The Rebar Couplers should first be considered corrosion protection. Most electrical Rebar Couplerss are made of copper alloy, and copper alloys are susceptible to corrosion, such as oxidation and vulcanization, in a typical electrical Rebar Couplers working environment. In fact, the contact plating is used to close the contact shrapnel from the working environment to prevent corrosion of copper. Of course, the coating material must not be damaged (at least within the harmful range) in its working environment. As an important function of corrosion protection, the optimization of the interface is to select the appropriate contact coating material considerations.
The parameters related to mechanical properties are primarily factors that affect the durability or wear of the coating and the forces of the coating. These factors to consider are two different views under the same basic effect, that is, the multi-point contact interface is shared during the relative movement of cold welding. The most important mechanical properties include hardness, ductility and friction coefficient of the coating material. All of these properties depend on the intrinsic nature of the coating material and the course of its work.
The optimization of the electrical properties can be considered from the viewpoint that the control of the film on the surface of the contact coating is already present and is to be formed. One of the major requirements for electrical performance of electrical Rebar Couplerss is to establish and maintain a stable Rebar Couplers impedance. To achieve this, a metal contact interface is required to provide such inherent stability. The establishment of such a contact interface requires that the surface film be able to avoid or split at the time of contact fit. These two different options define the difference between precious metals or rare metals and ordinary metals.
To varying degrees, the precious metal coatings (such as gold, palladium, and their alloys) are essentially free of surface film. The contact of the metal for these coatings is relatively simple, since it only requires the movement of the associated surface of the contact surface during mating. Usually it is easy to implement. In order to maintain the stability of the contact interface impedance, the Rebar Couplers design requirements should be kept in contact with the surface of the precious metal to prevent external factors such as pollutants, substrate metal diffusion and contact wear effects.
Ordinary metal coating, especially tin or tin alloy, its performance are naturally covered with a layer of oxide film. The effect of tin contact plating is that this layer of oxide is easily destroyed during mating, so that metal contact is easily established. The need for an electrical Rebar Couplers design is to ensure that the oxide film breaks when the Rebar Couplers is mated and that the contact interface is no longer oxidized during the term of the interlocking device. Re-oxidation corrosion, in the wear and tear corrosion, tin is the most important performance degradation coating mechanism. The silver contact plating is preferably treated as an ordinary metal coating because the coating is susceptible to corrosion of sulfides and chlorides. As the formation of gas by the valve is usually the nickel coating as a common metal.