The TIG Brush® comprises a brush through which an electric current is passed. The brush is dipped into a cleaning fluid and then applied to the areas to be cleaned. The fluid is designed to remove the iron oxide marks which result from welding.
The brush is designed to convert the electric current to high temperatures, especially at the end of the bristles. While the fluid is quite benign at room temperatures, the brush heats the fluid to an elevated temperature, when it becomes much more re-active. This results in an accelerated chemical action at the surface of the Stainless Steel.
Unlike Pickling Paste, the active ingredients of the cleaning fluid are not inherently dangerous to operator health, and if used correctly the fluid is non-toxic to the environment.