CN104947173A - Device and method for improving pH value of continuous electronickelling solution - Google Patents
Device and method for improving pH value of continuous electronickelling solution Download PDFInfo
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- CN104947173A CN104947173A CN201510264754.2A CN201510264754A CN104947173A CN 104947173 A CN104947173 A CN 104947173A CN 201510264754 A CN201510264754 A CN 201510264754A CN 104947173 A CN104947173 A CN 104947173A
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Abstract
The invention provides a device and method for improving pH value of a continuous electronickelling solution. The method for improving the pH value of the continuous electronickelling solution is characterized by comprising the following steps: firstly respectively preparing a NiSO4 plating solution with a certain pH value and a NaOH solution with a certain concentration in an anode liquor circulating slot and a cathode liquor circulating slot, respectively conveying solutions in the two slots into an anode chamber and a cathode chamber, putting sulphur-containing nickel balls into the anode chamber, electrifying two poles of a nickel dissolving slot, stabilizing current, observing voltage change, and detecting pH value of a NiSO4 solution in an anode region at set an interval. The device adopted for adjusting pH value of the electronickelling solution comprises a cathode liquor circulating slot, a thermometer, a stop valve, a sodium hydroxide solution tank, a pump, a purified water tank and a nickel dissolving slot, wherein the nickel dissolving slot comprises an anode liquor circulating slot, a clamping plate, an anion exchange membrane, a cathode chamber, a nickel screen cathode, a nickel plate, an anode chamber and an anode separating plate. The device and method for improving the pH value of the continuous electronickelling solution have the advantages that technique is simple, operation is easy, the pH value of the NiSO4 solution can be improved in short time, the problem of continuous supply of a plating solution is solved, the plating solution is recycled, and energy conservation and environmental protection are realized.
Description
Technical field:
The present invention relates to continuous electroplating technical field, particularly relate to a kind of apparatus and method improving continuous electroplating nickel plating bath pH value.
Background technology:
In the prior art, the anode majority of continuous electroplating nickel groove is insoluble anode, and during electronickelling, the nickel ion that plating consumes needs to obtain from nickel plating solution, and anode is oxygen evolution reaction, and negative electrode is the nickel deposition reaction of plating piece.Along with the carrying out of plating, the nickel ion of nickel plating solution constantly reduces, and hydrogen ion constantly increases, and the pH value of solution constantly declines.When the pH value of solution is less than 3, the coating surface quality degradation that nickel deposition produces, even may form coating.Thus, how keeping the pH value of nickel plating solution in a suitable scope, is one of key issue of continuous electroplating nickel.In order to solve this technical barrier, there are two kinds of conventional way: Yi Zhongshi at present, when pH value of solution drops to barrier line, at once add nickelous carbonate, change solution ph, the shortcoming of this method is that nickelous carbonate is slightly soluble in water, control the improper solution that very easily causes and produce nickelous carbonate precipitation, recycle pump in blocking solution recycle system, and then the recycle system is paralysed, have a strong impact on the continuous supply of electroplating process electroplate liquid; Another kind is, the sulfate ion in plating solution and the hydroxide ion in anionite-exchange resin is exchanged, and reaches the object changing solution ph, and the shortcoming of this method is loss plating solution, and required anionite-exchange resin amount regenerates greatly, not easily.At present, a kind of special purpose device for improving continuous electroplating nickel plating bath pH value is not also had.
Summary of the invention:
The object of the invention is the deficiency overcoming prior art existence, the apparatus and method of the raising continuous electroplating nickel plating bath pH value that a kind of technique is simple, easy to operate, energy-saving and environmental protection also can effectively keep the pH value of nickel plating solution in claimed range are provided.
