Aluminium welding electrode  is divided into two categories, the first class to the main heat-resistant surface coated with a 20-25 micron thick Al-Si alloy (containing Si6-8.5%), resistant to high temperature of 640 degrees. The second category of corrosion mainly for the pure aluminum coating, the coating thickness is 2-3 times the first class. When these two types of welding galvanized steel can get a good solder joint strength.

As the conductive coating, thermal conductivity, therefore requires a large welding current. And copper alloys should be hard spherical electrode. The following table Aluminium welding wire for the first spot welding conditions. For the second category, the coating thickness should be used in a larger current and a lower electrode pressure.

keywords: Welding Electrode