Which of the following is NOT a function of shielding gas in welding?

In the context of welding, the primary functions of shielding gas are to create a protective atmosphere around the weld area, preventing oxidation, stabilizing the welding arc, and protecting the weld from contaminants. Shielding gases, such as argon, helium, or carbon dioxide, are crucial in maintaining the integrity of the weld by displacing air and moisture, which can cause oxidation and defects.

The role of shielding gas in stabilizing the arc is significant as it helps maintain a consistent arc length and quality of the weld. When the gas is properly chosen and delivered, it creates a controlled environment that enhances the overall welding process.

While heat is indeed necessary for welding, the addition of heat through the shielding gas is not one of its primary functions. The heat necessary for melting the base materials comes from the Welding arc itself, not the shielding gas. Therefore, providing additional heat is not a function attributed to shielding gases, making it the correct answer in this scenario.