CN104233420A - Method for directly electroplating high-binding-force nickel layer on surface of aluminum or aluminum alloy - Google Patents

Method for directly electroplating high-binding-force nickel layer on surface of aluminum or aluminum alloy Download PDF

Info

Publication number
CN104233420A
CN104233420A CN201310239385.2A CN201310239385A CN104233420A CN 104233420 A CN104233420 A CN 104233420A CN 201310239385 A CN201310239385 A CN 201310239385A CN 104233420 A CN104233420 A CN 104233420A
Authority
CN
China
Prior art keywords
aluminum
aluminum alloy
nickel
plating
activation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310239385.2A
Other languages
Chinese (zh)
Inventor
华兆红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUXI SENXIN PRECISION MACHINERY FACTORY
Original Assignee
WUXI SENXIN PRECISION MACHINERY FACTORY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WUXI SENXIN PRECISION MACHINERY FACTORY filed Critical WUXI SENXIN PRECISION MACHINERY FACTORY
Priority to CN201310239385.2A priority Critical patent/CN104233420A/en
Publication of CN104233420A publication Critical patent/CN104233420A/en
Pending legal-status Critical Current

Links

Abstract

The invention relates to a method for directly electroplating a high-binding-force nickel layer on the surface of aluminum or aluminum alloy. The method is characterized by comprising the following steps: performing chemical polishing to the aluminum or aluminum alloy and then placing in an electroplating solution, wherein an aluminum alloy material is not required for special pretreatment before electroplating; adding a complexing film remover into the electroplating solution, firstly performing anode activation by adopting a nickel plating solution so as to perform corrosion activation to the surface of the aluminum alloy, and then instantly turning to conduct direct cathode nickel plating, to form the thin nickel plating layer with excellent binding force, wherein for the anode activation and direct cathode nickel plating processes, the parameters of the anode activation process are as follows: current density is 1.2-1.5A/dm<2>, and time is 100s; the parameters of the direct cathode nickel plating process are as follows: current density is 1.6-2.8A/dm<2>, time is 10min, pH value is 3.5-4.5, and temperature is 15-30DEG C. The plated layer is uniform and compact, and the plated layer has excellent binding force with the aluminum substrate. The method overcomes the defects that the traditional aluminum and aluminum alloy electroplating steps are complicated, the quality of products is difficult to control, the plated layer has poor binding force, and the like, therefore, the method is an aluminum and aluminum alloy surface treatment method which is simple and convenient to operate, and can meet the high-quality surface treatment and performance requirements of the aluminum and aluminum alloy products.

