Differences Between Galvanized Sheet, Aluminum-Zinc Alloy Plate, and Galvanized Silicon Sheet
Differences Between Galvanized Sheet, Aluminum-Zinc Alloy Plate, and Galvanized Silicon Sheet
Zinc-Aluminum Alloy Plate
- Composition: Contains 95% zinc, 5% aluminum, and trace rare earth elements.
- Key Features:
- Excellent plasticity and coating adhesion.
- Maintains corrosion resistance before and after deformation.
- Offers 2–3 times better atmospheric corrosion resistance compared to conventional hot-dip galvanized sheets.
- Good coating and weldability.
- Superior toughness, comparable to electro-galvanized sheets.
- Applications: Ideal for environments requiring high corrosion and weather resistance, often used as a coating material substrate.
Aluminum-Zinc Alloy Plate (GL)
- Composition: Coating contains 55% aluminum, 43.3% zinc, and 1.6% silicon.
- Key Features:
- Smooth surface with excellent atmospheric corrosion resistance, 2–6 times better than hot-dip galvanized sheets.
- High-temperature resistance up to 315℃ without discoloration or deformation.
- Superior water and soil corrosion resistance compared to galvanized and aluminum sheets.
- Heat reflectivity exceeds 75%, double that of standard galvanized sheets.
- Offers good paintability and processability.
- Applications: Widely used as a replacement for traditional galvanized sheets in construction, automotive, and industrial sectors.
Hot-Rolled Galvanized Sheet
- Production Process: Made by pickling and galvanizing hot-rolled sheets directly.
- Key Features:
- Similar performance to cold-rolled galvanized sheets.
- Lower production costs due to the omission of the cold-rolling process.
- More economical with competitive pricing.
- Applications: Commonly used in construction, automotive manufacturing, steel silos, railway cars, and highway guardrails.
Hot-rolled galvanized sheets are less commonly produced in China, as most existing production lines focus on cold-rolled galvanized sheets. However, their affordability and performance make them a practical choice for cost-sensitive applications.
