CN101818368B - Electrodeposit nickel plating method for deformation zinc alloy - Google Patents
Electrodeposit nickel plating method for deformation zinc alloy Download PDFInfo
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- CN101818368B CN101818368B CN2010101799437A CN201010179943A CN101818368B CN 101818368 B CN101818368 B CN 101818368B CN 2010101799437 A CN2010101799437 A CN 2010101799437A CN 201010179943 A CN201010179943 A CN 201010179943A CN 101818368 B CN101818368 B CN 101818368B
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Abstract
The invention discloses an electrodeposit nickel plating method. The solvent of the electrodeposit nickel plating solution is deionized water, and a solute comprises nickel sulfate hexahydrate (110-130g/L), sodium chloride (10-15g/L), boric acid (30-35g/L) and sodium citrate (80-170g/L). In the electrodeposit nickel plating method, before electrodepositing, the pH value of the electrodeposit nickel plating solution is regulated to 4.8-6.9, the temperature of the electrodeposit nickel plating solution is kept at 20-30 DEG C, and the cathode current density is 0.8-1.5 amperes/dm<2>. The electrodeposit nickel plating solution does not contain prussiates and has the advantages of no pollution and good stability. The cladding surface made by the electrodeposit nickel plating method has no fringes, no cracks when being observed by a metalloscope, and no bubbling or stripping in case of thermal shock at 150 DEG C; and the discolored area on the paste surface does not exceed 10%.
Description
Technical field
The present invention relates to the field of surface treatment of deformation zinc alloy, especially relate to a kind of electrodeposit nickel plating method of deformation zinc alloy.
Background technology
Zinc alloy is to be that base adds other elementary composition alloys with zinc.The main adding elements of zinc alloy has aluminium, copper and magnesium etc.By ME, zinc alloy can be divided into cast zinc alloy and deformation zinc alloy.Compare with traditional cast zinc alloy, deformation zinc alloy has higher strength and cold plasticity, is mainly used in the zinc material of producing different shape, is the equivalent material of brass, is widely used in industries such as electronics, communication, five metals, system pen, bathrooms.
Usually, zinc alloy is carried out corrosion resistance nature and the decorate properties that surface treatment can be strengthened zinc alloy.As far as deformation zinc alloy, because aluminium content is higher and the course of processing of use extrusion molding, have higher chemically reactive, therefore need to use surface-treated method its corrosion resistance nature of reinforcement and decorate properties equally.
In the traditional method; The general prussiate that uses is as the composition of copper electroplating technology and in the zinc alloy surface electro-coppering; But because the prussiate that contains in the plating solution has toxicity, with contaminate environment and health risk, so replaced by other nontoxic plating solutions.At present, be applicable to that the galvanized neutral nickel plating technology of Mg alloy surface all is developed at zinc alloy surface, neutral nickel plating technology has the free of contamination advantage of environmental friendliness, can substitute cyanide copper plating technology to a certain extent and is used for zinc alloy surface and electroplates.But; The main pooled applications of neutral nickel plating technology of zinc alloy surface is in the cast zinc alloy of die cast at present, and in addition, the solution composition of neutral nickel plating and processing condition also are not suitable for deformation zinc alloy; Exist coating crackle to occur; Will coating performance of influence own and follow-up plating, and problem such as bath stability is poor, and is difficult in maintenance.
Therefore,, be badly in need of seeking a kind of deformation zinc alloy that is suitable for to present deformation zinc alloy surface-treated present situation, and environmental protection stable surface treatment process.
Summary of the invention
Technical problem to be solved by this invention is the electrodeposit nickel plating method that a kind of deformation zinc alloy is provided to the above-mentioned state of the art.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
A kind of electrodeposit nickel plating solution of deformation zinc alloy, solvent are deionized water, and each component and the concentration thereof of solute are following:
Six hydration nickel sulfate 110～130g/L;
Sodium-chlor 10～15g/L;
Boric acid 30～35g/L;
Trisodium Citrate 80～170g/L.
A kind of electrodeposit nickel plating method of deformation zinc alloy comprises the steps:
Step 1: preparation electrodeposit nickel plating solution, the component and the concentration thereof of this electrodeposit nickel plating solution are following:
Six hydration nickel sulfate 110～130g/L;
Sodium-chlor 10～15g/L;
Boric acid 30～35g/L;
Trisodium Citrate 80～170g/L;
Step 2: the pH value of the electrodeposit nickel plating solution that use sodium hydroxide solution regulating step 1 obtains is 4.8～6.9, filters then; Keeping the temperature of electrodeposit nickel plating solution is 20～30 ℃;
Step 3: will immerse in the electrodeposit nickel plating solution through the deformation zinc alloy of oil removing, setting cathode current density is 0.8～1.5 ampere/decimeter
2, carry out electrodeposit nickel plating.
For optimizing technique scheme, the measure of taking also comprises:
The process of configuration electrodeposit nickel plating solution is following in the above-mentioned steps 1:
(1) Trisodium Citrate adds deionized water dissolving;
(2) six hydration nickel sulfate, sodium-chlor add deionized water dissolving;
(3) boric acid heating deionized water dissolving;
(4) pour (2) solution in (1) solution into, stir;
(5) (3) solution is poured in (4) solution, stirred.
