Pyrophosphate system brass-plated tin alloy plating liquid and electroplating process
A technology of pyrophosphate and electroplating process, which is applied in the field of alkaline electroplating brass tin, which can solve the problems of insufficient complexation and insufficient crystallization, and achieve the effect of good coating appearance, low cost and strong corrosion resistance
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Embodiment 1
[0024] Present embodiment uses plating solution of the present invention to carry out electroplating to brass sheet, and its operation process is as follows:
[0025] 1. Weigh 260g / L K 4 P 2 o 7 ·3H 2 Divide O into two beakers equally, add a small amount of distilled water, stir with a magnetic stirrer until completely dissolved; then add Cu to the two beakers respectively 2 P 2 o 7 ·3H 2 O and Sn 2 P 2 o 7 Solid, stir quickly until the solution in the two beakers becomes clear; finally, mix the solutions in the two beakers and pour them into a 1L beaker, and slowly neutralize the solution with phosphoric acid solution under stirring conditions until the pH reaches 8.5-9.0, leave it for a while, etc. After the plating solution turns dark blue and clear, dilute to volume with pure water;
[0026] 2. Use a 1mL pipette to pipette 0.8mL of additives into the above solution, stir with a magnetic stirrer for a while, and set aside;
[0027] 3. Use a 250mL measuring cylind...
Embodiment 2
[0029] The difference between this embodiment and embodiment 1 is that step 3 is replaced by: use a 250mL graduated cylinder to measure the plating solution in 2 to a 500mL square tank, use phosphor copper as the anode, and the polished brass sheet as the cathode, and the current is 0.5A, ventilation and stirring, electroplating for 40 minutes to obtain a bright golden yellow copper-tin alloy coating. Rinse the test piece after plating with water and put it into the passivation solution for a while to passivate, then wash and dry it. Use a JSM-6510 scanning electron microscope to observe its surface morphology, and use the attached INCA X-ACT energy spectrometer to test its element content. Scanning electron microscope pictures see figure 1 , and its multiple is 1000 times. For the test area in the spectrometer test, see figure 2 , The sample element composition (weight) obtained by energy spectrometer analysis is: Cu 87.77%, Sn 12.23%. image 3 It is a micrograph of 200 ...
Embodiment 3
[0031] Present embodiment uses plating solution of the present invention to carry out electroplating to brass sheet, and its operation process is as follows:
[0032] 1. Weigh 250g / L K 4 P 2 o 7 ·3H 2 Divide O into two beakers equally, add a small amount of distilled water, stir with a magnetic stirrer until completely dissolved; then add Cu to the two beakers respectively 2 P 2 o 7 ·3H 2 O and Sn 2 P 2 o 7 Solid, stir quickly until the solution in the two beakers becomes clear; finally, mix the solutions in the two beakers and pour them into a 1L beaker, and slowly neutralize the solution with phosphoric acid solution under stirring conditions until the pH reaches 8.5-9.0, leave it for a while, etc. After the plating solution turns dark blue and clear, dilute to volume with pure water;
[0033] 2. Use a 1mL pipette to pipette 0.8mL of additives into the above solution, stir with a magnetic stirrer for a while, and set aside;
[0034] 3. Use a 250mL measuring cylind...
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Abstract
Description
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Application Information
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