Nickel sulfamate plating process is widely used in machinery, electronics and other fields, but in some cases, we will find that the nickel layer after plating is not hard enough, which affects the wear resistance and service life of the parts. How to solve this problem effectively? This article combines relevant research and Bigely Technology technical service experience to provide you with some effective solutions.
1. Optimization of current density
In nickel sulfamate plating process, the current density has a direct effect on the hardness of the plated layer. Higher current density increases the hardness of the plated layer. This is because at high current density, the grain size in the plating layer decreases, thus enhancing the hardness. Therefore, increasing the current density is an effective way to improve the hardness of the plated layer, but it needs to be controlled within a reasonable range to avoid problems such as roughness or cracking of the plated layer.
2. Adjustment of plating solution composition
The composition and proportion of plating solution have a direct influence on the quality of plating layer. Appropriate amounts of nickel sulfate and sulfamic acid are beneficial to improving the hardness of the plated layer. At the same time, it is also vital to maintain the stability and purity of the plating solution. Impurities and contaminants can lead to plating defects and reduce the hardness of the layer. The composition and ratio of the plating solution have a direct impact on the quality of the plated layer. Appropriate amount of nickel sulfate and sulfamic acid is beneficial to improve the hardness of the plated layer. At the same time, it is also vital to maintain the stability and purity of the plating solution. Impurities and contaminants can lead to plating defects and reduce hardness.
3. Control of plating process parameters
Process parameters such as temperature and pH are also important for the performance of the plated layer. Controlling the plating temperature at 45-60°C and maintaining the solution pH at 3.5-4.5 can improve the uniformity and hardness of the plated layer. In addition, the plating time should also be properly controlled to ensure the thickness and quality of the plated layer.
4. Use of thick nickel layer process
The use of multi-layer plating process can improve the comprehensive performance of the plating layer. By plating several times on top of the base layer, the thickness of the plating layer is gradually increased, which helps to improve the hardness and abrasion resistance.
Conclusion
In the use of nickel sulfamate additives, to solve the problem of insufficient hardness of nickel sulfamate plating coatings need to comprehensively consider the current density, plating solution composition and other process parameters and other factors, through the optimization of the above methods, can effectively improve the hardness of the plating layer to meet the needs of various engineering applications.
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