Description

A kind of aluminum or aluminum alloy directly electroplating on surface high-bond nickel dam method
Technical field
The present invention relates to a kind of method at Al and Alalloy Direct Electroplating nickel high-bond nickel dam on the surface.Specifically, Al and Alalloy electro-nickel process of the present invention, can directly be electroplated without the need to carrying out special pre-treatment in the plating solution to aluminum alloy materials, obtains coating.
Background technology
Aluminum-aluminum alloy is one of most widely used metal, has good conductivity, heat transfer is fast, light specific gravity, specific tenacity are high, is easy to the feature such as shaping.But Aluminum-aluminum alloy exist again hardness low, not wear-resisting, easily there is the shortcomings such as intergranular corrosion, not easily welding, affect its range of application and work-ing life.Aluminum-aluminum alloy can give protection-decoration and other functionalized use after plating, can increase the service life and broadened application scope.
On Aluminum-aluminum alloy, plating is more much more difficult than other metal is electroplated, mainly owing to easily there is peeling and decortication between coating and matrix, the phenomenons such as bonding force is bad.Tracing it to its cause is that the avidity of 1. aluminium and oxygen is very strong, so total surface has oxide film, and the electroconductibility of oxide film is bad, has a strong impact on the combination of coating and matrix; 2. aluminium is very active, in plating, easily replacement(metathesis)reaction occurs, and the bonding force of the displacement layer that this reaction produces and matrix is very poor; 3. the coefficient of expansion of aluminium is large compared with the metal such as nickel, copper; 4. hydrogen occlusion is often had, easy bubbling between aluminium base and coating.For above-mentioned reasons, on Al and Alalloy, Direct Electroplating becomes very difficult.
At present, Al and Alalloy plating is main adopts special pre-treating process, comprises the electroplating process such as secondary soaking zinc, chemical nickel plating, anodic oxidation.Although aforesaid method is really helpful to raising binding force of cladding material, pretreatment process complex steps, quality product is wayward, and production cost is higher.In these methods, anonizing is mainly undertaken combining by mechanical snap effect due to the coating that obtains, and its bonding force is subject to certain restrictions, and cost is higher simultaneously, so application is few; Chemically coated nickel method pre-treatment step is loaded down with trivial details, and quality product is wayward, and cost is higher, so application is wideless yet; Secondary soaking zinc method Application comparison is general, and its electroplating technology flow process is: oil removing → washing → etch → washing → bright dipping → washing → leaching zinc → washing → move back zinc → washing → second time soaks zinc → washing → plating.Still there is obvious deficiency in this technique: one is complex steps, is unfavorable for that actual production operates; Two is different for composition, structure is different aluminium alloys, and the bonding force of the coating obtained often differs greatly; Three is no matter which kind of aluminium alloy, the coating adopting this technique to obtain and the bonding force of substrate all not too high, range of application is restricted.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is a kind of method providing aluminum or aluminum alloy directly electroplating on surface high-bond nickel dam.Compared with the shortcomings such as described method and complex steps in existing aluminium alloy electric coating technology, binding force of cladding material is poor, production cost is higher, the method is without the need to special pre-treatment, and step is simple, and binding force of cladding material is good, and cost is lower.
Method of the present invention comprises step specific as follows:
1) pre-treatment: comprise pre-grinding sample → electrochemical deoiling → chemical rightenning → ash disposal → activation;
2) anode activation and the direct nickel plating of negative electrode: first adopt nickel-plating liquid to carry out anode activation to aluminum alloy surface activating, turn to instantaneously subsequently and carry out the direct nickel plating of negative electrode, form the flash plating nickel dam that one deck bonding force is good.
Described pre-treatment object is grease in order to remove workpiece surface and oxide film.
Described pre-grinding sample can adopt sandblasting and sand paper grinding to carry out.
Described electrochemical deoiling adopts grease and the dirt of alkali electroless oil removing removing aluminum alloy surface, processing condition are: sodium carbonate 10-20g/L, sodium phosphate 10-20g/L, water glass 10-20g/L, OP-10 emulsifying agent 1-3g/L, temperature 60-80 DEG C of time is to oil removing to the greatest extent.
Described chemical polishing, except adopting following basic chemical polishing liquid described in the invention, also can adopt other acidic chemical polishing treatment solutions to carry out polished finish, equally also can reach good polishing effect.Chemical brightening solution of the present invention adopts following formula: NaOH100 ~ 400g/L; NaNO 3200 ~ 550g/L; CoSO 41 ~ 20g/L; 75 ~ 95 DEG C; 1 ~ 5min.
Surperficial dust after described ash disposal adopts the nitric acid of volume fraction 50% to remove polishing.
