Magnesium-Aluminum-Zinc alloy coated Galvalume Steel (GLX)
GLX is produced by alloying the aluminum, zinc, silicon and magnesium and then hot dipping it on a steel sheet.
It is designated to be suitable for the applications requiring high corrosion resistance.
The coated layer of GLX consists of 55% aluminum, 43.4% zinc and magnesium and 1.6% silicon.
The coated layer containing magnesium promotes generation of Simonkolleite (Zn5(OH)8CI2H2O) which stabilizes the self-sacrificial reaction of zinc.
The thin layer of Simonkolleite formed on the coated surface significantly delays corrosion of aluminum and zinc alloy coated layer.
The Al-Cr metallic compounds is formed on the interface between the material and magnesium alloy plated layer and the MgZn2-Mg2Si metallic compound, which is the corrosion resistqnce improving element, is mexed to show outstanding corrosion resistant property.
* Corrosion Resistance
The coated layer containing magnesium promotes generation of Simonkolletie which stabilize the self-sacrificial reaction of zinc. The thin layer of Simonkolleite formed on the coated surface significantly delays corrosion of aluminum and zine alloy cated layer.
The Al-Cr metallic compound is formed on the interface between the material and magnesium alloy plated layer and the MgZn2-Mg2SI metallic compound, which is the corrosion resistance improving element, is mixed to show outstanding corrosion resistant property.
* Heat Resistance
GLX offers outstanding heat resistance. Such characterstic is attributed from the high aluminum content(80% of surface volume) in the coated layer and makes it ideal for the application such as automobile muffler or electric oven which are exposed to high temperature for a long time
– Zinc plaed steel sheet: The recommended operating temperature is 230˚C or less, and discoloration is generated when it used at 250˚C or higher
– GLX: No discoloration is expected when used at 315˚C for a long period.Up to 370˚C is supported when it used intermittently.
* Heat Reflexibility
The heat reflexibility of GLX is more than twice the zinc plated steel sheet and can save energy when used as the roof material or wall material without coating
Outstanding cohesion between the coated layer and paint.
KS D 3033
AS 1397 : 2011
PRODUCT SPECIFICATION & AVAILABLE SIZE RANGE
BASE METAL SPECIFICATION
GLX COATING LAYER
Elongation on 80mm, %
ASTM SPECIFICATIONS - CHEMICAL COMPOSITIONS
STANDARD EXPORT PACKAGING