Welding Shielding Gases serve different purposes. Why are Welding Shielding Gases is Important? The oxygen reacts then with silicon/ manganese presents in the weld puddle to create oxides such as Manganese oxide or silicon oxide. For example, CO 2 as shielding gas, break into ‘CO’ and ‘O’ in the welding arc. Reactive gases (Active Shielding gases). Reactive gases mean the welding gases that can react will molten weld metal to make their oxides.For example, argon as inert gas will not react with any oxygen or metal in the welding arc and puddle, thus we will not see any slag or silicate or oxides on the surface of TIG welding with argon or helium. Inert gases. Inert refers to “non-reactive gases which don’t have valance electron cell thus not taking part into any chemical reactions”. ![]() There are two main types of Welding Shielding Gases used to protect weld pool: ![]() 7 Shielding gases for Aluminum Welding First, Welding Shielding Gases Types:
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