CN1831194A - Technology for chemical nickeling onto the surface of internal cavity of aluminium alloy radiator and equipment therefor - Google Patents
Technology for chemical nickeling onto the surface of internal cavity of aluminium alloy radiator and equipment therefor Download PDFInfo
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- CN1831194A CN1831194A CN 200510051381 CN200510051381A CN1831194A CN 1831194 A CN1831194 A CN 1831194A CN 200510051381 CN200510051381 CN 200510051381 CN 200510051381 A CN200510051381 A CN 200510051381A CN 1831194 A CN1831194 A CN 1831194A
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- plating
- nickel
- aluminium alloy
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- alloy radiator
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Abstract
The invention relates to aluminum alloy surface chemical coating layer technology and the device. It mainly includes coating pre-processing, alkaline coating, and acidity coating and nickel plate process. The technology process includes the following steps: designing main installation support, clip loading structure, and joggling structure. The clip loading structure is set in main installation support, and joggling structure is located outside the main installation support and connecting to the nickel coating device. The device makes the working liquid cycling inner cavity of the radiator, and it could finish nickel coating in one time clip loading to make the inner cavity coat equal and hard nickel coating layer. The invention has reasonable structure and technology and is high effective.
Description
Technical field
The present invention relates to the chemical plating technology and the device thereof of aluminum alloy surface, refer in particular to a kind of nickel chemical plating technology and device thereof of surface of internal cavity of aluminium alloy radiator.
Background technology
The Application Areas of chemical nickel plating is very wide, and since Brenner and Riddel obtained chemical Ni-P plating non-crystalline state coating first in nineteen forty-six in the solution of compositions such as nickel salt and hypophosphite since, chemical plating nickel technology had obtained developing rapidly.In recent decades, chemical plating Mi-P alloy is along with the expansion of range of application and improving constantly of utilisation technology, and its technical process is mainly following several.
1, direct method chemical plating Ni-P alloy process flow process
Oil removing → alkaline etching → bright dipping → alkaline electroless plating Ni-P alloy → aftertreatment;
2, electroplating bright process of tin flow process behind the conditioning processing chemical Ni-P plating
Oil removing → alkaline etching → bright dipping → conditioning processing → preimpregnation zinc → chemical plating Mi-P alloy → electroplating bright zinc;
3, the technical process of chemical Ni-P plating anticorrosion layer is handled in conditioning
Oil removing → alkaline etching → bright dipping → conditioning processing → chemical plating Mi-P alloy → aftertreatment;
4, soak chemical plating Ni-P alloy process flow process behind the zinc for twice
Oil removing → alkaline etching → bright dipping → twice is soaked zinc → chemical plating Mi-P alloy → aftertreatment;
5, soak zinc, twice chemical plating Ni-P alloy process flow process for twice
Oil removing → alkaline etching → bright dipping → twice is soaked zinc → alkaline electroless plating Ni-P alloy → acidic electroless Ni-P plating alloy → aftertreatment;
6, soak plating Ni-P alloy prior flow process behind the zinc reactivate for twice
Oil removing → alkaline etching → bright dipping → twice is soaked zinc → conditioning activation → aftertreatment;
Above technological process is stable and ripe gradually according to chemical working liq, is to get up carrying out the formation and development slowly of system after separating.Its polytechnic principle is similar substantially, and difference on plating technology and change are because of the starting material characteristics of workpiece with to being required to determine by the coating performance of plating workpiece.According to by some problems that often occur in the plating workpiece and the requirement for height of product performance, the processing requirement of chemical nickel plating is improved gradually, be mainly reflected in the bonding force of coating, the voidage of coating, the wear resisting property of coating, aspects such as the homogeneity of thickness of coating.Because aluminum alloy materials can not directly carry out chemical nickel plating, so adopted surperficial zinc layer processing mode, makes coating and matrix that good the combination be arranged in chemical nickel plating process like this, to reach the coating requirement.For seeking surface of internal cavity of aluminium alloy radiator is implemented the technical scheme of chemical nickel plating, use for reference on the existing technical foundation and with reference to below document;
1, Li Ning " electroless plating practical technique " Chemical Industry Press, 2004;
2, Zhu Zufang " aluminium alloy anode oxide and process for treating surface " Chemical Industry Press, 2004;
3, Jiang Xiaoxia, Shen Wei " electroless plating theoretical and put into practice " National Defense Industry Press, 2000;
4, Li Ning, Yuan Guo's big " Ni-based alloy theory of electroless plating and technology " press of Harbin Institute of Technology, 2000;
In the design of concrete technology, for avoiding causing simplification performance corrosive defective because of the chemical liquid that uses single character, adopt the preceding pretreatment technology of the acid plating that combines with basic treatment liquid, be to be different from the abrasive blasting that uses in the common process or the way of metal cleaner, because to implementing blasting craft in the chamber; Now use single metal cleaner then can cause great corrosion to aluminium alloy.Secondly, in technology, set up the washed with de-ionized water operation, to guarantee the thorough cleaning of workpiece.As for the plating device,,, select for use the organization plan of hanging frame type more suitable in conjunction with the constructional feature of scatterer with reference to the structure of plating technology devices such as existing rack plating, barrel plating and spraying plating.
