Thermo-diffusion galvanizing is a process in which metal parts are mixed with a patented dry alloy zinc powder and dry heated within slowly rotating, sealed stainless steel containers. The containers are heated inside a furnace at 680 to 878oF (360 to 470oC). The process diffuses the dry alloyed zinc powder into the surface of the steel parts and results in a protective, corrosion-resistant surface. According to its developers, pretreatment is not required, and the process works on welded as well as pre-assembled movable items.
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