How To Prevent Porosity In TIG Welds

Understanding Porosity In TIG Welding

Porosity is a common defect in TIG (Tungsten Inert Gas) welding that can significantly compromise the strength and appearance of a weld. It occurs when gas pockets form within the molten metal, leaving holes as the weld solidifies. Understanding the causes of porosity is crucial to preventing it. Common causes include contaminated base metal, improper shielding gas flow, and faulty electrode handling.

Maintaining Clean Work Surfaces

A critical first step in preventing porosity in TIG welds is ensuring that all work surfaces are clean. Contaminants such as oil, rust, and paint can introduce impurities into the weld pool. Before starting any welding project, it's important to thoroughly clean the base metal using appropriate methods such as degreasing, brushing, or grinding.