MXPA06006449A - Fluxing agent - Google Patents
Fluxing agentInfo
- Publication number
- MXPA06006449A MXPA06006449A MXPA/A/2006/006449A MXPA06006449A MXPA06006449A MX PA06006449 A MXPA06006449 A MX PA06006449A MX PA06006449 A MXPA06006449 A MX PA06006449A MX PA06006449 A MXPA06006449 A MX PA06006449A
- Authority
- MX
- Mexico
- Prior art keywords
- flux
- water
- polyvinyl alcohol
- preparation
- soluble polymer
- Prior art date
Links
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 33
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 31
- 238000002360 preparation method Methods 0.000 claims abstract description 24
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 17
- 150000001298 alcohols Chemical class 0.000 claims abstract description 7
- 239000008187 granular material Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 5
- 229910001515 alkali metal fluoride Inorganic materials 0.000 claims abstract description 3
- 230000004907 flux Effects 0.000 claims description 69
- 238000003466 welding Methods 0.000 claims description 23
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 235000011837 pasties Nutrition 0.000 claims description 4
- -1 for example Substances 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000011230 binding agent Substances 0.000 claims 1
- 239000006185 dispersion Substances 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 238000009463 water soluble packaging Methods 0.000 abstract 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 18
- 239000000725 suspension Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 210000001772 Blood Platelets Anatomy 0.000 description 5
- NROKBHXJSPEDAR-UHFFFAOYSA-M Potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 239000007900 aqueous suspension Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000003906 humectant Substances 0.000 description 3
- 229910001512 metal fluoride Inorganic materials 0.000 description 3
- SMYKVLBUSSNXMV-UHFFFAOYSA-J aluminum;tetrahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-J 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable Effects 0.000 description 2
- 150000004673 fluoride salts Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 235000003270 potassium fluoride Nutrition 0.000 description 2
- 239000011698 potassium fluoride Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 206010059837 Adhesion Diseases 0.000 description 1
- 206010067484 Adverse reaction Diseases 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L Zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000003935 benzaldehydes Chemical class 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000002110 toxicologic Effects 0.000 description 1
- 231100000759 toxicological effect Toxicity 0.000 description 1
- 239000011124 type III (regular soda lime glass) Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Abstract
The invention relates to a fluxing agent or a fluxing agent preparation which contains a water-soluble polymer, preferably polyvinyl alcohol or polyvinyl alcohol derivatives, in addition to complex alkali metal fluorides. The water-soluble polymer can be contained in the fluxing agent preparation in the form of a granulate or powder or can be used as a water-soluble packaging for the fluxing agent or fluxing agent preparation.
Description
FUNDENT DESCRIPTION OF THE INVENTION
The invention relates to a flux for welding aluminum construction elements, as well as a method for the production of fluxes. Modules of aluminum or alloy components
- aluminum or in combination with components of other suitable materials, for example, copper, brass, iron or stainless steel can be produced by welding these components.
The techniques for welding these components are public knowledge. The components are joined together under heating with the help of a metal for welding and a flux. The metal for welding can be added separately or metal-coated components for welding can be used. Advantageously, fluxes based on complex metal fluorides are used, for example, fluorides of the complex alkali metals which release the solder components from oxidation adhesions. The flux is applied to the components to be bonded for this dry as paste or sprayed as an aqueous suspension or the components are immersed in the suspension. The term "flux" comprises ready-to-use compositions containing, in addition to the flux, eventually. additives The flux can consist, in this only of flux. As additives, there may be contained in the preparation of flux, for example, adhesion agents, dispersing agents, welding metal, pre-stages of welding metal, welding-forming materials or stabilizers. Fluxes based on complex metal fluorides can be, for example, fluoride aluminates of the
• alkali metals, alkali metal fluoride silicate, fluoride zincate of alkali metals. Being that other known fluxes are also appropriate. The fluoride compounds can be used as pure compounds or as a mixture of fluorine compounds. As already mentioned, the flux respectively the flux preparation is applied in dry form as a paste or in the form of an aqueous suspension on the construction elements to be joined. To prepare the suspension, the components of the mixture are suspended in water. It is possible that there are inconveniences due to the dust, due to the characteristics of the components, or dosing errors. For the production of a paste, the flux is mixed with additives and vehicles, for example organic mixtures, the viscosity of the preparation being controlled by the amount of vehicle. The object of the present invention is to provide a flux respectively a flux preparation that can be dosed more easily. It is intended to avoid the discomfort with dust during the production of the flux suspension, it is sought to improve the wettability of the constructive elements by welding with the flux and the • adhesion of the flux on the constructive elements. The objective is achieved inventively by a. flux respectively a flux preparation based on complex metal fluorides containing a water-soluble polymer, in particular polyvinyl alcohol or polyvinyl alcohol derivatives. The water-soluble polymer can be used as the coating material for the flux or the flux preparation or it can be introduced in