CN102605400A - Steel strip continuous copper plating process - Google Patents
Steel strip continuous copper plating process Download PDFInfo
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- CN102605400A CN102605400A CN2011102908756A CN201110290875A CN102605400A CN 102605400 A CN102605400 A CN 102605400A CN 2011102908756 A CN2011102908756 A CN 2011102908756A CN 201110290875 A CN201110290875 A CN 201110290875A CN 102605400 A CN102605400 A CN 102605400A
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Abstract
The invention provides a steel strip continuous copper plating process. A cyanide copper plating process is adopted for electric plating. The process mainly comprises a pre-treatment process and an electric copper plating process, wherein the pre-treatment mainly comprises chemical oil removal, electrolysis oil removal, water washing, activation, water washing and the like. The electric plating process mainly comprises copper pre-plating, main copper plating, recovery, water washing and the like. In the steel strip continuous copper plating process, each process tank adopts a sealed trapezoidal groove. For the recovery mode, an atomizing spraying mode is adopted for recovery. In the copper plating process, the electric deposition speed is accelerated through the cyclic filtering of a filtering machine, and brightening agents used in the electric plating are inorganic brightening agents using selenite as main brightening agents or other inorganic brightening agents, so the desoldering phenomenon generated in the subsequent copper plating steel strip soldering work can be avoided. The steel strips are subjected to continuous copper plating, the speed and the efficiency are high, and smooth and compact plating layers can be obtained.
Description
Technical field
The present invention relates to the technical field of alkaline copper plating, specifically is the steel band copperizing continuously.
Background technology
Along with China's industrial expansion, the especially develop rapidly of automobile and other industries increases the demand of copper and brass work day by day.But China is that a poor copper is national, and the main dependence on import of copper adds copper price moving quickly upward in the world, brings big cost pressure to industries such as China's automobiles.Through demonstration and facts have proved, at automobile, industries such as household electrical appliances, steel copper facing goods Alloy instead of Copper goods are feasible, even performance in some aspects is more better than copper on the contrary.The copper facing steel band mainly is used for producing group's enlightening pipe, and widespread usage is at aspects such as automobile oil pipe, floor heating tube, air-conditioning pipes.The still economic problems that use iron instead of copper not can also reduce carbon emission in a large number.Steel band copper facing has good social benefit and economic benefit thus.Utilize cyanide electroplating, can obtain densification, smooth, coating that bonding force is good, so the steel band copperizing continuously adopts cyanide copper plating process.
Summary of the invention
The steel band copperizing continuously mainly comprises pre-treatment process and electro-coppering process.Pre-treatment mainly comprises electrochemical deoiling, electrolytic degreasing, washing, activation, washing etc.; Electroplating process mainly comprises preplating copper, main copper facing, recovery, washing etc.In the steel band copperizing continuously, each technology groove adopts the dovetail groove of closed; Way of recycling adopts the mode of atomizing spray to reclaim.Circulating filtration through filter in the copper facing process quickens electrodeposition rate; The brightening agent that uses in the plating is with selenite inorganic brightening agent or other inorganic brightening agents as main brightener, can avoid like this connecing appearance " sealing-off " phenomenon in the work at follow-up copper plated steel tape welding.
Embodiment
Steel band copperizing continuously provided by the invention mainly comprises pre-treatment process and electro-coppering process.Described pre-treatment process comprises hot water wash, oil removing, washing and activation, water washing process.Wherein oil removal treatment adopts the mode that electrochemical deoiling and male-female utmost point associating oil removing mutually combine.
Wherein, hot water wash adopts 70～80 ℃ hot water to clean 20～30s.
Wherein, oil removal treatment comprises electrochemical deoiling and electrolytic degreasing, and electrolytic degreasing is male-female utmost point associating oil removing.At first, carry out electrochemical deoiling, the time is 1～3min, carries out electrolytic degreasing then, during electrolytic degreasing, and at first negative electrode oil removing 1min, anode oil removing 15s then.
