1. In order to verify whether the metal parts on the finished product will corrode in contact with the atmosphere or other natural environment, the finished product can be placed in the natural environment for a long period of time, such as a life cycle of the finished product. This is time-consuming and laborious and is rarely used in practice.
2. Salt spray test is a kind of artificial atmosphere accelerated corrosion resistance assessment method. It is to atomize a certain concentration of salt water, and then spray in a closed incubator, by observing the changes in the measured sample after a period of time in the box to reflect the corrosion resistance of the measured sample. It is an accelerated test method that takes a short time, does not take several years, and only takes a few days or even hours.
3. This requires a convenient way to assess the corrosion resistance of the finished product.
Salt spray corrosion will damage the metal protective layer, making it lose its decorative properties and reduce mechanical strength; Some electrical components and electrical circuits, due to corrosion caused by power line interruption, especially in the natural environment with vibration, especially serious; When the salt spray falls on the surface of the insulator, the surface resistance will be reduced; After the insulator absorbs the salt solution, its volume resistance will be reduced by four orders of magnitude.