Analysis of the reasons why the cold-pressed terminal is oxidized and rusted:
Because the surface of the cold-pressed terminal is relatively rough, and the hole is thick and fine, it causes a serious potential difference, which obviously speeds up the shelf life of the cold-pressed terminal, and causes serious oxidation points on the surface of the terminal. Crushing, or forming a low-voltage current area during electroplating, the oxidation resistance of the final crushing is obviously reduced; the latter is that the cold-pressed terminal is defective during processing, or there are more acidic substances on the surface .

The measures to prevent the cold-pressed terminal from being oxidized and rusted:
When stamping and forming the cold-pressed terminal, the surface must be sufficiently smooth, and there must be no crushing and scars. After the standardized treatment of the cold-pressed terminal, it must be inspected and maintained regularly .
Three conventional connection methods to ensure the connection safety of the terminal
1. The solder connection method of the terminal:
In the solder connection mode of the terminal, the main thing is the tin wire and the surface to be soldered. There should be a continuity of the metal between them. Therefore, for the terminal, the main thing is the solderability. The more common coatings are silver, alloy and gold.
2. Riveting connection method of terminal block:
The main purpose of crimping is to ensure that the terminal can be compressed within the specified limits, or the displacement is to directly connect the wires. If it is a relatively high-quality crimping, it can ensure that the metal will not flow in mutual dissolution, and it can also Ensure that there is no deformation of the material between the wire and the contact.
This method is more suitable for cold welding connection, which can achieve good mechanical strength and electrical continuity, and can be used in harsher environments. At present, the more commonly used connection method should be crimping, especially suitable for It is used when the current is relatively large, and professional tools must be used when crimping.
3. Piercing connection method of terminal block:
The connection method of this kind of PCB terminal can also be called insulated displacement connection. It is reliable and high in performance, and the cost is very low. The main thing is that it is very convenient to use and is more suitable for connecting ribbon cables. , And when connecting, there is no need to peel off the insulation layer in the cable, just use the pointed end of the bullet to penetrate it.