a method for identifying dip - galvanized parts commences with marking a tag with identification indicia for a galvanizable part . the markings and the tag are resistant to molten zinc . a temporary film is applied over the identification indicia . the temporary film is resistant to pre - galvanizing treatment , but is removed during dip galvanizing without obscuring the readability of the identification indicia . finally , the metal tag is associated with the galvanizable part and the part galvanized in a molten zinc bath .