Home > Products > Guardrail Surface Treatment

Two Kinds of Surface Treatment: Hot-dip Galvanizing & Plastic Coating

Guardrail surface treatment can be divided into: hot dip galvanizing and plastic coating.

Almost all of highway guardrails employ hot-dip galvanizing, which is an effective metal treatment and is a form of galvanization. It is the process of coating iron and steel with a layer of zinc by immersing the metal in a bath of molten zinc at a temperature of around 840°F (449°C). When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (O2) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO2) to form zinc carbonate (ZnCO3), a usually dull grey, fairly strong material that protects the steel underneath from further corrosion in many circumstances.

Another surface treatment of guardrail is plastic coating, which is typically applied electrostatically and is then cured under heat to allow it to flow and form a "skin". The powder may be athermoplastic or a thermoset polymer.

Pieces of guardrail are placed to overlap each other.
Galvanized guardrail beam with good mechanical properties, and can be used in harsh environment.
Plastic coated guardrail beam with green surface.
The surface of plastic coated guardrail beam can be painted different colors, it has elegant appearance.

Hot-dip galvanizing: anti-corrosion, anti-scratch, anti-oxidation, anti-rust.
Plastic coating: elegant appearance, wear resistance, low cost.

Model Average check limit triple-spot test Min check limit triple-spot test
Guardrail beam, post, end terminal 600 g/m2(85 um)


425 g/m2 (61 um)
Fasteners, offset block, bracket 350 g/m2(50 um) 275 g/m2 (39 um)
Custom requirements are available.
If you need to consult the price, please contact the business department by e-mail:
Dacheng will service for you !
E-mail: info@guardrailbarrier.org

When you contact us, please provide your detail requirements. That will help us give you a valid quotation.

Full Name *
Country Code * + Phone Number *
Your Website
Message *
^ Back to Top