the form of granulate or powder in the flux or the flux preparation. The water-soluble polymer can be used, for example as a water soluble package, in particular as a packaging sheet. Inventively the flux respectively the flux preparation contains the water soluble polymer in amounts of 0.005 to 10% by weight based on the total amount of the flux respectively of the flux preparation. In one embodiment of the invention, the flux is packaged together with the usual additives in a water soluble polymer sheet pouch, preferably a polyvinyl alcohol sheet pouch and introduced into the aqueous suspension. A sheet with a thickness of, for example 80 μm. Polyvinyl alcohol has been produced in industrial volumes for several decades. Thanks to their characteristics, polyvinyl alcohol (PVA), for example as a compaction or bonding agent, as an emulsion agent and as a protective colloid. Thanks to the high resistance of PVA against organic solvents, it is used in the production of hoses, membranes, gaskets and hollow bodies resistant to gasoline and solvents. PVA sheets occupy a special position between the wrapping and packaging materials, since they dissolve when introduced in water. A sheet of water soluble PVA therefore represents only a protection against contact respectively a dosing package. Its possible applications and the precautionary measures that must be adopted during the storage and transport of PVA packages are essentially due to its good solubility in water and the hygroscopic behavior of the sheet. The PVA sheet is an ideal packaging material for substances that must be applied in an aqueous solution. A whole series of products are already packaged in the PVA sheet, for example, detergents, cleaning agents or chemical substances for agriculture. Water soluble sheets can be produced from different types of polyvinyl alcohol that differ from each other by their degree of saponification and polymerization. In addition, the characteristics of the sheet can be influenced by the type and amount of added plasticizers. EP 283 180 discloses water-soluble films based on polyvinyl alcohols, viz. Vinyl alcohol-vinylacetate copolymers, which were partially acetalized with benzaldehyde derivatives. It has been found that the introduction of the water-soluble polymers as packing material in the flux suspension respectively in the form of granules in a pasty flux formulation has no unfavorable effects on the welding result. The amount and type of the water-soluble polymer employed depend on the type of flux respectively of flux preparation. In the case of a suspension, the volume of the suspension and the concentration of the flux in the suspension, in a pasty preparation, are essential, together with the volume, the desirable viscosity and the knowledge about the interaction with the vehicle substances. It has been found convenient to employ the water-soluble polymer in an amount of 0.005 to 10% by weight, preferably 0.1 to 5% by weight, in particular 0.5 to 2% by weight (based on the total amount). It was determined that the coating of the
• constructive elements with the flux becomes very uniform thanks to the addition of the water-soluble polymer. The wettability of the construction elements with the flux is improved. The flux adheres better in the construction elements. The discomfort due to dust during production of the preparation is reduced respectively no longer occurs. Dosing errors can be minimized or even eliminated, since it is possible to use specific packing sizes. It is also advantageous that the amount of humectant can be reduced thanks to the addition of water-soluble polymers. Wetting agents are usually surfactants. Without humectant, that is, without surfactant, the flux suspension was agglomerating on the aluminum surface (formation of droplets due to the cohesive force of the water). After drying, the flux was not distributed uniformly over the metal surface. The use of polyvinyl alcohol respectively of polyvinyl alcohol derivatives has the advantage of allowing the reduction of the surface tension of the water, so that in the most favorable case it is possible to dispense with an additional humectant. The polyvinyl alcohol respectively the polyvinyl alcohol derivative act as surfactants, are biodegradable and no toxicological effects of these substances are known. It has been detected that the PVA content should be kept as low as possible in case it is not possible to tolerate any adverse effect on the welding result. It turned out to be convenient to respect a polymer (co-packing) to flux ratio of 0.1 to 5% by weight, preferably 0.5 to 2% by weight (based on the total amount), so as not to adversely affect the welding characteristics. Overpacking of PVA can cause a coloration of the welding spot during the welding operation. A proportion of polymer at a suspension amount of 0.005 to 10% by weight (based on the total amount) has a favorable effect on the wettability characteristics respectively, the application of the construction elements with the flux. And a uniform coating, in turn, leads to better welding results. In another embodiment, the flux respectively the flux preparation are applied as a pasty formulation on the construction elements to be welded. In this case, the water-soluble polymer, preferably polyvinyl alcohol or polyvinyl alcohol derivatives in the form of granules or as a powder, are added to the flux preparation. It has been found that with an addition of 0.1 to 5% by weight, based on the total amount of the preparation, polyvinyl alcohol acts as a thickener in the flux paste. The adhesion properties of the flux paste containing the polyvinyl alcohol are also improved. The use of polyvinyl alcohol as a component of the flux formulations has the advantage, as already said, that the surfactants that are usually contained in the flux formulation can be substituted. Polyvinyl alcohol is compatible with the environment and does not cause adverse reactions with the components of the flux respectively the welding elements during the welding operation. The following examples will explain the invention without limiting it. Example 1: Production of a flux suspension. Demineralized water is prepared in a vessel.
