← Glossary

Inert Gas Purging

Inert gas purging is the introduction of gases like argon or helium on the root side to prevent oxidation and discoloration during the joining process.

Physicochemical mechanism of action

Inert gas purging protects the weld from oxygen, preventing oxidation reactions and discoloration. The gas forms a protective layer between the root and the air.

Metallurgical relevance & welding risks

Without inert gas purging, oxidation can impair the strength of the weld and cause discoloration that complicates the joining process. This leads to incomplete fusion or cracking.

Workshop practice & action instructions

Use argon or helium for welding steels and light metals. The gas flow should be at least 5 liters per minute to form an effective protective layer. Ensure the gas is directed well to the root to achieve maximum protection.

MetallurgieSchweißtechnik

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