How to prevent rusting of aluminum sheets in outdoor environments?

To prevent rusting of aluminum sheets in outdoor environments, it's crucial to understand that aluminum doesn't rust but forms a thin layer of aluminum oxide, which can darken the surface. To protect aluminum sheets, use protective coatings such as clear anodizing, which enhances the natural oxide layer, or apply a paint or powder coating. Regular cleaning and maintenance can also help in removing dirt and grime that can accelerate the oxidation process. Additionally, using stainless steel fasteners and avoiding contact with dissimilar metals can help prevent galvanic corrosion.