Method For Distinguishing Pure Nickel From Nickel Plated Sheets

Method 1
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Color identification method
Use a sharp blade to scrape the connector about 5-8 times and observe the color of the scraped surface of the connector. If it looks golden or golden red, then the connector is a nickel plated copper sheet.

Method 2
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Specific gravity method
Under the same size and volume, pure nickel connectors and nickel plated iron connectors are approximately 1.15 times larger. Nickel is heavier than nickel plated iron and can be distinguished by weight using an electronic scale.

Method 3
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Chemical identification method
Take a glass, add half a tablespoon of refined salt, add warm water to melt into salt water, cut into several connecting pieces and put them in. Let it stand for four to five hours and observe the color of the saltwater. The light green one is nickel plated copper sheet; Yellow plated iron sheet; Pure nickel sheet refers to nickel sheet that does not change color or slightly turns yellow (due to different purities, pure nickel sheet contains a small amount of impurities, such as iron)

Method 4
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Resistance measurement method
Use a 4-digit multimeter (with a minimum resolution of 0.01 Ω) to measure the resistance value of a few meters long connector (compared to the resistance values that can be measured within the range of the multimeter). Compare different types of connectors with the same thickness, width, and length. The lowest resistance value is pure nickel sheet, and the highest resistance value is nickel plated sheet. The resistance value of nickel plated iron sheet is about 1.4 times that of pure nickel sheet.

Method 5
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Visual discrimination method
The production process of pure nickel plate does not require electroplating technology, so its surface is relatively clean and smooth, but the color is slightly dull; After electroplating treatment, the surface of the nickel plated plate presents slight sand patterns and a shiny silver white color.