Zinc-rich galvanized coating Zinc Purity: 99+%. Works like hot-dip galvanizing on ferrous metals indoors and out. Withstands water temperature up to 212°F (100°C) and continuous dry heat up to 750°F (400°C). Commonly used as a flash rust preventive on welded areas. Applications of air conditioning parts， antennas， bridges， chain link fences， docks， ducts， heating parts， machine housing， tanks， material handling equipment， newly welded surfaces， off-shore rigs， outside storage tanks， pipes plumbing， pulley.