1. Zinc steel  guardrail technology: It is composed of welded joints and assembled horizontally and vertically. Compared to traditional iron guardrails, installation is faster and the appearance is more beautiful.

2. The substrate of zinc steel guardrail consists of six layers, which are:

(1) Base steel: base material, with a hardness value of 159DPN;

(2) Zinc steel alloy layer (Zeta layer): The dense alloy layer closest to the substrate, with complex structure and strong corrosion resistance. It exists as a combination of FeZn7 and FeZn13, with a hardness value of 211DPN and a Fe content of 7% -11%;

(3) Delta layer: Significantly monoclinic columnar structure with a Fe content of 6%, non-toxic, corrosion-resistant, and a hardness value of 179DPN;

(4) Pure zinc layer (Eta layer): dense hexagonal crystal system, difficult to crack during deformation and processing, zinc purity of 98.5%, hardness value of 70DPN;

(5) High zinc phosphating layer: has good corrosion resistance and enhances the adhesion between the coating and the substrate;

(6) High temperature curing layer: Excellent anti-corrosion and impact resistance, with excellent UV resistance, oxidation resistance, and surface self-cleaning performance. The color change rate does not exceed 5% in 15 years.