The concentration of the sodium hydroxide solution in the above-mentioned steps 2 is 10mol/L.
Compared with prior art, the electrodeposit nickel plating solution of a kind of deformation zinc alloy of the present invention does not contain prussiate, environmentally safe, and good stability, and life cycle is long; Use nickel plating method gained coating surface of the present invention not have striped; Under metaloscope, observe flawless; Do not have the foaming peeling phenomenon 150 ℃ of following thermal shocks, be coated in the surface discolouration area that coating surface is used for the paste (hereinafter to be referred as being coated with cream) in gaging hole crack and be no more than 10%.
Description of drawings
Fig. 1 is pH value and a Trisodium Citrate content in the electrodeposit nickel plating solution of the corresponding embodiment of the invention, coating characteristics synoptic diagram after the stability of electrodeposit nickel plating solution and the nickel plating.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
The solvent of the electrodeposit nickel plating solution of a kind of deformation zinc alloy of the present invention is a deionized water, and each component and the concentration thereof of solute are following:
Six hydration nickel sulfate 110～130g/L;
Sodium-chlor 10～15g/L;
Boric acid 30～35g/L;
Trisodium Citrate 80～170g/L.
The process for preparation of the electrodeposit nickel plating solution of above-mentioned a kind of deformation zinc alloy is following:
(1) adds deionized water dissolving to the Trisodium Citrate in the above-mentioned prescription;
(2) add deionized water dissolving to the six hydration nickel sulfate in the above-mentioned prescription, sodium-chlor;
(3) the heating of the boric acid in above-mentioned prescription deionized water dissolving;
(4) pour (2) solution in (1) solution into, stir;
(5) pour (3) solution in (4) solution into, stir;
Fig. 1 is pH value and a Trisodium Citrate content in the corresponding electrodeposit nickel plating solution of the present invention, coating characteristics synoptic diagram after the stability of electrodeposit nickel plating solution and the nickel plating.
As can beappreciated from fig. 1, when the point of crossing of pH value and Trisodium Citrate content in the electrodeposit nickel plating solution of the present invention laid respectively at A district, B district, C district and D district, the coating that obtains behind electrodeposit nickel plating solution and the electrodeposit nickel plating had following characteristics:
The A district: the electrodeposit nickel plating stability of solution is poor, the turbidity and precipitation phenomenon occurs.
The B district: striped appears in the electrodeposition cladding surface, and outward appearance is defective.
The C district: the no striped in electrodeposition cladding surface, under metaloscope, observe flawless, there is not the foaming peeling phenomenon 150 ℃ of following thermal shocks, be coated with cream surface discolouration area and be no more than 10%.
The D district: coating surface does not have striped, and under metaloscope, observing has crackle, the foaming peeling phenomenon occurs 150 ℃ of following thermal shocks, is coated with cream surface discolouration area and surpasses 10%.
Can draw thus, when electrodeposit nickel plating solution of the present invention is positioned at the C district (the pH value is 4.8～6.9), deformation zinc alloy carried out electrodeposit nickel plating after, the deformation zinc alloy surface obtains well behaved coating.
Embodiment 1:
A kind of each component and content thereof of electrodeposit nickel plating solution of deformation zinc alloy are following:
Six hydration nickel sulfate 110g/L;
Sodium-chlor 12g/L;
Boric acid 30g/L;
Trisodium Citrate 80g/L.
Above each component is prepared electrodeposit nickel plating solution according to aforesaid process for preparation; Using the pH value of this electrodeposit nickel plating solution of sodium hydroxide solution adjusting of 10mol/L is 6.9; Keeping the temperature of electrodeposit nickel plating solution is 30 ℃; To immerse in the electrodeposit nickel plating solution through the deformation zinc alloy of oil removing, setting cathode current density is 0.8 ampere/decimeter
2, carry out electrodeposit nickel plating.The gained coating surface does not have striped, under metaloscope, observes flawless, does not have the foaming peeling phenomenon 150 ℃ of following thermal shocks, is coated with cream surface discolouration area and is no more than 10%.
Embodiment 2:
A kind of each component and content thereof of electrodeposit nickel plating solution of deformation zinc alloy are following:
Six hydration nickel sulfate 120g/L;
Sodium-chlor 10g/L;
Boric acid 30g/L;
Trisodium Citrate 120g/L.
Above each component is prepared electrodeposit nickel plating solution according to aforesaid process for preparation; Using the pH value of this electrodeposit nickel plating solution of sodium hydroxide solution adjusting of 10mol/L is 6.0; Keeping the temperature of electrodeposit nickel plating solution is 25 ℃; To immerse in the electrodeposit nickel plating solution through the deformation zinc alloy of oil removing, setting cathode current density is 1.0 amperes/decimeter
2, carry out electrodeposit nickel plating.The gained coating surface does not have striped, under metaloscope, observes flawless, does not have the foaming peeling phenomenon 150 ℃ of following thermal shocks, is coated with cream surface discolouration area and is no more than 10%.
