CN105568079A - Transition layer electroplating liquid for die-cast high-strength aluminum alloy - Google Patents
Transition layer electroplating liquid for die-cast high-strength aluminum alloy Download PDFInfo
- Publication number
- CN105568079A CN105568079A CN201610051926.2A CN201610051926A CN105568079A CN 105568079 A CN105568079 A CN 105568079A CN 201610051926 A CN201610051926 A CN 201610051926A CN 105568079 A CN105568079 A CN 105568079A
- Authority
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- China
- Prior art keywords
- transition layer
- solution
- zinc
- electronickelling
- treatment solution
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/52—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating using reducing agents for coating with metallic material not provided for in a single one of groups C23C18/32 - C23C18/50
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
Abstract
The invention discloses transition layer electroplating liquid for a die-cast high-strength aluminum alloy. The high-strength aluminum alloy consists of the following components in percentage by weight: 7-9% of Zn, 12-14% of Si, 6-8% of Cu, 2-4% of Mn, 0.8-1.2% of Ti, 0.3-0.5% of Re, 3-5% of Mg, 1-3% of Zr, 0.6-0.8% of Ni, and the balance of Al and inevitable impurities; the transition layer electroplating liquid comprises two parts: one part is zinc settling treatment liquid, and the other part is electronickelling treatment liquid; the two parts of treatment liquid are matched for use before and after; the zinc settling treatment liquid comprises 60-80 g/L of sodium oxide, 40-60 g/L of zinc oxide, 100-120 g/L of potassium sodium tartrate, 3-5 g/L of ferric chloride, and 3-5 g/L of sodium nitrate; and the electronickelling treatment liquid comprises 160-180 g/L of NiSO4.6H2O, 0.6-0.8 mol/L of F-, 20-30 g/L of boric acid, 22-24 g/L of (NH4)3C6H5O7, and 1-3 g/L of saccharin sodium.
Description
Technical field
The present invention relates to electroplating technology field, particularly relate to a kind of transition layer electroplating bath solution of the high strength alumin ium alloy for die casting.
Background technology
In various metal production, the aluminium output of China is only second to iron and steel, and China is again the big producing country of electrolytic aluminum in the world.It is high that Aluminum-aluminum alloy has specific tenacity, heat conduction, good conductivity, and the advantage such as plasticity-and easy-formation, is widely used in every profession and trade.Along with the rise in price of market copper, zinc metal, the product profit that hardware industry is former is base material with zinc, copper has reduced much, and the price increase of aluminium is comparatively slow, and more because the density of Aluminum-aluminum alloy is little, (density of aluminium is 2.7g/cm
3), compared with other common metal, the material of same weight can manufacture the component of about three times more.Not only a lot of producer all replaces copper, zinc-base material at preparation aluminum alloy base material, but aluminium is amphoteric metal, is dissolved in alkali but also be dissolved in acid, its chemical property is more active, comparatively strong with the avidity of oxygen, in an atmosphere very easily at its Surface Creation layer oxide film, be a No.1 difficult problem for plating on aluminium alloy.
The application for a patent for invention that publication number is CN1844480 provides a kind of electro-plating method of alloy product, mainly comprises application and plating two steps, to the first application re-plating of aluminium alloy.The advanced technologies that this invention is electroplated after adopting first application is electroplated alloy product, eliminates polishing process before plating, adopts machining to imitate minute surface car mode and reaches appearance requirement; Only the part surface of product is electroplated, greatly reduce than the material cost of entirety plating; Coating avoids and repeatedly toasts, and greatly reduces condemnation factor; There is special paint due to during plating, powder protects, paint in bath solution and can not fade, do not need Continuous pressing device for stereo-pattern paper during application, reduce material cost; The plating qualification rate of product improves about 10%; Only need move back chromium when strip is reprocessed, then return machining turning, every product strip expense reduces greatly than entirely stepping back again to electroplate.
The application for a patent for invention that publication number is CN10348930 provides a kind of aluminum alloy electroplating method, and the method comprises the steps: 1) by aluminum alloy base material electrochemical deoiling, washing, dries up; 2) by electrochemical deoiling, washing, the aluminum alloy base material oxidation after drying up, washing, dries up; 3) will be oxidized, washing, the aluminum alloy base material activation after drying up, washing, dries up; 4) will activate, washing, the aluminum alloy base material membrane removal after drying up, washing; 5) by membrane removal, the 1st neutralization of the aluminum alloy base material after washing, washing; 6) neutralize the 1st time, the 1st the heavy zinc of the aluminum alloy base material after washing, washing, moves back zinc; 7) by the 1st heavy zinc, washing, moves back the 2nd the heavy zinc again of the aluminum alloy base material after zinc, and washing, moves back zinc; 8) by the 2nd heavy zinc, washing, moves back the 2nd neutralization of the aluminum alloy base material after zinc, washing; 9) neutralize the 2nd time, the aluminum alloy base material plating watt nickel after washing, obtains target product.Finding through practice, unstable properties between this process batch, batch there is bubble, the phenomenon of surface irregularity in what have, shows that this technique is overall unstable, causes scrap rate high, thus, and can not practical requirement.
