of the surface cleanliness of the lug on the welding quality is extremely important, and the poor mass welding phenomenon easily occurs due to the unclean surface of the lug, so that the great quality loss is caused.
The traditional COS casting flux adopts organic casting flux or phosphoric acid + water casting flux, and the two casting fluxes have respective defects: the organic casting flux is expensive (the price of one kilogram in the market is about 90 yuan, and the average cost of each battery is about 0.2 yuan), and a large amount of smoke is generated in the welding process to pollute the environment; sparks appear in the welding process of the phosphoric acid and water cast welding agent, potential safety hazards exist, and welding interface air holes are large.
Disclosure of Invention
The invention provides a lead-acid storage battery and a preparation method thereof, which can effectively reduce the number of bubbles and the volume of the bubbles.
The invention adopts the following technical scheme for solving the technical problems:
the lead-acid storage battery casting flux is prepared from the following raw materials in parts by weight: 2-5 parts of film forming agent, 0.8-2 parts of surfactant, 0.5-1.5 parts of activating agent, 4-6 parts of absolute ethyl alcohol, 4-6 parts of hydrazine bromide, 6-10 parts of deionized water and 65-80 parts of methanol.
As a preferable scheme, the lead-acid storage battery casting flux is prepared from the following raw materials in parts by weight: 2-4 parts of film forming agent, 1-2 parts of surfactant, 0.8-1.5 parts of activating agent, 4-5.5 parts of absolute ethyl alcohol, 4.5-6 parts of hydrazine bromide, 6-9 parts of deionized water and 70-80 parts of methanol.
As a most preferable scheme, the lead-acid storage battery casting flux is prepared from the following raw materials in parts by weight: 3 parts of film forming agent, 1.8 parts of surfactant, 1.2 parts of activating agent, 5 parts of absolute ethyl alcohol, 5.5 parts of hydrazine bromide, 8 parts of deionized water and 75 parts of methanol.
Preferably, the film-forming agent is one or more of rosin, disproportionated rosin, modified rosin, hydrogenated rosin and polymerized rosin.
As a preferred scheme, the film forming agent is prepared from the following components in a weight ratio of 1: 0.5-2: 0.5-2 parts of rosin, polymerized rosin and modified rosin.
The inventor of the present invention found in a great deal of research that rosin itself can ionize H+Can effectively remove surface oxides, and the rosin in a molten state has good performanceThe fluidity and the heat conductivity can promote the heat transfer in the welding process, avoid the occurrence of poor welding and air holes, but the single rosin can actively precipitate crystals in the use process, and the welding quality can be influenced.
The inventor of the application surprisingly discovers in research that by selecting three combinations of rosin, polymerized rosin and modified rosin, crystal can be separated out in the using process, the welding quality is improved, the wettability is improved, the expansion rate can be effectively improved, welding spots are full, and the number of surface pores is remarkably small.
As a preferred scheme, the preparation method of the modified rosin comprises the following steps:
adding 80-150 parts of rosin into a reaction kettle, adding 5-12 parts of nut oil, heating to 170-180 ℃, keeping the temperature for 80-120 min, adding 15-25 parts of itaconic acid and 1-4 parts of hexadecyl trimethyl ammonium bromide into the reaction kettle, heating to 220-250 ℃, reacting for 2.5-3.5 h, cooling and discharging to obtain the modified rosin.
The acid value of the modified rosin prepared by the method is 120 +/-2 mgKOH/g, so that the cast-welding capability of the modified rosin is further enhanced, the film-forming property of the rosin in the cast-welding agent can be more effectively improved, and meanwhile, the function of a certain surfactant can be exerted, the surface tension is reduced, the wettability is improved, and the expansion rate is increased.
As a preferred scheme, the reaction time is 2.8 h.
As a preferred scheme, the activating agent is adipic acid and diethylamine according to the weight ratio of 1: 0.5 to 2.
Only one activator has one activation temperature, and only the activator can be activated at the activation temperature, so that in a short time, one activator cannot ensure the activity of the whole welding process, and different activator combinations are needed to ensure the welding quality.
