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There are many different metal alloys that can be used in a wide variety of engineering applications. Each has unique properties that determine the strength, durability, longevity, and functionality of a particular product. These properties may be influenced by the alloy’s melting temperature, the casting process it goes through during manufacturing, the product’s target precision, and more.
The alloys are chosen based on their ability to meet the desired production characteristics, including moldability, corrosion resistance, thermal expansion, and tensile strength. A common alloy is aluminium zinc, which is commonly used in manufacturing electrical panels and doors, window frames, and roofing. These products are ideally suited for coastal environments, hurricane zones, and other locations with harsh weather conditions.
Both aluminium and zinc can be used for sacrificial anodes in salt water environments. However, aluminium has several advantages over zinc, making it a better choice for marine environments.
Aluminium anodes have a higher electrochemical capacity than zinc (you can protect more with less), and their driving voltage is much higher, meaning that they can produce more current. They also don’t contain cadmium, which is harmful to the marine environment.
Compared to galvanized steel, an aluminium-zinc roof will last at least twice as long, allowing you to achieve your desired lifecycle for your building. The aluminium-zinc finish also helps to improve the corrosion resistance of your roofing system, which is why GERARD offers a 50-year warranty for its aluminium-zinc coated roofs. This is one of the longest warranties in the industry.