Summary of the invention
The object of the invention is to the transition layer electroplating bath solution proposing a kind of high strength alumin ium alloy for die casting, described aluminium alloy is for improving by adjusting component on the basis of existing technology, improve Intensity Design, high strength alumin ium alloy after adopting transition layer electroplating bath solution plating of the present invention to improve can make its binding force of cladding material good, flat appearance, bubble-free phenomenon, and coating is corrosion-resistant, rub resistance, high heat conduction and heat radiation.
For reaching this object, the present invention by the following technical solutions:
A kind of transition layer electroplating bath solution of the high strength alumin ium alloy for die casting, described high strength alumin ium alloy is made up of following component by weight percentage: Zn:7-9%, Si:12-14%, Cu:6-8%, Mn:2-4%, Ti:0.8-1.2%, Re:0.3-0.5%, Mg:3-5%, Zr:1-3%, Ni:0.6-0.8%, surplus is Al and inevitable impurity; Described transition layer electroplating bath solution comprises two portions: a part is heavy zinc treatment solution, another part electronickelling treatment solution, before and after this two portions treatment solution with the use of, wherein the consisting of of heavy zinc treatment solution: sodium oxide 60-80g/L, zinc oxide 40-60g/L, Seignette salt 100-120g/L, iron(ic) chloride 3-5g/L, SODIUMNITRATE 3-5g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:160-180g/L, F
-: 0.6-0.8mol/L, boric acid 20-30g/L, (NH
4)
3c
6h
5o
7: 22-24g/L, soluble saccharin: 1-3g/L.
Preferably, wherein the consisting of of heavy zinc treatment solution: sodium oxide 65-75g/L, zinc oxide 45-55g/L, Seignette salt 105-115g/L, iron(ic) chloride 3.5-4.5g/L, SODIUMNITRATE 3.5-4.5g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:165-175g/L, F
-: 0.65-0.75mol/L, boric acid 23-27g/L, (NH
4)
3c
6h
5o
7: 22.5-23.5g/L, soluble saccharin: 1.5-2.5g/L.
Most preferably, wherein the consisting of of heavy zinc treatment solution: sodium oxide 70g/L, zinc oxide 50g/L, Seignette salt 110g/L, iron(ic) chloride 4g/L, SODIUMNITRATE 4g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:170g/L, F
-: 0.7mol/L, boric acid 25g/L, (NH
4)
3c
6h
5o
7: 23g/L, soluble saccharin: 2g/L.
Preferably, when using described transition layer electroplating bath solution process, the temperature of heavy zinc is 30-50 DEG C, and the heavy zinc time is 20-40s; Carry out 3 heavy zinc process; The treatment condition of electronickelling process are: pH value: 4.8-5.4, cathode current density: 2-4A/dm
2, temperature: 45-55 DEG C, time: 20-30min.
Adopt the aluminium alloy after transition layer plating solution of the present invention process according to product user demand, adopt on top layer common process to carry out final nickel plating, chromium or Copper treatment.
The inventive method has following beneficial effect:
1) on the basis of existing technology, the composition of aluminium alloy is adjusted, add Re (rare earth), Zr and Ni element, and have adjusted the content of all the other alloying elements, make the existing alloy for die casting of strength ratio of the aluminium alloy prepared high by more than 20%, and toughness is still good, can meet the service requirements of the parts such as the higher automobile structure of requirement of strength.
2) have adjusted the solution composition of heavy zinc process, and preferably carry out 3 process, make aluminium diecast alloy part have good key coat performance, bonding force is strong.Practice shows, through the adjustment in mentioned component, temperature, treatment time, particularly number of processes, prime coat performance is increased substantially, if heavy zinc fluid component content is not in above-mentioned scope, will cause the extreme deterioration forming index.Therefore, finding the exact extension of above-mentioned content, is a crucial inventive point place of the present invention.This is because, the composition of the heavy zinc liquid after adjustment be according to adjustment after the moiety of aluminium alloy and the adjusted design that carries out, make mutual scattering and permeating between base material and the composition of prime coat, and the reason of 3 process is also this, the sufficient diffusion layer with base material is formed for the first time after heavy zinc, after the heavy zinc of second time diffusion layer amount comparatively the first layer obviously reduce, but form good combination with the first layer, after heavy zinc, third layer does not have diffusion transition with base material substantially for the third time, but with the second layer in conjunction with tight, third layer remains good performance as the stratum basale of subsequent plating layer simultaneously.
