CN1614087A - Chemical nickeling solution, method for preparing nickeling layer and aluminium alloy hub coating thereof - Google Patents

Chemical nickeling solution, method for preparing nickeling layer and aluminium alloy hub coating thereof Download PDF

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Publication number
CN1614087A
CN1614087A CN 200410043924 CN200410043924A CN1614087A CN 1614087 A CN1614087 A CN 1614087A CN 200410043924 CN200410043924 CN 200410043924 CN 200410043924 A CN200410043924 A CN 200410043924A CN 1614087 A CN1614087 A CN 1614087A
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nickel
plating
chemical
layer
acid
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CN100343419C (en
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胡信国
戴长松
王殿龙
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

The invention was involved in a chemical nickel-plating liquid, its method and aluminum alloy wheel boss coating thereby. The said liquid contains 5.6-6.0g,/L Ni2+, 25-30g/L NaH2PO2.H2O, 10-45g/L ligand, 0-20g/L phosphorus inhibiter and 5-30g/L buffering agent. The treated aluminum alloy wheel boss was immersed into the above liquid to form chemical nickel coating by the method. The aluminum alloy wheel boss coating consist of electroplated pre-plating coating, electro-coppering, three-layer nickels, nickel closing layer, bright chrome layer and chemical nickel coating which was located in pre-plating coating or mediate layer of aluminum alloy wheel boss coating. The corrosion resistance of coating was improved obviously. It could endure over 88h on CASS test.