Described activation adopts the dilute sulphuric acid activation of massfraction 5%, keeps aluminium alloy active surface.
The plating solution of described anode activation and the direct nickel plating of negative electrode consists of:
Main salt is one or both in single nickel salt, nickelous chloride, and concentration is 60 ~ 120g/L.
Conducting salt is one or both in nickelous chloride, sodium-chlor, and its concentration is 30 ~ 50g/L.
Buffer reagent is boric acid, 20 ~ 30g/L.
Complexing except film can be one or composite in Sodium Fluoride, ammonium bifluoride, Trisodium Citrate, Tripotassium Citrate, sodium tartrate, Seignette salt, disodium ethylene diamine tetraacetate, Sunmorl N 60S.Complexing removes film total concn and controls at 20 ~ 40g/L.
The technique of described anode activation and the direct nickel plating of negative electrode is: anode activation processing parameter: current density is 1.2-1.5A/dm2, and the time is 100s; Negative electrode electroplating technological parameter: current density 1.6-2.8A/dm2, time 10min, pH value 3.5-4.5, temperature is 15-30 DEG C.Employing pressurized air stirs, and anode is the sheet nickel of 99.99%.
Power supply wave shape adopts permanent direct current, and after electroplating parts puts into tank liquor, workpiece is connected with positive source, and the complexing in plating solution removes film and chlorion is fully adsorbed in surface, and for some time rear surface is corroded completely, presents high activity surface.Then change-over circuit, instantaneously workpiece is set to negative electrode and is in plating process, turn to and complete instantaneously, aluminium workpiece surface is not oxidized, ensure that the good combination power after plating.
Technique tool of the present invention has the following advantages:
1. Direct Electroplating nickel method of the present invention, without the pre-treatment step that leaching zinc, anodic oxidation, electroless plating etc. are complicated, technological operation is simple, and quality product is easy to control.Because processing step of the present invention can farthest be simplified, required energy consumption also can drop to minimum.
2. Direct Electroplating nickel method of the present invention, the complexing added in plating solution is except film, effectively can remove the oxide thin layer film being present in aluminum alloy surface, substantially increase the bonding force of coating and matrix, solve Al and Alalloy coating and basal body binding force difference and problem such as the coating peeling that causes and bubbling in electroplating process.
3. adopt the nickel layer that the present invention obtains, thicknesses of layers is even, and strong with basal body binding force, solidity to corrosion is good.
4. Direct Electroplating nickel method of the present invention, the features such as it is low that its electrolytic solution has solution total concn, long service life, and yield rate is high, and energy consumption is low.
5. raw material of the present invention is easy to get, and cost is low, is easy to suitability for industrialized production.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art should understand, described embodiment is only help to understand the present invention, should not be considered as concrete restriction of the present invention.
Embodiment one
Direct Electroplating nickel on fine aluminium
Sample adopts L3 commercial-purity aluminium, and concrete steps are as follows:
1. pre-treatment.
Sandblasting and sand paper grinding is adopted to carry out pre-grinding sample.Washing.
Adopt grease and the dirt of alkali electroless oil removing removing aluminum alloy surface, processing condition are: sodium carbonate 10-20g/L, sodium phosphate 10-20g/L, water glass 10-20g/L, OP-10 emulsifying agent 1-3g/L, and temperature 60-80 DEG C of time is to oil removing to the greatest extent.Washing.
Adopt NaOH250g/L, NaNO 3460g/L, CoSO 4the chemical brightening solution of 1g/L composition carries out chemical rightenning to sample.Temperature 80 ~ 95 DEG C, time 2min; Washing.
Surperficial dust after adopting the nitric acid of volume fraction 50% to remove polishing.Washing.
Adopt the dilute sulphuric acid activation of massfraction 5%, keep aluminium alloy active surface.Washing
2. anode activation and the direct nickel plating of negative electrode: first adopt nickel-plating liquid to carry out anode activation to aluminum alloy surface activating, turn to instantaneously subsequently and carry out the direct nickel plating of negative electrode, form the flash plating nickel dam that one deck bonding force is good, this coating can be used as the bottom of follow-up plating.Electroplate liquid consists of: NiSO 460g/L; Boric acid 25g/L; NaCl50g/L; Trisodium Citrate 5g/L; NaF5g/L; Seignette salt 10g/L; PH value 4.5.Anode activation processing parameter: current density is 1.2A/dm2, the time is 100s; Negative electrode electroplating technological parameter: current density 1.6A/dm2, time 10min, pH value 3.5, temperature is 15 DEG C.Employing pressurized air stirs, and anode is the sheet nickel of 99.99%.
Quality of coating: even, smooth, fine and close; Thickness of coating 15 μm.
Sample bonding force adopts following methods to detect:
(1) on sample, draw the parallel to each other and staggered cut (forming the grid of 1mm × 1mm) deeply reaching substrate with steel knife point, then use wire brush friction surface, have no coating peeling obscission;