3) in the feature according to heavy zinc processing layer, design is optimized to the plating solution of electroless nickel layer, makes electroless nickel layer can play the effect of forming a connecting link preferably, and then ensure the flat appearance of product, bubble-free phenomenon.
4) supplementary material of the present invention is with low cost, and technique is simple, easy to operate.
Embodiment
Embodiment one
A kind of transition layer electroplating bath solution of the high strength alumin ium alloy for die casting, described high strength alumin ium alloy is made up of following component by weight percentage: Zn:7%, Si:14%, Cu:6%, Mn:4%, Ti:0.8%, Re:0.5%, Mg:3%, Zr:3%, Ni:0.6%, surplus is Al and inevitable impurity; Described transition layer electroplating bath solution comprises two portions: a part is heavy zinc treatment solution, another part electronickelling treatment solution, before and after this two portions treatment solution with the use of, wherein the consisting of of heavy zinc treatment solution: sodium oxide 60g/L, zinc oxide 60g/L, Seignette salt 100g/L, iron(ic) chloride 5g/L, SODIUMNITRATE 3g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:180g/L, F
-: 0.6mol/L, boric acid 30g/L, (NH
4)
3c
6h
5o
7: 22g/L, soluble saccharin: 3g/L.
Embodiment two
A kind of transition layer electroplating bath solution of the high strength alumin ium alloy for die casting, described high strength alumin ium alloy is made up of following component by weight percentage: Zn:9%, Si:12%, Cu:8%, Mn:2%, Ti:1.2%, Re:0.3%, Mg:5%, Zr:1%, Ni:0.8%, surplus is Al and inevitable impurity; Described transition layer electroplating bath solution comprises two portions: a part is heavy zinc treatment solution, another part electronickelling treatment solution, before and after this two portions treatment solution with the use of, wherein the consisting of of heavy zinc treatment solution: sodium oxide 80g/L, zinc oxide 40g/L, Seignette salt 120g/L, iron(ic) chloride 3g/L, SODIUMNITRATE 5g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:160g/L, F
-: 0.8mol/L, boric acid 20g/L, (NH
4)
3c
6h
5o
7: 24g/L, soluble saccharin: 1g/L.
Embodiment three
A kind of transition layer electroplating bath solution of the high strength alumin ium alloy for die casting, described high strength alumin ium alloy is made up of following component by weight percentage: Zn:8%, Si:13%, Cu:7%, Mn:3%, Ti:1.0%, Re:0.4%, Mg:4%, Zr:2%, Ni:0.7%, surplus is Al and inevitable impurity; Described transition layer electroplating bath solution comprises two portions: a part is heavy zinc treatment solution, another part electronickelling treatment solution, before and after this two portions treatment solution with the use of, wherein the consisting of of heavy zinc treatment solution: sodium oxide 70g/L, zinc oxide 50g/L, Seignette salt 110g/L, iron(ic) chloride 4g/L, SODIUMNITRATE 4g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:170g/L, F
-: 0.7mol/L, boric acid 25g/L, (NH
4)
3c
6h
5o
7: 23g/L, soluble saccharin: 2g/L.
Embodiment four
A kind of transition layer electroplating bath solution of the high strength alumin ium alloy for die casting, described high strength alumin ium alloy is made up of following component by weight percentage: Zn:7.5%, Si:13.5%, Cu:6.5%, Mn:3.5%, Ti:1.1%, Re:0.35%, Mg:4.5%, Zr:2.5%, Ni:0.65%, surplus is Al and inevitable impurity; Described transition layer electroplating bath solution comprises two portions: a part is heavy zinc treatment solution, another part electronickelling treatment solution, before and after this two portions treatment solution with the use of, wherein the consisting of of heavy zinc treatment solution: sodium oxide 65g/L, zinc oxide 55g/L, Seignette salt 105g/L, iron(ic) chloride 4.5g/L, SODIUMNITRATE 3.5g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:175g/L, F
-: 0.65mol/L, boric acid 27g/L, (NH
4)
3c
6h
5o
7: 22.5g/L, soluble saccharin: 2.5g/L.
