Selection Techniques and Key Indicators for Pre-coated Color Galvanized Steel Sheets
Time：2025-09-05
Rational selection is crucial to maximizing the performance of pre-coated color galvanized steel sheets, requiring focus on three key indicators: environment, coating, and substrate.
Coating Selection Based on Environment:
PE coating for ordinary indoor environments
SMP coating for outdoor non-corrosive environments
HDP coating for industrial buildings or moderately corrosive environments
PVDF coating as the priority choice for harsh environments like coastal areas and snowy regions
Substrate Considerations:
Confirm galvanized layer weight: 120g/㎡ for general scenarios; 150g/㎡ or higher recommended for severely corrosive environments
Steel grade selection based on load requirements: DX51D+Z (ordinary grade) or S350GD+AZ (high-strength grade)
Other Key Indicators:
Coating thickness (topcoat ≥20μm for better durability)
Salt spray resistance time
Aging resistance time
Manufacturer's quality guarantee period
Processing Requirements:
