Porosity in Welding

Porosity in welding is the formation of air pockets or bubbles in the weld area.  Porosity makes the weld weak and can cause failure of the weld area. 

Some of the causes of porosity are

  • Improper shielding
  • Presence of water or moisture on the weld surface
  • Presence of paint, which can get vaporised during the weld process.
  • Improper gas flow setting in gas welding