The patent of invention content
Purpose of the present invention, be to propose a kind of technology of surface of internal cavity of aluminium alloy radiator chemical nickel plating and the technical scheme of device thereof, this scheme is achieved in that a kind of nickel chemical plating technology of surface of internal cavity of aluminium alloy radiator, it is characterized in that being made up of pretreatment process and nickel plating process; Nickel plating process comprises the acid plating of alkalescence plating, consisting of of alkali plating solution---single nickel salt 18～25 gram/L, ortho phosphorous acid are received 18～25 gram/L, complexing agent 60～85 gram/L, stablizer 20～50 gram/L, ammoniacal liquor 20～35 gram/L, the consisting of of acidic bath---and single nickel salt 23～35 gram/L, inferior sodium phosphate 23～35 gram/L, complexing agent 40～80 gram/L, stablizer 25～50 gram/L, ammoniacal liquor are an amount of; Pretreatment process comprises that oil removing → water cleans 2 times → alkaline etching → water and cleans 2 times → delustring → 2 times → deionized water of 2 times → zinc of water cleaning displacement → water cleaning protection; Nickel plating process comprises the washed with de-ionized water of the washed with de-ionized water → acidity plating → heating of alkalescence plating → heating; Oil removing operation in the pre-treatment uses the acidic aluminum grease-removing agent to clean at normal temperatures 3～4 minutes, and the deionized water protection in the pretreatment process is that at normal temperatures scavenging period must not surpass 1 hour, deionization electrical conductivity of water≤5 μ; The pH value of alkali plating solution is 7.2～7.54,76～80 ℃ of temperature, plating time 18～25 minutes, and the pH value of acidic bath is 3～4.5,76～80 ℃ of temperature, plating time 18～25 minutes; Using the temperature of heating washed with de-ionized water behind the nickel plating process is 80～85 ℃.
A kind of chemical nickel plating device of surface of internal cavity of aluminium alloy radiator, it is characterized in that comprising main shelve, clamping mechanism and the mechanism of flickering, clamping mechanism places in main the shelving, and the mechanism of flickering places outside main the shelving and connects main shelving, and main shelving is a framework that only is made of the seamed edge of hexahedron; Clamping mechanism comprises tubing, liquid returning tube, joint, upper and lower anchor clamps, and tubing is fixedly arranged in main middle part of shelving seamed edge under vertical two ends, and the tubing both sides respectively are provided with the joint that several and this pipe trench leads to; Liquid returning tube is fixedly arranged in main middle part of shelving seamed edge on vertical two ends, and the liquid returning tube both sides respectively are provided with the joint that several and this pipe trench leads to; Last anchor clamps place the master to shelve seamed edge on vertical both sides, and the number of last anchor clamps is corresponding with the joint number that liquid returning tube is put; Lower clamp places the master to shelve seamed edge under vertical both sides, and the number of lower clamp is corresponding with the joint number that tubing is put; Last lower clamp comprises handle, connecting rod, axle, obstruction and sealing-ring, the bottom of handle is articulated in and places the main both sides free bearing of seamed edge up and down of shelving, handle taps into the hinged connecting rod in suitable position of bottom, the connecting rod the other end is articulated in an end of axle, axle is placed through and is installed in the main both sides of shelving up and down in the sleeve block of seamed edge, and the front end of axle has the screw thread obstruction that spins; Tubing and liquid returning tube respectively have an end mouth of pipe to seal; Cylinder, hinge and free bearing, the base that mechanism comprises that connecting rod and piston are formed that flicker, main middle part of shelving basal edge limit, vertical two ends respectively is shaped on the hole and each connects with pivot pin with a free bearing, and free bearing is installed with on base; Main middle part of shelving seamed edge on the vertical end is installed with establishes the foraminous free bearing, and the connecting rod the other end of connection piston is porose is joined by hinge pin axis with hole free bearing.