Technical solution of the present invention is to provide a kind of method improving continuous electroplating nickel plating bath pH value, and feature is: the NiSO first configuring certain pH value in anolyte circulation groove and catholyte circulation groove respectively
4solution plating solution and certain density NaOH solution, and by the solution in two kinds of grooves respectively by Cemented filling to anolyte compartment and cathode compartment, and appropriate sulfur-bearing nickel ball is put in anolyte compartment, again the two poles of the earth of molten nickel groove are energized, fixed current, observe voltage change, detect NiSO in anolyte circulation groove at set intervals
4the pH value of solution and the molten nickel efficiency of anolyte compartment; The method feature is also: 1.. the NiSO of configuration anolyte circulation groove (18)
4solution ph is 1 ~ 3, temperature is 50 ~ 60 DEG C; 2.. the NaOH solution concentration of configuration catholyte circulation groove is 0.5wt.% ~ 5wt.%; 3.. the tap density putting into the sulfur-bearing nickel ball of anolyte compartment is 5.4g/cm
3; 4.. when the two poles of the earth of molten nickel groove are energized, fixed current is 15 ~ 30A, and its optimum value is 20A; 5.. detected NiSO in anolyte circulation groove every 0.2 ~ 1 hour
4the pH value of solution and the molten nickel efficiency of anolyte compartment; Being fixed on molten nickel groove middle part for isolating the anion-exchange membrane in anolyte compartment and cathode compartment formation anodic dissolution region and cathode solution region, only allowing the hydroxide ion of cathode zone to pass through, then entering anode region.The device that the method improving continuous electroplating nickel plating bath pH value uses, comprises interconnective catholyte circulation groove, thermometer a, thermometer b, stopping valve a, stopping valve b, sodium hydroxide solution tank, pump a, pump b, pure water tank, anolyte circulation groove; It is characterized in that: also comprise the molten nickel groove be made up of the clamping plate a be mutually permanently connected, clamping plate b, anion-exchange membrane, cathode compartment, nickel screen cathode, nickel plate, anolyte compartment, anode clapboard; Sodium hydroxide solution tank is connected with catholyte circulation groove pipeline, and pure water tank is connected with anolyte circulation groove pipeline; The top of catholyte circulation groove and anolyte circulation groove is connected to the clamping plate upper end of molten nickel groove respectively by pipeline, the side-lower of catholyte circulation groove and anolyte circulation groove is connected to the lower end of the clamping plate of molten nickel groove respectively by pump line road; Nickel screen cathode, nickel plate and anode clapboard are welded on molten nickel groove; Anion-exchange membrane is threaded with anode clapboard; The feature of this device is also: the anion-exchange membrane for isolating anolyte compartment and cathode compartment is fixed on the middle part of molten nickel groove, forms anodic dissolution region and the cathode solution region of molten nickel groove.
The invention has the beneficial effects as follows: simple structure, simple to operate, be easy to safeguard, low, the energy-conserving and environment-protective of cost; NiSO can be improved at short notice
4the pH value of solution is in the scope required.
Accompanying drawing illustrates:
Fig. 1 is the process flow sheet of the embodiment of the present invention.
In accompanying drawing: 1. catholyte circulation groove; 2. thermometer a; 3. stopping valve a; 4. sodium hydroxide solution tank; 5. clamping plate a; 6. anion-exchange membrane; 7. cathode compartment; 8. nickel screen cathode; 9. pump a; 10. pump b; 11. nickel plates; 12. anolyte compartments; 13. anode clapboards; 14. clamping plate b; 15. pure water tanks; 16. stopping valve b; 17. thermometer b; 18. anolyte circulation grooves.
Embodiment:
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail: shown in Fig. 1 is a kind of schema improving the apparatus and method of continuous electroplating nickel plating bath pH value of the embodiment of the present invention, and this device comprises interconnective catholyte circulation groove 1, thermometer a2, thermometer b17, stopping valve a3, stopping valve b16, sodium hydroxide solution tank 4, pump a9, pump b10, pure water tank 15, anolyte circulation groove 18; Also comprise the molten nickel groove be made up of the clamping plate a5 be mutually permanently connected, clamping plate b14, anion-exchange membrane 6, cathode compartment 7, nickel screen cathode 8, nickel plate 11, anolyte compartment 12, anode