Galvabar vs. Epoxy-Coated Rebar: Which is Better for Coastal Infrastructure?
Coastal infrastructure must prioritize one overarching hazard that other infrastructural environments don’t: extreme corrosion. When bridges, overpasses, and utility installations are along the coast, they face continuous exposure to salty sea air, highly alkaline soils to the north and acidic soils to the south, and even direct seawater. Construction teams don’t just need advanced processes for tackling corrosion and building long-lasting infrastructure; they need materials that can handle coastal corrosion and salts.
Both hot-dip galvanized rebar, also known as galvabar, and epoxy-coated rebar can resist different types of environmental decay, but galvabar offers superior durability and performance for coastal infrastructure. With this guide, you can compare the different attributes of Galvabar vs. epoxy-coated rebar to order your inventory and support your customers’ needs with confidence.
Galvabar Overview
Galvanized rebar is hot-dipped galvanized metal that is ASTM A1094-compliant and easy to work with in a wide range of applications.
Process
Manufacturers produce galvabar by hot-dipping steel rebar into zinc, giving it a seamless protective coating that can resist corrosion. Galvabar fabricators apply the coating with a Continuous Galvanizing Line (CGL) before forming and bending (unlike traditional hot-dipped galvanized rebar), which provides better protection without brittle coatings, cracks, or peeling.
Benefits
Galvabar offers the construction and infrastructure industry many advantages for coastal projects. Because Galvabar coating adheres better to the material surface, the bar is more flexible and can bend without flaking. This saves time and reduces bottlenecks because companies can order pre-galvanized rebar and bend or shape it based on unique project demands without having to send it back for additional processing. The high-purity zinc coating of galvabar’s CGL process is thinner and more uniform, ensuring a more consistent product.
The primary benefit of galvabar is its corrosion resistance. The hot-dip zinc coating creates a solid protective layer against moisture, salt spray, and humidity, mitigating the risk of rust and helping structures stay strong with less maintenance. The layer of protection is sacrificial or “self-healing,” meaning scratches won’t make the underlying metal vulnerable to rust and corrosion. The material bonds well to concrete and performs well in all installation conditions.
Applications
Galvabar is well-suited to these infrastructural applications:
- Cable hooks in railway roadbed cable troughs
- Railways
- Highways
- Subways
- Bridge deck installations
- Docks
- Jetties
- Foundations
Epoxy-Coated Rebar Overview
Epoxy-coated rebar also offers corrosion protection. However, the coating can fail, leading to corrosion developing at the failure point and quickly damaging the metal under the remaining coating.
Process
Fabricators can apply fusion-bonded epoxy coatings through a simple process. First, the rebar undergoes surface preparation, such as cleaning. Fabricators also pre-bend and form the rebar before the coating process occurs. Next, fabricators heat the surface, apply the powder, and cure it. Some processes apply epoxy coating by painting, applying layers that dry in place on the rebar surface.
Benefits
Epoxy-coated rebar offers significant corrosion resistance. The epoxy coating protects the metal underneath from strong chemicals, especially heavy pollutants and industrial chemicals. While the coating can scratch or crack during handling and post-coating forming, it is possible to repair the coating. Epoxy-coated rebar also has a smaller initial price than galvabar, making it a more budget-friendly option.
The green epoxy coating makes it easy to inspect the surface of the rebar for damage. If you need a cost-effective option for moisture-rich climates and coastal settings, experienced crews can make long-lasting structures with epoxy-coated rebar.
Applications
Some of the applications for epoxy-coated rebar are:
- Water treatment facilities
- Parking garages
- Marine and coastal installations
- Repairing existing coastal structures
Contact Adelphia Metals to Learn More
Galvabar is the superior choice for most coastal infrastructure projects, and getting the right rebar delivered to your build sites is critical for long-term infrastructural success. Adelphia Metals is a trusted rebar distributor. We source high-quality rebar from trusted fabricators to construction companies, rebar finishing companies, concrete precasters, and more based on their unique project needs, and we can meet requirements for volume size, lead times, and specialty features so you can support all downstream demand.
We excel in fast, reliable distribution, so you can turn to Adelphia Metals when you have tight timelines or run out of steel on your jobsite. Contact us today to tell us what you’re looking for or request a quote to start your order.
