CN105671377B - A kind of electro-plating method of high strength alumin ium alloy for die casting - Google Patents
A kind of electro-plating method of high strength alumin ium alloy for die casting Download PDFInfo
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- CN105671377B CN105671377B CN201610051845.2A CN201610051845A CN105671377B CN 105671377 B CN105671377 B CN 105671377B CN 201610051845 A CN201610051845 A CN 201610051845A CN 105671377 B CN105671377 B CN 105671377B
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- heavy zinc
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Classifications
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- 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
- 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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
-
- 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
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
Abstract
The invention discloses a kind of electro-plating method of the high strength alumin ium alloy for die casting, it is characterised in that the high strength alumin ium alloy is made 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；The electro-plating method includes：1) pre-treatment：2) zinc that sinks is handled：The composition of the treatment fluid of heavy zinc processing is：60 80g/L of sodium hydroxide, 40 60g/L of zinc oxide, 100 120g/L of sodium potassium tartrate tetrahydrate, 3 5g/L of iron chloride, 3 5g/L of sodium nitrate：The temperature of heavy zinc is 30 50 DEG C, and the heavy zinc time is 20 40s；Carry out 3 heavy zinc processing；3) electronickelling is handled：The plating solution of electronickelling forms and treatment conditions are respectively：NiSO4·6H2O：160 180g/L, F‑：0.6 0.8mol/L, boric acid 20 30g/L, (NH4)3C6H5O7：22 24g/L, saccharin sodium：1 3g/L, pH value：4.8 5.4, cathode-current density：2‑4A/dm2, temperature：45 55 DEG C, the time：20‑30min；4) top layer nickel plating, chromium or copper.
Description
Technical field
The present invention relates to the electro-plating method of electroplating technology, more particularly to a kind of high strength alumin ium alloy for die casting.
Background technology
In various metal productions, the aluminium yield in China is only second to steel, and China is that the production of electrolytic aluminium in the world is big again
State.Aluminium and its alloy have that specific strength is high, heat conduction, good conductivity, and plasticity and it is easily molded the advantages that, be widely used to
Every profession and trade.With the rise in price of market copper, zinc metal, product profit of the hardware industry original using zinc, copper as base material has been much less, and
The rise in price of aluminium is slower, and more since the density of aluminium and its alloy is small, (density of aluminium is 2.7g/cm3), with other common gold
Symbolic animal of the birth year ratio, the material of same weight can manufacture the parts of about three times more.Many producers are all replaced in preparation with aluminum alloy base material
Copper, zinc-base material, but aluminium is amphoteric metal, that is, is dissolved in alkali and is dissolved in acid again, its chemical property is more active, with the affinity of oxygen compared with
By force, it is the No.1 problem of plating on aluminium alloy in an atmosphere easily in its Surface Creation layer oxide film.
The application for a patent for invention of Publication No. CN1844480 provides a kind of electro-plating method of alloy product, mainly includes
Two steps of application and plating, to the application re-plating of aluminium alloy elder generation.The invention is using the advanced technologies electroplated after first application to aluminium
Alloy product is electroplated, and polishing process is eliminated before plating, reaches appearance requirement using the imitative minute surface car mode of machining；It is only right
The part surface plating of product, the cost of raw material than integrally electroplating substantially reduce；Coating avoids multiple baking, substantially reduces
Scrappage；Due to having special paint, powder to protect during plating, being painted in bath solution to fade, during application not
Continuous pressing device for stereo-pattern paper is needed, reduces the cost of raw material；The plating qualification rate of product improves 10% or so；Only needed when strip is reprocessed
Chromium is moved back, then returns machining turning, every product strip expense is substantially reduced than stepping back plating again entirely.
