Method for judging surface chromium metal content of chromium-plated plate
A surface metal and determination method technology, which is applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of not being able to measure the level of chrome plating on the surface, polluting the environment, and cumbersome operations, etc., to achieve Measuring the effect of convenience and quickness
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Embodiment 1
[0045] Judgment of the amount of chrome plating on the front and back of the chrome-plated plate
[0046] Cut the chrome-plated plate into 12cm-long and 5cm-wide chrome-plated plate samples, soak the chrome-plated plate sample in 100mL 90℃ 300g / L NaOH solution for 20min, take out the chrome-plated plate sample, rinse it three times, dry it, and remove the chrome-plated plate Chromium oxide layer on the surface of the sample.
[0047] The two sides of the chrome-plated plate sample are respectively recorded as a-side and b-side, and the jump potential ΔE of the chrome-plated plate in the range of 5cm×5cm is measured on both sides. Surface a starts from the bottom of the chrome-plated plate sample, and takes the range of 5cm in length and 5cm in width as the area to be measured. The surface of the chrome-plated plate sample is coated with silicone rubber within the range of length greater than 5cm and less than 10cm from the bottom, and sealed. Among them, there is a distance o...
Embodiment 2
[0052] The determination of the amount of chrome plating in different areas on the same surface of the chrome-plated plate.
[0053] Cut the chrome-plated plate into 7cm×5cm chrome-plated plate samples, soak the chrome-plated plate sample in 100mL 90℃300g / LNaOH solution for 20min, take out the chrome-plated plate sample, rinse it three times and dry it, then remove the chrome-plated plate sample Surface chromium oxide layer.
[0054] In the 2cm area from the top of the chrome-plated plate sample, no silicone rubber is used for conductivity. Take an area of 1cm×1cm from the top, middle and bottom of the board for testing, and seal other parts with silicone rubber, see image 3 , where 1, 2, and 3 are the areas of the sample to be tested, and 4 is the connection between the electrolytic clamp and the sample. The electrolysis reaction proceeds sequentially from the bottom to the top. Specifically:
[0055] 1) Soak the area to be tested at the bottom of the chrome-plated pla...
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