Description

Chemical nickel-plating solution and prepare the method and the aluminium alloy wheel hub coating of nickel layer with it
Technical field:
The present invention relates to a kind of chemical nickel-plating solution and prepare the method for chemical Ni-plating layer and the aluminium alloy wheel hub coating of forming by the nickel layer for preparing with this chemical nickel-plating solution with this chemical nickel-plating solution.
Background technology:
70~eighties of 20th century aluminium alloy wheel hub since have in light weight, thermal conductivity good, processibility good and easily realize planner's creative thinking, so progressively replaces the iron and steel wheel hub, and obtained develop rapidly.The aluminium wheel hub process for treating surface of normal employing is to spray paint.Along with improving constantly of people's living standard, the Electroplating Aluminum wheel hub has obtained the increasing market requirement with its outward appearance light, luxurious and characteristics that solidity to corrosion is good.Present global Electroplating Aluminum wheel hub production firm, the technology of employing is to electroplate nickel preplating (twice), electroplating acid copper, three layers of nickel, nickel envelope and bright chromium mostly.Because the complicacy of wheel hub shape, electronickelling pre-plating layer thickness distribution is very inhomogeneous, and current density lower coating approaches, do not work, and needs polished finish after the preplating, so Electroplating Aluminum wheel hub solidity to corrosion and product percent of pass are lower, can not satisfy the demand in market far away.
Summary of the invention:
The present invention provides a kind of chemical nickel-plating solution and prepares the method and the aluminium alloy wheel hub coating of nickel layer with it in order to solve the needs that present aluminium alloy wheel hub coating can not satisfy high anti-corrosion (acetic acid quickens salt-fog test-CASS and tested 88 hours).Chemical nickel-plating solution of the present invention is grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/l phosphorus inhibitor, 5~30g/l buffer reagent.The method for preparing chemical Ni-plating layer with chemical nickel-plating solution is achieved in that the chemical nickel-plating solution that a, preparation are grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/lNaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/l phosphorus inhibitor, 5~30g/l buffer reagent, regulating pH is 4.3~7.3; B, treated aluminium alloy wheel hub is dipped in the above-mentioned solution, under the condition of (78~88) ± 2 ℃, carries out plating 20~30min, obtain chemical Ni-plating layer.Comprise plating pre-nickel plating, electroplating acid copper layer, three layers of nickel, nickel seal and bright chromium layer by the aluminium alloy wheel hub coating of forming with the nickel layer of this chemical nickel-plating solution preparation, it also comprises chemical Ni-plating layer, chemical Ni-plating layer is positioned at the pre-plating layer or the middle layer of aluminium alloy wheel hub coating, and described chemical Ni-plating layer is to obtain like this: the chemical nickel-plating solution that a, preparation are grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/l phosphorus inhibitor, 5~30g/l buffer reagent, regulating pH is 4.3~7.3; B, treated aluminium alloy wheel hub is dipped in the above-mentioned solution, plating 20~30min under the condition of (78~88) ± 2 ℃ obtains chemical Ni-plating layer.Aluminium alloy wheel hub high anti-corrosion coating of the present invention is at traditional plating nickel preplating (twice), on the technology basis of electroplating acid copper, three layers of nickel, nickel envelope and bright chromium, has added chemical Ni-plating layer.Chemical Ni-plating layer can be a pre-plating layer, also can be the middle layer, and wherein chemical nickel-plating solution is neutrality or acidic solution, because aluminium is amphoteric metal, relatively more active, in chemical nickel-plating solution, etch reaction easily taking place, cause binding force of cladding material to descend, even bubbles and peel off.If contain SO in the EN solution 4 2-Ion and Cl -Ion, its erosion will increase so, simultaneously Cl -The ionic accumulation has increased the tensile stress of coating and has reduced the solidity to corrosion of coating, and Cl -Ion and SO 4 2-The ionic accumulation has reduced Ni 2+And H 2PO 2 2-Velocity of diffusion, thereby reduced the sedimentation velocity of plating bath.Do not contain Cl in the chemical nickel-plating solution of the present invention -Ion and SO 4 2-Ion.The present invention only needs to improve a little on the basis of traditional technology, just can implement, and the corrosion resistance of coating of acquisition improves greatly, more than the CASS test 88h.
Embodiment:
