Salt spray testing is a method used to evaluate the corrosion resistance of materials and coatings. In this test, samples are exposed to a saline solution in a controlled environment, simulating harsh conditions that can lead to rust and degradation. The results help manufacturers understand how their products will perform over time. This testing is commonly used in industries such as automotive, aerospace, and construction, where durability is crucial. By assessing how well materials withstand salt exposure, companies can improve their designs and select better protective coatings, ultimately enhancing the longevity of their products.