Since 1967, San Diego Galvanizing has been hot-dipping structural steel, pipe and railings in zinc . Product applications include commercial and residential uses ranging from shipyards, bridges and highways, to residential utilities.
process requires dipping parts into a galvanizing kettle that holds 110 tons
of molten zinc. A fan draws about 80 percent of the zinc chloride and ammonium
chloride fumes coming off the galvanizing bath into a 3-foot diameter duct inlet
where most of the zinc is removed by a wet scrubber. Some fugitive emissions
containing zinc escape onto the roof where they settle, or are swept out of
the air in stormwater runoff.