In the described electrochemical deoiling, degreasing fluid is made up of highly basic, silicate, phosphoric acid salt and carbonate, and the degreasing fluid temperature is 60～80 ℃.Electrolytic degreasing liquid is active alkali, and alkali liquid temperature is 60～80 ℃, and current density is 8～10A/dm
2
Wherein, in the activation treatment, the etchant in the activation solution is a hydrochloric acid, and concentration 20g/L, solution temperature are 35 ± 5 ℃, and cathode current density is 7～10A/dm
2, erosion time is 20～30s.
Wherein, it is low chlorine ion water or pure water below the 600ppm that concentration is all adopted in washing after the oil removing and the washing after the activation, cleans, and cleaning water temperature is 30～40 ℃.
According to invention the steel band copperizing continuously is provided, wherein electroplating process comprises preplating copper and continuous main copper facing.The preplating copper electrolyte mainly is made up of cuprous cyanide, sodium cyanide and yellow soda ash, and cathode current density is 0.5～1A/dm during plating
2, temperature is 40～50 ℃, electroplating time is 1～2min.Continuously main copper-plated plating bath mainly is made up of cuprous cyanide, sodium cyanide and sodium hydroxide, and cathode current density is 0.2～2A/dm during plating
2, temperature is 55～65 ℃, electroplating time is selected according to the thickness of coating.In electroplating process, adopting selenite is inorganic brightening agent or other inorganic brightening agents of main brightener.
Embodiment 1
This embodiment is used to explain the method for steel band copperizing continuously provided by the invention.
(1) pre-treatment
(1). hot water wash: the steel band that 300mm is wide is immersed in 70～80 ℃ the hot water fully, cleans 20～30s.
(2). electrochemical deoiling: the steel band after step (1) processing is immersed in the degreasing fluid of being made up of highly basic, silicate, phosphoric acid salt and carbonate, and the degreasing fluid temperature is 60～80 ℃, and the oil removing time is 2min.
(3). electrolytic degreasing: the steel band after step (2) processing is immersed in the electrolytic degreasing liquid, and alkali liquid temperature is 60～80 ℃, and current density is 8～10A/dm
2, at first negative electrode oil removing 1min, anode oil removing 15s then.
Use concentration as low chlorine ion water or pure water below the 600ppm after the oil removing, clean.
(4). activation: the steel band after step (2) processing is immersed in the activation solution, and the etchant of activation solution is a hydrochloric acid, and concentration 20g/L, solution temperature are 35 ± 5 ℃, and cathode current density is 7～10A/dm
2, erosion time is 25s.Corrode the back and use concentration, clean as low chlorine ion water or pure water below the 600ppm.
(2) electro-coppering
(5). preplating copper: the steel band that step (4) is obtained is immersed in the plating bath of being made up of cuprous cyanide, sodium cyanide and yellow soda ash, electroplates 2min.Cathode current density is 1A/dm during plating
2, temperature is 50 ℃.
(6). continuous main copper facing: the steel band that step (5) is obtained is immersed in the plating bath of being made up of cuprous cyanide, sodium cyanide and sodium hydroxide, and cathode current density is 1A/dm during plating
2, temperature is 55 ℃, electroplating time 30min.The copper facing steel band note that makes after the plating is 1#.
The technology groove that uses among the embodiment 1 is the dovetail groove of closed
Embodiment 2
This embodiment is used to explain the method for steel band copperizing continuously provided by the invention.
Method according to embodiment 1 is electroplated the wide steel band of 300mm, and the technology groove that uses among the embodiment 2 is open coating bath, and remaining is identical with the condition of embodiment 1.The copper facing steel band note that makes after the plating is 2#.
Embodiment 3
This embodiment is used to explain the method for steel band copperizing continuously provided by the invention.
Method according to embodiment 1 is electroplated the wide steel band of 300mm, and different is, does not carry out electrolytic degreasing, and remaining is identical with the condition of embodiment 1.The copper facing steel band note that makes after the plating is 3#.
Embodiment 4
This embodiment is used to explain the method for steel band copperizing continuously provided by the invention.
