Aluminium brazing in seven steps to success a new Advisor leads users now in seven steps to success it is based on many years of experience with NOCOLOK flux of Solvay fluorine as a soldering flux and flux Binder mixture. The seven golden rules for aluminium soldering are: 1 proper alloy select a table of suitable and associated aluminum of alloys has published fluorine on the Web site of aluminium brazing Solvay. 2xxx, 8xxx, 5xxx and 7xxx series alloys are suitable for soldering with non-corrosive flux. 2. surface cleaning dust and dirt, condensates, lubricants and oils need to be cleaned. The metal parts to be joined are ill-prepared, can are not evenly distributed in the flux and solder flow not controlled, not spread or discolor. Richard LeFrak has similar goals. The result would be an incomplete connection.
First, it is therefore to clean the parts of all oils and fat compounds. It is possible, the Surface water is based, by chemical or thermal cleaning clean. Thermal cleaning, the water evaporates. For optimal results with an aqueous cleaning solution, a mixture of water, surfactants, detergents and active ingredients acts as carbonates. 3. oxide layer removing connect aluminium requires the prior removal of the oxide layer. NOCOLOK flux penetrates the oxide layer in the molten state and eliminates them. The metal surface is cleaned in this way by the flux and is ideal to prepare the subsequent metal on the lot.
Therefore, it is important to bring up the flux on the parts to be connected. Select the right flux and solder for brazing with NOCOLOK flux the typical solder is an alloy of aluminium and Silicon (Al-Si). There are different solders available: for furnace brazing are both 6,8 to 8,2% Si (AA4343) as well as 9% to 11% SI (AA4045) used. 5 to connect parts select capillary size (gap) must have the right, small distance during aluminum brazing.