The difference between Prepainted galvanized sheet and aluminized sheet

Prepainted galvanized sheet is to prevent corrosion of steel surface and prolong its service life. The surface of the steel plate is coated with a layer of metal zinc, which is called galvanized steel.

Aluminized sheet, also known as aluminized steel sheet. It is also called aluminized sheet or hot-dip aluminized sheet. Aluminized steel plate is a steel plate coated with an aluminum-silicon alloy, in which the aluminum content is 90% and the silicon is 10%. Aluminized steel sheet has good heat resistance, heat reflection and corrosion resistance, and its mechanical and physical properties are better than cold-rolled steel sheet. Due to the superior properties of aluminized steel sheet, it has been widely used in our daily life. Such as car mufflers, household appliances, etc.
The aluminized steel sheet is called "hot-dip aluminized steel sheet", which is similar to the hot-dip galvanized steel sheet in the manufacturing process. But its heat resistance is better than that of color-coated galvanized steel.
High temperature resistance: Due to the special combination of the steel substrate and the coating structure, an iron-aluminum alloy is formed, so that the aluminum plate has excellent high temperature resistance performance. At 450°C, high reflectivity is guaranteed. When the temperature is higher than 480°C, the appearance of the coating becomes gray. When the temperature is as high as 650°C, the protective layer to prevent the oxidation of the steel sheet is still well preserved and no peeling can be seen.
Heat reflectivity: At a high temperature of 480 degrees Celsius, the aluminum plate can reflect 80% of the incoming heat. Therefore, the aluminized sheet can be made into an efficient thermal insulation barrier or heat reflector in high temperature applications, and the temperature in the furnace can be rapidly increased through effective heat reflection.
Mechanical strength: At room temperature, the mechanical strength of the aluminized sheet is consistent with the mechanical strength of its base material. At the same high temperature of 480°C, the strength of aluminized steel plate is 10 times that of aluminum plate, so the thickness of the steel plate can be reduced by at least 30%.

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