clapboard 13; Sodium hydroxide solution tank 4 is connected with catholyte circulation groove 1 pipeline, and pure water tank 15 is connected with anolyte circulation groove 18 pipeline; The top of catholyte circulation groove 1 and anolyte circulation groove 18 is connected to clamping plate 5,14 upper end of molten nickel groove respectively by pipeline, the side-lower of catholyte circulation groove 1 and anolyte circulation groove 18 is connected to the lower end of the clamping plate 5,14 of molten nickel groove respectively by pump 9,10 pipeline; Nickel screen cathode 8, nickel plate 11 and anode clapboard 13 are welded on molten nickel groove; Anion-exchange membrane 6 is threaded with anode clapboard 13; The feature of this device is also: the anion-exchange membrane 6 for isolating anolyte compartment 12 and cathode compartment 7 is fixed on the middle part of molten nickel groove, forms anodic dissolution region and the cathode solution region of molten nickel groove.Under use said apparatus condition, a kind of embodiment improving the method for continuous electroplating nickel plating bath pH value also comprises: embodiment 1: be fixedly connected with anode clapboard 13 supports by a new anion-exchange membrane; First putting into appropriate tap density in anolyte compartment is 5.4g/cm
3sulfur-bearing nickel ball, be 1 by the pH value from electronickelling production line, temperature be the NiSO of 50 ~ 60 DEG C
4plating solution guides to anolyte circulation groove 18, gets to the anolyte compartment 12 of molten nickel groove with pump, the sulfur-bearing nickel ball of submergence anolyte compartment, and anolyte compartment 12 solution overflows back anolyte circulation groove 18 from top; Be that the NaOH solution of 0.5wt.% guides to catholyte circulation groove 1 by the concentration in sodium hydroxide solution tank 4, the cathode compartment 7 of molten nickel groove is got to pump, cathode compartment 7 solution overflows back catholyte circulation groove 1 from top, and supplementing from the concentration in sodium hydroxide solution tank 4 to catholyte circulation groove 1 every half hour is the NaOH solution of 0.5wt.%.To the two poles of the earth of molten nickel groove energising, fixed current 20A, observes voltage change, every 0.2 hour, detects NiSO in anolyte circulation groove 18
4the pH value of solution and the molten nickel efficiency of anolyte compartment 12.Embodiment 2: a new anion-exchange membrane is fixedly connected with anode clapboard 13 supports; First putting into appropriate tap density in anolyte compartment 12 is 5.4g/cm
3sulfur-bearing nickel ball, be 1 by the pH value from electronickelling production line, temperature be the NiSO of 50 ~ 60 DEG C
4plating solution guides to anolyte circulation groove 18, gets to the anolyte compartment 12 of molten nickel groove with pump, the sulfur-bearing nickel ball of submergence anolyte compartment, and anolyte compartment 12 solution overflows back anolyte circulation groove 18 from top; Be that the NaOH solution of 1.5wt.% guides to catholyte circulation groove 1 by the concentration in sodium hydroxide solution tank 4, the cathode compartment 7 of molten nickel groove is got to pump, cathode compartment 7 solution overflows back catholyte circulation groove from top, and supplementing from the concentration in sodium hydroxide solution tank 4 every half hour to catholyte circulation groove is the NaOH solution of 1.5wt.%.To the two poles of the earth of molten nickel groove energising, fixed current 20A, observes voltage change, every 0.2 hour, detects NiSO in anolyte circulation groove 18
4the pH value of solution and the molten nickel efficiency of anolyte compartment 12.Embodiment 3: a new anion-exchange membrane is fixedly connected with anode clapboard 13 supports; First putting into appropriate tap density in anolyte compartment 12 is 5.4g/cm
3sulfur-bearing nickel ball, be 2 by the pH value from electronickelling production line, temperature be the NiSO of 50 ~ 60 DEG C
4plating solution guides to anolyte circulation groove 18, gets to the anolyte compartment 12 of molten nickel groove with pump, the sulfur-bearing nickel ball of submergence anolyte compartment, and anolyte compartment 12 solution overflows back anolyte circulation groove 18 from top; Be that the NaOH solution of 2.5wt.% guides to catholyte circulation groove 1 by the concentration in sodium hydroxide solution tank 4, the cathode compartment 7 of molten nickel groove is got to pump, cathode compartment 7 solution overflows back catholyte circulation groove 1 from top, and supplementing from the concentration in sodium hydroxide solution tank 4 to catholyte circulation groove 1 every half hour is the NaOH solution of 2.5wt.%.To the two poles of the earth of molten nickel groove energising, fixed current 20A, observes voltage change, every 0.5 hour, detects NiSO in anolyte circulation groove