Embodiment one: the chemical nickel-plating solution of present embodiment is grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/l phosphorus inhibitor, 5~30g/l buffer reagent.Described ligand is one or more the mixture in lactic acid, citric acid, glycine, Succinic Acid, oxyacetic acid, propionic acid, oxysuccinic acid, pentanedioic acid, triethanol ammonium, the ammonium chloride; Described phosphorus inhibitor is one or more the mixture in ammonium sulfate, ammonium chloride, the sodium wolframate; Described buffer reagent is one or more the mixture in sodium acetate, Sodium Propionate, the boric acid.Described Ni 2+Form with nickelous carbonate or basic nickel carbonate adds.
Embodiment two: the acid chemical plating nickel solution of present embodiment is grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~25g/l 1 #Ligand, 10~20g/l2 #Ligand, 5~30g/l buffer reagent.Described 1 #Ligand is one or more the mixture in lactic acid, citric acid, glycine, Succinic Acid, the oxyacetic acid; Described 2 #Ligand is one or more the mixture in propionic acid, oxysuccinic acid, Succinic Acid, the pentanedioic acid; Described buffer reagent is one or more the mixture in sodium acetate, Sodium Propionate, the boric acid.
Embodiment three: the acid chemical plating nickel solution of present embodiment is grouped into by following one-tenth: 5.8g/l NiCO 3, 28g/l NaH 2PO 2H 2O, 18g/l glycine, 15g/l pentanedioic acid, 20g/l sodium acetate.
Embodiment four: the neutral chemical nickel-plating solution of present embodiment is grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~25g/l ligand, 10~20g/l phosphorus inhibitor, 5~30g/l buffer reagent.Described ligand is one or more the mixing in lactic acid, citric acid, propionic acid, triethanol ammonium, the ammonium chloride; Described phosphorus inhibitor is one or more the mixing in ammonium sulfate, ammonium chloride, the sodium wolframate; Described buffer reagent is one or more the mixing in sodium acetate, Sodium Propionate, the boric acid.
Embodiment five: the neutral chemical nickel-plating solution of present embodiment is grouped into by following one-tenth: 5.7g/l Ni 2+, 26g/l NaH 2PO 2H 2O, 20g/l triethanol ammonium, 15g/l ammonium sulfate, 15g/l Sodium Propionate.
Embodiment six: the method for preparing nickel layer with chemical nickel-plating solution of present embodiment is achieved in that the chemical nickel-plating solution that a, preparation are grouped into by following one-tenth: 5.6~6.0g/l NiCO 3, 25~30g/l NaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/ phosphorus inhibitor, 5~30g/l buffer reagent, regulating pH is 4.3~7.3; B, treated aluminium alloy wheel hub is dipped in the above-mentioned solution, plating 20~30min under the condition of (78~88) ± 2 ℃ obtains chemical Ni-plating layer.
Embodiment seven: the method for preparing nickel layer with acid chemical plating nickel solution of present embodiment is achieved in that the acid chemical plating nickel solution that a, preparation are grouped into by following one-tenth: 5.6~6.0g/lNi 2+, 25~30g/l NaH 2PO 2H 2O, 10~25g/l 1 #Ligand, 10~20g/l 2 #Ligand, 5~30g/l buffer reagent, regulating pH is 4.3~4.9; B, treated aluminium alloy wheel hub is dipped in the above-mentioned solution, plating 20~30min obtains chemical Ni-plating layer under 88 ± 2 ℃ condition.
Embodiment eight: the method for preparing nickel layer with neutral chemical nickel-plating solution of present embodiment is achieved in that the neutral chemical nickel-plating solution that a, preparation are grouped into by following one-tenth: 5.6~6.0g/lNi 2+, 25~30g/l NaH 2PO 2H 2O, 10~25g/l ligand, 10~20g/l phosphorus inhibitor, 5~30g/l buffer reagent, regulating pH is 6.8~7.3; B, treated aluminium alloy wheel hub is dipped in the above-mentioned solution, plating 20~30min obtains chemical Ni-plating layer under 78 ± 2 ℃ condition.
Embodiment nine: the aluminium alloy wheel hub coating by forming with the nickel layer of this chemical nickel-plating solution preparation of present embodiment comprises electroplates pre-nickel plating, electroplating acid copper layer, three layers of nickel, nickel seal and bright chromium layer, it also comprises chemical Ni-plating layer, chemical Ni-plating layer is positioned at the pre-plating layer or the middle layer of aluminium alloy wheel hub coating, and described chemical Ni-plating layer is to obtain like this: the chemical nickel-plating solution that a, preparation are grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/l phosphorus inhibitor, 5~30g/l buffer reagent, regulating pH is 4.3~7.3; B, treated aluminium alloy wheel hub is dipped in the above-mentioned solution, plating 20~30min under the condition of (78~88) ± 2 ℃ obtains chemical Ni-plating layer.