The application for a patent for invention of Publication No. CN10348930 provides a kind of aluminum alloy electroplating method, and this method includes following
Step：1) by aluminum alloy base material electrochemical deoiling, wash, drying；2) by electrochemical deoiling, washing, the aluminum alloy base material oxygen after drying
Change, wash, drying；3) will aoxidize, washing, the aluminum alloy base material activation after drying, is washed, drying；4) will activate, washing, blows
Aluminum alloy base material membrane removal after dry, washing；5) by membrane removal, the 1st neutralization of aluminum alloy base material after washing, washing；6) by the 1st time
Neutralize, the 1st heavy zinc of aluminum alloy base material after washing, washing, moves back zinc；7) by the 1st heavy zinc, washing, moves back the aluminium alloy after zinc
Base material the 2nd heavy zinc again, washing, moves back zinc；8) by the 2nd heavy zinc, washing, moves back the 2nd neutralization of the aluminum alloy base material after zinc, water
Wash；9) by the 2nd neutralization, the aluminum alloy base material plating watt nickel after washing, up to target product.Found through practice, the technique batch
A performance of taking second place is unstable, and bubble occur in some batches, and the phenomenon of surface irregularity, shows that the technique is integrally unstable, cause
High rejection rate, thus, it is impossible to meet actual demand.
The content of the invention
It is an object of the invention to propose a kind of electro-plating method of the high strength alumin ium alloy for die casting, the aluminium alloy be
Improved on the basis of the prior art by adjusting component, improve Intensity Design, the electro-plating method enables to
The binding force of cladding material of improved high strength alumin ium alloy is good, flat appearance, bubble-free phenomenon, and process stabilizing, indifference between batch
It is different.
For this purpose, the present invention uses following technical scheme：
A kind of electro-plating method of high strength alumin ium alloy for die casting, the high strength alumin ium alloy is by weight percentage by following
Component forms：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 are Al and inevitable impurity：The electro-plating method includes：
1) pre-treatment：Using conventional method to pack alloy part carry out electrochemical deoiling, oxidation, activation, except film process, mistake
It is washed with water and dries up between journey；
2) zinc that sinks is handled：The composition of the treatment fluid of heavy zinc processing is：Sodium hydroxide 60-80g/L, zinc oxide 40-60g/L,
Sodium potassium tartrate tetrahydrate 100-120g/L, iron chloride 3-5g/L, sodium nitrate 3-5g/L；The temperature of heavy zinc is 30-50 DEG C, and the heavy zinc time is
20-40s；Carry out 3 heavy zinc processing；
3) electronickelling is handled：The plating solution of electronickelling forms and treatment conditions are respectively：NiSO4·6H2O：160-180g/L,
F-：0.6-0.8mol/L, boric acid 20-30g/L, (NH4)3C6H5O7：22-24g/L, saccharin sodium：1-3g/L, pH value：4.8-5.4
Cathode-current density：2-4A/dm2, temperature：45-55 DEG C, the time：20-30min；
4) top layer nickel plating, chromium or copper：According to product use demand, nickel plating, chromium or Copper treatment are carried out using common process.
The method of the present invention has the advantages that：
1) on the basis of existing technology, the component of aluminium alloy is adjusted, adds Re (rare earth), Zr and Ni members
Element, and have adjusted the content of remaining alloying element so that the existing diecasting alloys of intensity ratio of the aluminium alloy of preparation are high by more than 20%,
And toughness is still good, it can meet the requirement of the parts such as the automobile structure of intensity requirement higher.
2) solution composition of heavy zinc processing, and treatment conditions are have adjusted, and carry out 3 processing so that pack alloy
Part has good binder course performance, strong with reference to power.Practice have shown that by mentioned component, temperature, processing time, particularly locate
Manage the adjustment of number so that prime coat performance increases substantially, if heavy zinc liquid constituent content not within the above range, will cause shape
Extreme into index deteriorates.Therefore, the exact extension of above-mentioned content is found, is the crucial inventive point place of the present invention.