Embodiment 3:
A kind of each component and content thereof of electrodeposit nickel plating solution of deformation zinc alloy are following:
Six hydration nickel sulfate 130g/L;
Sodium-chlor 15g/L;
Boric acid 35g/L;
Trisodium Citrate 170g/L.
Above each component is prepared electrodeposit nickel plating solution according to aforesaid process for preparation; Using the pH value of this electrodeposit nickel plating solution of sodium hydroxide solution adjusting of 10mol/L is 4.8; Keeping the temperature of electrodeposit nickel plating solution is 20 ℃; To immerse in the electrodeposit nickel plating solution through the deformation zinc alloy of oil removing, setting cathode current density is 1.5 amperes/decimeter
2, carry out electrodeposit nickel plating.The gained coating surface does not have striped, under metaloscope, observes flawless, does not have the foaming peeling phenomenon 150 ℃ of following thermal shocks, is coated with cream surface discolouration area and is no more than 10%.
Embodiment 4:
A kind of each component and content thereof of electrodeposit nickel plating solution of deformation zinc alloy are following:
Six hydration nickel sulfate 115g/L;
Sodium-chlor 12g/L;
Boric acid 35g/L;
Trisodium Citrate 100g/L.
Above each component is prepared electrodeposit nickel plating solution according to aforesaid process for preparation; Using the pH value of this electrodeposit nickel plating solution of sodium hydroxide solution adjusting of 10mol/L is 6.5; Keeping the temperature of electrodeposit nickel plating solution is 25 ℃; To immerse in the electrodeposit nickel plating solution through the deformation zinc alloy of oil removing, setting cathode current density is 1.0 amperes/decimeter
2, carry out electrodeposit nickel plating.The gained coating surface does not have striped, under metaloscope, observes flawless, does not have the foaming peeling phenomenon 150 ℃ of following thermal shocks, is coated with cream surface discolouration area and is no more than 10%.
Embodiment 5:
A kind of each component and content thereof of electrodeposit nickel plating solution of deformation zinc alloy are following:
Six hydration nickel sulfate 125g/L;
Sodium-chlor 15g/L;
Boric acid 33g/L;
Trisodium Citrate 150g/L.
Above each component is prepared electrodeposit nickel plating solution according to aforesaid process for preparation; Using the pH value of this electrodeposit nickel plating solution of sodium hydroxide solution adjusting of 10mol/L is 5.3; Keeping the temperature of electrodeposit nickel plating solution is 20 ℃; To immerse in the electrodeposit nickel plating solution through the deformation zinc alloy of oil removing, setting cathode current density is 1.5 amperes/decimeter
2, carry out electrodeposit nickel plating.The gained coating surface does not have striped, under metaloscope, observes flawless, does not have the foaming peeling phenomenon 150 ℃ of following thermal shocks, is coated with cream surface discolouration area and is no more than 10%.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.
Claims (3)
1. the electrodeposit nickel plating method of a deformation zinc alloy is characterized in that: comprise the steps:
Step 1: preparation electrodeposit nickel plating solution, the component and the concentration thereof of described electrodeposit nickel plating solution are following:
Six hydration nickel sulfate 110～130g/L;
Sodium-chlor 10～15g/L;
Boric acid 30～35g/L;
Trisodium Citrate 80～170g/L;
Step 2: the pH value of the electrodeposit nickel plating solution that use sodium hydroxide solution regulating step 1 obtains is 4.8～6.9, filters then; Keeping the temperature of electrodeposit nickel plating solution is 20～30 ℃;
Step 3: will immerse in the electrodeposit nickel plating solution through the deformation zinc alloy of oil removing, setting cathode current density is 0.8～1.5 ampere/decimeter
2, carry out electrodeposit nickel plating.
2. the electrodeposit nickel plating method of a kind of deformation zinc alloy according to claim 1 is characterized in that: the process of configuration electrodeposit nickel plating solution is following in the described step 1:
(1) Trisodium Citrate adds deionized water dissolving;
(2) six hydration nickel sulfate, sodium-chlor add deionized water dissolving;
(3) boric acid heating deionized water dissolving;
(4) pour (2) solution in (1) solution into, stir;
(5) (3) solution is poured in (4) solution, stirred.
3. the electrodeposit nickel plating method of a kind of deformation zinc alloy according to claim 1, it is characterized in that: the concentration of the sodium hydroxide solution in the described step 2 is 10mol/L.
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| CN2010101799437A CN101818368B (en) | 2010-05-21 | 2010-05-21 | Electrodeposit nickel plating method for deformation zinc alloy |
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| CN2010101799437A CN101818368B (en) | 2010-05-21 | 2010-05-21 | Electrodeposit nickel plating method for deformation zinc alloy |
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| CN101818368B true CN101818368B (en) | 2012-01-11 |
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| CN103966633B (en) * | 2013-02-01 | 2017-05-24 | 金华东威表面处理科技有限公司 | Nickel plating solution |
| CN103540968A (en) * | 2013-09-24 | 2014-01-29 | 成都泛华航空仪表电器有限公司 | Process method for electroplating nickel on aluminum-copper composite material component |
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