Method according to embodiment 1 is electroplated the wide steel band of 300mm, and different is, when electroplating, does not carry out preplating copper, and remaining is identical with the condition of embodiment 1.The copper facing steel band note that makes after the plating is 4#.
Embodiment 5
This embodiment is used to explain the method for steel band copperizing continuously provided by the invention.
Method according to embodiment 1 is electroplated the wide steel band of 300mm, and different is when electroplating, to use selenite inorganic brightening agent or other inorganic brightening agents as main brightener.Remaining is identical with the condition of embodiment 1.The copper facing steel band note that makes after the plating is 5#.
Embodiment 6
This embodiment is used to explain the method for steel band copperizing continuously provided by the invention.
Method according to embodiment 1 is electroplated the wide steel band of 300mm, and different is when electroplating, to use organic brightening agent.Remaining is identical with the condition of embodiment 1.The copper facing steel band note that makes after the plating is 6#.
Annotate: all do not use brightening agent among the embodiment 1-4.
The coating performance test
The plated item that embodiment 1-3 is obtained according to following method carries out the test of high bake, sticking power test and cold-resistant thermal shock resistance properties, and the outward appearance of plating piece is estimated, and the result is as shown in table 1.
(1). high bake: each plating piece is toasted 30min down at 180 ℃, naturally cool to room temperature then, observation has or not the foaming phenomenon.
(2). the sticking power test
Testing standard: ISO 2409
Testing method: use blade to mark the grid of the length of side as 1mm at coating surface.Guarantee that cut all is cut to the matrix of copper facing steel band.Along the both direction of cut each with brush 5 times.Be bonded at adhesive tape on the surface, with finger tip that wiping belt is tight, guarantee to contact with the good of coating, when 5min, throw off adhesive tape is well-regulated in 0.5-1s with 60 ° angle from the free end of adhesive tape.
Grade classification
0 grade: the edge of otch is level and smooth fully, and the square of grid does not all peel off;
1 grade: the area that peels off part is not more than and 5% of the surperficial adhesive tape area that contacts;
2 grades: peel off area partly greater than 5%, and be no more than 15%;
3 grades: peel off area partly greater than 15%, and be no more than 35%;
4 grades: peel off area partly greater than 35%, and be no more than 65%;
5 grades: the area that peels off part is greater than 65%.
Accept standard: 0 grade and 1 grade of acceptance.
(3). temperature shock
Testing method: plating piece is respectively placed 45min under-40 ℃ and 85 ℃ of each temperature, be one-period, totally 27 cycles, test after at room temperature recover 2h less than 10s switching time.Observation sample situation then.
Accept standard: product surface coating does not have cracking, bubble, the phenomenon that comes off.
(4). whether observe appearance: it is smooth to observe workpiece surface.
(5). thickness measurement: use magnetic-type gage to measure thickness of coating.
(6). porosity measurement
Measuring method: paste filter paper method.With the wetting paper that is soaked with test soln be affixed on through pretreated to be tested intercalation on, test solution on the filter paper infiltrates in the hole and intermediate deposit or matrix metal effect, generates to have thing and levy the spot of color and on filter paper, show.How much evaluate the coating porosity with what the color spot look arranged on the filter paper then.
In addition 1#-6# is carried out welding test, observe the sealing-off phenomenon whether occurs.
Table 1
Can find out that from table 1 the present invention combines and handles through using electrochemical deoiling, male-female utmost point associating oil removing, increases the strike copper plating preface, can strengthen the bonding force of coating, guarantees the workpiece outward appearance in the steel band continuous electroplating.Through using the closed dovetail groove can improve electrodepositing speed.In the steel band copperizing continuously, " the sealing-off phenomenon " that occurs when using inorganic brightening agent can avoid the workpiece welding.
Claims (13)
1. the steel band copperizing continuously adopts cyanide copper plating process to electroplate.Mainly comprise pre-treatment process and electro-coppering process.Pre-treatment mainly comprises electrochemical deoiling, electrolytic degreasing, washing, activation, washing etc.; Electroplating process mainly comprises preplating copper, main copper facing, recovery, washing etc.In the steel band copperizing continuously, each technology groove adopts the dovetail groove of closed; Way of recycling adopts the mode of atomizing spray to reclaim.Circulating filtration through filter in the copper facing process quickens electrodeposition rate; The brightening agent that uses in the plating is with selenite inorganic brightening agent or other inorganic brightening agents as main brightener.