Embodiment five
A kind of transition layer electroplating bath solution of the high strength alumin ium alloy for die casting, described high strength alumin ium alloy is made up of following component by weight percentage: Zn:8.5%, Si:12.5%, Cu:7.5%, Mn:2.5%, Ti:0.9%, Re:0.45%, Mg:3.5%, Zr:1.5%, Ni:0.75%, surplus is Al and inevitable impurity; Described transition layer electroplating bath solution comprises two portions: a part is heavy zinc treatment solution, another part electronickelling treatment solution, before and after this two portions treatment solution with the use of, wherein the consisting of of heavy zinc treatment solution: sodium oxide 75g/L, zinc oxide 45g/L, Seignette salt 115g/L, iron(ic) chloride 3.5g/L, SODIUMNITRATE 4.5g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:165g/L, F
-: 0.75mol/L, boric acid 23g/L, (NH
4)
3c
6h
5o
7: 23.5g/L, soluble saccharin: 1.5g/L.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of ancillary component, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (3)
1. the transition layer electroplating bath solution for the high strength alumin ium alloy of die casting, it is characterized in that, described high strength alumin ium alloy is made up of following component by weight percentage: Zn:7-9%, Si:12-14%, Cu:6-8%, Mn:2-4%, Ti:0.8-1.2%, Re:0.3-0.5%, Mg:3-5%, Zr:1-3%, Ni:0.6-0.8%, surplus is Al and inevitable impurity; Described transition layer electroplating bath solution comprises two portions: a part is heavy zinc treatment solution, another part electronickelling treatment solution, before and after this two portions treatment solution with the use of, wherein the consisting of of heavy zinc treatment solution: sodium oxide 60-80g/L, zinc oxide 40-60g/L, Seignette salt 100-120g/L, iron(ic) chloride 3-5g/L, SODIUMNITRATE 3-5g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:160-180g/L, F
-: 0.6-0.8mol/L, boric acid 20-30g/L, (NH
4)
3c
6h
5o
7: 22-24g/L, soluble saccharin: 1-3g/L.
2. the transition layer electroplating bath solution of a kind of high strength alumin ium alloy for die casting as claimed in claim 1, it is characterized in that, wherein the consisting of of heavy zinc treatment solution: sodium oxide 65-75g/L, zinc oxide 45-55g/L, Seignette salt 105-115g/L, iron(ic) chloride 3.5-4.5g/L, SODIUMNITRATE 3.5-4.5g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:165-175g/L, F
-: 0.65-0.75mol/L, boric acid 23-27g/L, (NH
4)
3c
6h
5o
7: 22.5-23.5g/L, soluble saccharin: 1.5-2.5g/L.
3. the transition layer electroplating bath solution of a kind of high strength alumin ium alloy for die casting as described in claim 1-2, is characterized in that, wherein the consisting of of heavy zinc treatment solution: sodium oxide 70g/L, zinc oxide 50g/L, Seignette salt 110g/L, iron(ic) chloride 4g/L, SODIUMNITRATE 4g/L; The plating solution of electronickelling consists of: NiSO
46H
2o:170g/L, F
-: 0.7mol/L, boric acid 25g/L, (NH
4)
3c
6h
5o
7: 23g/L, soluble saccharin: 2g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610051926.2A CN105568079A (en) | 2016-01-25 | 2016-01-25 | Transition layer electroplating liquid for die-cast high-strength aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610051926.2A CN105568079A (en) | 2016-01-25 | 2016-01-25 | Transition layer electroplating liquid for die-cast high-strength aluminum alloy |
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| Publication Number | Publication Date |
|---|---|
| CN105568079A true CN105568079A (en) | 2016-05-11 |
Family
ID=55878691
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610051926.2A Pending CN105568079A (en) | 2016-01-25 | 2016-01-25 | Transition layer electroplating liquid for die-cast high-strength aluminum alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886862A (en) * | 2016-06-07 | 2016-08-24 | 太仓市纯杰金属制品有限公司 | Anti-corrosion aluminum-zinc alloy material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348930A (en) * | 2008-09-10 | 2009-01-21 | 童芬德 | Electroplating method of aluminum alloy |
| CN102383116A (en) * | 2011-11-02 | 2012-03-21 | 沈阳飞机工业（集团）有限公司 | Process method for treating zinc immersion before performing copper plating on surface of superfine aluminum wire |
| 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 |
-
2016
- 2016-01-25 CN CN201610051926.2A patent/CN105568079A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348930A (en) * | 2008-09-10 | 2009-01-21 | 童芬德 | Electroplating method of aluminum alloy |
| CN102383116A (en) * | 2011-11-02 | 2012-03-21 | 沈阳飞机工业（集团）有限公司 | Process method for treating zinc immersion before performing copper plating on surface of superfine aluminum wire |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886862A (en) * | 2016-06-07 | 2016-08-24 | 太仓市纯杰金属制品有限公司 | Anti-corrosion aluminum-zinc alloy material |
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Application publication date: 20160511 |