Handan Donghong Fiberglass & Color Steel Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of powder coated galvanized c purlin in China. If you're going to wholesale cheap powder coated galvanized c purlin made in China, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
Description
Powder coated galvanized C purlin starts with hot-dip galvanized C-section steel. The zinc coating blocks moisture and oxygen. Then we apply powder spraying and heat curing to create an outer anti-corrosion layer over the zinc.
Product Features
The base metal already carries a galvanized coat before any powder is applied.
Having both zinc and powder gives better corrosion resistance than powder alone.
Section height and wall thickness follow regular C purlin sizes, so load-bearing capacity stays adequate.
Main Applications
Chemical plants, sewage treatment stations, animal breeding farms, buildings near coastlines, food processing lines, and storage warehouses.
Product Parameters
|
Parameter |
Description |
|
Base material |
Hot-dip galvanized C-section steel |
|
Surface treatment |
Degreasing, then powder spraying |
|
Coating process |
Powder coating plus high-temperature curing |
|
Custom options |
Length, section size, powder color |
|
Installation |
Same as regular C purlin |
Product Advantages
Powder coated galvanized C purlin offers two protective layers. If the powder coat gets scratched, the zinc underneath still prevents rust. That means longer life in damp or salty air. The powder top coat also handles acids and alkalis.
About Us
Handan Donghong began in the 1990s. Our plant occupies about 52,000 m², runs 21 automatic lines, and employs more than 150 people. We mainly make steel structure accessories, FRP lighting sheets, purification panels, polyurethane edge-sealed boards, and C-shaped steel purlins. Yearly output hits 9 million m².
FAQ
Q1: Does the zinc layer hurt powder coating adhesion?
A1: No. We degrease the galvanized surface before powder spraying, which removes oil and residue so the powder sticks well to the zinc.
Q2: How do we protect welded areas after installation?
A2: Welding burns off zinc near the joint. For full protection, put cold galvanizing spray or zinc-rich primer on the welded spots.
Q3: What zinc coating weight is typical?
A3: Standard hot-dip galvanizing for C purlin runs about 60–80g per m² (Z60–Z80). Heavier coatings can be ordered if needed.
Q4: How many years does this dual coating last outside?
A4: In normal industrial settings, about 8–10 years. In coastal or very humid areas, expect 5–7 years before touch-up.
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