(2) clamp sample one end bending five times back and forth with pincer pliers, until print fractures, fracture both sides coating is combined closely with substrate, has no peeling obscission;
(3) adopt thermal cycling test, plating piece is incubated 1 hour under 220 DEG C of conditions, after taking-up in cold water chilling, round-robin test 60 times, has no coating peeling obscission.
Detected result shows: binding force of cladding material is good.
Embodiment two
Direct Electroplating nickel on duralumin
Sample adopts LY-12 duralumin, and concrete steps are as follows:
1. mechanical pretreatment: adopt sandblasting or sand paper grinding, except deburring, firmly oxide compound, extruding with lubricator, cut wet goods foreign matter, reduce surfaceness; Washing;
2. adopt grease and the dirt of alkali electroless oil removing removing aluminum alloy surface, processing condition are: sodium carbonate 10-20g/L, sodium phosphate 10-20g/L, water glass 10-20g/L, OP-10 emulsifying agent 1-3g/L, and temperature 60-80 DEG C of time is to oil removing to the greatest extent.Washing.
3. chemical rightenning: adopt NaOH300g/L, NaNO 3500g/L, CoSO 4the chemical brightening solution of 2g/L composition carries out chemical rightenning to sample.Temperature 80 ~ 95 DEG C, time 3min; Washing;
4. the surperficial dust after adopting the nitric acid of volume fraction 50% to remove polishing.Washing.
5. adopt the dilute sulphuric acid activation of massfraction 5%, keep aluminium alloy active surface.Washing.
6. anode activation and the direct nickel plating of negative electrode: first adopt nickel-plating liquid to carry out anode activation to aluminum alloy surface activating, turn to instantaneously subsequently and carry out the direct nickel plating of negative electrode, form the flash plating nickel dam that one deck bonding force is good, this coating can be used as the bottom of follow-up plating.Electroplate liquid consists of: NiSO 470g/L; NiCl 250g/L; Boric acid 20g/L; Disodium ethylene diamine tetraacetate 10g/L; Ammonium bifluoride 5g/L; Sodium tartrate 10g/L; PH value 4.0.Anode activation processing parameter: current density is 1.3A/dm2, the time is 100s; Negative electrode electroplating technological parameter: current density 2A/dm2, time 10min, pH value 4, temperature is 20 DEG C.Employing pressurized air stirs, and anode is the sheet nickel of 99.99%.
Quality of coating: even, smooth, fine and close; Thickness of coating 16 μm.
Sample bonding force adopts following methods to detect:
(1) on sample, draw the parallel to each other and staggered cut (forming the grid of 1mm × 1mm) deeply reaching substrate with steel knife point, then use wire brush friction surface, have no coating peeling obscission;
(2) adopt thermal cycling test, plating piece is incubated 1 hour under 300 DEG C of conditions, after taking-up in cold water chilling, round-robin test 60 times, has no coating peeling obscission;
Detected result shows: binding force of cladding material is good.
Embodiment three
Direct Electroplating nickel on cast aluminium alloy
Sample adopts ZL-108 cast aluminium alloy, and concrete steps are as follows:
1. mechanical pretreatment: adopt sandblasting and sand paper grinding, except deburring, firmly oxide compound, extruding with lubricator, cut wet goods foreign matter, reduce surfaceness; Washing;
2. adopt grease and the dirt of alkali electroless oil removing removing aluminum alloy surface, processing condition are: sodium carbonate 10-20g/L, sodium phosphate 10-20g/L, water glass 10-20g/L, OP-10 emulsifying agent 1-3g/L, and temperature 60-80 DEG C of time is to oil removing to the greatest extent.Washing.
3. chemical rightenning: adopt NaOH300g/L, NaNO 3520g/L, CoSO 4the chemical brightening solution of 5g/L composition carries out chemical rightenning to sample.Temperature 80 ~ 95 DEG C, time 3min; Washing;
4. the surperficial dust after adopting the nitric acid of volume fraction 50% to remove polishing.Washing.
5. adopt the dilute sulphuric acid activation of massfraction 5%, keep aluminium alloy active surface.Washing.
6. anode activation and the direct nickel plating of negative electrode: first adopt nickel-plating liquid to carry out anode activation to aluminum alloy surface activating, turn to instantaneously subsequently and carry out the direct nickel plating of negative electrode, form the flash plating nickel dam that one deck bonding force is good, this coating can be used as the bottom of follow-up plating.Electroplate liquid consists of: NiSO 480g/L; NiCl 220g/L; Boric acid 30g/L; NaCl30g/L; Sodium Fluoride 10g/L; Sodium tartrate 15g/L; Trisodium Citrate 15g/L; PH value 3.5; Anode activation processing parameter: current density is 1.5A/dm2, the time is 100s; Negative electrode electroplating technological parameter: current density 2.8A/dm2, time 10min, pH value 4.5, temperature is 30 DEG C.Employing pressurized air stirs, and anode is the sheet nickel of 99.99%.
Quality of coating: even, smooth, fine and close; Thickness of coating 17 μm.
Sample bonding force adopts following methods to detect:
(1) on sample, draw the parallel to each other and staggered cut (forming the grid of 1mm × 1mm) deeply reaching substrate with steel knife point, then use wire brush friction surface, have no coating peeling obscission;
(2) adopt thermal cycling test, plating piece is incubated 1 hour under 300 DEG C of conditions, after taking-up in cold water chilling, round-robin test 80 times, has no coating peeling obscission.
Detected result shows: binding force of cladding material is good.
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 (9)

