Galvanization - FAQ's
What is galvanization and the benefits?
Hot-dip galvanizing provides a number of benefits to the metal it protects. The metallurgically-bonded zinc-iron alloy layers not only create a barrier between the steel and the environment, but also cathodically protect the iron. The protection offered by zinc means the galvanized coating sacrifices itself to protect the underlying base steel from corrosion or rust.
What is the galvanization process?
Hot-dip galvanizing (HDG) is the process of coating fabricated steel by immersing it in a bath of molten zinc. There are three fundamental steps in the hot-dip galvanizing process; surface preparation, galvanizing, and cooling.
After surface preparation, the steel is dipped in the molten (830 F) bath of at least 98% zinc. The steel is lowered into the kettle at an angle that allows air to escape from tubular shapes or other pockets, and the zinc to flow into, over, and through the entire piece. While immersed in the kettle, the iron in the steel metallurgically reacts with the zinc to form a series of zinc-iron intermetallic layers and an outer layer of pure zinc.
Do I need my fixtures galvanized?
If you live in an area that has high humidity or close to marine and salt water environments, we strongly recommend you galvanize fixtures. For example, those who live near the beach, in the southern gulf states, or areas with extreme weather conditions. Our hot dip galvanizaiton is commercial grade and suitable for commmercial projects.
Does galvanizing alter the appearance of my fixture?
Because the fixture is submerged into zinc, small empty spaces in the metal may result in pronounced imperfections, and a textured surface, where there are seams in the fixture or where the curved laminates are welded together. We do our best to minimize these blemishes without damaging the protection of the galvanization, but after the fixture is painted, noticible textured areas may be apparent.
Galvanization vs. Powder Coating
The powder coating uses a powder which consists of resin and fine pigment particles, electrostatically sprayed on the metal surface. This allows the powder particles to become charged and adhere to the metal surface while being electrically grounded, until the powder has heated up and smoothly fused with the metal in a curing oven. This provides a durable, uniform, attractive and high-quality finish.
All our outdoor fixtures are powder coated for a protective finish on top of the raw metal, and then painted by hand. For those fixtures that are galvanized, after the fixtures are galvanized they are also powder coated for extra protection.
What if I want my order galvanized?
When you place your order, please be sure to notify us at the time of order that you want your fixtures galvanized. We will provide you with the breakdown of the cost and lead time. Fixtures that are hot dip galvanized come with a 10 year warranty against rust, terms and conditions apply.