Duncan Galvanizing Blog

Can You Powder Coat Hot-Dip Galvanizing?

Posted by Casey Shearns on Mon, May 17, 2021 @ 03:49 PM



Can you Powder Coat Galvanized Steel?

Powder coatings can be applied over hot-dip galvanizing and are a great way to add a desired look or color to material for your project. There are a number of benefits to using duplex systems on your steel, including both corrosion protection and aesthetic benefits. Read on to learn more about powder coatings over hot-dip galvanized steel.

The Powder Coating Process

First, the material is hot-dip galvanized in our zinc bath. The surface is then prepared by removing any bumps or drips from the steel to ensure smooth application. Next, the surface of the material will be profiled with blasting to create good surface adhesion for the powder coating. The steel is then “out-gassed” around 500 degrees fahrenheit to further provide a smooth and adhesive surface. For maximum adhesion, the material is then primed and baked.  

Powder is typically sprayed on to the material soon after after out-gasing. After application, the material is placed in the curing oven where the powder primer will bond to the galvanized coating.

Benefits of Powder Coatings 

Powder coating adds an extra layer of corrosion and weathering protection to your steel (known as a duplex system). The duplex system also allows for less maintenance over time, saving money on the project over time. Additionally, power coatings come in a number of different colors and finishes, allowing you to customize steel for your specific needs.

Duncan’s Powder Coating Options

Duncan Galvanizing offers a number of powder coating options for your project, including Duncan Thermoset, Thermoset Plus, Thermoset 10 and Thermoset 10 Plus. Each powder coating option has different formulations and lengths of guaranteed gloss and color retentions. Visit our specifications page to learn more about our options and download powder coating specs.

Contact Duncan Galvanizing

Duncan Galvanizing is proud to be one of the Northeast’s trusted hot-dip galvanizers. We offer blasting, hot-dip galvanizing, duplex coatings and more. Give us a call today at 617-389-8440 or fill out a contact form on our website.

Tags: Colorgalv, Colorgalv Thermoset