Shielding Gas Viscosity
Shielding gas viscosity is a measure of the internal friction of the gas, which affects its flow and turbulence.
Physicochemical Mechanism of Action
The viscosity of a gas describes its frictional resistance. In the workshop, it determines how the shielding gas behaves when it exits the nozzle and the resulting turbulence.
Metallurgical Relevance & Risks in Welding
Too high a viscosity leads to stronger turbulence, which mixes the shielding gas better and distributes a uniform shielding layer over the workpiece. However, too low a viscosity can lead to uneven shielding gas coverage and possible porosity.
Workshop Practice & Action Guidelines
Choose a shielding gas with the correct viscosity to ensure an optimal shielding layer. For heavy steels or high stress conditions, a higher viscosity is advantageous. For delicate materials or low stress, a lower viscosity may be more suitable.