Motion Sensor 6m Solar Street Light with LED All-in-One Home Garden Lighting

Motion Sensor 6m Solar Street Light with LED All-in-One Home Garden Lighting

Advantages of galvanized sheet solar street light:

1. Cost advantage: lower material and manufacturing threshold
(1) The cost of raw materials is significantly reducedThe cost of galvanized sheet (hot-dip galvanized steel sheet) as a raw material is typically 30%-50% lower than that of aluminum alloy. Take Q235 galvanized sheet, for instance: its price per ton is approximately 4,000-6,000 yuan, whereas the price of 6063 aluminum alloy profiles per ton can reach 18,000-25,000 yuan. This cost difference is directly reflected in the price of end products, meaning the overall price of galvanized sheet street lamps can be reduced by 20%-40%. As such, they are more suitable for municipal projects with limited budgets or markets in developing countries.
(2) The processing technology is simple, and the cost of mass production is manageable.
Galvanized sheet can be shaped through traditional processes like stamping and welding, with low equipment investment costs and high production efficiency (for example, the daily output of assembly lines can reach 2-3 times that of aluminum alloy production). In contrast, aluminum alloys require extrusion or die-casting processes, which involve high mold costs (a single set of molds costs 5-10 times that of galvanized sheet molds) and pose greater difficulties in processing complex structural components. This leads to a sharp increase in costs for small-batch production.

2. Structural strength: more suitable for heavy loads and harsh environments
(1) Superior impact resistance and wind load endurance
The tensile strength of galvanized sheet (375-500MPa) surpasses that of most aluminum alloy profiles (the tensile strength of 6063 aluminum alloy is approximately 190MPa), making it particularly well-suited for coastal typhoon zones or windy, sandy regions. For instance, a 1.5mm-thick galvanized sheet lamp pole can withstand wind speeds of 40m/s (equivalent to a Category 14 typhoon), whereas an aluminum alloy pole of the same thickness would need to be increased to over 2.5mm to achieve the same level of strength, resulting in higher costs.
(2) Exceptional vibration resistance and deformation resilience
In areas with heavy traffic or unstable geology (such as alongside highways and railways), the rigid structure of galvanized sheet street lamps is less likely to experience loose connectors or pole bending due to long-term vibration. In contrast, aluminum alloy has a low elastic modulus (around 70GPa, compared to 210GPa for galvanized steel), and prolonged vibration may cause wear to bolt holes, compromising stability.

3. Corrosion resistance: a long-term advantage in specific scenarios
(1) Electrochemical protective properties of the hot-dip galvanized coating
The zinc coating (with a thickness of ≥85 μm) on the surface of galvanized sheets undergoes preferential oxidation in humid environments, forming a zinc oxide protective layer. Even if the coating is partially damaged, it prevents the steel sheet from rusting through the "sacrificial anode" mechanism. For example, galvanized sheet street lamps can have a service life of 15-20 years in industrially polluted areas or coastal high-salt-spray environments. In contrast, untreated aluminum street lamps may suffer from surface chalking within 5-8 years due to galvanic corrosion (a reaction between aluminum alloys and chloride ions in the air).
(2) Reduced maintenance expenses
When the galvanized coating is damaged, it can be repaired by applying zinc-rich paint, with costs approximately one-third of those for aluminum alloy surface treatments (such as anodizing repairs). However, if the oxide film of aluminum alloys is damaged, the entire component needs to undergo re-anodizing, which is both costly and technically complex.

4. Recycling and environmental protection characteristics
(1) Greater metal recyclability
The steel in galvanized sheets can be fully recycled and remelted, with the recycling process consuming only one-fifth of the energy required for aluminum alloy recycling (approximately 2.5MJ per kilogram for steel recycling versus 12MJ per kilogram for aluminum alloy). For environmentally aware European and American markets, galvanized sheet street lamps are more likely to obtain ISO 14001 certification and meet green procurement criteria.
(2) Lower disposal costs
The anodized films or spray coatings on aluminum alloy surfaces may emit harmful gases during incineration. In contrast, the combustion product of the zinc layer in galvanized sheets is zinc oxide, which has lower toxicity and better complies with environmental protection regulations.