Galvanizers

Galvanizer Tours

Visit a hot-dip galvanizing facility and watch as fabricated steel is staged, cleaned, prepped and finally dipped into a kettle full of molten zinc to complete the galvanizing process.

Attendees will learn first hand about the Hot-Dip Galvanizing (HDG) process, from staging material through each process until the steel is silver-gray and fully protected against corrosion.

About Galvanizers

Hot-dip galvanizing (HDG), is the process whereby fabricated steel, structural steel, castings, or small parts are immersed in a kettle or vat of molten zinc, resulting in a metallurgical bonded alloy coating that protects the steel from corrosion.

Steel is galvanized post-fabrication and generally en-route to the project site. The galvanizing process consists of moving the steel through various baths. The first bath ensures the steel is free of grease, dirt and oil and following this it is neutralized, then dipped in an acid bath to remove any oxidation. To prevent further oxidation and prepare the steel for actual galvanizing the steel goes through another chemical mixture before arriving at the zinc kettle.

The zinc kettle contains 99% pure molten zinc, heated between 815-850F. Once the steel is dipped into the kettle the chemical reaction occurs naturally and once the base metal reaches the same temperature as the molten zinc it is complete. There is no cure time needed although each batch is typically then dipped into a vat of water for cooling.