Manufacturers have implemented the act of adding a zinc coat to the steel sheets (galvanizing) to help prevent the sheets from rusting. When oxygen and water come into contact with iron, it forms a combination called iron oxide which will cause your metal steel roof to start rusting. Ungalvanized steel metal sheets will rust as they contain iron. Steel metal sheets are the most affordable of the lot, and they have an expected lifespan of up to 30 years and more. Steel, copper, aluminum, and tin are usually used in sheets for roofing. This article will share the methods you can use and offer alternative options if you are not a DIY person by nature. For in-store display of panels, visit All American Do it Center in Tomah, Sparta, or Richland Center Wisconsin.When you have the right ingredients that promote oxidation, a little time on your hands, and the simple yet effective ways that I am about to share with you, then rusting a galvanized roof should be easy and fun to do. Contact us Today About Galvanized or Galvalume Metal PanelsĬontact the team at All American Steel to get an order placed, or feel free to ask us questions about our products or how to install metal panels. Most Galvalume®– like galvanized steel – is coated. Galvalume is offered in both bare and pre-coated versions. In conclusion, Galvalume® is more corrosion-resistant than galvanized steel, but because aluminum provides barrier protection instead of galvanic protection, scratches and cut edges are less protected. Corrosion Resistance in both Galvanized and Galvalume Metal Panels Galvalume metal panels will not breakdown completely, as opposed to galvanized metal. While Galvanized metal corrodes in a linear fashion and eventually depletes the zinc coating, Galvalume, on the other hand experiences some corrosion, but on a less significant level. Any corrosion that occurs does so within these open particle areas. The aluminum additive, along with the zinc, allows small particle areas to form within the coating. Galvalume is a product engineered specifically to be a long term roofing and siding material. It has the corrosion resistance and heat reflectivity characteristic of aluminum coatings, with the formability and galvanic protection of cut edges’ characteristic of zinc coatings. The alloy coating of aluminum and zinc combines the best properties of both metals. Galvalume is the trade name for this patented sheet steel product. The composition of the corrosion-resistant coating is 55% aluminum, 43.5% zinc and 1.5% silicon. This is done to protect it from oxidation. Galvalume metals are made with steel panels having a coating of corrosion-resistant, aluminum-zinc alloy, which is applied by a continuous hot dip process. The zinc coating begins to corrode at any exposed cut edge, and over time it completely corrodes the surface of the steel. This initial appearance begins to deteriorate, and it does so fairly quickly. Initially, galvanized metal maintains its appearance even better than Galvalume metal panels. This corrosion isn’t immediate with galvanized metal. Galvanized metal may begin to breakdown within 10 to 15 years of element exposure. If corrosion or rust take place, it will eventually weaken the metal, and the elements that create the steel will eventually be broken down. ![]() The zinc is applied to protect the steel from the elements that could lead to corrosion and rust. Galvanized metal is a sheet of steel that has been coated with a thin layer of zinc oxide. Those options are Galvanized and Galvalume Metal Panels. Here’s something you may not have known: Metal Roofing and Siding actually has two different types of material that can be used.
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