Views: 0 Author: Site Editor Publish Time: 2024-11-22 Origin: Site
PV mounting systems can be categorized based on material and surface treatment:
By Material: Carbon steel, aluminum alloy, stainless steel.
By Surface Treatment: Hot-dip galvanized, zinc-aluminum-magnesium alloy.
Service Life:
Typically lasts over 20 years.
Regular galvanized steel has a shorter lifespan, around 10-15 years.
Key Factors:
The hot-dip galvanization process forms a dense zinc layer on the surface, effectively preventing rust and corrosion, thereby extending the service life.
Regular galvanized steel has a thinner zinc coating, leading to reduced corrosion resistance and shorter durability.
Environmental conditions such as humidity, acidity, and salinity can accelerate corrosion, especially in harsh environments, significantly shortening the lifespan.
Service Life:
Typically lasts over 20 years.
Key Factors:
Zinc forms a protective film on the surface.
Aluminum improves hardness and strength.
Magnesium enhances anti-corrosion properties.
This alloy features excellent corrosion resistance due to the synergistic effects of zinc, aluminum, and magnesium.
When exposed to air, the protective film prevents oxygen and moisture from corroding the internal metal, delaying rust formation.
Self-repairing ability is a critical feature of this alloy. If the protective film is slightly damaged (e.g., scratched or locally corroded), the zinc and magnesium elements in the alloy react with water and oxygen to regenerate the film, preventing further corrosion.
Service Life:
Generally lasts over 25 years.
Key Factors:
Aluminum alloy is lightweight, corrosion-resistant, strong, and easy to process.
A natural oxide layer forms on the surface, providing excellent corrosion resistance and preventing further oxidation.
Even in harsh environments, aluminum alloy systems maintain a long lifespan. However, their relatively low strength necessitates careful design and load-bearing considerations to avoid structural failure under excessive weight.
Service Life:
High-quality stainless steel mounting systems typically last over 30 years under normal conditions.
Key Factors:
304 Stainless Steel: Commonly used for PV systems.
316 Stainless Steel: Offers superior corrosion resistance, suitable for highly corrosive environments such as coastal or chemical exposure areas, though it is more expensive.
Stainless steel has excellent corrosion resistance, high-temperature tolerance, and high strength, making it suitable for long-term use in extreme environments.
Corrosion resistance varies by grade
