During galvanizing, if there is too much or uneven iron-zinc alloy, it can cause surface roughness. There might be some white rust, which can give the impression of severe corrosion. The white powder is not zinc rust; it can be treated with a weak acid wipe.

W-beam guardrails absorb collision energy through deformed roadbeds, columns, and beams, forcing vehicles to change direction and return to normal travel lanes, preventing vehicles from veering off the road, and protecting vehicles and passengers to minimize losses caused by accidents.
Wave-shaped guardrail panels are soft in steel, offering strong impact absorption capabilities and excellent visual guidance functions, fitting well with the road's linear appearance. They are suitable for use on small-radius sections and are easy to replace when damaged. Composite wave beam guardrails can be applied on narrow central dividers. For sections where vehicles outside the exit (bridge) may cause severe consequences, enhanced wave guardrail panels can be chosen.