1. a method for aluminum or aluminum alloy directly electroplating on surface high-bond nickel dam, is characterized in that: operate as follows:
1) pre-treatment: comprise pre-grinding sample → electrochemical deoiling → chemical rightenning → ash disposal → activation;
2) anode activation and the direct nickel plating of negative electrode: first adopt nickel-plating liquid to carry out anode activation to aluminum alloy surface activating, turn to instantaneously subsequently and carry out the direct nickel plating of negative electrode, form the flash plating nickel dam that one deck bonding force is good;
The technique of described anode activation and the direct nickel plating of negative electrode is: anode activation processing parameter: current density is 1.2-1.5A/dm2, and the time is 100s; Negative electrode electroplating technological parameter: current density 1.6-2.8A/dm2, time 10min, pH value 3.5-4.5, temperature is 15-30 DEG C.Employing pressurized air stirs, and anode is the sheet nickel of 99.99%;
In described nickel-plating liquid containing complexing except film, complexing except film be one or more in Sodium Fluoride, ammonium bifluoride, Trisodium Citrate, Tripotassium Citrate, sodium tartrate, Seignette salt, disodium ethylene diamine tetraacetate, Sunmorl N 60S.
2. method according to claim 1, is characterized in that: described electroplating bath components also comprises main salt, conducting salt, buffer reagent, and solution ph controls 3.0 ~ 5.0.
3. method according to claim 1, is characterized in that: in plating solution, main salt is one or both in single nickel salt, nickelous chloride, and its concentration controls at 60 ~ 120g/L.
4. method according to claim 1, is characterized in that: in plating solution, conducting salt is one or both in nickelous chloride, sodium-chlor, and its concentration controls at 30 ~ 50g/L.
5. method according to claim 1, is characterized in that: in plating solution, buffer reagent is boric acid, and its concentration controls at 20 ~ 30g/L.
6. method according to claim 1, is characterized in that: described chemical brightening solution composition comprises: sodium hydroxide 100 ~ 400g/L, SODIUMNITRATE 200 ~ 550g/L, rose vitriol 1 ~ 20g/L; Chemical rightenning temperature controls at 70 ~ 95 DEG C, treatment time 1 ~ 5min.
7. method according to claim 1, it is characterized in that: described electrochemical deoiling adopts grease and the dirt of alkali electroless oil removing removing aluminum alloy surface, processing condition are: sodium carbonate 10-20g/L, sodium phosphate 10-20g/L, water glass 10-20g/L, OP-10 emulsifying agent 1-3g/L, temperature 60-80 DEG C of time is to oil removing to the greatest extent.
8. method according to claim 1, is characterized in that: the surperficial dust after described ash disposal adopts the nitric acid of volume fraction 50% to remove polishing.
9. method according to claim 1, is characterized in that: described activation adopts the dilute sulphuric acid activation of massfraction 5%, keeps aluminium alloy active surface.
CN201310239385.2A 2013-06-14 2013-06-14 Method for directly electroplating high-binding-force nickel layer on surface of aluminum or aluminum alloy Pending CN104233420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310239385.2A CN104233420A (en) 2013-06-14 2013-06-14 Method for directly electroplating high-binding-force nickel layer on surface of aluminum or aluminum alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310239385.2A CN104233420A (en) 2013-06-14 2013-06-14 Method for directly electroplating high-binding-force nickel layer on surface of aluminum or aluminum alloy

