In the electroless nickel plating process, the hardness of the plated layer is an important assessment index, which is related to the electroless nickel plating products can be sustainably applied in industrial production, so what are the methods of plating layer hardness testing? This issue of the article we will introduce two methods.
Method one:
In the electroless nickel plating process, many people use the Vickers hardness tester as a hardness test method to evaluate the hardness of electroless nickel plated layers.
How does this work? It determines the hardness value of a coating by applying a certain load to the surface of the sample and then measuring the dimensions of the indentation. Vickers hardness testers are suitable for different types of plating, in addition to chemical nickel plating, they can also be used for hardness testing of the following types of plating:
1. Electroplated nickel layer: with sufficient thickness and a wide range of hardness, the plating is widely used for wear protection and corrosion prevention of mechanical parts.
2. Electroplated chrome layer: Mainly used for parts requiring high wear and corrosion resistance, such as automotive parts, tools and molds.
3. Electroplated copper layers: Used in circuit boards and electronics, measuring their hardness can help assess the quality and wear resistance of the plating.
Method two:
A hardness tester is also a hardness measuring device often used in electroplating plants. It can evaluate the hardness of a coating by different measurement methods, such as these three:
①Indentation method
②Elastic deformation method
③Sound velocity method
The hardness tester can provide quantitative hardness values to help electroplating factories and other organizations to evaluate the hardness and wear resistance of the coating. In practice, to choose the appropriate hardness tester method for measurement, you need to be based on their own plating material is how to do, as well as testing needs to make a judgment.
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