PPGL steel substrate aluminum-zinc steel contains 55% aluminum, 43.4% zinc and 1.6% trace elements.
PPGL steel has strong corrosion resistance and good decorative properties. It is a widely used building material, especially in roofs and walls. This article mainly introduces the production process, use, price and other information of PPGL steel.
PPGL full form is “Pre-painted Galvalume”, which is a pre-coated 55% aluminum-zinc alloy steel plate.
The raw materials of ppgl steel include: DX51D, DX52D, DX53D, SPCC, SPCD, Q235, DC01, DC02, etc.
The production process of ppgl steel (Pre-painted Galvalume Steel) can be divided into two major sections: the production of aluminum-zinc coated steel sheets and the paint coating process.
Main processes: cleaning → annealing → hot-dip aluminum-zinc → flattening → tension straightening → chemical treatment → surface inspection → oiling, etc.
Remove the rolling oil remaining on the surface of cold-rolled steel and other surface dirt by mechanical brushing and electrolytic cleaning.
Recrystallize and anneal the cold-rolled steel that has been hardened after cold rolling to improve the microstructure and adjust the material properties.
The coating thickness is controlled by an air knife. After the cold-rolled steel comes out of the zinc pot (55% aluminum, 43.4% zinc, etc.), it is induction heated to about 500°C for insulation to convert the zinc layer into an alloy phase.
Flattening refers to rolling with a small deformation rate, which is to eliminate the material yield platform, improve the material mechanical properties, and improve the plate shape and surface quality.
Further leveling the corrugated shape of the strip to obtain better straightness.
Apply a passivation or fingerprint-resistant coating on the surface of the coating, and perform drying and cooling treatment to achieve a surface treatment process that prevents rust and has conductivity, lubrication or other functions.
Perform dimensional inspection, plate shape inspection and surface quality inspection, and record them.
Pretreatment is carried out after aluminum zinc plating. The pretreatment process is an effective means to improve the bonding force between the substrate and the coating.
The color coating unit generally uses roller coating to apply the coating on the steel surface. Roller coating is a coating method that first forms a wet film of a certain thickness on the roller and then transfers this layer of coating to the surface of the strip.
For the curing of the coating, the coated steel plate is sent into the curing furnace, and the coating is cured by chemical condensation, addition polymerization, cross-linking and other reactions through solvent evaporation to form a hard, wear-resistant and corrosion-resistant coating.
After curing, subsequent processing technologies include coating embossing, metal embossing, printing, laminating and other treatment methods. A protective film can also be applied or added to prevent PPGL steel from being scratched during transportation.
PPGL steel is widely used in construction, home appliances, transportation, home appliances, industrial equipment and other fields due to its good weather resistance, strong corrosion resistance and easy processing.
Comparison table of advantages and disadvantages of PPGL steel and PPGI steel
PPGI | PPGL | ||
Advantages | Disadvantages | Advantages | Disadvantages |
Widely used: PPGI steel is widely used in construction, home appliances, automobiles and other fields, especially its good anti-rust performance and beautiful appearance make it the preferred material for building wall panels, roofs, warehouses, shopping malls and other buildings. | Relatively weak corrosion resistance: Although PPGI steel is also very corrosion resistant, its corrosion resistance is not as good as PPGL steel in some extreme environments. | Strong corrosion resistance: PPGL steel galvanized coating has excellent corrosion resistance and can maintain long-term use in harsh environments such as humidity and salt spray. | Higher price: Since the base material of PPGL steel, galvanized steel, is relatively expensive, the production cost of PPGL is relatively high. |
Low cost: Compared with other corrosion-resistant steels, PPGI steel has a lower cost and is suitable for large-scale applications. | Good processing performance: PPGL steel has excellent processing performance and can meet various complex processing requirements. | The color is limited, and there are not as many colors as PPGI. | |
Various colors: The surface of PPGI steel can be sprayed with paint of various colors, and the color selection of Wanzhi color-coated steel is based on the RAL color card. | Longer life: The life of PPGI is 20-30 years, and the life of PPGL is 2-3 times that of PPGI, with a longer service life. |
As can be seen from the above table: Both have their own advantages and disadvantages. Which one to choose depends on where you use it? What is the budget?
PPGI steel is more suitable for ordinary environments and has certain requirements for cost. PPGL steel has a wider application environment. If it is a harsh environment such as humidity and salt spray, it will be better to use PPGL steel.
The price of ppgl steel will be affected by factors such as raw materials, market supply and demand, specifications, zinc layer thickness, paint type, quantity, etc. The price will change every day. The reference price of ppgl steel is US$580-900 per ton.
Wanzhi Steel is a factory. The ppgl steel sold is the factory wholesale price. The more the quantity, the cheaper the price. Wanzhi ppgl steel’s value-added services also include punching, profiling, cutting, printing, etc.
Wanzhi ppgl steel is exported to many countries, such as Turkey, Russia, Libya, Spain, Kenya, Peru, etc. If you are interested in ppgl steel, you are welcome to contact us at any time.
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