Publications (1)

Publication Number Publication Date
CN104233420A true CN104233420A (en) 2014-12-24

Family

ID=52222291

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310239385.2A Pending CN104233420A (en) 2013-06-14 2013-06-14 Method for directly electroplating high-binding-force nickel layer on surface of aluminum or aluminum alloy

Country Status (1)

Country Link
CN (1) CN104233420A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105112960A (en) * 2015-09-21 2015-12-02 无锡清杨机械制造有限公司 Hypophosphite system plating Ni-P alloy electroplating solution and electroplating method
CN105483784A (en) * 2015-12-30 2016-04-13 无锡透平叶片有限公司 Turbine blade and surface pretreatment method thereof
CN105603269A (en) * 2016-01-25 2016-05-25 张颖 Method for manufacturing aluminum automobile gearbox shell
CN106567108A (en) * 2016-11-09 2017-04-19 广西新六合环保有限责任公司 Aluminum material galvanization method
CN106757231A (en) * 2016-12-27 2017-05-31 武汉延锋时代检测技术服务有限公司 A kind of aluminium alloy part chrome-faced technique
CN107119296A (en) * 2017-06-27 2017-09-01 中国人民解放军第五七九工厂 A kind of method of anode activation titanium alloy electro-coppering
CN107190292A (en) * 2017-05-19 2017-09-22 深圳市长盈精密技术股份有限公司 Mobile phone shell and its surface treatment method
CN107254701A (en) * 2017-05-19 2017-10-17 深圳市长盈精密技术股份有限公司 Handset shell and its surface treatment method
CN108130572A (en) * 2017-12-04 2018-06-08 陕西航空电气有限责任公司 A kind of aluminium alloy pre-nickel plating solution
CN109252197A (en) * 2018-09-29 2019-01-22 中国人民解放军第五七九工厂 A kind of method of carburized parts electrosilvering
CN109338432A (en) * 2018-11-27 2019-02-15 东莞市慧泽凌化工科技有限公司 A kind of electroplating technology of stainless steel and aluminium alloy compound part
CN109943873A (en) * 2017-12-21 2019-06-28 李文熙 The thick film aluminium electrode of plating metal pre-treatment
CN110494597A (en) * 2017-03-31 2019-11-22 古河电气工业株式会社 Plating wire and rod and its manufacturing method and cable, electric wire, coil and the spring member formed using it
CN111020676A (en) * 2019-12-25 2020-04-17 长沙新材料产业研究院有限公司 Method for processing diamond coating hard alloy and method for processing hard alloy cutter

