I'm welding with an Innershield FCAW-SS wire and occasionally get porosity. How can I eliminate this?
First, make sure the steel is clean. Vaporization of contaminants on the base metal such as moisture, rust, oil, and paint may cause porosity.
Second, this can be commonly caused by excessive voltage or too short a stickout (the length of wire from the end of the contact tip to the workpiece). Make sure these are within our recommended parameters.
Also, reducing the travel speed also helps minimize porosity.