[Damon]

The longevity of metal cases largely depends on the corrosion resistance of the product's materials. An oxide film forms on the surface of aluminum sheets immediately after they leave the forming line. Its presence protects the metal against corrosion traces due to high humidity and prolonged contact with water. Steel is much inferior to aluminum in terms of corrosion resistance. Therefore, chromium and nickel are added to such raw materials at the melting stage, which turns the alloy into stainless steel. Nevertheless, I would give preference to steel materials. For example, I recently bought one at https://www.scrooz.com.au/hardware/joist-hangers/.