Use this technology and install the chemical nickel plating of implementing surface of internal cavity of aluminium alloy radiator by such scheme, because device provided by the invention makes the only circular flow in regular turn in the scatterer chamber of various working fluids, not only nickel plating task to the lumen of radiator surface is just finished and realized to clamping, and, the plating technology reasonable in design and the preparation of working fluid are used, and cause the scatterer inner cavity surface to obtain even and solid nickel coating.Technology of the present invention and device are simple and direct rationally, practical and effective.
Description of drawings
Fig. 1 is the schematic appearance of nickel plating device of the present invention;
Fig. 2 looks synoptic diagram for the master of nickel plating device of the present invention;
Fig. 3 looks synoptic diagram for the left side of nickel plating device of the present invention;
Fig. 4 is the clamp structure synoptic diagram in the device;
Fig. 5 is the local structure decomposing schematic representation of clamping mechanism and scatterer.
Embodiment
Now specify in conjunction with a kind of suitable technical process and device.This technical process comprises the preceding pre-treatment of plating and nickel plating process two portions.Wherein, pre-treatment is before the plating: oil removing (adopt acidic aluminum cleaning by degreasing 3～4 minutes) → water cleans 2 times → alkaline etching (with the sodium-hydroxide treatment of 40%～50% concentration 2～3 minutes) → water and cleans 2 times → delustring (making the delustring neutralizing treatment 1～2.5 minute with salpeter solution) → water and clean 2 times → zinc displacement (handling 0.5～1 minute with zinc sulfate, zinc nitrate, sodium hydroxide, copper sulfate, solution of zinc sulfate) → 2 times → deionized water of water cleaning and protect (promptly carrying out 50 minutes cleaning with specific conductivity less than the pure water of 5 μ); Nickel plating process is: the alkalescence plating---with pH value is that 7.2 (or 7.54) are by single nickel salt NiSO
46H
2O～18 (or 25) gram/L, ortho phosphorous acid are received NAH
2PO
2H
2O～18 (or 25) gram/L, complexing agent～60 (or 85) gram/L, stablizer～20 (or 50) gram/L, ammoniacal liquor～20 (or 35) gram/L that form by sodium-acetate, citric acid, oxysuccinic acid etc. form temperature be the plating of carrying out 18 (or 25) minute of the plating bath of 76 (or 80) ℃ → with the deionized water of 80 ℃ of temperature clean → be that 3 (or 4.5) are by single nickel salt NiSO with pH value
46H
2O～23 (or 35) gram/L, ortho phosphorous acid are received NAH
2PO
2H
2It is the plating bath of 76 (or 80) ℃ plating of carrying out 18 (or 25) minute → clean with the deionized water of 85 ℃ of temperature that O～23 (or 35) gram/L, complexing agent～40 (or 80) gram/L, stablizer～25 (or 50) gram/L, the proper ammonia be made up of sodium-acetate, citric acid, oxysuccinic acid etc. are formed temperature.Except that the composition of above-mentioned alkali, acidic bath, can also recommend one group of preferable plating bath preparation, wherein, and alkali plating solution---by the single nickel salt NiSO of 22 gram/L
46H
2The ortho phosphorous acid of O, 22 gram/L is received NAH
2PO
2H
2The ammoniacal liquor of the complexing agent that O, the sodium-acetate by 72 gram/L, citric acid, oxysuccinic acid etc. are formed, the stablizer of 33 gram/L, 32 gram/L is formulated; Acidic bath is by the NiSO of single nickel salt 29 gram/L
46H
2The ortho phosphorous acid of O, 29 gram/L is received NAH
2PO
2H
2Complexing agent, the stablizer of 38 gram/L, proper ammonia that O, the sodium-acetate by 60 gram/L, citric acid, oxysuccinic acid etc. are formed are formulated.Selected pH value is adjusted in the plating process in the above-mentioned corresponding scope and is got final product.
