This is applicable when there is a problem of missed plating due to excessive aluminum content in the zinc bath. Before the treatment of the flux, a pre-treatment for preventing missed plating should be carried out to solve the problem of missed plating on the workpiece.

CL-FLJ268 hot dip galvanization anti-bare-spots surface treatment agent is a light blue aqueous solution, mainly composed of water-soluble organic chelating agents, surfactants, antioxidants, activators and metal organic compounds. This product does not contain lead, cadmium, mercury, hexavalent chromium, fluorine or phosphorus, and is an environmentally friendly product. Steel treated with this product and then processed with conventional zinc chloride-ammonium chloride flux can be galvanized in zinc solution with aluminum content ranging from 0.01% to 0.15% without any missed plating.