Polyvinyl alcohol sheet type G 6102.090 from the company is dissolved under agitation. Nordenia Next, potassium fluoride aluminate (Nocolok) is added. The flux suspension consisted of: 18% potassium fluoride aluminate 2% polyvinyl alcohol 80% demineralized water Example 2: Welding tests Aluminum plates, unilaterally welded and uncoated, measuring 25 x 25 x 0.4 - 1 mm, it they immersed for about 30 seconds in the homogenized suspension of example 1 and were then dried. The flux distribution in the platelets was homogeneous. The adhesion of the flux on the surface was good and resistant to cleaning. In each case, 6 welds were made with aluminum plates coated with solder and 6 welds with uncoated aluminum platelets. All platelets were welded with aluminum angles. In the uncoated platelets, a piece of AISi 12 weld with a length of 3 to 4 mm was placed at the end of the angle. The welding tests were carried out in a type III glass welding furnace, Welding conditions: permanent nitrogen current 11 l / min heating rate 30 ° C up to a temperature of 605 ° C maintenance period at 605 ° C 2 min. Cooling period 30 ° C / min
Result: All the platelets were welded with the angles optimally.
Claims (7)
1. Flux based on complex alkali metal fluorides, characterized in that the flux contains a water-soluble polymer. Flux according to claim 1, characterized in that it contains additives such as, for example, binders or dispersion substances. Flux according to claim 1, characterized in that the flux contains polyvinyl alcohol and / or polyvinyl alcohol derivatives in water-soluble polymer in amounts of 0.005 to 10% by weight (based on the flux preparation). 4. Method for the production of fluxes, characterized in that the water-soluble polymer is used as a wrapping material for the preparation of flux or is introduced into the flux preparation as granulate or powder. 5. Method for the production of fluxes according to claim 4, characterized in that a water-soluble sheet of polyvinyl alcohol or polyvinyl alcohol derivatives is used for the preparation of flux. 6. Method for the production of fluxes according to claim 4, characterized in that the water-soluble polymer is introduced into a pasty flux preparation as granulate or powder. 7. Use of flux preparations according to claim 1 to 6 for welding elements of aluminum or aluminum alloys or for welding elements of aluminum or aluminum alloys and suitable materials, for example, elements of copper, brass, iron or fine steel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10359222.9 | 2003-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA06006449A true MXPA06006449A (en) | 2007-04-10 |
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5032123B2 (en) | Flux | |
| KR101731657B1 (en) | Anticorrosive flux | |
| US8075706B2 (en) | Paste composition for aluminum brazing | |
| JP4705221B2 (en) | Flux for brazing metallic materials, use of activator combination and brazing material-flux combination | |
| US10682731B2 (en) | Process for making a boric acid free flux | |
| JPH0299296A (en) | Flux for aluminum material brazing and brazing method | |
| CN106029296A (en) | Flux for brazing of aluminum alloys | |
| US2480723A (en) | Solder-flux mixture | |
| MXPA06006449A (en) | Fluxing agent | |
| KR102617585B1 (en) | Flowable brazing compositions and methods of using the same to braze metal articles together | |
| US10058957B2 (en) | Boric acid free flux | |
| US3858319A (en) | Soldering | |
| JP2000343275A (en) | Brazing filler metal, and flux for brazing aluminum or aluminum alloy | |
| US3409478A (en) | Aerosol brazing flux and method of brazing therewith | |
| DE20321164U1 (en) | Fluxing agent containing complex alkali metal fluoride and polyvinyl alcohol, used especially for soldering aluminum or its alloys with aluminum or with other metals such as copper, brass, iron or steel | |
| JP2011251325A (en) | Weld spatter anti-adhesive agent, and method of preventing spatter adhesion using the same | |
| JPS62224496A (en) | Flux coating composition for brazing aluminum of aluminum alloy | |
| JPS6037292A (en) | Brazing method of aluminum and alloy thereof | |
| TW533116B (en) | Water soluble soldering flux for copper and aluminum | |
| JPS6228195B2 (en) | ||
| CS259554B1 (en) | Low-corrosion paste solder | |
| JPS63230297A (en) | Flux for brazing | |
| CS274368B1 (en) | Flux filling on snpb base for tube solders |