What does oxidation do to molten weld metal?

It contaminates the weld.

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  1. It contaminates the weld ✔
  2. It strengthens the weld
  3. It cleans the weld

Why: Oxygen in the air can oxidize molten metal and contaminate the weld, so shielding is needed.

Huh, didn't know that: Oxygen in the air can oxidize molten metal and contaminate the weld, so shielding is needed.

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Oxidation is a real airhead!
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References

Answer: It contaminates the weld. Oxygen in the air can oxidize molten metal and contaminate the weld, so shielding is needed.

  1. Welding en.wikipedia.org/wiki/Welding
    The weld pool must be protected from oxygen in the air that will oxidize with the molten metal
    Checked 2026-11-07.

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