Once the metal is cleaned, treated, and painted, the strip is rewound into a coil size prescribed by the customer. From there, the coil is removed from the line and packaged for shipment or additional processing.
After the primer is applied and cured, then the metal strip enters the finish coat station where a topcoat is applied. Topcoats provide color, corrosion resistance, durability, flexibility and any other required physical properties. Like primers, the topcoat is cured using thermal cure ovens.
Oven
Coil coating ovens can range from 130 feet to 160 feet and will cure the coatings in 13 to 20 seconds.
During this stage, the strip enters the prime coat station whereby a primer is applied to the clean and treated metal. After the primer is applied, the metal strip travels through a thermal oven for curing. Primers are used to aid in paint adhesion, improve corrosion performance and enhance aesthetic and functional attributes of the topcoat.
S Wrap Coater
The S wrap coater design allows for primers and paints to be applied to the top and back side of the metal strip simultaneously in one continuous pass.
The cleaning and pretreating section of the coil coating process focuses on preparing the metal for painting. During the cleaning stage, dirt, debris, and oils are removed from the metal strip. From there, the metal enters the pretreatment section and/or a chemical coater whereby chemicals are applied to facilitate paint adhesion and enhance corrosion resistance.
Dried-In-Place
In this stage a chemical that provides enhanced corrosion performance is applied. This treatment can be chrome free if required.
The accumulator is a structure that adjusts up and down to store material, which makes continuous operation of the coil coating process possible. This accumulation will continue to feed the coil coating processes while the entry end has stopped for the stitching process. As much as 750 feet of metal can be collected.
AGA Awards: Louis Armstrong New Orleans International Airport
Airports have the potential to offer much more than simply transportation, and the Louis Armstrong New Orleans International Airport (MSY) embodies an innovative and functional approach to air travel.
The airport represents the vibrant culture of New Orleans while being mindful of the economic and environmental impact of this large infrastructure project. With the need to uphold safety standards and ensure the construction was geared toward protecting the long-term investment and lifespan of the structure, designers utilized hot-dip galvanizing (HDG).
The project was completed by AZZ Galvanizing – Morgan City, applying AZZ’s extensive experience and expertise in hot-dip galvanizing to deliver a truly stunning, high-performance result.
For its efforts, this tasteful and carefully thought out airport recently won the American Galvanizers Association (AGA) Artistic award.
About the Piece
Louis Armstrong New Orleans International Airport’s design was inspired by the geography of the Delta region. The building curves like the Mississippi River with the use of arches, columns and glass facades. The use of glass windows creates a terrific view of the airfield and the surrounding outdoors. The Mississippi River is brought to life through the designed created with hot-dip galvanized steel and painted in a duplex system that will leave the design protected for many years to come.
Why the Designer Chose Hot-Dip Galvanizing
The designers chose hot-dip galvanizing because of its sustainability and ability to meet the requirement of a 50-year life with a low maintenance cost. The airport designers wanted minimal upkeep to reduce the amount of delays on the tarmac. Hot-dip galvanizing is durable and will reduce the risk of erosion caused by humid Louisiana weather and the harshness of everyday airport traffic.
The project engineer, who is a LEED® professional DBE, remarked that the initial cost of hot-dip galvanizing was more economical than the high-performance coatings available to the steel industry today. Hot-dip galvanized steel addresses the economic and cultural factors that will make the airport project successful well into the future.
Project Recap
Louis Armstrong New Orleans International Airport won the American Galvanizers Association (AGA) Artistic award because of their innovative and sustainable design using hot-dip galvanizing (HDG). Hot-dip galvanizing offers the necessary protection from the abrasiveness of the day-to-day airport operations. The product was also cost effective, making HDG the right coating for MSY.
AZZ focuses on creating a stronger, safer world, evidenced by our focus on protecting infrastructure from corrosion. This project was an innovative way to show the possibilities of galvanizing. Learn more about AZZ’s capabilities by exploring our hot dip galvanizing capabilities.
Hot-dip galvanizing is a trusted solution for long-lasting corrosion protection, relied upon for its durability and unmatched performance. This video provides a step-by-step look at the galvanizing process, showcasing how steel is transformed with a protective zinc coating that stands up to the toughest conditions. From surface preparation to the final finish, see how this process ensures strength and longevity for projects of all sizes.
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