4the pH value of solution and the molten nickel efficiency of anolyte compartment 12.Embodiment 4: a new anion-exchange membrane is fixedly connected with anode clapboard 13 supports; First putting into appropriate tap density in anolyte compartment 12 is 5.4g/cm
3sulfur-bearing nickel ball, be 2 by the pH value from electronickelling production line, temperature be the NiSO of 50 ~ 60 DEG C
4plating solution guides to anolyte circulation groove 18, gets to the anolyte compartment 12 of molten nickel groove with pump, the sulfur-bearing nickel ball of submergence anolyte compartment, and anolyte compartment's solution overflows back anolyte circulation groove 18 from top; Be that the NaOH solution of 3.5wt.% guides to catholyte circulation groove 1 by the concentration in sodium hydroxide solution tank 4, the cathode compartment 7 of molten nickel groove is got to pump, cathode chamber solution overflows back catholyte circulation groove 1 from top, and supplementing from the concentration in sodium hydroxide solution tank 4 to catholyte circulation groove 1 every half hour is the NaOH solution of 3.5wt.%.To the two poles of the earth of molten nickel groove energising, fixed current 20A, observes voltage change, every 0.5 hour, detects NiSO in anolyte circulation groove 18
4the pH value of solution and the molten nickel efficiency of anolyte compartment 12.Embodiment 5: a new anion-exchange membrane is fixedly connected with anode clapboard 13 supports; First putting into appropriate tap density in anolyte compartment is 5.4g/cm
3sulfur-bearing nickel ball, be 3 by the pH value from electronickelling production line, temperature be the NiSO of 50 ~ 60 DEG C
4plating solution guides to anolyte circulation groove 18, gets to the anolyte compartment 12 of molten nickel groove with pump, the sulfur-bearing nickel ball of submergence anolyte compartment, and anolyte compartment's solution overflows back anolyte circulation groove 18 from top; Be that the NaOH solution of 5wt.% guides to catholyte circulation groove 1 by the concentration in sodium hydroxide solution tank 4, the cathode compartment 7 of molten nickel groove is got to pump, cathode chamber solution overflows back catholyte circulation groove 1 from top, and supplementing from the concentration in sodium hydroxide solution tank 4 to catholyte circulation groove 1 every half hour is the NaOH solution of 5wt.%.To the two poles of the earth of molten nickel groove energising, fixed current 20A, observes voltage change, every 1 hour, detects NiSO in anolyte circulation groove 18
4the pH value of solution and the molten nickel efficiency of anolyte compartment 12.
Claims (5)
1. improve a method for continuous electroplating nickel plating bath pH value, it is characterized in that, in anolyte circulation groove (18) and catholyte circulation groove (1), first configure the NiSO of certain pH value respectively
4solution plating solution and certain density NaOH solution, and by the solution in two kinds of grooves respectively by Cemented filling to anolyte compartment (12) and cathode compartment (7), and put into appropriate sulfur-bearing nickel ball in anolyte compartment (12), again the two poles of the earth of molten nickel groove are energized, fixed current, observe voltage change, at set intervals, detect NiSO in anolyte circulation groove
4the pH value of solution and the molten nickel efficiency of anolyte compartment.
2. a kind of method improving continuous electroplating nickel plating bath pH value as claimed in claim 1, is characterized in that:
(1) NiSO of anolyte circulation groove (18) is configured
4solution ph is 1 ~ 3, temperature is 50 ~ 60 DEG C;
(2) the NaOH solution concentration configuring catholyte circulation groove (1) is 0.5wt.% ~ 5wt.%;
(3) tap density putting into the sulfur-bearing nickel ball of anolyte compartment (12) is 5.4g/cm
3;
(4), when the two poles of the earth of molten nickel groove are energized, fixed current is 15 ~ 30A, and its optimum value is 20A;
(5) every 0.2 ~ 1 hour, NiSO in anolyte circulation groove is detected
4the pH value of solution and the molten nickel efficiency of anolyte compartment.
3. a kind of method improving continuous electroplating nickel plating bath pH value as claimed in claim 1, it is characterized in that: the anion-exchange membrane (6) being fixed on molten isolation anolyte compartment, nickel groove middle part (12) and cathode compartment (7) formation anodic dissolution region and cathode solution region, only allow the hydroxide ion of cathode zone to pass through, then enter anode region.