In order to finish above-mentioned technical process, designed Fig. 1～Fig. 6 for implementing the apparatus structure synoptic diagram of this chemical nickel plating, now specify for embodiment with regard to a kind of nickel plating device of clamping 50 sheet heat radiators in conjunction with the accompanying drawings.It is to be welded into a framework that the hexahedron seamed edge is only arranged by angle steel that the master shelves 1, in main the shelving but the once clamping mechanism of clamping 50 sheet heat radiators is set---comprise tubing 22 and place each 25 joint 220 of managing both sides, liquid returning tube 21 and place each 25 joints 210 of pipe both sides, on, lower clamp 20, wherein, tubing 22 places the main following seamed edge 100 at 1 vertical two ends of shelving, liquid returning tube 21 places the main last seamed edge 101 at 1 vertical two ends of shelving, last anchor clamps 20 place the main last seamed edge 111 of 1 vertical both sides of shelving, its number is that 25 and 25 joints 210 putting with liquid returning tube 21 both sides are corresponding, with example, lower clamp 20 places main shelves the following seamed edge 110 of 1 vertical both sides, and it is corresponding to be equipped with 25 and 25 joints 220 putting with tubing 22 both sides equally.Said anchor clamps 20 are made up of handle 201, connecting rod 202, axle 203, axle sleeve 204 obstructions 205, spiral 206 and sealing-ring 207, the bottom hinge of handle 201 places and is fixed on the main free bearing of shelving 208, the two ends of connecting rod 202 respectively are pinned at the suitable position of handle 201 and an end of axle 203, axle 203 is placed through axle sleeve 204 slidably, the other end of axle 203 is shaped on screw thread (or screw rod) 206 and can spins with obstruction 205 (being used for fine setting), stops up 205 medial surfaces and also is equipped with sealing-ring 207 (sealing when being used for clamping).Cylinder 30, hinge 32,34 and free bearing 31,33, the base 4 that mechanism comprises that connecting rod 302 and piston 301 formed flickers, main middle part of shelving seamed edge 100 under 1 vertical rear and front end respectively be shaped on the hole and respectively with a free bearing 33 with axle 34 pin joints, free bearing 33 is fixedly arranged on the base 4; Main middle part of shelving seamed edge 101 on vertical rear end is installed with establishes foraminous free bearing 31, and the other end of the connecting rod 302 of connection piston is shaped on the hole of hole and free bearing 31 is joined by hinge 32 pins, and cylinder 30 is fixed on the parts of leading outside shelving.When implementing the technological process of nickel plating, the interface 50 of scatterer about in the of 5 is penetrated the joint 220 (210) of tubing 22 and liquid returning tube 21, clamping and sealed scatterer 5 when---driving 202 whiles of the connecting rod hinged with it promotes to the scatterer direction---and slided in axle sleeve 204 by connecting rod 202 impeller-hubs 203---causes the obstruction 205 that is rotatably connected in this male thread section 206 to penetrate interface 50 simultaneously to scatterer direction driving handle 201.By this step, finish clamping successively at each 25 sheet heat radiator of defeated (returning) liquid pipe both sides, promptly can be in the scatterer chamber thereafter and inject various working fluids by set operation.Working fluid is flowed out by up liquid returning tube 21 by descending tubing 22 adverse current behind each sheet heat radiator 5 of joint 220 injection both sides and circulates.For guaranteeing all even compactness of plating bath in the chamber, the aforesaid mechanism of flickering is in running order all the time in the plating flow process, be that cylinder 30 two ends intermittently feed high-pressure air and make piston 301 to-and-fro movements, cause connecting rod 302 pulling hinges 32 and drive that main to shelve 1 serve as spool to wave as camber line along the hinge 34 with the two ends, front and back, main shelve 1 swing and drive each sheet heat radiator that is clamped in it and swing, cause plating bath in the chamber to shake and guaranteed even the causing property of coating.Illustrated 2101 is the sealing-ring in the joint.
