Pyrophosphate system gold imitation electroplating liquid and electroplating process
A pyrophosphate and electroplating technology, applied in the field of alkaline imitation gold electroplating, can solve the problems of unsatisfactory uniform plating ability of pyrophosphate system solution, rough crystallization of alloy coating, narrow current density range, etc. The effect of good coating appearance and low cost
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Embodiment 1
[0025] Present embodiment uses plating solution of the present invention to carry out electroplating to brass sheet, and its operation process is as follows:
[0026] 1. Weigh 240g / 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 solutions in the two beakers become clear; finally, mix the solutions in the two beakers and pour them into a 1L beaker; weigh 1g of nitrilotriacetic acid solid, add sodium hydroxide solution and stir until it is completely dissolved, and pour the above mixed solution After magnetic stirring for a while, slowly neutralize the solution with phosphoric acid solution until the pH reaches 8.5-9.0, leave it for a while until the plating solution turns dark blue and clear, then use pure water to make up the volume;
[0027] 2. Use a 1mL pip...
Embodiment 2
[0030] 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 step b to a 500mL square tank, use phosphor copper as the anode, and the polished brass sheet as the cathode, and the current 0.5A, ventilated and stirred, and electroplated for 10 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 84.36%, Sn 15.64%. image 3 It is a micrograph of 2...
Embodiment 3
[0032] Present embodiment uses plating solution of the present invention to carry out electroplating to brass sheet, and its operation process is as follows:
[0033] 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 solutions in the two beakers become clear; finally, mix the solutions in the two beakers and pour them into a 1L beaker; weigh 1.2g of nitrilotriacetic acid solid, add sodium hydroxide solution and stir until it is completely dissolved, and pour into the above mixture In the solution, after magnetic stirring for a while, slowly neutralize the solution with phosphoric acid solution until the pH reaches 8.5-9.0, leave it for a while until the plating solution turns dark blue and clear, then use pure water to make up the volume;
[0034]...
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Abstract
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