Why Does the Plug of the USB Data Cable Rust After Not Using It for a Long Time?

The phenomenon that the plug of the USB data cable is easy to rust is directly related to the electroplating layer of the plug of the USB data cable. If the electroplating layer on the metal surface of the USB plug can reach the standard thickness and quality, it is not easy to rust. If the plating layer is poor, it is easy to rust. The quality of the electroplating layer is a measure of the ability of the metal surface to resist oxidation and rust.

The ability of the electroplating layer to resist oxidation and rust is stipulated in the industry to conduct a salt spray test to classify it. Conventionally, there are 8-hour salt spray test, 12-hour salt spray test, 24-hour salt spray test, and 48-hour salt spray test. The longer the salt spray test time, the stronger the ability to resist oxidation and rust, and it is not easy to rust.