Soldering of aluminum
Are you interested in soldering aluminum? Supplier Avlob offers to buy aluminum at a bargain price. The supplier guarantees the timely delivery of products to any address in Europe or abroad. Regular customers receive a discount discount. The price is the best in this segment.
Soldering difficulties
Surface oxide film significantly complicates soldering. In addition, the places of soldering are prone to corrosion. The place of soldering should be etched with sulfuric acid, sodium hydroxide solution, followed by washing in water, subjected to nickel plating or copper plating in a galvanic bath, and then soldered with usual soft solders. But the laborious method of electroplating is rarely used. Usually, the edges are peeled before brazing and brazed with a technically pure zinc. Supplier Avlob offers to buy aluminum at a bargain price. The price is the best in this segment of rental.
Percentage of soft solders
| Sn | Zn | Cd | Al | Si |
|---|---|---|---|---|
| 55 | 25 | 20 | - | - |
| 40 | 25 | 20 | 15 | - |
| 63 | 36 | - | 1 | - |
| 45 | 50 | - | 5 | - |
| The basis | 20−25 | 2−6 | - | - |
Percentage composition of solid solder
| Al | Si | Si | t ° С melting |
| basis | 5.2−6.5 | 25−29 | 525 ° |
Sequence of operations
Rosin, stearin, sugar powder are the most commonly used fluxes. Pre-solder rubbing on the surface. For lap joints, powdery zinc chloride is sometimes used as a solder. A powder of dry zinc chloride is poured onto the surface peeled for soldering and heated. Chloride zinc melts. As a result of the exchange reaction, aluminum combines with chlorine and evaporates, and molten zinc fuses with aluminum, penetrating into the surface layer. Thus, the surface of aluminum is treated with zinc, and the parts are joined by a zinc alloy with aluminum.
Optimization
Heating of bonded lapped irradiated parts strengthens the connection, increases the resistance to corrosion. More robust soldering requires hard solder and special fluxes, consisting of 25−30% lithium chloride; potassium fluoride 8−12%; Zinc chloride 8−15% and potassium chloride — the rest. The flux melts at 450 ° C. Such solder and flux ensure strong soldering of aluminum.
Delivery, price
Are you interested in soldering aluminum? Buy aluminum at an affordable price from the supplier Avlob today. The price is formed on the basis of European production standards. Supplier Avlob offers to buy any color alloys at the optimal price in bulk or at retail.