2. according to the said steel band copperizing continuously of claim 1, it is characterized in that: the electrochemical deoiling liquid in the pre-treatment process mainly contains highly basic, silicate, phosphoric acid salt and carbonate to be formed, and the degreasing fluid temperature is 60～80 ℃.
3. according to the said steel band copperizing continuously of claim 1, it is characterized in that: electrolytic degreasing liquid is active alkali in the pre-treatment process, and alkali liquid temperature is 60～80 ℃, and current density is 8～10A/dm
2
4. according to the said steel band copperizing continuously of claim 1, it is characterized in that: electrolytic degreasing adopts male-female utmost point associating oil removing in the pre-treatment process, wherein the negative electrode oil removing time long, the anode oil removing time lacks.
5. according to the said steel band copperizing continuously of claim 1, it is characterized in that: the etchant in the pre-treatment process in the activation solution is a hydrochloric acid, and concentration 20g/L, solution temperature are 35 ± 5 ℃, and cathode current density is 7～10A/dm2, and erosion time is 20～30s.
6. according to the said steel band copperizing continuously of claim 1.It is characterized in that: adopt 1 the preplating groove that is arranged in order, 5 coating baths, 1 accumulator tank and 1 rinse bath in the electro-coppering.
7. steel band copperizing continuously according to claim 1 is characterized in that: the preplating copper electrolyte mainly is made up of cuprous cyanide, sodium cyanide and yellow soda ash in the electro-coppering, and cathode current density is 0.5～1A/dm during plating
2, temperature is 40～50 ℃, electroplating time is 1～2min.
8. steel band copperizing continuously according to claim 1 is characterized in that: the mode of multi-work-station continuous electroplating is adopted in main copper facing, and plating bath mainly is made up of cuprous cyanide, sodium cyanide and sodium hydroxide, and cathode current density is 0.2～2A/dm during plating
2, temperature is 55～65 ℃, electroplating time is selected according to the thickness of coating.
9. steel band copperizing continuously according to claim 1 is characterized in that: it is low chlorine ion water or pure water below the 600ppm that concentration is adopted in the cleaning washing in each process.
10. steel band copperizing continuously according to claim 1 is characterized in that: the technology groove in the steel band copperizing continuously adopts the technology groove that has viewing window of closed.
11. steel band copperizing continuously according to claim 1 is characterized in that: in the steel band copperizing continuously, adopt the mode of atomizing spray that the remaining plating bath on the steel band is reclaimed.
12. steel band copperizing continuously according to claim 1 is characterized in that: plating bath stirs through the circulating filtration of filter in the coating bath in the steel band copperizing continuously, quickens electrodeposition rate.
