Shixinda's China Zinc Aluminum Magnesium Z Channel has a surface fused with a ternary alloy protection layer of zinc, aluminum, and magnesium. It is enhanced with a trace amount of silicon to improve adhesion performance. It is combined with factory-installed non-chrome passivation and fingerprint-resistant coating processes. The entire process is free of hexavalent chromium harmful substances, meeting global environmental protection export standards.
The product adopts a bidirectional joint Z-shaped cross-sectional structure. It can achieve continuous longitudinal connection and force-bearing of the roof. The edges, corners, and folded positions of the cross-section have uniform and dense coatings. After cold bending, punching, cutting, and other processing, the protective layer still remains intact. It is a high-end prefabricated steel structure enclosure main material that replaces traditional hot-dip galvanized profiles.
Base material: S250GD/S350GD/S550GD high-strength structural steel;
Coating: Zn-Al-Mg ternary alloy, conventional ratio: zinc 85% - 90%, aluminum 3% - 6%, magnesium 1.5% - 3%, with trace silicon added to enhance coating adhesion;
Forming structure: Standard section is height H × wide flange B × small flange edge C × wall thickness t, Z-shaped bidirectional lap joint, can be continuously spliced, different from C-shaped steel with single lap joint;
Surface treatment: Factory standard includes chrome-free passivation + fingerprint-resistant coating, environmentally friendly without hexavalent chromium.
1. Ternary alloy self-healing anti-corrosion, comprehensive protection of the cross-section
2. Lightweight design of high-strength base material, more scientific structural force-bearing
3. Chrome-free environmental protection process, compatible with global export compliance
4. Strong processing adaptability, durable coating without peeling
1. Storage environment requirements: The finished product should be placed in a dry and ventilated storage area. Avoid long-term accumulation and closed conditions to prevent moisture condensation and surface formation of passivation water marks, ensuring the appearance and anti-corrosion performance are intact.
2. Construction and installation norms: When installing Zinc Aluminum Magnesium Z Channel, it is recommended to use the same material zinc-aluminum-magnesium accessories to avoid electrochemical corrosion caused by contact between different metals. Strictly prohibit violent knocking, wearing down the protective coating of the profile.
3. Special working conditions adaptation: For severe corrosion scenarios such as strong acid and strong alkali, it is necessary to report in advance. Customized thick alloy coating versions can be provided to adapt to long-term service in extreme corrosive environments.
4. Maintenance instructions for later stages: Zinc-aluminum-magnesium profiles do not require annual painting for anti-corrosion. Daily maintenance only requires cleaning the surface dust. There are no cumbersome operation and maintenance costs, and it eliminates the problem of repeated refurbishment and repair of traditional profiles.
| Parameter Category | Technical Item | Detailed Parameters & Standard Values | Core Explanation & Application Scenarios |
| Section Dimension Specification | Marking Format | Z H×B×C×t (Height × Flange Width × Edge Curl Length × Wall Thickness) | Universal industry marking standard; double-side lap Z-shape enables continuous splicing |
| Section Height H | 60/80/100/120/140/160/180/200/220/250/300mm | Full range of standard sizes in stock, custom non-standard heights available | |
| Flange Width B | 40/50/60/70/80/90/100mm | Standard width matched to corresponding height for balanced structural stress | |
| Edge Curl Length C | 10/15/20/25/30mm | Improves section torsional rigidity and avoids deformation during installation | |
| Wall Thickness t | 1.2/1.5/1.8/2.0/2.3/2.5/2.75/3.0mm | 1.5~2.5mm for solar brackets; 2.5~3.0mm for heavy-load factory buildings | |
| Standard Length | Standard length: 6m, custom lengths from 3m to 12m available | Pre-punched mounting holes optional to simplify on-site construction | |
| Coating Technical Specification | Main Coating Composition | Zn≈87%, Al≈5%, Mg≈2.5%, with trace silicon added | Ternary hot-dip Zn-Al-Mg alloy coating with eco-friendly chromium-free passivation |
| Coating Grade & Weight | ZM70: 70g/m² total both sidesZM120: 120g/m² total both sidesZM150: 150g/m² total both sidesZM275: 275g/m² total both sides | Widely adopted industrial grades; ZM150 equals GI275 hot-dip galvanized coating in anti-corrosion performance | |
