In severe corrosion scenarios such as coastal areas, chemical industries, and industrial zones, ordinary hot-dip galvanized steel coils are difficult to meet long-term usage needs.
Aluminum zinc coated steel coils (GL) have become the preferred substrate for high-end factories, photovoltaic brackets, coastal warehouses, and chemical equipment casings worldwide due to the strong anti-corrosion ability of aluminum zinc alloy composite coatings. Longyi Import and Export synchronously supplies full specification aluminum zinc coated steel coils and cut aluminum zinc coated steel strips, suitable for strict anti-corrosion engineering projects in various countries. The products comply with multiple international standards such as JIS, ASTM, EN, and GB, and are exported to Southeast Asia, the Middle East, and coastal areas of Europe all year round.
The aluminum zinc coating is composed of 55% aluminum, 43.4% zinc, and 1.6% silicon high-temperature alloy. Combining the dual advantages of aluminum layer oxidation resistance and zinc layer sacrificial protection, its rust prevention performance far exceeds that of pure galvanized steel coils of the same weight. Aluminum element will form a dense alumina protective film on the surface of the steel plate, isolating the penetration of air, seawater, and acidic mist; The zinc layer actively oxidizes at the cutting section and collision damage of the sheet, protecting the substrate from rusting. Under the same coating weight, the outdoor service life of aluminum zinc coated steel is 2-3 times that of ordinary GI galvanized coils. It can be stably used for more than 12 years in coastal high salt spray environments, and has outstanding acid and alkali corrosion resistance in chemical plant areas, greatly reducing customers' renovation and maintenance costs in the later stage.
The product specifications cover a wide range, with a substrate thickness of 0.14mm-2.0mm, a width of 600-1250mm, a steel coil inner diameter of 508/610mm, a single coil weight of 3-8 tons, and can be processed into various narrow width aluminum zinc coated steel strips as needed. The coating weight is usually 50g/㎡, 100g/㎡, 150g/㎡, 200g/㎡, and the material grades include DX51D+AZ, DX53D+AZ, S350GD+AZ, SGLC and other deep drawing and high-strength series. The yield strength is 350-550MPa, and the bending and stamping forming performance is excellent. The coating is not easy to fall off or crack during processing, and can be directly processed into photovoltaic brackets, corrugated roofs, outdoor equipment cabinets, and light steel exterior wall panels.
Compared to PPGI color coated rolls, the aluminum zinc coated substrate itself has a silver white metallic matte texture, which can be directly exposed for use without additional spraying, saving coating processing costs; If a color coated substrate is used, the aluminum zinc coating has stronger adhesion and is less prone to peeling and fading. PVDF fluorocarbon color coating combined with aluminum zinc coated substrate is a classic combination solution for high-end commercial buildings and coastal villas overseas. The surface process supports passivation, oil coating, and fingerprint free treatment. The fingerprint free version has a delicate and smooth surface, suitable for precision home appliances and decorative processing needs.
Longyi is directly connected to a large domestic aluminum zinc production line, skipping the intermediary link. The minimum order quantity for spot regular specifications is 50 tons, and the minimum order quantity for special coatings and customized widths is 100 tons. Regular orders can be shipped within 15-25 days, and containers are loaded simultaneously at the four major ports of Tianjin, Qingdao, Shanghai, and Ningbo. The export packaging adopts a standard sea freight anti rust kit, reinforced with anti rust paper, waterproof film, and galvanized protective plate to avoid scratching the alloy coating during ocean transportation; Each batch of goods comes with a material list in both Chinese and English, as well as a salt spray testing report, supporting customs clearance and third-party organization acceptance in various countries.
Application scenarios cover diverse high-end fields: roofs of coastal port logistics warehouses, solar photovoltaic support systems, protective enclosures for chemical park equipment, exterior walls of coastal prefabricated villas, outdoor large billboard substrates, high-end home appliance inner liners, and greenhouse skeletons. For different overseas markets, we provide exclusive selection recommendations: Southeast Asian island projects recommend a 150g/㎡ thick aluminum zinc coating, European photovoltaic projects use DX53D deep drawn aluminum zinc steel strip, and Middle Eastern chemical plants are equipped with HDP high weather resistant color coated aluminum zinc composite panels.
Based on our annual export supply strength of millions, we have accumulated a large number of overseas high-end anti-corrosion project supply cases, which can provide customers with similar engineering reference solutions and processing and installation technical guidance. Our professional foreign trade team provides one-on-one follow-up on orders, offering one-stop services from sample delivery, quotation scheduling, logistics tracking to document processing, solving the problem of multi link docking for overseas buyers. If you have a demand for high corrosion resistant steel procurement, you can submit project information through online message, and we will provide accurate quotation and aluminum zinc plating sample plan within 24 hours.