1. The cut edges can self-heal. The magnesium and zinc ions in the damaged area migrate to form a dense protective film, automatically closing the wound and eliminating the need for zinc plating. The corrosion resistance of the cut edges is only 15% to 20% lower than that of the intact surface.
2. The corrosion resistance has increased exponentially. The neutral salt spray test can last for 2000 to 3000 hours (while ordinary galvanizing only lasts for 500 to 700 hours). The corrosion rate in the high-salt spray environment of the coastal area is only 1/5 to 1/10 of that of hot-dip galvanizing, and the applicable grades are expanded from C2 to C4 to C4 to C5.
3. The lifespan is the same as that of the module, reaching 25 to 30 years. It requires no maintenance or mid-term replacement, and the total life cycle cost is even better.
4. The processing performance is good. It can be directly cold-formed and punched using pre-coated plates, eliminating the need for secondary galvanizing and not being limited by high-temperature deformation. The hardness of the coating is 2 to 3 times that of pure zinc, and it is wear-resistant and scratch-resistant.
5. It is environmentally friendly and low-carbon, without heavy metals such as chromium, and complies with RoHS standards.
The corrosion resistance of the zinc-aluminum-magnesium coating is 3 to 10 times that of ordinary hot-dip galvanized steel. The neutral salt spray test can last up to 3,000 to 9,000 hours, which enables it to easily cope with harsh environments such as high-salt spray in coastal areas, industrial acid rain, and high humidity in the south. The bracket's lifespan can reach over 30 years, perfectly meeting the long-term operational requirements of 25 years for photovoltaic power stations.
The zinc-aluminum-magnesium coating has a unique self-repairing ability: the alloy elements at the cut surface or scratch will flow with the liquid film, automatically forming a dense protective film of zinc hydroxide, magnesium hydroxide, etc., covering the rust and blocking the corrosion from penetrating, eliminating the need for post-treatment or secondary anti-corrosion treatment, significantly reducing construction and maintenance costs.
The weight is approximately 30% lighter than traditional hot-dip galvanized steel brackets, while the strength is comparable to that of galvanized steel (yield strength ≥ 350 MPa). It has excellent wind pressure and snow load resistance. The lightweight design significantly reduces transportation, hoisting, and installation costs, especially suitable for scenarios with sensitive loads such as rooftop photovoltaics.
The zinc-aluminum-magnesium solar mounting bracket has a dense coating, excellent processing performance for stamping, bending, welding, etc., and no need for secondary hot-dip galvanizing. The production cycle is significantly shortened. Directly cutting and forming for use, eliminating post-processing steps, enabling faster project delivery and effectively ensuring the grid connection node.
Although the initial purchase price is slightly higher than that of traditional hot-dip galvanized brackets, with its extremely long lifespan and low maintenance requirements, the total cost over 25 years can be reduced by 15% to 20% compared to galvanized brackets. Compared to aluminum alloy brackets, the price is 15% lower, and it has higher strength and better load-bearing capacity. It is the optimal solution that balances performance and cost.
The carbon emissions during the production process are lower than those of the hot-dip galvanizing process. The material recovery rate exceeds 95%. The corrosion products are non-toxic and harmless, fully conforming to the green and sustainable development concepts of the photovoltaic industry. This helps the project obtain green certifications and gain bonus points in ESG evaluations.
|
Parameter Item |
Standard Grade S350GD+ZM275 |
High Strength Grade S450GD+ZM310 |
Ultra-High Strength Grade S550GD+ZM275 |
|
Coating Composition |
Zn + Al (1.5~11%) + Mg (1~3%) + trace Si |
