Refractory Coating Accessory

The Refractory Coating Accessory is designed to measure the permeability of refractory coatings used in lost foam casting applications. The accessory uses a specialized screen that is coated with a liquid refractory coating and allowed to dry before testing. This process evaluates the coating's permeability, helping foundries ensure optimal coating performance.

In lost foam casting, refractory coatings are applied to foam patterns before they are embedded in sand. As molten metal is poured, the foam vaporizes while the refractory coating maintains the mold cavity's shape and allows gases to escape. Measuring coating permeability is essential for producing high-quality castings and minimizing defects.