CN202088562U - Tin-soldering aluminum tape with high-corrosion resistance - Google Patents
Tin-soldering aluminum tape with high-corrosion resistance Download PDFInfo
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- CN202088562U CN202088562U CN2011201620709U CN201120162070U CN202088562U CN 202088562 U CN202088562 U CN 202088562U CN 2011201620709 U CN2011201620709 U CN 2011201620709U CN 201120162070 U CN201120162070 U CN 201120162070U CN 202088562 U CN202088562 U CN 202088562U
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Abstract
The utility model discloses a tin-soldering aluminum tape with high-corrosion resistance. The aluminum tape can be widely applied to various fields such as electron, energy, precise instrument, automobile and the like, and the problem that the aluminum tape is difficult to solder is solved. Aluminum or aluminum alloy tape (short for aluminum tape) serves as a base. The two sides of the aluminum tape are respectively and sequentially electroplated with a copper plating layer, a nickel cobalt alloy plating and a tin nickel alloy plating. The electroplated multilayer film and the base have good bonding force, higher corrosion resistance and better tin-soldering performance. The tin-soldering aluminum tape with high-corrosion resistance can be produced by continuous electroplating method, thereby meeting the surface treatment requirement of the aluminum tape.
Description
Technical field
The utility model belongs to material processing field, but is specifically related to a kind of soldering aluminium strip with highly corrosion resistant performance.
Background technology
Along with the progress of expanding economy, society, the resource that the whole world is faced, the energy, environmental problem are with increasingly serious.In recent years, for energy savings and material, reduce production costs, various metallic articles develop towards light, thin, short, little direction.Plurality of advantages such as aluminium has light weight, and specific strength is good, and conductive and heat-conductive rate height is easy to reclaim, and cost is relatively low have obtained use more and more widely.
The premium properties that aluminium that is prepared from by aluminum profile extrusion and aluminum alloy strip (hereinafter to be referred as aluminium strip) have aluminium, at first, the proportion of aluminium strip only is 1/3rd of steel band, therefore adopts aluminium strip to replace steel band can significantly reduce the weight of metallic article; Secondly, the conducting electricity very well of aluminium strip, the electrical conductivity of aluminium is 60% of a copper, but density only be 1/3rd of copper, the price of aluminium only be 1/5th of a copper, so with electrical conductivity calculating, the cost of aluminium strip is far below copper strips; The 3rd, the good heat conductivity of aluminium strip, the coefficient of heat conduction of aluminium is 3 times of steel, density only is about half of steel band, uses aluminium strip to do the heat conducting material cost and will significantly reduce; The 4th, advantage such as that aluminium also has is nontoxic, environmental protection.Based on above-mentioned advantage, it has obtained extensive use in various fields such as electronics, the energy, precision instrument, automobiles aluminium strip.
But because the acid and alkali resistance corrosive nature of aluminium is relatively poor, shortcomings such as welding performance difference are restricted the application of aluminium strip.In order to overcome above-mentioned shortcoming, those skilled in the art combine aluminium strip and nickel corrosion-resistant, easy welding usually.At present, the industrial connected mode that is used for of aluminium strip and nickel mainly contains following three kinds of modes:
1, ultrasonic bonding.Production at the positive pole ear material of Soft Roll lithium ion battery is exactly to adopt the mode of ultrasonic bonding that aluminium strip is connected with nickel strap, makes it reach the purpose with soldering performance.But this mode aluminium strip and nickel adhesion are not good, and production efficiency is lower, and range of application is little, can only be used to improve the preparation of the anodal machine ear material of Soft Roll lithium ion battery, can't extensive use.
