Why does the connector need to be tested in the salt fog environment

Salt spray environment mainly refers to the application environment of medical device connector, electric vehicle connector and underwater application equipment. Under normal circumstances, salt spray environment refers to the salt spray environment formed by 5% salt solution. Usually, this kind of environment can effectively assess the equipment or components directly exposed to sea or land salt environment, which is not the real environment. The normal exposure time is between 48 hours and 96 hours.

Salt spray test is usually used in underwater environment and to evaluate the corrosion resistance of metal connector shell (for example, simple ox horn needle seat to verify the corrosion resistance of nickel coating on zinc alloy die casting). By checking DWV and insulation resistance to confirm the performance of exposed parts, so as to make the enclosure sealing effective.

Salt spray tests are sometimes used to evaluate automotive connectors. When a car or truck is moving, these board to board connectors may come into contact with the water splashed on the tires, especially after the snow in northern China in winter, the roads will be coated with salt to accelerate snow melting. In general, the corrosion resistance of these connectors shall be verified by salt spray test. The verification standard is to check the reliability of the contact resistance, not to evaluate by checking the appearance. In many cases, these connectors should be used with sealing rings to improve their salt spray resistance.

In general, the development of digital terminal connector is characterized by high-speed plug-in and plug-in, low-cost and modular signal transmission. The above technologies represent the development direction of connector technology, but it should be noted that the above simple bracket technology is not necessary for all connectors, and the requirements for the above technologies are completely different for connectors in different support fields and different use environments.