Aluminum-magnesium-manganese prepainted aluminum coils use
aluminum-magnesium-manganese alloy as the base material and are
processed through the prepainting process. Relying on the
synergistic advantages of the base material and coating, they
exhibit excellent comprehensive performance in construction,
transportation, and other fields. Their core characteristics can be
elaborated from three dimensions: the inherent properties of the
base material, the enhanced functions of the prepainted coating,
and adaptability to application scenarios.
The density of the aluminum-magnesium-manganese alloy base material
is only about 2.7g/cm³, much lower than that of traditional metals
such as steel and copper. With lighter weight under the same area,
it significantly reduces labor and equipment costs during
transportation, hoisting, and installation. It is particularly
suitable for high-altitude operations in scenarios such as
large-span building roofs and curtain walls. At the same time, the
magnesium element in the alloy improves the material’s toughness,
while the manganese element enhances its tensile strength. As a
result, the finished product can achieve a tensile strength of
200-300MPa, capable of withstanding external forces such as wind
pressure and snow load, without easy deformation during long-term
use, thus ensuring structural stability.
A dense aluminum oxide film (with a thickness of approximately
5-10nm) is naturally formed on the surface of the
aluminum-magnesium-manganese alloy. This film can effectively
isolate air, moisture, and corrosive media, preventing further
oxidation of the base material. Even if the film is damaged, the
aluminum elements around the damaged area will quickly regenerate a
new oxide film, achieving "self-healing" protection. For
high-salt-spray and high-pollution environments such as coastal
areas and industrial zones, this characteristic can significantly
reduce the risk of material rust. Compared with ordinary aluminum
alloys, its salt spray resistance is improved by more than 30%, and
its service life can reach 20-30 years.
Aluminum-magnesium-manganese alloy has good fatigue resistance.
Under long-term working conditions such as thermal cycles and
vibrations (e.g., the expansion and contraction of building roofs
affected by temperature changes, and the vibration of
transportation vehicle casings), it is not prone to cracks caused
by stress accumulation. Meanwhile, the material has excellent
ductility and can be processed into various complex shapes such as
arcs and waves through processes like rolling, bending, and
stamping. It adapts to different architectural design styles (e.g.,
curved roofs, special-shaped curtain walls) and product structure
requirements, without easy fracture, wrinkling, or other issues
during processing.
The prepainted coating of aluminum-magnesium-manganese prepainted
aluminum coils uses high-quality paints such as polyvinylidene
fluoride (PVDF), silicon-modified polyester (SMP), and polyester
(PE). It can achieve various appearance effects, including solid
colors (e.g., multiple custom colors in the RAL color system), wood
grain imitation, stone grain imitation, and metallic matte. The
coating has high color uniformity, with the color difference
controlled within ΔE≤1.5 (international general color difference
standard), and can maintain bright colors for a long time. It is
not prone to fading or chalking after 10-15 years of outdoor use,
meeting the decorative needs of building exteriors and the
aesthetic requirements of home appliances and transportation
equipment.
The prepainted coating is equivalent to an additional "protective
armor" outside the aluminum-magnesium-manganese base material: on
one hand, it can isolate external erosion such as ultraviolet rays,
acid rain, and sand dust, further reducing the oxidation rate of
the base material; on the other hand, the coating hardness can
reach 2H-4H (pencil hardness test standard), with stronger scratch
and impact resistance, which can reduce surface damage during
transportation, installation, and use. For example, the PVDF
coating has particularly outstanding weather resistance. Its
performance remains stable in the extreme temperature range of -50℃
to 80℃, making it suitable for harsh climate zones such as
high-altitude, frigid, and high-temperature areas.
Mainstream prepainted coatings (e.g., water-based PVDF paints)
adopt low-VOC (volatile organic compounds) formulations, with a VOC
content of ≤50g/L, which complies with national environmental
protection standards and causes little environmental pollution
during production and use. At the same time, the coating surface
has high smoothness (surface roughness Ra≤0.8μm), so stains such as
dust and oil are not easy to adhere. Daily cleaning only requires
rinsing with water or light wiping to restore cleanliness, reducing
later maintenance costs. It is particularly suitable for dust-prone
scenarios such as building exteriors and home appliance casings.
The characteristics of aluminum-magnesium-manganese prepainted
aluminum coils enable them to accurately meet the needs of
different fields: in the construction field, their lightweight,
high-strength, and weather-resistant properties make them suitable
for roofs of large-span venues (e.g., gymnasiums, exhibition
centers) and curtain walls of high-speed rail stations; in the
transportation field, their advantages of light weight and fatigue
resistance can be applied to the exterior decorations of new energy
vehicle bodies and high-speed rail carriage components; in the home
appliance field, their rich colors and easy-to-clean features are
suitable for casings of refrigerators, washing machines, etc. In
addition, the material can be 100% recycled and reused, and the
energy consumption during the recycling process is only 5% of that
of primary aluminum production, which conforms to the development
trends of green buildings and circular economy.
PVDF / PE Coated Prepainted Aluminium Coil Custom Sizes Colors For Roofing