The activator is two activators with different activation temperatures, and the addition of the activator can further improve the capability of the cast solder for removing metal oxides, so that the welding activity is improved, the welding spot is regular and full, the bubbles are reduced, and the expansion rate is obviously improved.
As a preferable scheme, the surfactant is dodecyl dimethyl betaine and polyethylene glycol monostearate, and the weight ratio of the dodecyl dimethyl betaine to the polyethylene glycol monostearate is 1: 0.5 to 2.
According to the invention, dodecyl dimethyl betaine (amphoteric surfactant) and polyethylene glycol monostearate (nonionic surfactant) are selected as surfactants, and the dodecyl dimethyl betaine and the polyethylene glycol monostearate are compounded, so that the synergistic effect is achieved, the surface tension can be reduced, the cast flux can be quickly wetted, the expansion rate is obviously improved, the uniformity of the cast flux can be improved, the welding quality is improved, and welding bubbles are reduced.
The invention also provides a preparation method of the lead-acid storage battery casting flux, which comprises the following steps:
(1) adding a film forming agent into absolute ethyl alcohol, heating to 150-180 ℃, and uniformly stirring;
(2) and sequentially adding a surfactant, an activating agent, hydrazine bromide, deionized water and methanol, and uniformly stirring to obtain the lead-acid storage battery casting flux.
The invention has the beneficial effects that: (1) the lead-acid storage battery cast-weld agent can effectively improve the cast-weld quality, reduce the number of bubbles, reduce the volume of the bubbles and improve the expansion rate; (2) according to the invention, through the scientific and reasonable proportion, the three combinations of rosin, polymerized rosin and modified rosin are selected, so that crystals can be separated out in the using process, the welding quality is improved, the improvement of the wettability is facilitated, the expansion rate can be effectively improved, the welding spots are full, and the number of surface pores is remarkably small; the acid value of the modified rosin is 120 +/-2 mgKOH/g, so that the cast welding capacity of the modified rosin is further enhanced, the film forming property of the rosin in a cast welding agent can be more effectively improved, meanwhile, the function of a certain surfactant can be exerted, the surface tension is reduced, the wettability is improved, and the expansion rate is improved; (3) two activating agents with different activation temperatures are selected, and the addition of the activating agents can further improve the metal oxide removing capability of the cast welding agent, so that the welding activity is improved, welding spots are regular and full, bubbles are reduced, and the expansion rate is obviously improved; dodecyl dimethyl betaine (amphoteric surfactant) and polyethylene glycol monostearate (nonionic surfactant) are selected as surfactants, and the dodecyl dimethyl betaine and the polyethylene glycol monostearate are compounded to have a synergistic effect, so that the surface tension can be reduced, the cast welding agent can be quickly wetted, the expansion rate is obviously improved, the uniformity of the cast welding agent can be improved, the welding quality is improved, and welding bubbles are reduced; (4) the lead-acid storage battery casting flux disclosed by the invention can eliminate an oxide layer on the surface of the lug, avoid reoxidation of the lug, better fuse the lug and a lead solution, and improve CCA, and is low in cost, good in effect and suitable for popularization and application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless otherwise stated, "parts" in the present invention are parts by weight.
The rosin is purchased from chemical industry and industry Limited company of Foshan Baolin under the brand BL-X.
The polymerized rosin is purchased from chemical industry and industry Co., Ltd, of the Foshan Baolin, under the brand name BS-113.
Example 1
The lead-acid storage battery casting flux is prepared from the following raw materials in parts by weight: 3 parts of film forming agent, 1.8 parts of surfactant, 1.2 parts of activating agent, 5 parts of absolute ethyl alcohol, 5.5 parts of hydrazine bromide, 8 parts of deionized water and 75 parts of methanol.
The film forming agent is prepared from the following components in percentage by weight of 1: 0.8: 1.2 of rosin, polymerized rosin and modified rosin.
The preparation method of the modified rosin comprises the following steps:
adding 120 parts of rosin into a reaction kettle, adding 8 parts of nut oil, heating to 175 ℃, keeping the temperature for 100min, adding 20 parts of itaconic acid and 2.5 parts of hexadecyl trimethyl ammonium bromide into the reaction kettle, heating to 240 ℃, reacting for 2.8h, cooling and discharging to obtain the modified rosin.
