Product Parameters
| item |
value |
| Place of Origin |
China |
| Application |
Construction field,Home appliance field, Automobile manufacturing field |
| Type |
Steel Coil |
| Thickness |
0.12mm-2.50mm |
| Width |
600-1500 |
| Coil ID |
508mm/610mm |
| Coil Weight |
5 Ton Max |
| Certificate |
JIS,GS,IS09001 |
| Grade |
ASTM A792m,Dx51d+Az,DX51D,SGCC,SGCH,CGCC,CGCL,ASTM A653 |
| AZ Coating |
15-180g/M2 |
| Thickness Tolerance |
+-0.01 |
| Hardness |
SOFT, MID HARD AND FULL HARD |
| Delivery Time |
15-20 days |
| Surface Treatment |
Skin pass/oiled |
| Packages |
Standard export packaging by sea |
| MOQ |
25 Tons |
| Stype |
Hot-Dipped Galvalumed Steel Coil |
| Sample |
Provided |
| Shape |
Coil |
| Standard |
ASTM AISI JIS DIN GB EN |
Certifications
JIS, GS, ISO9001
Packaging & Shipping
Standard export packaging by sea
Galvalumed Steel Coil
Galvalume is a metal material with excellent corrosion resistance and is widely used in construction, home appliances, automobiles and other fields. Its production process and standards are important guarantees to ensure product quality. This article will focus on the production process and standards of galvanized sheets and introduce its related contents in detail.
1. Production process of galvanized sheets
1. Raw material preparation The main raw materials for galvalume plate are cold-rolled base plate and galvanized coating. Cold-rolled substrates require a smooth surface, no scratches, no wrinkles, and certain mechanical properties. The main component of galvanized coating is zinc, which is attached to the surface of the substrate through a hot-dip plating process.
2. Pretreatment Cold-rolled substrates require a series of pretreatment processes before galvanizing. The first is surface cleaning to remove surface oil, oxides and other impurities to ensure the cleanliness of the substrate surface. Then there is pickling, which uses an acidic solution to remove the iron oxide scale on the surface of the substrate and enhance the adhesion between the galvanized coating and the substrate.
3. Hot dip plating Hot dip plating is the core process of galvanizing plate. The pretreated substrate is immersed in molten zinc liquid, and a layer of zinc-iron alloy coating is formed on the surface of the substrate through chemical reaction. This coating has excellent corrosion resistance and mechanical properties, and can effectively protect the substrate.
4. Post-processing: Hot-dip galvanized panels require a series of post-processing processes to improve product quality. Including cooling, zinc removal agent treatment, surface coating treatment and other processes. Among them, the zinc remover treatment is to remove zinc oxide and other impurities on the surface of the zinc coating to make the coating more uniform and smooth. Surface coating treatment can be applied with organic coatings as needed to increase the decorativeness and durability of the product.
2. Production standards of galvanized sheets
1. International standards The production standards of galvanized sheets mainly refer to international standards, such as ISO 3575, ISO 9364, etc. These standards stipulate the chemical composition, mechanical properties, surface quality and other requirements of galvanized sheets, as well as corresponding testing methods and evaluation rules.
2. Industry standards Each country and region has also formulated corresponding industry standards to guide and regulate the production of galvanized sheets. For example, Chinese standard GB/T 2518-2008 "Galvanized and zinc-tin alloy coated steel sheets and steel strips" stipulates the technical requirements, test methods, marking and packaging of galvanized sheets.
3. The production of enterprise standard galvanized sheets also needs to formulate corresponding standards according to the enterprise's own requirements. These standards can include product specifications, process flows, quality control points, etc. to ensure that products meet market demand and customer requirements.
3. Quality control of galvanized sheets
In order to ensure the quality of galvanized sheets, strict quality control is required during the production process. Including the inspection of raw materials, monitoring of the production process, and testing of finished products. Commonly used quality control methods include chemical analysis, physical performance testing, surface quality assessment, etc.
1. Chemical analysis By analyzing the chemical composition of raw materials and finished products, we can understand whether the composition of the product meets the requirements and whether there are impurities and other issues.
2. Physical performance testing includes testing of mechanical properties such as tensile strength, yield strength, and elongation, as well as testing of physical properties such as hardness and wear resistance. These tests evaluate the mechanical properties and service life of the product.
3. Surface quality assessment: By observing and testing the surface of galvanized sheets, assess whether there are surface defects such as scratches, oxidation, and coating peeling, as well as the thickness, glossiness and other indicators of the coating.
4. Application prospects of galvanized sheets
Galvalume sheets have excellent corrosion resistance, mechanical properties and decorative properties, and are widely used in construction, home appliances, automobiles and other fields. With the development of the economy and people's increasing requirements for environmental protection, the application prospects of galvanized sheets will be broader. In the future, galvanized sheets will continue to introduce new ones to meet the needs of different industries and fields.
Application fields of Galvalumed Steel Coil
The surface of the Galvalumed steel plate has a unique smooth, flat and gorgeous star flower, and the base color is silver-white. The special coating structure gives it excellent corrosion resistance. The normal service life of Galvalumed sheet can reach 25 years. It has good heat resistance and can be used in high temperature environments of 315°C. The coating has good adhesion to the paint film and has good processing performance, and can be stamped, sheared, welded, etc.; Surface conductivity is very good. The advantages are as follows:
1. Corrosion resistance: Galvalumed sheet has strong corrosion resistance, with a normal service life of up to 25 years, which is 3-6 times longer than Galcanized sheet and is comparable to stainless steel. The corrosion resistance of Galvalumed sheets comes from the barrier layer protection function of aluminum and the dedicated protection function of zinc. When zinc is used to protect trimmed edges, scratches, and abraded parts of the coating, aluminum forms an insoluble oxide layer that performs barrier protection. Al-Zn alloy-coated steel coils have been subjected to outdoor exposure tests for more than 20 years in various atmospheric environments, proving that the trimming protection function of 55% Al-Zn-coated steel sheets is better than that of galvanized steel sheets and 5% Al-Zn-coated steel sheets. Better.
2. Heat resistance: Al-zinc plate has a high degree of heat reflectivity and is suitable as a roof material. Al-zinc alloy steel plate itself also has excellent heat resistance and can be used in high temperature environments up to 315 degrees.
3. Recoatability: (paint film adhesion) The Galvalumed sheet can maintain good adhesion with the paint film and can be directly sprayed or powdered without special pre-treatment.
4. Corrosion resistance after coating: After the Galvalumed plate itself is partially painted and baked, the corrosion resistance of the unsprayed parts will be slightly reduced. The function is much better than electroplated color zinc, electrogalvanized sheet and hot-dip galvanized sheet.
5. Processability: (shearing, stamping, spot welding, seam welding) Al-zinc coated steel sheet has excellent processing properties and can be punched, sheared, welded, etc. The coating has good adhesion and impact resistance.
6. Electrical conductivity: The surface of the galvanized plate is specially waxed to meet the needs of electromagnetic shielding.
Application:
Construction: roofs, walls, garages, soundproof walls, pipes and modular houses, etc.;
Automobiles: mufflers, exhaust pipes, wiper accessories, fuel tanks, truck boxes, etc.;
Home appliances: refrigerator back panels, gas stoves, air conditioners, electronic microwave ovens, LCD frames, CRT explosion-proof belts, LED backlights, electrical cabinets, etc.;
External insulation layer of heating pipeline
Others: heat insulation cover, heat exchanger, dryer, water heater, etc.
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