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NEWS CENTER
Blog
22
2026
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03
Extending Solar Lifespans to 25+ Years with Zn-10%Al Coated 1770 MPa Steel Wire
The 25-Year Challenge in Solar Infrastructure
Utility-scale solar farms are designed to operate for 25 to 30 years. While photovoltaic panels are highly durable, the supporting structures are constantly exposed to harsh environmental conditions.
Rain, humidity, salt spray, and temperature fluctuations can significantly accelerate corrosion in conventional steel components.
For flexible solar mounting systems (suspension structures), the risk is even higher. These systems rely entirely on high-tension steel wire. Any corrosion-related strength loss may directly impact structural safety.
Why Standard Galvanization Is No Longer Enough
Traditional zinc-coated (galvanized) steel wire performs well in mild environments. However, in outdoor solar applications—especially coastal, agricultural, or high-humidity areas—standard galvanization may degrade over time.
As a result, many solar EPC contractors are shifting toward Zn-10%Al coated steel wire (commonly known as Galfan or Super Galfan) for enhanced corrosion protection.
What is Zn-10%Al (Galfan) Coating?
Zn-10%Al coating is an advanced alloy composed of:
- Approximately 90% Zinc
- 10% Aluminum
- Trace alloying elements
This composition creates a more stable and corrosion-resistant protective layer compared to pure zinc coatings.
Key Benefits
- Improved corrosion resistance in outdoor environments
- Better performance in coastal and high-humidity conditions
- Enhanced durability during installation and tensioning
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | GB/T 17101-2019 |
| Diameter | 3.0 mm |
| Tensile Strength | 1770 MPa |
| Breaking Force | 12.5 kN (Lab Tested) |
| Elongation | Compliant with GB/T 17101 |
| Coating Type | Zn-10%Al (Galfan) |
| Coating Weight | 250 g/m² |
| Coating Standard | EN 10244-2 (Heavy Coating Level) |
| Delivery Form | Coils (Unstraightened) |
| MOQ | 5 Tons |
| Lead Time | 7–14 Days |
| Inspection | SGS / BV Available |
Why 250 g/m² Coating Matters
Coating thickness plays a critical role in long-term performance.
A heavier coating such as 250 g/m² provides:
- Extended corrosion resistance compared to lighter coatings
- Better protection against mechanical damage during installation
- Improved durability for long-term outdoor exposure
This makes it particularly suitable for solar suspension systems requiring long service life.
Combining Strength with Corrosion Resistance
In addition to coating performance, mechanical strength remains essential.
The steel core is engineered to achieve 1770 MPa tensile strength, allowing:
- Long-span structural design
- Reduced number of support points
- Lower overall system cost
Coil Delivery for Efficient Installation
The wire is supplied in coils to match real installation conditions.
Advantages include:
- Continuous long-length deployment
- Reduced need for joints
- Maintained mechanical integrity
- Improved installation efficiency
Typical Applications
- Flexible solar mounting systems
- Suspension PV structures
- Coastal or high-humidity solar projects
- Agricultural solar installations
Supply Capability
We provide export-ready high-tensile steel wire solutions for global buyers.
- MOQ: 5 tons
- Lead time: 7–14 days
- Packaging: Coil form for container shipment
- Inspection: Third-party inspection (SGS, BV) available
FAQ
Q1:Is Zn-10%Al coating better than traditional galvanization?
A:Yes. Zn-10%Al coatings provide significantly improved corrosion resistance and are widely used in demanding outdoor environments.
Q2:How long can this coating last in solar applications?
A:Actual lifespan depends on environmental conditions. However, heavy Zn-10%Al coatings are widely recognized for long-term outdoor durability.
Q3:Why is coating weight important?
A:Higher coating weight means more material protection, which directly contributes to longer service life.
Q4:Can this wire be used in coastal areas?
A:Yes, it is suitable for coastal and high-humidity environments where corrosion resistance is critical.
Conclusion
For solar mounting systems designed to last 25 years or more, corrosion resistance is just as critical as mechanical strength.
Zn-10%Al coated 1770 MPa steel wire offers a balanced solution, combining durability, strength, and installation efficiency for modern solar infrastructure.
Contact us today to discuss your project and get a fast response within 24 hours.
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Tianjin Ruibaolong Prestressed Steel Strand Co., Ltd. is one of the professional manufacturers specializing in the research, development, production, and operation of prestressed steel wires, cold-drawn steel wires, and steel wires for roll welding machines.
Address: No. 3, Tianyu Road, Tianyu Science and Technology Park, Jinghai District, Tianjin
Email: globaltrade@rblprestress.com
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