What are the reasons for salt spray testing of board-to-board connectors?

Salt fog environment mainly refers to the application environment of medical device connectors, electric vehicle connectors and underwater. The salt spray environment under normal conditions refers to the salt spray environment formed by 5% salt solution. Generally, this environment can be used to effectively evaluate the equipment or components directly exposed to salt and other environments. It is not a real environment, and the normal exposure time is between 48 hours and 96 hours. Salt spray testing is commonly used in underwater environments and is often used to evaluate the corrosion resistance of metal connector housings (e.g., to verify the corrosion protection effect of a nickel coating on a zinc-clad die-cast surface). The effectiveness of the housing seal is confirmed by checking the DWV and insulation resistance to confirm the performance of the exposed part. The salt spray test is also sometimes used in the evaluation of car connectors. When a car or truck is walking, these board-to-board connectors may be in contact with water splashed from a ship. Especially in the northern winter, after snow, salt is applied on the highway to speed up the melting of snow. These connectors are generally subjected to salt spray test to verify their corrosion resistance, and the verification standard is also to check the reliability of contact resistance, rather than to check the appearance. Many times these connectors are used with a seal ring to improve their salt spray resistance.

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