Metallurgists... is There a COR-TEN Steel Sealant?
I have built a fountain out of Corten 3/16 thick which as four bowls that spill into one another. The Corten bulids up a thick orange rust which discolors the water. Even a sample bowl that has been out in the weather ( southern CA) and has developed an even scale of rust will ooze orange rust when filled with water.