Salt spray test is an environmental test that mainly uses artificially simulated salt spray environmental conditions created by salt spray test equipment to assess the corrosion resistance of products or metal materials. It is divided into two categories, one is the natural environment exposure test, and the other is the artificial accelerated simulated salt spray environment test. The artificial simulated salt spray environment test is to use a kind of test equipment with a certain volume space-the salt spray test box, in its volume space, artificial methods are used to create a salt spray environment to assess the quality of the salt spray corrosion resistance of the product .
Compared with the natural environment, the salt concentration of chloride in the salt spray environment can be several times or tens of times the salt spray content of the general natural environment. For example, if a product sample is tested in a natural exposure environment, it may take 1 year for its corrosion, while the test under artificially simulated salt spray environment conditions requires only 24 hours to obtain similar results.