The resistance of AZS fused-cast blocks to corrosion and erosion by molten glass can be assessed by means of high temperature tests under both static and dynamic conditions. In static tests, small bars of standard shape and size are immersed in a glass melt contained in a platinum crucible at high temperature, and left there in static conditions for a specified time. The test is comparative, and allows the performance of 2, 4 or 6 samples to be determined at the same time.

In static tests, small bars of standard shape and size are immersed in a glass melt contained in a platinum crucible at high temperature, and left there in static conditions for a specified time. The test is comparative, and allows the performance of 2, 4 or 6 samples to be determined at the same time.

In both cases, the level of corrosion after testing is quantified as the variation of the residual section of the specimens from the initial dimensions, measured at the glass level line (“metal line”), i.e. the region of maximum corrosion. The test duration and temperature, the speed of rotation of the test system and the composition of the glass bath can be adapted to the specific needs of the customer.