Embodiment ten: present embodiment is achieved in that for the window degree of depth to be the cast aluminium alloy wheel hub of 28cm, adopt 500 in neutral low temperature chemcial plating nickel → electroplating acid copper → dark nickel → semi-bright nickel → bright nickel → nickel envelope → decorative chromium plating, 10 of traditional technology platings (electric nickel preplating does not adopt the pictograph anode).Found that: adopt the traditional technology method, can't obtain complete pre-plating layer, and adopt present embodiment can obtain complete, bright and uniform coating, different aluminum aluminium alloy hub coating qualification rate and solidity to corrosion the results are shown in Table 1.
Table 1
The window degree of depth/cm Method 1 coating Tradition coating
Qualification rate/% CASS test/h Qualification rate/% CASS test/h
????28 ????93 ????88 ????0 ????/
Embodiment 11: it is the cast aluminium alloy wheel hub of 12cm that present embodiment is achieved in that for the window degree of depth, adopts neutral low temperature chemcial plating nickel → electroplating acid copper → dark nickel → semi-bright nickel → bright nickel → nickel envelope → decorative chromium (method 1) and 500 wheel hubs of each plating of traditional electrical electroplating method.Table 2 adopts the thickness distribution of the plating time and the pre-plating layer of different pre-plating process for the window degree of depth is the cast aluminium alloy wheel hub of 12cm, and wheel hub different sites thickness of coating adopts electrolytic process to measure.Corrosion resistance of coating sees Table 3, and by experimental result as can be known: the pre-plating with electroless nickel of method 1 has the incomparable homogeneity of traditional electrical nickel preplating.This is because pre-plating with electroless nickel is compared with the electronickelling pre-plating layer, does not exist because electric current distribution is inhomogeneous, and the ununiformity of the thickness distribution of bringing.Because electronickelling pre-plating layer maximum ga(u)ge differs more than the 20 μ m, so the general performance of electronickelling pre-plating layer goes out relatively poor protective.
Table 2
Pre-plating layer Plating time/min Maximum ga(u)ge/μ m Minimum thickness/μ m
Method 1 (EN pre-plating layer) ????20 ????6.5 ????6.3
Traditional electrical nickel plating pre-plating layer ????40 ????26.3 ????3.5
Table 3 different aluminum aluminium alloy hub coating qualification rate and solidity to corrosion
The window degree of depth/cm Method 1 coating Tradition coating
Qualification rate/% CASS test/h Qualification rate/% CASS test/h
????12 ????95 ????88 ????75 ????22
Embodiment 12: present embodiment is achieved in that for the window degree of depth to be the cast aluminium alloy wheel hub of 12cm, adopt and electroplate watt nickel → acid chemical plating nickel → plating watt nickel → electroplating acid copper → semi-bright nickel → bright nickel → nickel envelope → decorative chromium (method 2) and 100 wheel hubs of each plating of traditional electrical electroplating method, different aluminum aluminium alloy hub coating qualification rate and corrosion resistant test the results are shown in Table 4, employing method 2 is implemented acid chemical plating nickel behind electric nickel preplating, the aluminium alloy wheel hub corrosion resistance of coating of acquisition is better.
Table 4
The window degree of depth/cm Method 2 coating Tradition coating
Qualification rate/% CASS test/h Qualification rate/% CASS test/h
????12 ????92 ????88 ????75 ????24
Embodiment 13: present embodiment is achieved in that for the window degree of depth to be the cast aluminium alloy wheel hub of 12cm, adopt and electroplate watt nickel → electroplating acid copper → acid chemical plating nickel → dark nickel → semi-bright nickel → bright nickel → nickel envelope → decorative chromium (method 3) and 100 wheel hubs of each plating of traditional electrical electroplating method, test-results sees Table 5, employing method 3 is implemented acid chemical plating nickel behind electroplating acid copper, the aluminium alloy wheel hub corrosion resistance of coating of acquisition is better.
Table 5
The window degree of depth/cm Method 3 coating Tradition coating
Qualification rate/% CASS test/h Qualification rate/% CASS test/h
????12 ????93 ????88 ????75 ????22
Embodiment 14: present embodiment is achieved in that for the window degree of depth to be the cast aluminium alloy wheel hub of 12cm, adopt neutral low temperature chemcial plating nickel → plating watt nickel → acid chemical plating nickel (middle phosphorus or high phosphorus) → electronickelling → plating alkaline copper plating → electroplating acid copper → semi-bright nickel → full bright nickel → decorative chromium (method 4) and 100 wheel hubs of each plating of traditional electrical electroplating method, test-results sees Table 6, employing method 4 is implemented acid chemical plating nickel behind electroplating acid copper, the aluminium alloy wheel hub corrosion resistance of coating of acquisition is better.
Table 6
The window degree of depth/cm Method 4 coating Tradition coating
Qualification rate/% CASS test/h Qualification rate/% CASS test/h
????12 ????92 ????88 ????75 ????24