The activating agent is adipic acid and diethylamine according to the weight ratio of 1: 1.
The surfactant is dodecyl dimethyl betaine and polyethylene glycol monostearate according to a weight ratio of 1: 1.
The preparation method of the lead-acid storage battery casting flux comprises the following steps:
(1) adding the film forming agent into absolute ethyl alcohol, heating to 170 ℃, and uniformly stirring;
(2) and sequentially adding a surfactant, an activating agent, hydrazine bromide, deionized water and methanol, and uniformly stirring to obtain the lead-acid storage battery casting flux.
Example 2
The lead-acid storage battery casting flux is prepared from the following raw materials in parts by weight: 2 parts of film forming agent, 0.8 part of surfactant, 0.5 part of activating agent, 4 parts of absolute ethyl alcohol, 4 parts of hydrazine bromide, 6 parts of deionized water and 65 parts of methanol.
The film forming agent is prepared from the following components in percentage by weight of 1: 0.8: 1.2 of rosin, polymerized rosin and modified rosin.
The preparation method of the modified rosin comprises the following steps:
adding 120 parts of rosin into a reaction kettle, adding 8 parts of nut oil, heating to 175 ℃, keeping the temperature for 100min, adding 20 parts of itaconic acid and 2.5 parts of hexadecyl trimethyl ammonium bromide into the reaction kettle, heating to 240 ℃, reacting for 2.8h, cooling and discharging to obtain the modified rosin.
The activating agent is adipic acid and diethylamine according to the weight ratio of 1: 1.
The surfactant is dodecyl dimethyl betaine and polyethylene glycol monostearate according to a weight ratio of 1: 1.
The preparation method of the lead-acid storage battery casting flux comprises the following steps:
(1) adding the film forming agent into absolute ethyl alcohol, heating to 170 ℃, and uniformly stirring;
(2) and sequentially adding a surfactant, an activating agent, hydrazine bromide, deionized water and methanol, and uniformly stirring to obtain the lead-acid storage battery casting flux.
Example 3
The lead-acid storage battery casting flux is prepared from the following raw materials in parts by weight: 4 parts of film forming agent, 2 parts of surfactant, 1.5 parts of activating agent, 6 parts of absolute ethyl alcohol, 6 parts of hydrazine bromide, 10 parts of deionized water and 80 parts of methanol.
The film forming agent is prepared from the following components in percentage by weight of 1: 0.8: 1.2 of rosin, polymerized rosin and modified rosin.
The preparation method of the modified rosin comprises the following steps:
adding 120 parts of rosin into a reaction kettle, adding 8 parts of nut oil, heating to 175 ℃, keeping the temperature for 100min, adding 20 parts of itaconic acid and 2.5 parts of hexadecyl trimethyl ammonium bromide into the reaction kettle, heating to 240 ℃, reacting for 2.8h, cooling and discharging to obtain the modified rosin.
The activating agent is adipic acid and diethylamine according to the weight ratio of 1: 1.
The surfactant is dodecyl dimethyl betaine and polyethylene glycol monostearate according to a weight ratio of 1: 1.
The preparation method of the lead-acid storage battery casting flux comprises the following steps:
(1) adding the film forming agent into absolute ethyl alcohol, heating to 170 ℃, and uniformly stirring;
(2) and sequentially adding a surfactant, an activating agent, hydrazine bromide, deionized water and methanol, and uniformly stirring to obtain the lead-acid storage battery casting flux.
Example 4
The lead-acid storage battery casting flux is prepared from the following raw materials in parts by weight: 3.5 parts of film forming agent, 1 part of surfactant, 0.6 part of activating agent, 5 parts of absolute ethyl alcohol, 5.5 parts of hydrazine bromide, 9 parts of deionized water and 75.4 parts of methanol.
The film forming agent is prepared from the following components in percentage by weight of 1: 0.8: 1.2 of rosin, polymerized rosin and modified rosin.
