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Deposit fluid recycling utilization method

A deposition solution and solution technology, which is applied in the field of recycling deposition solution used in electroless nickel plating, can solve the problems of unusable, cloudy solution, environmental pollution, etc., and achieve the effect of reducing material cost, good appearance and stable technology

Active Publication Date: 2009-11-18
BAOTA IND CO LTD
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Problems solved by technology

[0009] After the existing sedimentation solution is used several times, the solution becomes turbid and cannot be used any longer. It can only be discarded, resulting in waste or environmental pollution. Even if the corresponding components are added after filtration, it can only be used several times, and it must be discharged in the end.

Method used

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Embodiment Construction

[0026] The concrete operation process of the present invention in being applied to the nickel plating of bearing and other parts:

[0027] (1) After the used deposition liquid is cooled to normal temperature, it is filtered into the accessory tank, and chemical analysis is carried out to analyze the remaining amount of the two main salts of nickel sulfate and sodium hypophosphite, and then according to the content of nickel sulfate and sodium hypophosphite Calculate the additional amount of other components from the remaining amount, and the calculation method is as follows (calculated on the basis of 1 liter of sedimentation liquid, the unit is grams)

[0028] Supplementary amount of nickel sulfate: 25- remaining amount of nickel sulfate

[0029] Supplementary amount of sodium hypophosphite: 20-residual amount of sodium hypophosphite

[0030] Supplementary amount of hydroxypropionic acid: the same as that of nickel sulfate

[0031] Addition amount of sodium bicarbonate: 3 / 5...

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Abstract

The invention relates to a deposit fluid recycling utilization method. The method comprises the following technical processes of: cooling used deposit fluid to normal temperature; filtering the deposit fluid; analyzing the residual amounts of nickel vitriol and sodium phosphate thereof; calculating addition amount of other components according to the residual amounts of the nickel vitriol and the sodium phosphate; adding nickel vitriol, subpressure sodium phosphate, hydracrylic acid, sodium bicarbonate and boric acid according to the addition amount; and then continuing to use the mixed fluid. The method has stable technology; components such as bearings and the like which are repaired by the deposit fluid have standard sizes, better appearance and strong antiseptic capability; turbidity hardly happens to the deposit fluid, and the deposit fluid is not discharged; and the material cost is greatly reduced.

Description

Technical field: [0001] The invention relates to an electroless nickel plating technology, in particular to a method for recycling deposition liquid used in electroless nickel plating. Background technique: [0002] Existing electroless nickel plating can be used to repair the out-of-tolerance dimensions of bearings or other parts. The nickel plating solution used is also called deposition solution. Its composition and proportion are as follows: [0003] 1. Nickel sulfate NiSO4.7H 2 O 0.089M concentration 280.7g / l [0004] 2. Hydroxypropionic acid 0.275M concentration 90.8g / l [0005] 3. Sodium bicarbonate 0.179M concentration 84.01g / l [0006] 4. Sodium hypophosphite N a h 2 PO 3 .H 2 O 0.189M concentration 105.99g / l [0007] 5. Boric acid H 3 BO 3 0.162M Concentration 61.83g / l [0008] 6. Sodium hydroxide 25% solution is used to adjust the pH value of the deposition solution. [0009] After the existing sedimentation solution is used several tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36
Inventor 胡秀丽纪毅郝彭何强闫海翔张培强
Owner BAOTA IND CO LTD
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