What causes porosity in MIG welding?
Porosity in MIG welding is caused by:
Contaminants: Oil, grease, moisture, or dirt on welding surfaces.
Poor Gas Coverage: Inadequate shielding gas or leaks expose the weld pool.
Improper Welding Parameters: Incorrect settings lead to excess spatter.
Base Metal Composition: Metals like aluminum and stainless steel form oxide layers without proper cleaning.
Electrode Contamination: Impurities from contaminated electrodes or consumables.
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