What must be removed from aluminum substation bus joints before welding?

Before welding aluminum substation bus joints, it is essential to remove hydrocarbons. Hydrocarbons, which can be present in various forms such as oils, grease, or contaminants from the environment, can interfere with the welding process. The presence of hydrocarbons can lead to poor weld quality, increased chances of defects, and compromised joint strength.

When aluminum welds are made, the process relies on the formation of a clean, oxide-free surface to achieve a strong metallurgical bond. If hydrocarbons are not eliminated, they can create barriers that prevent proper fusion between the base metal and the filler material during the welding process. Therefore, ensuring that the joints are thoroughly cleaned of any hydrocarbons is crucial for achieving reliable and effective welds in aluminum bus joints.

Understanding this highlights the importance of proper cleaning and preparation before welding, particularly in a substation environment where reliability and safety are paramount.