Claims (15)
1, a kind of nickel chemical plating technology of surface of internal cavity of aluminium alloy radiator is characterized in that being made up of pretreatment process and nickel plating process.
2, by the nickel chemical plating technology of the described surface of internal cavity of aluminium alloy radiator of claim 1, it is characterized in that nickel plating process comprises alkalescence plating and acid plating,
Consisting of of alkali plating solution;
Single nickel salt 18～25 gram/L
Inferior sodium phosphate 18～25 gram/L
Complexing agent 60～85 gram/L
Stablizer 20～50 gram/L
Ammoniacal liquor 20～35 gram/L
Consisting of of acidic bath;
Single nickel salt 23～35 gram/L
Inferior sodium phosphate 23～35 gram/L
Complexing agent 40～80 gram/L
Stablizer 25～50 gram/L
Ammoniacal liquor is an amount of.
3,, it is characterized in that pretreatment process comprises that oil removing → water cleans 2 times → alkaline etching → water and cleans 2 times → delustring → 2 times → deionized water of 2 times → zinc of water cleaning displacement → water cleaning protection by the nickel chemical plating technology of the described surface of internal cavity of aluminium alloy radiator of claim 1.
4,, it is characterized in that nickel plating process comprises the washed with de-ionized water of the washed with de-ionized water → acidity plating → heating of alkalescence plating → heating by the nickel chemical plating technology of the described surface of internal cavity of aluminium alloy radiator of claim 1.
5,, it is characterized in that the oil removing operation in the pre-treatment uses the acidic aluminum grease-removing agent to clean at normal temperatures 3～4 minutes by the nickel chemical plating technology of claim 1 or 3 described surface of internal cavity of aluminium alloy radiator.
6,, it is characterized in that deionized water protection in the pretreatment process is that at normal temperatures scavenging period must not surpass 1 hour, deionization electrical conductivity of water≤5 μ by the nickel chemical plating technology of claim 1 or 3 described surface of internal cavity of aluminium alloy radiator.
7, by the nickel chemical plating technology of claim 1 or 4 described surface of internal cavity of aluminium alloy radiator, the pH value that it is characterized in that alkali plating solution is 7.2～7.54,76～80 ℃ of temperature, plating time 18～25 minutes.
8, by the nickel chemical plating technology of claim 1 or 4 described surface of internal cavity of aluminium alloy radiator, the pH value that it is characterized in that acidic bath is 3～4.5,76～80 ℃ of temperature, plating time 18～25 minutes.
9,, it is characterized in that it is 80～85 ℃ that nickel plating process uses the temperature of heating washed with de-ionized water, its deionization electrical conductivity of water≤5 μ by the nickel chemical plating technology of claim 1 or 4 described surface of internal cavity of aluminium alloy radiator.
10, a kind of chemical nickel plating device of surface of internal cavity of aluminium alloy radiator, it is characterized in that comprising main shelve, clamping mechanism and the mechanism of flickering, clamping mechanism places in main the shelving, the mechanism of flickering places outside main the shelving and connects main shelving.
11,, it is characterized in that main shelving is a framework that only is made of the seamed edge of hexahedron by the chemical nickel plating device of the described surface of internal cavity of aluminium alloy radiator of claim 10.
12, press the chemical nickel plating device of claim 10 or 11 described surface of internal cavity of aluminium alloy radiator, it is characterized in that clamping mechanism comprises tubing, liquid returning tube, joint, upper and lower anchor clamps, tubing is fixedly arranged in main middle part of shelving seamed edge under vertical two ends, and the tubing both sides respectively are provided with the joint that several and this pipe trench leads to; Liquid returning tube is fixedly arranged in main middle part of shelving seamed edge on vertical two ends, and the liquid returning tube both sides respectively are provided with the joint that several and this pipe trench leads to; Last anchor clamps place the master to shelve seamed edge on vertical both sides, and the number of last anchor clamps is corresponding with the joint number that liquid returning tube is put; Lower clamp places the master to shelve seamed edge under vertical both sides, and the number of lower clamp is corresponding with the joint number that tubing is put.
