Corrosion testing is a method used to evaluate how materials, especially metals, deteriorate when exposed to environmental factors like moisture, salt, and chemicals. This testing helps predict the lifespan of materials in various conditions, ensuring safety and reliability in applications such as construction and manufacturing. There are several techniques for corrosion testing, including salt spray testing, electrochemical testing, and immersion testing. Each method simulates different environments to assess how quickly and severely corrosion occurs. The results guide engineers and manufacturers in selecting appropriate materials and protective coatings to minimize corrosion-related damage.