Schemc
Galvalume is a coating consisting of zinc, aluminum and silicon that is used to protect a metal (primarily steel) from oxidation. It is similar to galvanizing in that it is a sacrificial metal coating which protects the base metal.
Galvalume is primarily used to protect iron-based alloys that are prone to rust. Galvalume-coated steel is better able to resist oxidation than plain carbon steel because the zinc and aluminum protect the underlying steel from the environment. The zinc also will more readily oxidize than the steel it contacts. This is similar to galvanized steel.
Galvalume is applied to a material using the hot-dipping process. Therefore, a Galvalume coating has similar thicknesses to that of hot-dipped galvanized material. The thickness for the hot-dipping process is around 1 mil thick. The thickness can range somewhat depending on the coating specification. If the coating thicknesses of a Galvalume-coated steel and a galvanized steel are equal, the Galvalume steel will generally outlast the galvanized one, depending on the environment.
Galvalume coating is most commonly applied to carbon steel. However, most materials that can be galvanized can also be coated with Galvalume. Some additional metal types include:
Coated steel sheet for a new age - economical, featuring excellent corrosion resistance, heat resistance, heat reflectance, and workability.
GALVALUME steel sheet can be worked and painted afterwards just like galvanized steel sheet.
The main difference between galvanizing and Galvalume is that galvalume is a combination of zinc, aluminum, and silicon, while galvanizing is 100% zinc. The makeup of the three elements in a Galvalume coating is just over 50% aluminum, just under 50% zinc, with trace amounts of silicon.
An advantage that Galvalume has over normal galvanized material is that it has enhanced protection abilities. Over time, Galvalume tends to perform better than galvanized steel, especially when exposed to water or other liquids that can speed up the oxidation process. Even after a few decades, Galvalume-coated steel will be less likely to rust than normal galvanized steel.
Galvalume is also considered more aesthetically pleasing than hot-dipped galvanized materials.
GALVALUME has terrific reflectivity, of both heat and sunlight. Ideally, you would use bright white pre-painted panels for maximum reflectivity. It will efficiently reflect away the sunlight, reduce the heat transmitted to the building, and keep it much cooler inside. Your electricity bill should show substantial savings.
