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The American Galvanizers Association (AGA) is a non-profit trade association dedicated to serving the needs of after-fabrication galvanizers, fabricators, specifiers, architects, engineers, and contractors. The AGA provides technical support on today's innovative applications and state-of-the-art technological developments in hot-dip galvanizing for corrosion control. The AGA also provides a number of services to galvanizers and zinc producers in the industry. The AGA celebrates 85 years of preserving the past, enhancing the present, and protecting the future.
Hot-dip galvanizing is the process of dipping fabricated steel into a kettle of molten zinc. While in the kettle, the zinc reacts with the iron in the steel to form a series of zinc-iron alloy layers. The coating that develops during the galvanizing process is metallurgically bonded to the steel – virtually becoming a part of the steel itself, and providing superior corrosion protection.
When two different metals are in contact in a corrosive environment, one of the metals experiences accelerated galvanic corrosion while the other metal remains galvanically protected. Metals near each other in the galvanic series have little effect on each other. Generally, as the separation between metals in the series increases, the corroding effect on the metal higher in the series increases as well.
Hot-dip galvanizing is a proven steel corrosion protection system that transcends time with minimal economic or environmental impact. Galvanizing's primary components, zinc and steel, are natural, abundant, and 100% recyclable, making hot-dip galvanized steel an infinitely renewable building material.