13, press the chemical nickel plating device of the described surface of internal cavity of aluminium alloy radiator of claim 12, it is characterized in that upper and lower anchor clamps comprise handle, connecting rod, axle, obstruction and sealing-ring, the bottom of handle is articulated in and places the main both sides free bearing of seamed edge up and down of shelving, handle taps into the hinged connecting rod in suitable position of bottom, the connecting rod the other end is articulated in an end of axle, axle is placed through and is installed in main shelving in the sleeve block of the upper and lower seamed edge in both sides, and the front end of axle has the screw thread obstruction that spins.
14, by the chemical nickel plating device of the described surface of internal cavity of aluminium alloy radiator of claim 12, it is characterized in that tubing and liquid returning tube respectively have an end mouth of pipe to seal.
15, press the chemical nickel plating device of the described surface of internal cavity of aluminium alloy radiator of claim 10, cylinder, hinge and free bearing, the base that mechanism comprises that connecting rod and piston are formed is characterized in that flickering, main middle part of shelving basal edge limit, vertical two ends respectively is shaped on the hole and each connects with pivot pin with a free bearing, and free bearing is installed with on base; Main middle part of shelving seamed edge on the vertical end is installed with establishes the foraminous free bearing, and the connecting rod the other end of connection piston is porose is joined by hinge pin axis with hole free bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510051381 CN1831194A (en) | 2005-03-08 | 2005-03-08 | Technology for chemical nickeling onto the surface of internal cavity of aluminium alloy radiator and equipment therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510051381 CN1831194A (en) | 2005-03-08 | 2005-03-08 | Technology for chemical nickeling onto the surface of internal cavity of aluminium alloy radiator and equipment therefor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101096764B (en) * | 2007-06-29 | 2010-05-19 | 东莞市通旺达五金制品有限公司 | Aluminum and aerobronze composite heat sink chemical etching partial electroplating or chemical plating process |
| CN101760729B (en) * | 2009-08-10 | 2011-11-30 | 海洋王照明科技股份有限公司 | Pretreatment activating solution and pretreatment method for chemical nickel-plating of aluminum and aluminum alloy |
| CN101709459B (en) * | 2009-11-06 | 2012-10-31 | 海洋王照明科技股份有限公司 | Surface treatment method of aluminum alloy and treatment liquid |
| WO2013059980A1 (en) * | 2011-10-25 | 2013-05-02 | 建业（惠州）电路版有限公司 | Process for chemical plating of nickel and gold on circuit board |
| CN106367741A (en) * | 2016-11-15 | 2017-02-01 | 江门荣胜机电有限公司 | Oilless piston machine pressure-casting aluminum air cylinder and chemical nickel plating process thereof |
-
2005
- 2005-03-08 CN CN 200510051381 patent/CN1831194A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101096764B (en) * | 2007-06-29 | 2010-05-19 | 东莞市通旺达五金制品有限公司 | Aluminum and aerobronze composite heat sink chemical etching partial electroplating or chemical plating process |
| CN101760729B (en) * | 2009-08-10 | 2011-11-30 | 海洋王照明科技股份有限公司 | Pretreatment activating solution and pretreatment method for chemical nickel-plating of aluminum and aluminum alloy |
| CN101709459B (en) * | 2009-11-06 | 2012-10-31 | 海洋王照明科技股份有限公司 | Surface treatment method of aluminum alloy and treatment liquid |
| WO2013059980A1 (en) * | 2011-10-25 | 2013-05-02 | 建业（惠州）电路版有限公司 | Process for chemical plating of nickel and gold on circuit board |
| CN103222348A (en) * | 2011-10-25 | 2013-07-24 | 建业（惠州）电路版有限公司 | Process for chemical plating of nickel and gold on circuit board |
| CN106367741A (en) * | 2016-11-15 | 2017-02-01 | 江门荣胜机电有限公司 | Oilless piston machine pressure-casting aluminum air cylinder and chemical nickel plating process thereof |
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