Salt is one of the most common compounds in the world. The impact of salt spray environment on metal products is second only to temperature, vibration, damp heat and sand dust environment. Metal corrosion is a spontaneous oxidation process. In the salt spray environment, it increases the chance of forming micro-batteries inside the metal, accelerates the electrochemical corrosion process, causes the metal or coating to corrode, rust, and blisters, resulting in components and fastenings. Corrosion damage to parts. The moving parts of mechanical parts and components are blocked or stuck. Therefore, salt spray test on metal parts is an important method to investigate the corrosion resistance of rubber bushing and other automotive parts.

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 rubber bushing. The salt spray test standard is a clear and specific stipulation for the salt spray test conditions, such as temperature, humidity, sodium chloride solution concentration and pH value, etc., and also puts forward technical requirements for the performance of the salt spray test chamber.