The phosphorus content in chemical nickel plating is mainly categorized into high phosphorus, medium phosphorus and low phosphorus, which are different in performance and application.
Author: Anna
The phosphorus content in chemical nickel plating is mainly categorized into high phosphorus, medium phosphorus and low phosphorus, which are different in performance and application.
High-phosphorus electroless nickel plating: High-phosphorus electroless nickel plating layer usually contains high phosphorus content (more than 7%), this kind of plating layer has excellent corrosion and oxidation resistance, and it is suitable for high-temperature or oxidizing environment. In addition, high-phosphorus electroless nickel plating layer in many corrosive media show better resistance, while its hardness will be slightly reduced with the increase of phosphorus content. High-phosphorus electroless nickel plating is amorphous and does not have any crystal interstitials on the surface, which gives it better performance in some applications.
Medium Phosphorus Electroless Nickel Plating: Medium phosphorus electroless nickel plating has a phosphorus content between high phosphorus and low phosphorus. This type of plating has a moderate performance in terms of hardness, corrosion resistance, and magnetism, and is suitable for applications that require a balance between hardness and corrosion resistance.
Low-phosphorus electroless nickel: Low-phosphorus electroless nickel plating has a low phosphorus content (less than 7%), which provides a high level of hardness and is suitable for applications requiring high wear resistance. Low-phosphorus electroless nickel plating layers have better corrosion resistance in alkaline media and may be somewhat magnetic in some cases.
In summary, the choice between high, medium or low phosphorus electroless nickel plating depends on the specific needs of the application, such as corrosion resistance, wear resistance, hardness, and the need for non-magnetic or low magnetic properties.