Salt spray test is a kind of environmental test which mainly uses artificial simulated salt spray environment conditions created by salt spray test equipment to evaluate the corrosion resistance of products or metal materials.

The standard of salt spray test specifies the conditions of salt spray test, such as temperature, humidity, concentration of sodium chloride solution and pH value. In addition, the technical requirements for the performance of salt spray test chamber are put forward. The judgment methods of salt spray test results include: rating method, weighing method, corrosives appearance judgment method and corrosion data statistical analysis method. The products that need salt spray test are mainly some metal products. The corrosion resistance of the products is investigated by testing.