What is Welding Porosity?

Welding porosity is a common welding defect that occurs when tiny gas pockets are trapped within the weld metal. These gas pockets, also known as pores, can weaken the weld and make it more susceptible to cracking and corrosion.

Causes of Welding Porosity

There are several causes of welding porosity:

Types of Welding Porosity

Welding porosity can be classified into two main types:

  1. Surface porosity - This type of porosity appears on the surface of the weld and is usually caused by contamination or inadequate shielding gas coverage.
  2. Subsurface porosity - This type of porosity is located within the weld metal and is usually caused by a lack of fusion or inadequate shielding gas coverage.

Effects of Welding Porosity

Welding porosity can have several negative effects on the weld, including:

Prevention and Remedies for Welding Porosity

The prevention and remedies for welding porosity depend on the specific cause of the defect. Some general tips for preventing and remedying welding porosity include:

Conclusion

Welding porosity is a common welding defect that can have serious negative effects on the weld. By understanding the causes, types, and effects of welding porosity, as well as the prevention and remedies for this defect, welders can take steps to reduce the risk of porosity and produce high-quality welds.