Claims (10)

1, chemical nickel-plating solution is characterized in that it is grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/l phosphorus inhibitor, 5~30g/l buffer reagent.
2, chemical nickel-plating solution according to claim 1 is characterized in that described ligand is one or more the mixture in lactic acid, citric acid, glycine, Succinic Acid, oxyacetic acid, propionic acid, oxysuccinic acid, pentanedioic acid, triethanol ammonium, the ammonium chloride.
3, chemical nickel-plating solution according to claim 1 is characterized in that described phosphorus inhibitor is one or more the mixture in ammonium sulfate, ammonium chloride, the sodium wolframate.
4, chemical nickel-plating solution according to claim 1 is characterized in that described buffer reagent is one or more the mixture in sodium acetate, Sodium Propionate, the boric acid.
5, chemical nickel-plating solution according to claim 1 is characterized in that it is grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~25g/l 1 #Ligand, 10~20g/l 2 #Ligand, 5~30g/l buffer reagent.
6, chemical nickel-plating solution according to claim 1 is characterized in that it is grouped into by following one-tenth: 5.8g/l NiCO 3, 28g/l NaH 2PO 2H 2O, 18g/l glycine, 15g/l pentanedioic acid, 20g/l sodium acetate.
7, chemical nickel-plating solution according to claim 1 is characterized in that it is grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~25g/l ligand, 10~20g/l phosphorus inhibitor, 5~30g/l buffer reagent.
8, chemical nickel-plating solution according to claim 1 is characterized in that it is grouped into by following one-tenth: 5.7g/l NiCO 3, 2g/l NaH 2PO 2H 2O, 20g/l triethanol ammonium, 15g/l ammonium sulfate, 15g/l Sodium Propionate.
9, the method for preparing nickel layer with chemical nickel-plating solution according to claim 1 is characterized in that it is achieved in that the chemical nickel-plating solution that a, preparation are grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/l phosphorus inhibitor, 5~30g/l buffer reagent, regulating pH is 4.3~7.3; B, treated aluminium alloy wheel hub is dipped in the above-mentioned solution, plating 20~30min under the condition of (78~88) ± 2 ℃ obtains chemical Ni-plating layer.
10, by the aluminium alloy wheel hub coating of forming with the nickel layer of the described chemical nickel-plating solution preparation of claim 9, it comprises electroplates pre-nickel plating, electroplating acid copper layer, three layers of nickel, nickel seal and bright chromium layer, it is characterized in that it also comprises chemical Ni-plating layer, chemical Ni-plating layer is positioned at the pre-plating layer or the middle layer of aluminium alloy wheel hub coating, and described chemical Ni-plating layer is to obtain like this: the chemical nickel-plating solution that a, preparation are grouped into by following one-tenth: 5.6~6.0g/l Ni 2+, 25~30g/l NaH 2PO 2H 2O, 10~45g/l ligand, 0~20g/l phosphorus inhibitor, 5~30g/l buffer reagent, regulating pH is 4.3~7.3; B, treated aluminium alloy wheel hub is dipped in the above-mentioned solution, plating 20~30min under the condition of (78~88) ± 2 ℃ obtains chemical Ni-plating layer.
CNB2004100439246A 2004-10-11 2004-10-11 Chemical nickeling solution, method for preparing nickeling layer and aluminium alloy hub coating thereof Expired - Fee Related CN100343419C (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
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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
CN103484839A (en) * 2013-10-10 2014-01-01 江门市九星科技材料有限公司 Metal surface treatment reagent for cyanide-free chemical plating or cyanide-free electroplating, and metal surface treatment method
CN105586580A (en) * 2014-11-18 2016-05-18 中国科学院兰州化学物理研究所 Method for medium-low temperature quick chemical plating of Ni-P based on copper leaching and plating pretreatment
CN106756904A (en) * 2016-12-16 2017-05-31 贵阳华科电镀有限公司 A kind of high phosphorus chemical plating nickel liquid
CN108866517A (en) * 2018-07-03 2018-11-23 广东工业大学 A kind of unglazed chemical nickel plating preparation method
CN109423670A (en) * 2017-08-21 2019-03-05 珠海市椿田机械科技有限公司 The preparation method and its electroplate liquid of track copper bar plating nickel on surface tungsten phosphorus alloy

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CN1301881A (en) * 1999-12-29 2001-07-04 上海雅驰科技发展有限公司 Chemical nickel-plating solution and its preparation and using method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN103484839A (en) * 2013-10-10 2014-01-01 江门市九星科技材料有限公司 Metal surface treatment reagent for cyanide-free chemical plating or cyanide-free electroplating, and metal surface treatment method
CN103484839B (en) * 2013-10-10 2016-03-02 江门市九星科技材料有限公司 A kind of metal finishing reagent without cyanogen electroless plating or cyanideless electro-plating and method
CN105586580A (en) * 2014-11-18 2016-05-18 中国科学院兰州化学物理研究所 Method for medium-low temperature quick chemical plating of Ni-P based on copper leaching and plating pretreatment
CN106756904A (en) * 2016-12-16 2017-05-31 贵阳华科电镀有限公司 A kind of high phosphorus chemical plating nickel liquid
CN109423670A (en) * 2017-08-21 2019-03-05 珠海市椿田机械科技有限公司 The preparation method and its electroplate liquid of track copper bar plating nickel on surface tungsten phosphorus alloy
CN108866517A (en) * 2018-07-03 2018-11-23 广东工业大学 A kind of unglazed chemical nickel plating preparation method
CN108866517B (en) * 2018-07-03 2020-04-17 广东工业大学 Preparation method of matt chemical nickel plating

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