4. the device that the method improving continuous electroplating nickel plating bath pH value uses, comprises interconnective catholyte circulation groove (1), thermometer a (2), thermometer b (17), stopping valve a (3), stopping valve b (16), sodium hydroxide solution tank (4), pump a (9), pump b (10), pure water tank (15), anolyte circulation groove (18); It is characterized in that: also comprise the molten nickel groove be made up of the clamping plate a (5) be mutually permanently connected, clamping plate b (14), anion-exchange membrane (6), cathode compartment (7), nickel screen cathode (8), nickel plate (11), anolyte compartment (12), anode clapboard (13); Sodium hydroxide solution tank (4) is connected with catholyte circulation groove (1) pipeline, and pure water tank (15) is connected with anolyte circulation groove (18) pipeline; The top of catholyte circulation groove (1) and anolyte circulation groove (18) is connected to clamping plate (5, the 14) upper end of molten nickel groove respectively by pipeline, the side-lower of catholyte circulation groove (1) and anolyte circulation groove (18) is connected to the lower end of the clamping plate (5,14) of molten nickel groove respectively by pump (9,10) pipeline; Nickel screen cathode (8), nickel plate (11) and anode clapboard (13) are welded on molten nickel groove; Anion-exchange membrane (6) is threaded with anode clapboard (13).
5. a kind of device improving the method use of continuous electroplating nickel plating bath pH value as claimed in claim 4, it is characterized in that: the anion-exchange membrane (6) for isolating anolyte compartment (12) and cathode compartment (7) is fixed on the middle part of molten nickel groove, forming anodic dissolution region and the cathode solution region of molten nickel groove.
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Citations (9)
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JPS60121299A (en) * | 1983-12-01 | 1985-06-28 | Tokuyama Soda Co Ltd | Nickel plating method |
US6056862A (en) * | 1997-10-30 | 2000-05-02 | Daiki Engineering Co., Ltd. | Process and apparatus for supplying metal ions to alloy electroplating bath |
US6251255B1 (en) * | 1998-12-22 | 2001-06-26 | Precision Process Equipment, Inc. | Apparatus and method for electroplating tin with insoluble anodes |
WO2001092604A2 (en) * | 2000-05-31 | 2001-12-06 | De Nora Elettrodi S.P.A. | Electrolysis cell for restoring the concentration of metal ions in processes of electroplating |
CN101270497A (en) * | 2008-05-16 | 2008-09-24 | 南京大学 | Regulating method for acidity basicity of feed liquid |
CN101397691A (en) * | 2007-09-24 | 2009-04-01 | 长江润发集团有限公司 | Apparatus and technology for controlling and improving plating solution PH value on fingerprint resistant production chain |
CN101962796A (en) * | 2010-08-17 | 2011-02-02 | 苏州铨笠电镀挂具有限公司 | Method for sustainably complementing metallic cations in plating solution |
CN103108995A (en) * | 2010-08-18 | 2013-05-15 | 麦克德米德股份有限公司 | Nickel pH adjustment method and apparatus |
CN104342747A (en) * | 2013-08-06 | 2015-02-11 | 朗姆研究公司 | Apparatuses and methods for maintaining ph in nickel electroplating baths |
-
2015
- 2015-05-22 CN CN201510264754.2A patent/CN104947173A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS60121299A (en) * | 1983-12-01 | 1985-06-28 | Tokuyama Soda Co Ltd | Nickel plating method |
US6056862A (en) * | 1997-10-30 | 2000-05-02 | Daiki Engineering Co., Ltd. | Process and apparatus for supplying metal ions to alloy electroplating bath |
US6251255B1 (en) * | 1998-12-22 | 2001-06-26 | Precision Process Equipment, Inc. | Apparatus and method for electroplating tin with insoluble anodes |
WO2001092604A2 (en) * | 2000-05-31 | 2001-12-06 | De Nora Elettrodi S.P.A. | Electrolysis cell for restoring the concentration of metal ions in processes of electroplating |
CN101397691A (en) * | 2007-09-24 | 2009-04-01 | 长江润发集团有限公司 | Apparatus and technology for controlling and improving plating solution PH value on fingerprint resistant production chain |
CN101270497A (en) * | 2008-05-16 | 2008-09-24 | 南京大学 | Regulating method for acidity basicity of feed liquid |
CN101962796A (en) * | 2010-08-17 | 2011-02-02 | 苏州铨笠电镀挂具有限公司 | Method for sustainably complementing metallic cations in plating solution |
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CN104342747A (en) * | 2013-08-06 | 2015-02-11 | 朗姆研究公司 | Apparatuses and methods for maintaining ph in nickel electroplating baths |
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Application publication date: 20150930 |