2, electric resistance welding.Also have at present and adopt the mode of resistance electric welding that aluminium, nickel are connected.The principle of resistance electric welding is logical certain electric current at workpiece tie point place, utilizes electric current to produce a large amount of heats at short notice and realizes welding after with the metal molten of junction.On principle, electric resistance welding is to utilize the fuel factor of electric current to carry out sweat soldering, and heating efficiency is very high, and hot melt and welding effect should be fine.Yet this mode percent defective is higher, this is because metallic aluminium is the comparatively loose metal material of a kind of quality, and fusing point is lower, and resistivity is less, and the nickel fusing point is higher, resistivity is bigger, therefore these two kinds of metals difference on fusing point and resistivity is bigger, causes heat and electric current mainly to concentrate on the lower rate interface of fusing point, if electric current is too small, even aluminium strip begins fusing, nickel strap does not also change; Make nickel strap begin softening or fusing if electric current increased, aluminium strip then can be easily burnt by moment or is blown because of electric current is excessive.
3, aluminium nickel composite band.But the highly corrosion resistant soldering aluminium strip that range of application is the widest in the market is an aluminium nickel composite band, and this band is that aluminium strip and the nickel strip mode by hot rolling is combined with each other, and annealed again Processing of Preparation forms.But the production cost of aluminium nickel composite band is more than 10 times of common aluminium strip price, and fancy price has limited its application.
At above problem, those skilled in the art have proposed various settling modes.
Mention among the Chinese patent CN101414673A, on aluminium strip, be provided with nickel coating, aluminium strip can directly be welded, can not cause sealing-off.But the whole bag of tricks of nickel plating all has different problems on the aluminium strip, adopts method nickel plating on the aluminium strip both sides of present plating or chemical plating, can cause aluminium strip toughness variation, and the very easy fracture of aluminium strip reduces product percent of pass and service life; If the method with magnetron sputtering or vacuum evaporation prepares aluminium strip nickel plating, the cost that then prepares ear pole material is higher.
Mention among the Chinese patent CN100396481C, two nickel strips are stacked and placed on individual layer aluminium strip two sides respectively, the positive and negative electrode of electric resistance welding equipment is connected with the nickel strip respectively, the opening resistor soldering equipment is implemented welding again.This method can reduce the requirement to welding equipment, reduces cost, and weld strength is also better simultaneously.Bigger tape welding connects aluminium strip but this welding method can't satisfy area, and production technology is also more loaded down with trivial details simultaneously, can't carry out streamline production.
The utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of than high welding performance and stronger aluminium strip and the aluminum alloy strip (hereinafter to be referred as aluminium strip) of decay resistance.This aluminium strip not only has soldering performance preferably, also has excellent corrosion resisting performance, can be widely used in various fields such as electronics, the energy, precision instrument, automobile.
But a kind of soldering aluminium strip with highly corrosion resistant performance is substrate with the aluminum or aluminum alloy band, all electro-coppering coating, nickel-cobalt alloy plating, tin-nickel alloy coating successively in the both sides of substrate.
Cobalt content is 0.5%～5% in the described nickel-cobalt alloy plating, and tin content is 60%～95% in the described tin-nickel alloy coating.
Described copper coating thickness is 0.2～1.0 μ m; Described nickel-cobalt alloy plating thickness is 0.2～1.0 μ m, and described tin-nickel alloy thickness of coating is 0.2～1.0 μ m.
Bottom of the present utility model is a copper coating, and its thickness is 0.2～1.0 μ m.Selecting copper coating is the factor of considering following three aspects as bottom: 1, the thermal coefficient of expansion of aluminium and nickel differs bigger, copper falls between, with the bottom of copper coating as multilayer coating, can cushion the substrate that produces owing to variations in temperature and the stress between the nickel coating, guarantee that coating has good bonding force; 2, aluminium belongs to amphoteric metal, too high or too low pH value all can cause aluminium when electroplating with metallic solution generation displacement reaction, foul solution, reduction binding force of cladding material.Electro-coppering coating adopts weakly alkaline pyrophosphate system, and copper can not react with aluminium substrate during plating, and aluminium strip is coated, make its under acid system during nickel-cobalt alloy plating not can with solution generation displacement reaction.3, electroplating other metals is simple and easy to do on copper coating, and adhesion is good.Thickness of coating is elected 0.2～1.0 μ m as, if be lower than 0.2 μ m, can't play the efficient buffer effect, and effective metallized aluminum strip substrate, as if being higher than 1.0 μ m, does not have positive effect, increases cost simultaneously.
