Posted 4 months ago
1900s Anti Borax Welding Compound Box
6 3/8" long x 4" wide x 4 5/8" tall
Wooden box that held welding compound. They would use this as a flux while welding. Originally used during forge welding.
I don't really know how old this box is? The pat date says 1902, but they could've used this for a few years?
It's an interesting box joint they used. There is something like 30 joints there.
"Welding flux is a combination of carbonate and silicate materials used in welding processes to shield the weld from atmospheric gases. When the heat of the weld zone reaches the flux, the flux melts and outgasses. The gases produced push the atmospheric gas back, preventing oxidation (and reactions with nitrogen)."
"flux is used to keep the welding surfaces from oxidizing, which would produce a poor quality weld, and to extract other impurities from the metal. The oldest flux used for forge welding was fine silica sand. The iron or steel would be heated in a reducing environment within the coals of the forge."