Welding and foundry

Welding and foundry

The wire of welding electrodes is coated with mineral powders bonded with sodium or potassium silicate. Silicate acts as a cementing agent and also helps the extrusion process, and the alkalis necessary for controlling gaseous emissions of the electrical arc. Special results are achieved in reducing chromium emissions. Used as a binding agent for forming cores and foundry cores with CO2 process.