Greenhouse framework hot-dip galvanizing process creates durable corrosion protection. Steel members are cleaned and fluxed before immersion. Molten zinc bath coats steel at 450 degrees Celsius. Metallurgical bonding creates zinc-iron alloy layers. Complete coverage reaches interior surfaces of hollow sections. Corrosion rate of zinc is 1/25th of steel. Service life exceeds 20 years in typical greenhouse environments. Quality galvanizing meets international standards.