AZZ 4th Quarter and Fiscal Year 2023 Earnings Release

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

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

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

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.