whoops! The material is to act as an erosion screen for a Copper, water cooled splash block in a furnace.
Also as a minor support embedded in the furnace refractory
thanks bogues
I STRONGLY AGREE with Butelja Yes you may have a large anode however Aluminum quickly forms an oxide coating reducing the effective cathode area. The danger is that oxide removed in the bolt area (eg. by exposing scratching inside the bolt holes)will set up a very active corrosion cell (small...