Zn + Al (1.5~11%) + Mg (1~3%) + trace Si |
Zn + Al (1.5~11%) + Mg (1~3%) + trace Si |
|
Coating Mass |
275 g/m² (both sides) |
310 g/m² (both sides) |
275 g/m² (both sides) |
|
Minimum Yield Strength |
350 MPa |
450 MPa |
550 MPa |
|
Minimum Tensile Strength |
420 MPa |
510 MPa |
580 MPa |
|
Minimum Elongation after Fracture A80 |
20% |
16% |
12% |
|
Sheet Thickness Range |
1.5 ~ 3.0 mm |
1.5 ~ 3.0 mm |
1.5 ~ 4.0 mm |
|
Applicable Standards |
EN 10346 / ASTM A792M / GB/T 2518 |
EN 10346 / ASTM A792M / GB/T 2518 |
EN 10346 / ASTM A792M / GB/T 2518 |
|
Application Scenarios |
Conventional ground-mounted PV plants, rooftops |
Long-span, high-load conditions |
Extreme environments, extra heavy-load conditions |
|
Test Item |
Technical Indicator |
Test Standard |
Remarks |
|
Neutral Salt Spray Test (NSS) |
≥ 3000 hours without red rust |
ISO 9227 / ASTM B117 |
High-end products can reach 9000 hours |
|
Acetic Acid Salt Spray Test (AASS) |
≥ 1500 hours |
ISO 9227 |
Simulates industrial acid rain environment |
|
Cut Edge Self-Healing Performance |
Protective film formed within 48 hours in humid environmentVisual inspection after salt spray test |
— |
Unique property of Zn-Al-Mg alloy |
|
Service Life in Coastal Outdoor Environment |
≥ 25-year design service life |
ISO 8565 / outdoor exposure test |
Within 500 meters from coastline |
|
Corrosion Rate in Industrial Environment |
0.3 ~ 0.8 μm/year |
ISO 9226 |
Far superior to hot-dip galvanized steel |
|
Relative Corrosion Resistance Multiple |
3~10 times that of hot-dip galvanized steel |
Salt spray comparison at equal thickness |
Varies with different environments |
|
Model |
Width (mm) |
Height (mm) |
Thickness (mm) |
Length (mm) |
Weight (kg/m) |
Application Scenario |
|
ZM-U4040 |
40 |
40 |
1.8 |
6000 / Custom |
1.58 |
Residential rooftop PV |
|
ZM-U4241 |
42 |
41 |
2.0 |
6000 / Custom |
1.96 |
C&I rooftop PV |
|
ZM-U4262 |
42 |
62 |
2.0 |
6000 / Custom |
2.31 |
Ground-mounted PV plant |
|
ZM-U4272 |
42 |
72 |
2.5 |
6000 / Custom |
2.95 |
Large-scale ground-mounted PV plant |
|
ZM-U6060 |
60 |
60 |
2.5 |
6000 / Custom |
3.42 |
Heavy snow load areas |
|
Model |
Width (mm) |
Height (mm) |
Flange Width (mm) |
Thickness (mm) |
Length (mm) |
Application Scenario |
|
ZM-C100 |
100 |
50 |
15 |
2.0 / 2.5 |
6000 / Custom |
Standard ground-mounted PV plant |
|
ZM-C120 |
120 |
50 |
15 |
2.0 / 2.5 |
6000 / Custom |
Medium-sized ground-mounted PV plant |
|
ZM-C140 |
140 |
60 |
20 |
2.5 / 3.0 |
6000 / Custom |
Large-scale ground-mounted PV plant |
|
ZM-C160 |
160 |
60 |
20 |
2.5 / 3.0 |
6000 / Custom |
Heavy snow load areas |
|
ZM-C200 |
200 |
70 |
20 |
3.0 / 3.5 |
6000 / Custom |
Centralized PV station / tracker bracket |
|
ZM-C250 |
250 |
75 |
25 |
3.0 / 4.0 |
6000 / Custom |
Extra heavy load conditions |
|
Model |
Section Size (mm) |
Wall Thickness (mm) |
Length (mm) |
Theoretical Weight (kg/m) |
Application Scenario |
|
ZM-FG40 |
40 × 40 |
1.8 / 2.0 |
6000 / Custom |
2.13 / 2.35 |
Small posts / diagonal braces |
|
ZM-FG50 |
50 × 50 |
2.0 / 2.5 |
6000 / Custom |
2.98 / 3.68 |
Standard posts |
|
ZM-FG60 |
60 × 60 |
2.0 / 2.5 / 3.0 |
6000 / Custom |
3.62 / 4.48 / 5.32 |
Posts for ground-mounted PV plants |
|
ZM-FG80 |
80 × 80 |
2.5 / 3.0 / 4.0 |
6000 / Custom |
6.05 / 7.21 / 9.45 |
Heavy-load posts |
|
ZM-FG100 |
100 × 100 |
2.5 / 3.0 / 4.0 |
6000 / Custom |
7.62 / 9.08 / 11.97 |
Posts for centralized PV stations |
|
ZM-JG50100 |
50 × 100 |
2.0 / 2.5 / 3.0 |
6000 / Custom |
4.51 / 5.58 / 6.64 |
Beams / purlins |
|
Model |
Height (mm) |
Flange Width (mm) |
Thickness (mm) |
Length (mm) |
Application Scenario |
|
ZM-Z100 |
100 |
50 |
2.0 / 2.5 |
6000 / Custom |
Medium & small ground-mounted PV plants |
|
ZM-Z140 |
140 |
60 |
2.5 / 3.0 |
6000 / Custom |
Large-scale ground-mounted PV plants |
|
ZM-Z180 |
180 |
70 |
2.5 / 3.0 |
6000 / Custom |
Long-span rooftops |
|
ZM-Z250 |
250 |
75 |
3.0 / 4.0 |
6000 / Custom |
Extra long-span / heavy load applications |
Address
S213 Jinghai District, Tianjin City, China
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