The preparation method of the modified rosin comprises the following steps:
adding 120 parts of rosin into a reaction kettle, adding 8 parts of nut oil, heating to 175 ℃, keeping the temperature for 100min, adding 20 parts of itaconic acid and 2.5 parts of hexadecyl trimethyl ammonium bromide into the reaction kettle, heating to 240 ℃, reacting for 2.8h, cooling and discharging to obtain the modified rosin.
The activating agent is adipic acid and diethylamine according to the weight ratio of 1: 1.
The surfactant is dodecyl dimethyl betaine and polyethylene glycol monostearate according to a weight ratio of 1: 1.
The preparation method of the lead-acid storage battery casting flux comprises the following steps:
(1) adding the film forming agent into absolute ethyl alcohol, heating to 170 ℃, and uniformly stirring;
(2) and sequentially adding a surfactant, an activating agent, hydrazine bromide, deionized water and methanol, and uniformly stirring to obtain the lead-acid storage battery casting flux.
Comparative example 1
Comparative example 1 differs from example 1 in that the activator described in comparative example 1 is adipic acid alone, all else being the same.
Comparative example 2
Comparative example 2 differs from example 1 in that the surfactant described in comparative example 2 is a single dodecyl dimethyl betaine, all else being identical.
Comparative example 3
Comparative example 3 differs from example 1 in that the film-forming agent of comparative example 3 is a single modified rosin, all other things being equal.
Comparative example 4
Comparative example 4 is different from example 1 in that the modified rosin prepared in the present invention was replaced with a commercially available modified rosin in the film-forming agent described in comparative example 4, and the rest were the same, and the modified rosin described in this comparative example was purchased from chemical industry ltd of the shorea forest under the designation BM-150.
Comparative example 5
Comparative example 5 is different from example 1 in that comparative example 5 describes a modified rosin prepared by a method different from example 1, and the other steps are the same.
The preparation method of the modified rosin comprises the following steps:
adding 120 parts of rosin into a reaction kettle, adding 8 parts of tung oil, heating to 175 ℃, keeping the temperature for 100min, adding 20 parts of maleic acid and 2.5 parts of hexadecyl trimethyl ammonium bromide into the reaction kettle, heating to 240 ℃, reacting for 2.8h, cooling and discharging to obtain the modified rosin.
To further demonstrate the effect of the present invention, the following test methods were provided:
1. the test (the number and the number of the grid pores) is carried out by respectively comparing the casting welding agents described in examples 1-4 and comparative examples 1-5 with the starting maintenance-free lead-acid storage battery 6QW-100 serving as an experimental sample, the test scheme of the expansion ratio is carried out according to the method described in SJ/T11389-.
Table 1 results of performance testing
As can be seen from Table 1, the lead-acid battery casting flux of the invention can reduce the number of grid pores and the pore volume, and can also improve the expansion rate.
Compared with the examples 1 to 4, the proportion of the lead-acid storage battery casting flux with different proportions can influence the number, volume and expansion rate of grid pores, wherein the example 1 is the optimal proportion.
Comparing example 1 with comparative example 1, it can be seen that when the activator is different from the present invention, the number of pores of the grid is large, the volume is large, and the expansion rate is reduced, and therefore, by selecting two activators with different activation temperatures, the addition of the activator can further improve the capability of the welding flux for removing metal oxides, so that the welding activity is improved, the welding spot is regular and full, the air bubbles are reduced, and the expansion rate is obviously improved.
It can be seen from the comparison of example 1 and comparative example 2 that when the activator is different from the present invention, the grid has a large number of pores and a large volume, and the expansion rate is reduced, and it can be seen that dodecyl dimethyl betaine (amphoteric surfactant) and polyethylene glycol monostearate (nonionic surfactant) are used as the surfactants, and the two are compounded to have a synergistic effect, which can reduce the surface tension, quickly wet the cast-weld agent, thereby significantly increasing the expansion rate, and simultaneously improving the uniformity of the cast-weld agent, improving the welding quality, and reducing welding bubbles.
