Home » Porosity Porosity Written by Bryan Joslin on November 1, 2023 Small gas pockets or voids within the weld bead, caused by gas contamination or improper shielding Related Articles: MIG or TIG – Which is Better for Welding Sheet Metal Patch Panels?Upgrading your forced induction system- Installing V-Band ClampsMIG Welding Tips for BeginnersWhy Do You Need a Tungsten Grinder?Common Welding Problems and How to Fix Them.