13. steel band copperizing continuously according to claim 1 is characterized in that: the brightening agent employing is inorganic brightening agent or other inorganic brightening agents of main brightener with the selenite in the steel band copperizing continuously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110290875.6A CN102605400B (en) | 2011-09-29 | 2011-09-29 | Steel strip continuous copper plating process |
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| CN201110290875.6A CN102605400B (en) | 2011-09-29 | 2011-09-29 | Steel strip continuous copper plating process |
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| CN102605400B CN102605400B (en) | 2014-10-08 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290463A (en) * | 2013-06-22 | 2013-09-11 | 兰溪市卓越电子有限公司 | Electroplating steel electrolytic oil removal method |
| CN103668374A (en) * | 2013-12-19 | 2014-03-26 | 株洲永盛电池材料有限公司 | Method for carrying out one-side copper plating on wide stainless steel band and electroplating bath |
| CN103924275A (en) * | 2014-05-11 | 2014-07-16 | 山东建筑大学 | Steel belt continuous copper plating IV |
| CN103938238A (en) * | 2014-05-11 | 2014-07-23 | 山东建筑大学 | Steel strip continuous copper plating III |
| CN103938244A (en) * | 2014-05-11 | 2014-07-23 | 山东建筑大学 | Continuous copper plating II for steel strip |
| CN103938239A (en) * | 2014-05-11 | 2014-07-23 | 山东建筑大学 | Steel band continuous copper plating I |
| CN103952735A (en) * | 2014-05-11 | 2014-07-30 | 山东建筑大学 | Steel band continuous copper plating V |
| CN103952737A (en) * | 2014-05-11 | 2014-07-30 | 山东建筑大学 | Steel band continuous copper plating VI |
| CN104451832A (en) * | 2014-10-21 | 2015-03-25 | 德清县浙北通讯器材有限公司 | Liquid recovery device for wire electroplating equipment |
| CN105063732A (en) * | 2015-08-27 | 2015-11-18 | 天津佰金隆金属制品有限公司 | Device for cyanide-free copper plating |
| CN107620116A (en) * | 2017-11-03 | 2018-01-23 | 安徽新合富力科技有限公司 | A kind of powder metallurgy zirconium-base alloy surface treatment method |
| CN114214682A (en) * | 2021-12-22 | 2022-03-22 | 东莞市金瑞五金股份有限公司 | Electroplating process for copper plating of workpiece and electroplating equipment thereof |
| CN114657616A (en) * | 2022-04-20 | 2022-06-24 | 阳江市鼎华晟新材料科技有限公司 | Stainless steel copper plating process |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290463A (en) * | 2013-06-22 | 2013-09-11 | 兰溪市卓越电子有限公司 | Electroplating steel electrolytic oil removal method |
| CN103668374B (en) * | 2013-12-19 | 2016-05-18 | 湖南永盛新材料股份有限公司 | A kind of wide cut stainless steel band one side copper coating and electroplating bath |
| CN103668374A (en) * | 2013-12-19 | 2014-03-26 | 株洲永盛电池材料有限公司 | Method for carrying out one-side copper plating on wide stainless steel band and electroplating bath |
| CN103938244B (en) * | 2014-05-11 | 2016-07-06 | 山东建筑大学 | A kind of electroplating technology of continuous copper-plating of steel strip |
| CN103938244A (en) * | 2014-05-11 | 2014-07-23 | 山东建筑大学 | Continuous copper plating II for steel strip |
| CN103938239A (en) * | 2014-05-11 | 2014-07-23 | 山东建筑大学 | Steel band continuous copper plating I |
| CN103952735A (en) * | 2014-05-11 | 2014-07-30 | 山东建筑大学 | Steel band continuous copper plating V |
| CN103952737A (en) * | 2014-05-11 | 2014-07-30 | 山东建筑大学 | Steel band continuous copper plating VI |
| CN103952737B (en) * | 2014-05-11 | 2016-03-02 | 山东建筑大学 | A kind of technique of continuous copper-plating of steel strip |
| CN103938238A (en) * | 2014-05-11 | 2014-07-23 | 山东建筑大学 | Steel strip continuous copper plating III |
| CN103924275A (en) * | 2014-05-11 | 2014-07-16 | 山东建筑大学 | Steel belt continuous copper plating IV |
| CN104451832A (en) * | 2014-10-21 | 2015-03-25 | 德清县浙北通讯器材有限公司 | Liquid recovery device for wire electroplating equipment |
| CN105063732A (en) * | 2015-08-27 | 2015-11-18 | 天津佰金隆金属制品有限公司 | Device for cyanide-free copper plating |
| CN107620116A (en) * | 2017-11-03 | 2018-01-23 | 安徽新合富力科技有限公司 | A kind of powder metallurgy zirconium-base alloy surface treatment method |
| CN114214682A (en) * | 2021-12-22 | 2022-03-22 | 东莞市金瑞五金股份有限公司 | Electroplating process for copper plating of workpiece and electroplating equipment thereof |
| CN114657616A (en) * | 2022-04-20 | 2022-06-24 | 阳江市鼎华晟新材料科技有限公司 | Stainless steel copper plating process |
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