Intermediate layer of the present utility model is a nickel-cobalt alloy plating, and wherein cobalt content is 0.5%～5%, and its thickness is 0.2～1.0 μ m.Selecting for use nickel-cobalt alloy plating as the intermediate layer, is that this coating can effectively improve the acid-alkali-corrosive-resisting performance of aluminium strip because nickel-cobalt alloy plating has decay resistance preferably, also can improve the case hardness of aluminium strip simultaneously.This coating is to adopt the technology of pulse plating to be prepared from, the nickel-cobalt alloy plating that this technology is prepared has adhesion preferably, less crystallite dimension has reduced the porosity of coating simultaneously, further strengthened the decay resistance of coating, also reduce the internal stress of coating, improved the toughness of coating.This thickness of coating is elected 0.2～1.0 μ m as, is lower than 0.2 μ m, can't embody this coating decay resistance preferably because coating is crossed to approach; Be higher than 1 μ m, coating can not produce obvious effects more, can produce the increase cost simultaneously, also can increase internal stress, reduces ductility of electrodeposited film.
Top layer of the present utility model is a tin-nickel alloy coating, and wherein the content of tin is 60%～95% in the coating, and its thickness is 0.4～1.5 μ m.Selecting for use nickeltin coating as the top layer, is because nickeltin has good soldering performance, also has decay resistance preferably simultaneously, and nickeltin coating is compared with tin coating, hardness is higher, is difficult for producing cut, makes prepared product have better outward appearance and scratch resistance performance.The electronickelling tin alloy coat adopts the pyrophosphate system, adds the additive SN-112 of 1～10g/L simultaneously, makes the tin nickel can codeposition.Thickness of coating is controlled between 0.4～1.5 μ m, and mistake is thin or blocked up all can to influence the soldering performance.
The utility model adopts multi-layer film structure, has remedied deficiency separately again mutually when having merged each monofilm advantage, and has produced the character that monofilm does not have:
1, multi-layer film structure can effectively improve the decay resistance of aluminium strip.The structure of coating structure copper, nickel cobalt (alloy), tin-nickel alloy, the current potential of nickel is minimum in the three-layer metal, and the current potential of substrate aluminium is lower than nickel, but is coated on inside closely by three layers of coating, can not be corroded.Nickel can be corroded as sacrificing coating, yet nickel cobalt, nickeltin all have decay resistance preferably, particularly nickel-cobalt alloy plating, can stop acid, the alkali corrosion to aluminium strip preferably.Simultaneously, the current potential of nickel, cobalt, tin differs very little, the galvanic cell sluggish of formation, and corrosion rate is very slow, makes the performance of the decay resistance of aluminium strip, particularly acid-alkali-corrosive-resisting be greatly improved.
2, multi-layer film structure can improve the adhesion of coating.The adhesion of aluminium and nickeltin is relatively poor, nickel cobalt (alloy) is owing to the thermal coefficient of expansion with aluminium differs bigger, the Direct Electroplating nickel cobalt (alloy) also is easy to generate coating and comes off on aluminium, and the thermal coefficient of expansion of copper is between the al and ni cobalt alloy, so copper coating can combine aluminium substrate and nickel-cobalt alloy plating as transition zone, when aluminium strip carries out soldering, the nickeltin soldering performance on top layer is good, is closely linked by scolder and other elements, the phenomenon of sealing-off can not occur.The heat that produces during soldering can be metal generation thermal expansion, but owing to thermal coefficient of expansion between the adjacent metal coating is more or less the same, therefore also can not occur owing to expansion of metal produces the phenomenon that stress causes coating to come off.
But the corrosion resistance and good with soldering aluminium strip of highly corrosion resistant performance of the present utility model, soldering performance height, the advantage that binding force of cladding material is strong.Its preparation technology is simple and easy to do for aluminium strip of the present utility model, can adopt the method for continuous electroplating to produce, and production cost is low, output is big, effective, satisfies the requirement of aluminium strip surface-treated, has higher using value and promotional value.
