Silver-plating solution
A solution and silver-plating technology, applied in the field of metal surface treatment, can solve the problems of poor coating adhesion and no coating in deep concave parts, and achieve the effect of solving poor adhesion.
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Embodiment 1
[0020] 1. Prepare 100L silver plating solution: 38g / L silver chloride AgCl, 95g / L analytically pure potassium cyanide KCN, 1.3g / L analytically pure sodium thiosulfate Na 2 S 2 o 3 .5H 2 O content is prepared.
[0021] Among them, silver chloride is prepared by adding sodium chloride to silver nitrate. Dissolve 5.7 kg of silver nitrate and 2 kg of sodium chloride in a separate container with an appropriate amount of water, and then dissolve the sodium chloride The solution is slowly poured into the silver nitrate solution while stirring continuously. At this time, a white curd-like silver chloride precipitate is precipitated. After standing still, the upper solution is poured out by decantation, and the chlorine remaining at the bottom is Wash silver with distilled water 2 to 3 times to remove Na + , NO 3 - and more Cl - Ion, standby, the whole operation process should be carried out in a dark room or place away from light.
Embodiment 2
[0046] 1. Prepare 100L silver plating solution: 30g / L silver chloride AgCl, 70g / L analytically pure potassium cyanide KCN, 0.5g / L analytically pure sodium thiosulfate Na 2 S 2 o 3 .5H 2 O content is prepared.
[0047] Among them, silver chloride is prepared by adding sodium chloride to silver nitrate. Dissolve 5.7 kg of silver nitrate and 2 kg of sodium chloride in a separate container with an appropriate amount of water, and then dissolve the sodium chloride The solution is slowly poured into the silver nitrate solution while stirring continuously. At this time, a white curd-like silver chloride precipitate is precipitated. After standing still, the upper solution is poured out by decantation, and the chlorine remaining at the bottom is Wash silver with distilled water 2 to 3 times to remove Na + , NO 3 - and more Cl - Ion, standby, the whole operation process should be carried out in a dark room or place away from light.
[0048] Then 7 kg of potassium cyanide and 50...
Embodiment 3
[0072] 1. Prepare 100L silver plating solution: 45g / L silver chloride AgCl, 120g / L analytically pure potassium cyanide KCN, 2g / L analytically pure sodium thiosulfate Na 2 S 2 o 3 .5H 2 O content is prepared.
[0073] Among them, silver chloride is prepared by adding sodium chloride to silver nitrate. Dissolve 5.7 kg of silver nitrate and 2 kg of sodium chloride in a separate container with an appropriate amount of water, and then dissolve the sodium chloride The solution is slowly poured into the silver nitrate solution while stirring continuously. At this time, a white curd-like silver chloride precipitate is precipitated. After standing still, the upper solution is poured out by decantation, and the chlorine remaining at the bottom is Wash silver with distilled water 2 to 3 times to remove Na + , NO 3 - and more Cl - Ion, standby, the whole operation process should be carried out in a dark room or place away from light.
[0074] Then 12 kg of potassium cyanide and 20...
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