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105112960A (en) * 2015-09-21 2015-12-02 无锡清杨机械制造有限公司 Hypophosphite system plating Ni-P alloy electroplating solution and electroplating method
CN105483784A (en) * 2015-12-30 2016-04-13 无锡透平叶片有限公司 Turbine blade and surface pretreatment method thereof
CN105603269A (en) * 2016-01-25 2016-05-25 张颖 Method for manufacturing aluminum automobile gearbox shell
CN105603269B (en) * 2016-01-25 2018-05-15 株洲立众精制科技有限公司 A kind of manufacture method of aluminum automobile gear box casing
CN106567108A (en) * 2016-11-09 2017-04-19 广西新六合环保有限责任公司 Aluminum material galvanization method
CN106757231A (en) * 2016-12-27 2017-05-31 武汉延锋时代检测技术服务有限公司 A kind of aluminium alloy part chrome-faced technique
CN110494597A (en) * 2017-03-31 2019-11-22 古河电气工业株式会社 Plating wire and rod and its manufacturing method and cable, electric wire, coil and the spring member formed using it
CN107190292A (en) * 2017-05-19 2017-09-22 深圳市长盈精密技术股份有限公司 Mobile phone shell and its surface treatment method
CN107254701A (en) * 2017-05-19 2017-10-17 深圳市长盈精密技术股份有限公司 Handset shell and its surface treatment method
CN107119296A (en) * 2017-06-27 2017-09-01 中国人民解放军第五七九工厂 A kind of method of anode activation titanium alloy electro-coppering
CN108130572A (en) * 2017-12-04 2018-06-08 陕西航空电气有限责任公司 A kind of aluminium alloy pre-nickel plating solution
CN108130572B (en) * 2017-12-04 2020-01-14 陕西航空电气有限责任公司 Aluminum alloy nickel pre-plating solution
CN109943873A (en) * 2017-12-21 2019-06-28 李文熙 The thick film aluminium electrode of plating metal pre-treatment
CN109252197A (en) * 2018-09-29 2019-01-22 中国人民解放军第五七九工厂 A kind of method of carburized parts electrosilvering
CN109338432A (en) * 2018-11-27 2019-02-15 东莞市慧泽凌化工科技有限公司 A kind of electroplating technology of stainless steel and aluminium alloy compound part
CN111020676A (en) * 2019-12-25 2020-04-17 长沙新材料产业研究院有限公司 Method for processing diamond coating hard alloy and method for processing hard alloy cutter

Similar Documents

Publication Publication Date Title
CN104233420A (en) Method for directly electroplating high-binding-force nickel layer on surface of aluminum or aluminum alloy
CN101280445B (en) Electroplating process for surface of magnesium alloy motorcycle hub
CN100580139C (en) One-step acid washing activating plating pre-processing technique for magnesium alloy surface
Wu et al. Progress of electroplating and electroless plating on magnesium alloy
CN102605400B (en) Steel strip continuous copper plating process
CN100467675C (en) Process for directly electroplating on surface of aluminium or aluminium alloy
CN101643926B (en) Non-cyanide pre-plating copper plating solution
CN101525711A (en) Magnesium alloy with zinc and nickel compound plating layers and preparation method thereof
CN101608326B (en) Method for directly electroplating lead on surface of aluminium and aluminium alloy
CN102677116B (en) Method for dipulse preplating non-cyanide alkaline copper on ferro matrix
CN105297011A (en) Method for preparing super-hydrophobic composite film layer on surface of magnesium alloy
CN103882492A (en) Chemical plating posttreatment method of metallic matrix
CN103556194A (en) Surface treatment process for aluminum alloy
CN101397688A (en) Surface treating method of zinc alloy products
CN107313080A (en) Electroplate liquid, preparation method and the electro-plating method of neodymium iron boron product Direct Electroplating copper
CN101348930B (en) Electroplating method of aluminum alloy
CN104233416A (en) Method for electroplating zinc-nickel coating on magnesium alloy electroplate surface
CN103540970B (en) A kind of method of non-cyanide silver coating
CN107236977A (en) A kind of electroplating pretreatment process optimization method
CN103215574B (en) Magnesium-alloy chemical nickel plating solution and nickel plating process thereof
CN101311322B (en) Surface treatment process for electroplating iron-nickel alloy and electroplating solution thereof
CN106086971A (en) A kind of TC4 titanium alloy thread surface copper coating
CN107190288A (en) A kind of preparation method of HEDP copper facing imporosity thin layer
CN103806033A (en) Method of electroplating metal layer on surface of zinc pressure casting
CN104233296A (en) Method for silvering aluminum and aluminum alloy

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20141224

C02 Deemed withdrawal of patent application after publication (patent law 2001)