This is because the composition of the heavy zinc liquid after adjustment is the adjusted design carried out according to the constituent of the aluminium alloy after adjustment,
So that mutual scattering and permeating between base material and the component of prime coat, and this is lain also in the reason for 3 processing, shape after first time heavy zinc
Into the sufficient diffusion layer with base material, diffusion layer amount is significantly reduced compared with first layer after second of heavy zinc, but is formed with first layer good
Good to combine, third layer does not have a diffusion transition with base material substantially after the heavy zinc of third time, but is tightly combined with the second layer, while the 3rd
Layer remains good performance as the basalis of subsequent plating layer.
3) according to the characteristics of heavy zinc process layer, design is optimized to the plating solution of electroless nickel layer so that electroless nickel layer
It can preferably play the role of forming a connecting link, and then ensure the flat appearance of product, bubble-free phenomenon.
4) through practice test, technology stability of the invention is good, quality indifference between batch, and product qualification rate is high.
5) supplementary material of the invention is of low cost, and technique is simple, easy to operate.
Embodiment
Embodiment one
A kind of electro-plating method of high strength alumin ium alloy for die casting, the high strength alumin ium alloy is by weight percentage by following
Component forms：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；The electro-plating method includes：
1) pre-treatment：Using conventional method to pack alloy part carry out electrochemical deoiling, oxidation, activation, except film process, mistake
It is washed with water and dries up between journey；
2) zinc that sinks is handled：The composition of the treatment fluid of heavy zinc processing is：Sodium hydroxide 60g/L, zinc oxide 60g/L, tartaric acid
Potassium sodium 100g/L, iron chloride 5g/L, sodium nitrate 3g/L；The temperature of heavy zinc is 50 DEG C, and the heavy zinc time is 20s；Carry out at 3 heavy zinc
Reason；
3) electronickelling is handled：The plating solution of electronickelling forms and treatment conditions are respectively：NiSO4·6H2O：180g/L, F-：
0.8mol/L, boric acid 20g/L, (NH4)3C6H5O7：24g/L, saccharin sodium：1g/L, pH value：5.4, cathode-current density：2A/dm2,
Temperature：55 DEG C, the time：20min；
4) top layer nickel plating, chromium or copper：According to product use demand, nickel plating, chromium or Copper treatment are carried out using common process.
Embodiment two
A kind of electro-plating method of high strength alumin ium alloy for die casting, the high strength alumin ium alloy is by weight percentage by following
Component forms：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；The electro-plating method includes：
1) pre-treatment：Using conventional method to pack alloy part carry out electrochemical deoiling, oxidation, activation, except film process, mistake
It is washed with water and dries up between journey；
2) zinc that sinks is handled：The composition of the treatment fluid of heavy zinc processing is：Sodium hydroxide 80g/L, zinc oxide 40g/L, tartaric acid
Potassium sodium 120g/L, iron chloride 3g/L, sodium nitrate 5g/L；The temperature of heavy zinc is 30 DEG C, and the heavy zinc time is 40s；Carry out at 3 heavy zinc
Reason；
3) electronickelling is handled：The plating solution of electronickelling forms and treatment conditions are respectively：NiSO4·6H2O：180g/L, F-：
0.6mol/L, boric acid 30g/L, (NH4)3C6H5O7：22g/L, saccharin sodium：3g/L, pH value：4.8, cathode-current density：4A/dm2,
Temperature：45 DEG C, the time：30min；
4) top layer nickel plating, chromium or copper：According to product use demand, nickel plating, chromium or Copper treatment are carried out using common process.
