Aluminum and its alloys are widely used in industries such as transportation, metallurgy, aerospace, construction bridges, electronics, automotive manufacturing, packaging containers, and military equipment due to their low density, high strength, corrosion resistance, good thermal conductivity, and electrical conductivity. During use, aluminum and aluminum alloy components may suffer damage for various reasons, most of which need to be repaired throughAluminum welding agentwelding repair. Manual arc welding and gas welding are usually used for repairs.

However, in certain situations, aluminum structural components and aluminum wires may face power outages, lack of gas sources, or absence of welding equipment, requiring quick repairs. Additionally, there is a need for rapid connection of damaged aluminum parts and aluminum conductors in high-altitude, underwater, and harsh environments. In another case, arc aluminum welding technology is not permitted under field working conditions.

Non-electric self-propagatingAluminum welding agentis a new type of welding material based on self-propagating high-temperature synthesis technology and welding technology. It utilizes the self-propagating reaction heat of high-heat agents as the welding heat source and the metals produced from the reaction as the filler for the weld. Using non-electric self-propagating aluminum welding agents for welding does not require external energy or equipment; only a small and lightweight self-propagating aluminum welding agent and electrode are needed for welding anytime and anywhere. It is convenient to carry and use, with flexible and simple operation. Currently, non-electric self-propagating aluminum welding agents and electrodes are mainly used for welding steel and copper materials. This is because the main components of coated electrodes suitable for steel and copper materials are iron oxide, copper oxide, and aluminum powder. Iron, copper, and aluminum tend to form brittle compounds during solidification, resulting in poor mechanical properties. Once the welding is completed, the weld may suffer brittle failure. Therefore, common metal oxides like copper and iron cannot be components of self-igniting welding agents for thermite reactions to achieve self-propagating welding of aluminum and its alloys.

This self-propagating aluminum welding agent is specifically designed for welding aluminum and aluminum alloys. Aluminum welding agents are safe, portable, fast, and easy to operate without external energy or equipment. No specialized personnel are needed; workers experience low labor intensity; there is no welding arc, making it suitable for special environments like strong magnetic fields. The welding efficiency is high; thermal deformation during welding is minimal; weld strength is high.

During the aluminum welding agent process, the heat released from this reaction ignites the unreacted agent behind it so that the covered electrode can gradually advance to the end until it burns out after ignition. In this process, rosin powder and paraffin oil powder also assist in combustion to release heat. Moreover, since the products of complete combustion are carbon dioxide (gas that disperses into the air), they do not mix with the filler metal or affect the quality of the weld.

Before using thisAluminum welding agentand electrodes for welding, there is no need to groove the interface of the aluminum base material to be welded or perform decontamination, degreasing, or removal of oxide films. The welding process with aluminum agents and electrodes does not require other auxiliary energy sources, agents, or equipment and is not affected by external magnetic field environments.