Electroless nickel plating is a widely used surface treatment technology that provides materials with excellent corrosion resistance and good mechanical properties. However, the performance of the plated layer does not only depend on the nickel plating process itself, but the post-plating treatment process is also an indispensable part. In this paper, we will discuss the post-processing of electroless nickel plating, including passivation, dehydrogenation of the plated layer and heat treatment, and illustrate how electroless nickel concentrate Ni-809 improves the quality of the plated layer.
First of all, passivation is an important post-plating process. Chromate passivation treatment can improve the corrosion resistance of the coating. The passivation film can effectively isolate the erosion of the coating from the external environment, thus extending the service life of the coating. This not only improves the durability of the product, but also reduces later maintenance costs. The passivation agent DH-1 is specially formulated in Bigely electroless nickel plating post-treatment process, which is conducive to the uniform formation of passivation film and further improve the passivation effect.
Secondly, the dehydrogenation of the plated layer is also crucial to prevent hydrogen embrittlement. Hydrogen embrittlement is a phenomenon in which hydrogen atoms penetrate into the base material during nickel plating, causing the material to become brittle. Especially in carbon steel materials, the need for hydrogen removal treatment is more prominent. The risk of hydrogen embrittlement can be reduced by allowing the hydrogen atoms embedded in the material to escape through appropriate heating treatments.
Heat treatment is also one of the important means to enhance the performance of electroless nickel plating layer. Especially for materials such as aluminum-lithium alloys, heat treatment can improve the wear resistance and hardness of chemical nickel-phosphorus plating layers. During heat treatment, the crystalline phase in the plating layer undergoes a transformation, which increases the hardness and wear resistance of the layer.
In addition, reasonable heat treatment of the plating layer can also reduce the internal stress and improve the adhesion and comprehensive performance of the plating layer. After plating with electroless nickel concentrate Ni-809 and heat treatment, the hardness of the plated layer can reach 850-950 HK100.
Conclusion
In summary, passivation, dehydrogenation and heat treatment are important processes for post-treatment of electroless nickel plating, each of which has its own advantages and can enhance the overall quality of the plated layer. When using Bigely electroless nickel concentrate Ni-809, we can selectively adopt the corresponding post-treatment process according to the performance requirements of the plated product to further improve the corrosion resistance, hardness and other properties of the plated layer.
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