Embodiment three
A kind of electro-plating method of high strength alumin ium alloy for die casting, the high strength alumin ium alloy is by weight percentage by following
Component forms：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；The electro-plating method includes：
1) pre-treatment：Using conventional method to pack alloy part carry out electrochemical deoiling, oxidation, activation, except film process, mistake
It is washed with water and dries up between journey；
2) zinc that sinks is handled：The composition of the treatment fluid of heavy zinc processing is：Sodium hydroxide 70g/L, zinc oxide 50g/L, tartaric acid
Potassium sodium 110g/L, iron chloride 4g/L, sodium nitrate 4g/L；The temperature of heavy zinc is 40 DEG C, and the heavy zinc time is 30s；Carry out at 3 heavy zinc
Reason；
3) electronickelling is handled：The plating solution of electronickelling forms and treatment conditions are respectively：NiSO4·6H2O：170g/L, F-：
0.7mol/L, boric acid 25g/L, (NH4)3C6H5O7：23g/L, saccharin sodium：2g/L, pH value：5.1, cathode-current density：3A/dm2,
Temperature：50 DEG C, the time：25min；
4) top layer nickel plating, chromium or copper：According to product use demand, nickel plating, chromium or Copper treatment are carried out using common process.
Applicant states that the present invention illustrates the detailed process equipment of the present invention and technological process by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, it is above-mentioned detailed not mean that the present invention has to rely on
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, selection of concrete mode etc., all fall within the present invention's
Within protection domain and the open scope.
Claims (1)
1. a kind of electro-plating method of high strength alumin ium alloy for die casting, the high strength alumin ium alloy is by weight percentage by following group
It is grouped into：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；The electro-plating method includes：
1) pre-treatment：Pack alloy part is carried out using conventional method electrochemical deoiling, oxidation, activation, except film process, process it
Between be washed with water and dry up；
2) zinc that sinks is handled：The composition of the treatment fluid of heavy zinc processing is：Sodium hydroxide 70g/L, zinc oxide 50g/L, sodium potassium tartrate tetrahydrate
110g/L, iron chloride 4g/L, sodium nitrate 4g/L；The temperature of heavy zinc is 40 DEG C, and the heavy zinc time is 30s；Carry out 3 heavy zinc processing；
3) electronickelling is handled：The plating solution of electronickelling forms and treatment conditions are respectively：NiSO4·6H2O：170g/L, F-：
0.7mol/L, boric acid 25g/L, (NH4)3C6H5O7：23g/L, saccharin sodium：2g/L, pH value：5.1, cathode-current density：3A/dm2,
Temperature：50 DEG C, the time：25min；
4) top layer nickel plating, chromium or copper：According to product use demand, nickel plating, chromium or Copper treatment are carried out using common process.
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| CN105671377B true CN105671377B (en) | 2018-05-04 |
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| CN106435676B (en) * | 2016-11-25 | 2019-02-26 | 捷开通讯(深圳)有限公司 | The surface treatment method of electronic equipment metal shell |
| CN108505077A (en) * | 2018-05-14 | 2018-09-07 | Oppo广东移动通信有限公司 | The surface treatment method of Al-alloy parts, the shell of electronic equipment and electronic equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104264020A (en) * | 2014-10-17 | 2015-01-07 | 苏州凯宥电子科技有限公司 | High-strength die casting aluminum alloy and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104264020A (en) * | 2014-10-17 | 2015-01-07 | 苏州凯宥电子科技有限公司 | High-strength die casting aluminum alloy and preparation method thereof |
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Inventor after: Zhou Huixiang Inventor before: Zhang Ying |
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Effective date of registration: 20180409 Address after: 528000 Guangdong Province, Foshan City Industrial Park Sanshui Lubao Park D District No. 34 (F1) was one of the Applicant after: Foshan Sanshui Rui Sheng metal products Co., Ltd. Address before: Linxi in Hebei province Tangshan City Guye District 063100 West Building 2 Building 2 No. 9 Applicant before: Zhang Ying |
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Address after: 528139 No. 34 (F1), District D, lubaoyuan, Sanshui Industrial Park, Foshan City, Guangdong Province Patentee after: Ruishengtong metal (Guangdong) Co.,Ltd. Address before: 528000 No. 34 (F1), District D, lubaoyuan, Sanshui Industrial Park, Foshan City, Guangdong Province Patentee before: Foshan Sanshui Rui Sheng metal products Co.,Ltd. |