| Key Coating Performance | Salt spray resistance 5-10 times superior to ordinary hot-dip galvanized steel; incision self-repair function | Automatically forms passive film on cut or drilled surfaces to prevent rust at sections | |
| Surface Finish | Bright natural Zn-Al-Mg surface without mottling; anti-fingerprint chromium-free passivation film | Hexavalent chromium free, compliant with EU export standards, stain and fingerprint resistant | |
| Substrate Mechanical Specification | Steel Grade | S250GD+ZM, S350GD+ZM, S550GD+ZM | National standard structural steel substrates with Zn-Al-Mg coating, full high-strength grades optional |
| Yield Strength | S250GD: ≥250MPaS350GD: ≥350MPaS550GD: ≥550MPa | High-strength substrate achieves high load capacity with thin wall, low deflection for long-span structures | |
| Tensile Strength | S250GD: 330~450MPaS350GD: 420~520MPaS550GD: 600~700MPa | Meets mechanical requirements of structural steel for all load levels | |
| Elongation Rate | S250GD: ≥22%S350GD: ≥18%S550GD: ≥12% | Guarantees excellent cold forming performance; no peeling or powdering after 180° bending | |
| Processing & Compliance Standards | Applicable Standards | GB/T 33243 (China), EN 10346 (EU), JIS G3323 (Japan), ASTM A1046M (USA) | Compliant with major domestic & international standards, applicable to all export projects |
| Processing Technology | Cold roll forming, punching, plasma cutting, bolt connection available | Prefabricated in factory, no secondary anti-corrosion treatment required on site | |
| Packing Standard | Inner waterproof paper + steel strip bundling, export-grade moisture-proof & rust-proof package | Effectively avoids coating rust during long-distance domestic & ocean transportation |
258MW Coastal Offshore Fish-Power Synergy Project in Haixing, Hebei Province
Environment: Coastal mudflats, high salt fog, high humidity, and constant erosion by seawater moisture.
Material: Z140×50×20×2.0 Zinc-Aluminum-Magnesium Z-type steel, ZM150 coating, S350GD base material.
Core pain points: Ordinary hot-dip galvanized supports corrode at cut edges within 3-5 years, and the maintenance cost is extremely high.
Advantages of selection: Zinc-Aluminum-Magnesium cut edges self-repair, salt fog resistance is 6 times higher than ordinary galvanization; Z-type steel joints are continuously subjected to force, large-span distances reduce main beams, and the overall steel usage is reduced by 18%; 25-year power station cycle does not require secondary rust removal and painting
Customer feedback: Previously, we used ordinary hot-dip galvanized supports. After 3 years of production, the cut edges of the supports were severely rusted, and we had to spend money on rust removal and painting every year. After replacing with Shixinda Zinc-Aluminum-Magnesium Z-type steel, there was no need for additional anti-corrosion treatment during on-site cutting and drilling. After 5 years of production, there were no rust spots on the cross-section, and the durability in salt fog environment was significantly higher. The power station operation and maintenance costs were directly reduced by more than half.
A1: It uses a zinc-aluminum-magnesium ternary alloy self-healing coating, which is chromium-free and environmentally friendly, doubling the anti-corrosion lifespan. The cut edges can automatically prevent rust, and its performance far exceeds that of ordinary galvanized products.
A2: It is suitable for special environments such as breeding and cold chain, and is resistant to ammonia corrosion. It will not produce rust debris that pollutes the site and goods.
A3: The entire series has a chromium-free passivation process, which complies with international environmental standards and can smoothly pass through customs and engineering acceptance.
A4: The coating has extremely strong adhesion. Bending, punching, and cutting will not peel off the coating. The anti-corrosion performance remains unchanged after processing.
A5: The high-strength base material can replace thick materials with thinner ones, effectively reducing the roof load, and achieving a significant overall lightweight effect.
A6: It supports full-size fixed-length, precise punching, and end processing, fully matching the requirements of construction drawings.
A7: There is no need for regular painting and refurbishment. Once installed, it is long-term maintenance-free, significantly reducing engineering operation and maintenance costs.
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