The corrosion of refractory by glass melt results in many problems, which increases production downtimes. Porous components such as plunger and tube were infiltrated with glass melt after the change and create a lot of bubbles. Due to the corrosion, these components must be changed after a few months. A new technology for such components was developed at the TU Bergakademie Freiberg, Germany, which lowers the interaction between glass melt and refractory significantly. The coating method of the Ancorro technology for porous refractory bricks influences the glass properties in the contact area. Due to the coating, an oxygen depression is generated in the pores of the bricks. This results in a rising of the viscosity and surface tension of the glass melt in the contact area, which slows down the attack of the refractory by the glass melt. Different measurements demonstrate the influence of a reducing atmosphere to the glass properties. Also the corrosion level of fused cast bricks is realizable with porous bricks after using the coating technology. Mathematical calculations show the influence of the Ancorro coating technology to the typical corrosion processes which lowers refractory attack by the glass melt. During the laboratory tests only homogeneous nucleation were detected by suing the coating technology on the refractory before glass contact.
