Select appropriate welding materials: Use welding materials specifically designed for weathering steel that match the base metal to ensure that the corrosion resistance of the welded joint is comparable to that of the base metal, thus guaranteeing the overall weather resistance and mechanical properties of the structure.
Pre - heat the base metal: In cases of high - restraint conditions, such as when the thickness of the steel plate exceeds 25mm, it is advisable to pre - heat the base metal to 80 - 100°C before welding. This can reduce the cooling rate of the welded joint and decrease welding stress, preventing the occurrence of cracks.
Dry the electrodes: Before welding, the electrodes should be dried at 350 - 400°C for 60 minutes to remove moisture, which helps prevent the formation of pores during the welding process.
Adopt proper welding methods and parameters: Conventional welding methods such as manual arc welding, gas - shielded welding, and submerged - arc welding can be used, but the appropriate welding method and parameters should be selected according to the specific situation. Precise control of welding parameters such as welding current, voltage, and welding speed is required to ensure good welding quality.
Pay attention to the welding operation technique: To prevent pores from occurring during arc - starting, the backward - forward method can be adopted.
Strengthen personal protection: Wear flame - resistant clothing, leather gloves, welding helmets, safety glasses, and other personal protective equipment to protect the body from burns, electric shocks, and harm caused by flying debris.
Ensure good ventilation: Weld in a well - ventilated area to prevent the accumulation of harmful fumes and gases produced during the welding process, which can affect the health of operators.
