Why Surface Treatment Matters
Corrugated aluminum sheets are valued for light weight, corrosion resistance, and structural rigidity from the corrugated profile. Surface treatments extend their service life and add color and texture options for architectural use. Common treatments include anodizing, fluorocarbon or PVDF coating, electrophoretic coating, and powder coating, with premium products using micro-arc oxidation for enhanced hardness and insulation.
Anodizing
Anodizing forms a dense oxide layer on the aluminum surface through an electrolytic oxidation process. The oxide film greatly enhances corrosion, wear, and weather resistance while providing an attractive finish that can be colored or left in a natural metallic tone. Anodized corrugated sheet offers uniform gloss and multiple color choices with good insulation and thermal stability.
Fluorocarbon PVDF Coating
PVDF coating uses polyvinylidene fluoride as the primary film-forming resin to produce a high-performance coating. It provides outstanding resistance to corrosion, UV rays, acid rain, and salt spray, retaining color and gloss for more than 25 years. PVDF-coated sheets are the standard for long-term architectural projects requiring minimal maintenance and superior weather resistance.
Electrophoretic and Powder Coating
Electrophoretic coating, or e-coating, applies paint evenly through an electric field for a uniform, tightly bonded film with high coating efficiency, commonly used for interior panels. Powder coating electrostatically sprays dry powder that is heat cured into a tough, smooth, decorative finish with typical coating thickness of 60 to 100 microns, offering high hardness and excellent impact and scratch resistance.
Other Finishes
Additional options include wood grain transfer, stone texture coating, brushed or hairline finish, and anodized plating, giving architects and designers diverse visual effects while maintaining aluminum's natural durability.
Composition of the Base Alloys
1050 contains at least 99.5 percent aluminum with silicon and iron limited, 1060 at least 99.6 percent, and 1100 at least 99.0 percent with silicon plus iron limited to 0.95 percent. The high purity of these alloys gives excellent corrosion resistance and consistent surface response to all treatments.
Frequently Asked Questions
Q: What is the most durable coating?
A: PVDF fluorocarbon coating, with service life exceeding 25 years.
Q: What does anodizing do?
A: It creates a dense oxide layer for corrosion and wear resistance.
Q: What is the typical powder coating thickness?
A: 60 to 100 microns.
Q: Which alloys are used for corrugated sheet?
A: 1050, 1060, and 1100 pure aluminum grades.
Q: What finish resists acid rain and salt spray?
A: PVDF coating, tested beyond 3000 hours of salt spray.
Q: What decorative finishes are available?
A: Wood grain, stone texture, brushed, and colored anodized finishes.
Contact us for corrugated aluminum sheets in 1050, 1060, and 1100 with your required surface treatment.
