The application pertains to the control and distribution in and around a blast furnace. I would think it would be similar to a smelter area.
Currently we use tin as much as possible, but recently the field maint had 600V breakers rebuilt with silver plating, which I know is more susceptable to Sulphur. I'm looking at replacing the stationary part of the breaker disconnects with tin plating. The manufacturer is going to test the temperature rise of this combination.