Treatment method of chemical nickel-plating solution
A technology of electroless nickel plating and treatment methods, applied in the direction of coating, etc., can solve the problems of no pollution, environmental protection, and the quality of electroless nickel plating cannot be guaranteed, so as to prevent environmental pollution, realize comprehensive utilization, and eliminate pollution. Effect
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Embodiment 1
[0037] The 500L acidic electroless nickel plating solution used for 6 cycles was pumped into a container larger than 500L, and the concentration of nickel ions was found to be 0.075M by chemical analysis. It was calculated that the total nickel contained in the solution = 58.69*0.075*500=2200.875 grams, planned production For nickel-coated iron powder containing about 75% iron, heat and stir the solution, add 7 kg of 500-mesh iron powder, adjust the pH value to about 7 with 20% potassium hydroxide solution and maintain it continuously. When a large number of bubbles are released in the solution, a total of Slowly add 10kg of sodium hypophosphite into the solution until the clear solution is colorless and transparent, keep stirring and keep warm at 85-90°C for more than two hours, filter the solution after cooling, rinse and dry the powder, and weigh 9.3kg of nickel Phosphorus alloy iron-coated powder can be sold to the powder metallurgy industry to partially replace nickel powd...
Embodiment 2
[0042] The 300L acidic electroless nickel plating solution used for 6 cycles was pumped into a container larger than 300L, and the concentration of nickel ions was found to be 0.06M by chemical analysis. It was calculated that the total nickel contained in the solution = 58.69*0.06*300=1056.42 grams, planned production Nickel-coated ceramic powder containing about 35% nickel-phosphorus alloy, add 2.1kg of 200-mesh aluminum oxide powder, and the powder is first processed by the following steps in the pretreatment process of non-metallic surface electroplating: 50%H2SO4+5%HF solution coarse Melting for 20 minutes - washing with water - soaking in 15g / LSnCL2+50ml / LHCL solution for 10 minutes - washing with water - 1g / LPdCL solution for 2 minutes - washing with water.
[0043] Heat and stir the solution, adjust the pH value to 6.5 with 20% sodium hydroxide solution and maintain it continuously, add the ceramic powder that has been pretreated above, when a large number of bubbles ar...
Embodiment 3
[0048] The potassium hydroxide solution in Example 1 is replaced by calcium hydroxide solution or calcium oxide powder, and the formed precipitate is separated and used as a raw material for phosphate fertilizer, while waste water can be introduced into a sewage plant for further treatment.
[0049] The liquid carried out from the electroless nickel-plated parts is recycled as evaporated water after secondary recovery at the side of the tank. After the rinse water is separated by the membrane, the clear water is reused as reclaimed water, and the concentrated water is mixed into the aging liquid for treatment.
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