ZAM Zn-Al-Mg Alloy Coated C Channel Purlin – High Corrosion Building Grade
Product Overview
ZAM zinc-aluminum-magnesium alloy coated C purlin is the next-generation corrosion-resistant framing material designed for harsh-environment building projects. The ternary alloy coating delivers unique self-healing cut-edge corrosion protection, outperforming both standard galvanized and galvalume steel in long-term atmospheric exposure. This grade is ideal for building envelopes in coastal, industrial and agricultural regions, providing extended service life and reduced maintenance cost.
Why Choose CNB ZAM C Purlins?
We supply advanced ZAM alloy coated C purlins from leading Chinese mills with patented alloy composition and coating technology. Every section undergoes strict corrosion testing including salt spray and cut-edge corrosion verification to guarantee performance in harsh environments. We offer both standard and high strength base grades with various coating weights to match specific project corrosion and load requirements.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | ZAM Alloy Coated C Channel Steel Purlin |
| Steel Grade | S350GD high strength steel |
| Coating System | Zn-Al-Mg ternary alloy |
| Coating Mass | ZM100 – ZM200g/m² (double side) |
| Material Thickness | 1.5mm – 3.0mm |
| Section Height Range | 80mm – 300mm |
| Key Feature | Self-healing cut-edge corrosion protection |
| Corrosion Performance | 2–3x vs standard hot-dip galvanized |
| Applicable Standards | ISO 17961, EN 10162 |
| Expected Service Life | 25–30 years (coastal/industrial) |
Core Advantages
- Self-healing corrosion: Automatic cut-edge and scratch protection for long service life.
- Harsh environment proven: Excellent for coastal, industrial and agricultural buildings.
- Extended design life: Matches 25+ year building design lifecycles.
- Paint compatible: Excellent adhesion for subsequent color coating systems.
- Sustainable performance: Lower coating weight for equal or better corrosion protection.
Applications
This ZAM C purlin is widely used for coastal building roofing, industrial plant cladding, agricultural barns, waste treatment facilities, salt storage buildings and high-corrosion building envelopes.
Get a Quotation
We supply ZAM alloy coated C/Z purlins and structural sections for harsh-environment construction projects. Corrosion test reports and project-specific material recommendations are available upon request. Contact our advanced construction materials team for a detailed quotation.