Comparing example 1 with comparative examples 3-5, it can be seen that the film-forming agent of the present invention can significantly reduce the number of pores, reduce the volume of pores, and improve the expansion rate, when the modified rosin is replaced or the preparation method is different from the present invention, the pore volume, the number of pores, and the expansion rate can be significantly reduced, and when the film-forming agent is a single modified rosin, it is further illustrated that by selecting a combination of rosin, polymerized rosin, and modified rosin, a crystal can be actively precipitated during use, the welding quality is improved, the wettability is improved, the expansion rate can be effectively improved, the welding spots are full, and the number of surface pores is significantly reduced.
In light of the foregoing description of preferred embodiments according to the invention, it is clear that many changes and modifications can be made by the person skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The lead-acid storage battery casting flux is characterized by being prepared from the following raw materials in parts by weight: 2-5 parts of film forming agent, 0.8-2 parts of surfactant, 0.5-1.5 parts of activating agent, 4-6 parts of absolute ethyl alcohol, 4-6 parts of hydrazine bromide, 6-10 parts of deionized water and 65-80 parts of methanol.
2. The lead-acid battery casting flux according to claim 1, characterized in that the lead-acid battery casting flux is prepared from the following raw materials in parts by weight: 2-4 parts of film forming agent, 1-2 parts of surfactant, 0.8-1.5 parts of activating agent, 4-5.5 parts of absolute ethyl alcohol, 4.5-6 parts of hydrazine bromide, 6-9 parts of deionized water and 70-80 parts of methanol.
3. The lead-acid battery casting flux according to claim 1, characterized in that the lead-acid battery casting flux is prepared from the following raw materials in parts by weight: 3 parts of film forming agent, 1.8 parts of surfactant, 1.2 parts of activating agent, 5 parts of absolute ethyl alcohol, 5.5 parts of hydrazine bromide, 8 parts of deionized water and 75 parts of methanol.
4. The cast flux for a lead-acid storage battery according to claim 1, wherein the film-forming agent is one or more of rosin, disproportionated rosin, modified rosin, hydrogenated rosin and polymerized rosin.
5. The cast flux for a lead-acid battery according to claim 1, characterized in that the film-forming agent consists of, by weight, 1: 0.5-2: 0.5-2 parts of rosin, polymerized rosin and modified rosin.
6. The lead-acid storage battery casting flux according to claim 5, characterized in that the preparation method of the modified rosin comprises the following steps:
adding 80-150 parts of rosin into a reaction kettle, adding 5-12 parts of nut oil, heating to 170-180 ℃, keeping the temperature for 80-120 min, adding 15-25 parts of itaconic acid and 1-4 parts of hexadecyl trimethyl ammonium bromide into the reaction kettle, heating to 220-250 ℃, reacting for 2.5-3.5 h, cooling and discharging to obtain the modified rosin.
7. The lead-acid battery casting flux according to claim 6, characterized in that the reaction time is 2.8 h.
8. The lead-acid battery casting flux according to claim 1, characterized in that the activator is adipic acid, diethylamine in a weight ratio of 1: 0.5 to 2.
9. The lead-acid storage battery casting flux according to claim 1, characterized in that the surfactant is dodecyl dimethyl betaine, polyethylene glycol monostearate according to a weight ratio of 1: 0.5 to 2.
10. The preparation method of the lead-acid storage battery casting flux according to any one of claims 1 to 9, characterized by comprising the following steps:
(1) adding a film forming agent into absolute ethyl alcohol, heating to 150-180 ℃, and uniformly stirring;
(2) and sequentially adding a surfactant, an activating agent, hydrazine bromide, deionized water and methanol, and uniformly stirring to obtain the lead-acid storage battery casting flux.
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| EP0443954A1 (en) * | 1990-02-23 | 1991-08-28 | COMPAGNIE EUROPEENNE D'ACCUMULATEURS, Société anonyme dite: | Soldering flux for lead battery accessories |
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| CN105921911A (en) * | 2016-05-31 | 2016-09-07 | 深圳市唯特偶新材料股份有限公司 | Soldering flux which generates few concaves after welding and is used for pre-formed soldering lug |
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