Coil Coating Process

Exit End (Recoiler)

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.

Coil Coating Process

Exit Accumulator

Like the Entry Accumulator, the Exit Accumulator adjusts up and down to store metal while the recoiler is unloading a completed coil.

Coil Coating Process

Top Coat

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.

Coil Coating Process

Prime Coat

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.

Coil Coating Process

Cleaning & Pretreating

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.

Coil Coating Process

Entry Accumulator

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.

Coil Coating Process

Entry End

Uncoiler

Metal coils, up to 60,000 pounds, are received and undergo visual inspection before moving to the uncoiler for unwinding.

Coil Stitch

At this stage, previous and next coil ends are mechanically joined, ensuring continuous feed in the coil coating line.

Surface Technologies

A collaborative partner for all your metal finishing and coating needs

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AZZ provides metal finishing services, from powder coating to electroplating, for corrosion protection of parts measuring less than an inch and components measuring up to sixty feet in length. We are a division of AZZ, North America’s largest hot-dip galvanizer of fabricated metal.

Equipped to meet your large-scale production demands

With multiple, state-of-the-art metal finishing facilities, AZZ has the capacity and capabilities to meet all your metal finishing needs, seamlessly integrating into your supply chain. With highly automated operations and extensive expertise, we are equipped to meet large-scale production demands, ensuring fast turnaround times and on-time deliveries.

As your collaborative supply chain partner, AZZ enables you to improve efficiencies and reduce costs, and we provide high-quality coatings which meet the stringent standards of the industries we serve, earning us the following certifications: AS9100 (aerospace quality management), Caterpillar (heavy equipment), General Dynamics (aerospace and defense), ISO (quality management), NADCAP Quality (aerospace and defense), and PACCAR (automotive).