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Zinc is used typically in order to protect the steel. Zinc coatings provide protective and durable barrier for the steel, and most importantly it acts as a sacrificial protection for any exposed areas of steel, galvanizing is the method of coating the steel with zinc.

~ Pre-Galvanized Zinc ~
This finish is an economical solution in the normally dry indoor application where the atmosphere is less corrosive.In this finish zinc coating is applied on both sides of the steel sheet during manufacturing itself, resulting in bright and smooth surface finish. The base metal edges (cut edges) exposing in further manufacturing operations is not a hindrance to the usage in the indoor dry atmosphere application - even though the exposed area may have a slight discoloration which can be mistaken as rust - because of the self-repairing cathodic protective effect. Not suitable for any highly corrosive and high humidity atmospheric conditions.

~ Hot Dip Galvanized After Fabrication ~
This finish is having a considerably longer protection under normal industrial and commercial environments. Hot dip galvanizing is a process where completely manufactured or roll formed steel is chemically cleaned of all contaminants and then dipped in molten zinc. This will allow a coating consists of iron/zinc alloys which are usually over coated with a layer of almost pure zinc. The thickness of zinc coating depends on the thickness of the steel. Local coating thickness varies from 35μ-55μ depending on thickness. Please note that this is purely a mechanical operation focusing on the degree of protection rather than the aesthetic appearance. More thickness of zinc can be achieved by this method compared to any other process, leaving a light film of zinc on the small holes on the surface of the product

The process is based on applying the coating electrostatically as spray which ensures that the surface is fully and evenly covered, the process is completed by hardening the product into an oven. Two of the most advantageous coatings are polyester & epoxy powder coating; they are applied directly on the prime steel, or even over the galvanized steel to enhance the zinc coating effectiveness.