Coating thickness is one of the important factors affecting the durability of color coated aluminum coils. The selection of coating thickness requires a
comprehensive consideration of the specific application environment and cost budget to ensure that the color coated aluminum coil can maintain good
performance and appearance in long-term applications. If 3003 color coated aluminum coil is applied in strong corrosion, extreme weather, and
chemical industrial environments with high requirements for weather resistance and corrosion resistance, a thicker coating (25-35um) can more
effectively prevent the invasion of corrosive media in the environment and better resist ultraviolet radiation, reducing the aging and fading of the coating and improving the durability of the application. How to choose the appropriate coating thickness for different application environments? Please refer to the following analysis
Different coatings have different thickness requirements
PE Coating
The thickness requirement for PE coating is ≥ 18um. 3003 color coated aluminum coils with a thickness of 18um-20um can meet basic corrosion resistance requirements and are suitable for outdoor buildings with good environmental conditions and stable climate, such as factory cladding and commercial buildings
HDP Coating
The thickness requirement for HDP Coating is ≥ 20um. HDP coatings with a thickness of 20u-25um have better weather resistance can maintain bright colors and complete coatings for a long time. It is more suitable for outdoor building decoration, industrial mills and other applications that require high weather resistance
PVDF Coating
The thickness requirement for PVDF Coating is ≥ 25um. PVDF coating has excellent weather resistance, corrosion resistance, and chemical resistance.It can resist the erosion of harsh environments and industrial pollution environments. It is more suitable for applications with high durability and corrosion resistance requirements, such as curtain walls and roofs of iconic buildings in coastal areas, stadium,,railway and airport, etc.
Different application environments have different thickness requirements
General environmental applications
For outdoor building decorations, billboards, and other applications with good environmental conditions, coatings with a thickness of 18um-20um can meet basic requirements for corrosion resistance and weather resistance
Application of acid rain and salt spray environment
In corrosive environments such as acid rain and salt spray, coatings with a thickness of 20-30um can provide good protection for applications. Its ability to block moisture and chemicals is stronger than thin coatings, effectively preventing corrosive ions from penetrating into the coated aluminum coil substrate. In applications such as exterior wall , The coating thickness of 20-30um can maintain good appearance and corrosion resistance for a long time, with a service life of generally 10-15 years and providing stable protection for painted aluminum coils.
Coastal and industrial environment applications
In coastal construction applications with high humidity and high salinity, the 25-35um PVDF coating can form a denser protective layer for the aluminum coil, which can effectively prevent the intrusion of oxygen, moisture and corrosive chemicals, and slow down the corrosion rate of the aluminum coil by seawater.
What can Hanchen Do For You?
Customer requirement
25um
Test result
27-29um
Hanchen Metal will give reasonable suggestions on coating thickness according to the building application environment and customer needs and conduct multiple tests during the production process and after production. HanchenMetal can guarantee that the coating thickness of our color coated aluminum coils will only exceed the customer's standards.
A Coated aluminum Coil manufacturer that can provide you with solutions
We invite you to contact us with any inquiries.