Description of drawings
Fig. 1 is the structural representation of band of the present invention;
Wherein 1 is substrate, and 2 is copper coating, and 3 is nickel-cobalt alloy plating, and 4 is tin-nickel alloy coating.
Fig. 2 is preparation technology's flow chart of band of the present invention.
The specific embodiment
Following examples are intended to illustrate the utility model rather than to further qualification of the present utility model.
(embodiment)
Referring to Fig. 1, the utility model is substrate 1 with the aluminum or aluminum alloy band, all is electroplate with copper coating 2, nickel-cobalt alloy plating 3, tin-nickel alloy coating 4 successively in the both sides of substrate 1.
Select A1060H16 for use, the aluminium strip of thickness 0.2mm adopts following technology as base material, and it is handled.
1, aluminium strip surface pre-treatment: alkaline etching, washing, pickling, wash, soak zinc, washing, pickling, washing, secondary soaking zinc, washing;
2, electrodeposition technology: electro-coppering, washing; Nickel-cobalt alloy plating, washing; Electronickelling ashbury metal, washing; Oven dry.
3, electroplate post processing: the insulation dehydrogenation.
The prescription and the treatment process of above-mentioned various solution, plating bath are as follows:
The prescription of alkaline etching solution and treatment process:
NaOH： 30～70g/L
Na
3PO
4： 20～50g/L
Na
2CO
3： 15～40g/L
Temperature: 30～50 ℃
The alkaline etching time: 1min
The prescription of Acidwash solution and treatment process:
Nitric acid: 1: 1 salpeter solution
Time: 1min
The prescription of a zinc dipping solution and treatment process:
ZnO： 100g/L
NaOH： 450g/L
Sodium potassium tartrate tetrahydrate: 20g/L
FeCl
3： 1g/L
Temperature: 25 ℃
Time: 60s
The prescription of secondary soaking zinc solution and treatment process:
ZnO： 30g/L
NaOH： 120g/L
Sodium potassium tartrate tetrahydrate: 60g/L
FeCl
3： 1g/L
Temperature: 25 ℃
Time: 30s
The prescription of copper plating solution and treatment process:
Cu
2P
2O
7： 65g/L
Potassium pyrophosphate: 300g/L
Ammonium citrate: 20g/L
Ammoniacal liquor: 3ml/L
pH： 8.5
Temperature: 45 ℃
Current density: 1A/dm
2
The prescription of nickel-cobalt plating solution and treatment process:
The pulse plating technological parameter:
Current density: 5A/dm
2
PH value: 3.5
i
on： 20ms
i
off： 20ms
Temperature: 50 ℃
Anode: nickel plate
The prescription and the treatment process of nickel plating ashbury metal solution:
K
4P
2O
7.3H
2O 300g/L，
NiSO
4.6H
2O 45g/L，
SnCl
2.2H
2O 40g/L，
Dodecyl sodium sulfate 1g/L,
Hydroquinones 1g/L,
Asccharin 0.8g/L;
Additive SN-112 5g/L
Electroplating technological parameter:
Current density: 2A/dm
2
Anode: sheet tin, nickel plate
Insulation dehydrogenation technology:
Temperature: 160 ℃
Time: 15h
Prepare sample according to above-mentioned technology, and the sample of preparation is carried out following test.
1, binding force of cladding material test.
Binding force of cladding material adopts GB/T9286-1998 (test of hundred lattice) to test, and its binding force of cladding material is good, and no grid comes off, bond strength: 0 grade, adhesion is good.
2, welding performance test.
Two samples are welded, and bonding area is 10*10mm, and the sample that connects with the omnipotent stretching-machine butt welding of HY-1080 type stretches, and pulling-off force is greater than 800N, and welding performance is good.
3, decay resistance test.
The preparation sample is got area does acid salt spray test for the 100mm*100mm size, result such as following table:
| The salt spray test time | 4h | 8h | 12h | 16h | 20h | 24h |
| