high acivity aluminum brazing flux paste

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Specifications

Water-soluble aluminum flux can be used together with the aluminum based brazing filler materials to braze aluminum and aluminum

Aluminium welding flux powder:

Availability	Water-soluble aluminum flux can be used together with the aluminum based brazing filler materials to braze aluminum and aluminum alloy, using manual torch brazing and automatic torch brazing
Physical description	White powder, granularity ≤ 150 um, density: 1.3-1.4 g/cm3.
Components	Alkali metals, alkaline-earth metal chlorides, fluoride, and active agent.
Standard	JB/T6045-92, Fluxes for Brazing, Zhuang, Hongshou
Packaging	500 g/box, 20 kg/carton, 500 g/bag, 40 kg/carton, 30 kg/drum, 250 g/box, 20 kg/carton.
Operation	In advance, properly place the brazing filler metal on the brazing joint which will be heated together with the work pieces. In the process of manual torch brazing, firstly, the brazing wire needs to be tipped with the flux Then, after the work pieces are heated to the brazingtemperature,the brazing wire is manually handled to keep close to the brazing joint. The wires are evenly heated by the outer flame from the Multiple-holesbrazing torch, To protect the metallic materials, the flame should be placed at the proper distance away from the wires to avoid the oxidation of the work pieces, producing high-quality brazing seams.
Preparation	In advance, properly place the brazing filler metal on the brazing joint which will be heated together with the workpieces. In the process of manual torch brazing, firstly, the brazing wire needs to be tipped with the flux. Then, after the work pieces are heated to the brazing temperature, the brazing wire is manually handled to keep close to the brazing joint. The wires are evenly heated by the outer flame from the Multiple-holes brazing torch, To protect the metallic materials, the flame should be placed at the proper distance away from the wires to avoid the oxidation of the work pieces, producing high-quality brazing seams.
Post treatment	The residue of the Water-soluble Aluminum Flux attached on the work pieces is corrosive which should be cleaned timely.
Several methods of post treatment
1. Scrub the joint in the water with 50-60C. 2. Complicated work pieces can be merged into cold water after the solidification of the filler metal. The residue can fall off the surfaces because of thesudden boiling of water. Partial component in the residue can be dissolved into the water. In this method, the temperature difference between the cold water and the work pieces should be cautiously controlled to prevent the shaping and cracking of the work pieces. 3. Use 30 g/l concentrated oxalic acid, 15 g/l concentrated sodium fluoride, and 30 g/l concentrated #601 detergent water solution washing. Keep the temperature to be 70-80C. 4. Use phosphoric acid with volumetric fraction of 5%, and chromic anhydride water solution with 1% mass concentration to wash at 82C. 5. After being dipped in hot water, merge the work pieces in to the nitric acid with volumetric fraction of 10% and hydrofluoric acid with volumetric fraction of 0.25% for 2-3 min.

Classification	Brazing temdiverature (°C)	Character	Availability	Standard divackage
FB201S-11	450 — 620	Good fluidity, easy odiveration when brazing, solid&nbsdiv; welding slag is corrosion and easy to removel.	Auto torch &amdiv; hand manual brazing,.for radiator, refrigerator tubes, vehicle divarts.	500g/box, 40 boxes/Carton
FB201S-21	420 — 600	Similar divroducts with FB201S-1, but brazing Temdiverature is lower than FB201S-1.&nbsdiv;	Auto torch &amdiv; hand manual brazing,.for radiator, refrigerator tubes, vehicle divarts.	500g/box, 40 boxes/Carton
FB 201S-23	450— 600	Similar with FB201S-1, but the temdiverature is little higher than FB201S-1.	Auto torch &amdiv; hand manual brazing,.for radiator, refrigerator tubes, vehicle divarts. Furnace brazing, didiv-brazing etc.	500g/box, 40 boxes/Carton

Q:Use of sealant: Construction surface should be clean, hard, dry and no oil, grease and surface dirt such as release agent, curing film and hydrophobic agent. Thoroughly remove all loose particles and ash to search for dust

Q:What is meat adhesive?: Sodium alginate is particularly suitable for use as a meat adhesive.

Q:The 18th China International Adhesive and Sealant Exhibition published papers how to find: Written writing marks the stage that scientific research has entered the stage of expression. In a good topic, rich materials and detailed outline on the basis of written writing should be smooth, but can not be taken lightly. A high-quality academic papers, of course, to enrich the content, but the form can not do not pay attention to the expression of words to be refined, exact, grammatical rhetoric to meet the norms, the length of the sentence to moderate. In particular, it should be noted that the use of medical science and technology style, with a statement to express, reduce or avoid lament, lyrical and other words and vulgar slang, nor at the beginning or end of the paper has nothing to do with the party and government leaders and their political or political situation.

Q:Preparation of China International Coatings, Inks and Adhesives Exhibition exhibition design, seeking to recommend high evaluation of the OKorder exhibition design company, extremely grateful!: OKorder exhibition design to do the excellent ranking of the first to find "Demaghi exhibition" it, won the Chinese exhibition industry a qualification unit honor.

Q:My company wants a one-component anaerobic adhesive / sealant, which is good on the market? Who told me the sound.: Wanda card 515 anaerobic flat sealant is the factory selected raw materials for the production of metal parts

Q:Will the kind of adhesive soluble in water (preferably powder), melting temperature of about 800 degrees, was neutral or weak alkaline, thank you!: Alginate is slightly soluble in water and insoluble in most organic solvents. It is dissolved in alkaline solution, so that the solution is viscous. Sodium alginate alginate is hygroscopic and the amount of moisture contained in the equilibrium depends on the relative humidity. The dried sodium alginate is stored fairly stable in a well-sealed container at 25 ° C and below. Sodium alginate solution is stable at pH 5 to 9. The degree of polymerization (DP) and the molecular weight are directly related to the viscosity of the sodium alginate solution, and the decrease in viscosity during storage can be used to estimate the degree of sodium alginate de-polymerization. High degree of polymerization of sodium alginate stability is less than the degree of polymerization of sodium alginate. It is reported that sodium alginate can be catalyzed by proton hydrolysis, which depends on time, pH and temperature. The propylene glycol alginate solution is stable at room temperature at pH 3 to 4; when the pH is less than 2 or greater than 6, the viscosity will decrease even at room temperature. The sodium powder is wet with water and the hydration of the particles makes the surface sticky. The particles are then quickly bonded together to form clumps, and the agglomerates are slowly and completely hydrated and dissolved. Alginate is more difficult to dissolve in water if it contains other compounds that compete with alginate for hydration. Water in the sugar, starch or protein will reduce the rate of sodium alginate hydration, mixing time necessary to extend. A monovalent cation (such as NaCl) also has a similar effect at concentrations above 0.5%. The pH of sodium alginate in 1% distilled water was about 7.2....

Q:Is the glass gel an industrial adhesive? And neoprene industrial glue distinction: ?Neoprene is the first mass-produced synthetic rubber compound. Neoprene as a follower wide range of applications, with a large initial viscosity, high bond strength, mainly for home and public facilities, decoration, wood industry, footwear industry and other industries.

Q:How to control the concentration and the amount of alcohol: Upstairs said anti. The use of the appropriate concentration of ethanol as a binder (in fact, can only be said to be wetting agent, because you do not add other adhesives), when the granulation of dry particles too much or too hard to consider increasing the ethanol concentration To reduce the concentration of water), if the particles are too soft or too little to reduce the ethanol concentration (equivalent to increase the concentration of water)

Q:What are the uses of silicone oil?: Silicone oil has many special properties, such as low temperature and low viscosity, high and low temperature resistance, oxidation resistance, high flash point, low volatility, good insulation, small surface tension, no corrosion of metal, non-toxic, etc. Due to these characteristics, In many aspects and has excellent results in a variety of silicone oil to methyl silicone oil is the most widely used, is the most important silicone oil varieties, followed by methyl phenyl silicone oil. A variety of functional silicone oil and modified silicone oil Mainly for special purposes.

Q:Application of Polyurethane Adhesive in Automobile: Automotive adhesive / sealant by application site classification, can be divided into automotive body with plastic, automotive interior with plastic, automotive engine chassis with plastic, auto parts with plastic, automotive manufacturing process with five categories of plastic. In 2007, according to the amount of rubber used in different models, the annual consumption of automobile rubber is about 120,000 t, of which one-component moisture-curing polyurethane windshield glue is consumed in the year of 5500t. In addition there are car roof lining water-based polyurethane adhesive, etc. have not yet statistics. In recent years, China's annual demand for polyurethane adhesives to an average of 30% growth rate.

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