THE QUALITY CHARACTERISTICS
The heat resistance of ALCOSTA is excellent compared to that of zinc-coated sheet, galvannealed steel sheet, and cold-rolled steel sheet. Absolutely no changes in appearance and discoloration are observed even under extended exposure to the temperature of 450°C
the coating material transforms to aluminium-iron alloy layer so that heat resistance and corrosion resistance are preserved even if discoloration occurs. The coating maintains its sacrificial properties up to the temperature of approximately 600°C.
The alcosta is provided with exellent thermal reflectivity due to the fitness of its surface. The thermal reflectivity of ALCOSTA at 450°C reaches up to approximately 80%, and this is applied to thermal reflectors for toasters, gas ranges, oil stove, and so forth.
HIGH CORROSION RESISTANCE
The corrosion resistance of ALCOSTA is excellent due to the coating characteristics to form a thin stable oxide layer and hydroxidation layer in the air and water, respectively.
ALCOSTA is provided with excellent weatherability under severely corrosive environments as in industrial area due to its tendency to form a fine and stable oxide layer on the surface.
ALCOSTA has generally been understood being poor in formability due to the presence of brittle alloy layer between the steel and aluminium layers.But, when formability of ALCOSTA is compared with that of cold-rolled steel sheets and galvanized steel sheets, DQ and DDQ grades of ALCOSTA shows better formability than those.
Paintability of aluminium coating is better than of galvanized sheet sheet. Inorder to improve paint adhesion quality, chemical treatment is neccessary. But,POCOS`s chromate solution makes the excellent paintability without further chemical treatment.
Gas ranges, stove, microwave ovens, electric frying pans
Thermal Equiments and Automotive Applications:
Drying furnace, gas fuel tanks, Car Muffler components, exterior material, duct.
SCOPE OF MANUFACTURER
0.2mm - 2.4mm
: 500mm - 1300mm
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