Hot-dip galvanizing (HDG) L Shaped Anchor Bolts
After rust removal, the l shaped anchor bolts are immersed in molten zinc at 450–480°C. Through a high-temperature metallurgical reaction, a composite coating—consisting of a zinc-iron alloy layer and a pure zinc layer—is formed on the steel surface; the zinc layer is metallurgically bonded to the base material, resulting in exceptionally strong adhesion.
Electro-galvanizing (galvanizing) L Shaped Anchor Bolts
Utilizing the principle of electrolysis at room temperature, zinc ions are deposited onto the surface of L-shaped anchor bolts from a zinc-salt solution, forming only a thin layer of pure zinc; the coating bonds to the substrate via physical adsorption, resulting in relatively weak adhesion.
HDG L Shaped Anchor Bolts VS galvanizing L Shaped Anchor Bolts
| HDG L Shaped Anchor Bolts | galvanizing L Shaped Anchor Bolts | Key advantages of hot-dip galvanizing | |
|---|---|---|---|
| Zinc coating thickness | 45–85 μm (National Standard ≥55 μm) | 5–15 μm | The thickness is 5–15 times that of electro-galvanizing, providing a thicker anti-corrosion barrier. |
| Corrosion resistance | Salt spray test: 500–1,000 hours; resistant to rain, salt spray, acids, and alkalis | Salt spray test: ≤100 hours; suitable only for dry indoor environments | Corrosion resistance is 5–10 times that of electro-galvanizing |
| Service Life | 15–30 years without significant rust in outdoor/coastal environments | Red rust appears within 3–5 years in outdoor environments | Service life extended by 3–10 times; significantly reduced maintenance costs |
| Coating Adhesion | Metallurgical bond; resistant to peeling or detachment | Physical adsorption; prone to wear and flaking | Higher long-term stability; no risk of corrosion protection failure |
| Suitable Applications | Outdoor infrastructure, steel structures, photovoltaics, coastal projects, and humid environments | Indoor equipment, standard dry environments, and short-term use | Suitable for harsh, corrosive conditions; broader range of engineering applications |
Post time: Jul-28-2026