How to Stick Weld Aluminum
Stick welding, technically known as arc welding, is a method for joining pieces of metal together. It requires the application of intense heat in order to melt the metal and join it together. The direction you weld, the level of heat applied, as well as the type of shielding gas, all vary depending on the type of metal you are welding. Welding aluminum follows the same basic procedure used to weld any other type of metal. Nevertheless, understanding the differences between metals is vitally important to avoid welding improperly or unsafely.
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Things You'll Need
- Water
- Paper towels
- Welder
- Welding contact tip
- Argon gas
- Welding rods
- Welding gloves
- Welding shield
Instructions
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1
Clean the aluminum you are going to weld to avoid burning any dust, dirt or other materials that may be clinging to the surface. You can use water and paper towels to clean and dry the aluminum. Make sure the material is as clean as possible before beginning.
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2
Choose a welder that welds hot and fast. Aluminum melts more quickly than many other metals. Using a welder that welds slowly may cause your aluminum to completely melt, ruining your weld. Try a welder that welds at least 115 volts or higher. Your welder must also be direct current as you will need a constant voltage to ensure that it stays hot and works fast.
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Install a welding contact tip that is larger than the electrode. This is done because aluminum expands rapidly in heat and you don't want the expanding aluminum touching your electrode. It should be at least 0.015 inches larger than the electrode.
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Use argon gas as your shielding gas. Shielding gases come out of the tip of the welding gun and protect the weld from outside gasses such as oxygen. Argon burns hot and fast, making it perfect for aluminum welding.
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Start your weld at the bottom of the metal and push away from your body. The push technique is a quicker method which spreads the shielding gas more effectively. This will heat the aluminum quicker and more efficiently. Push quickly as you weld to avoid melting the aluminum completely.
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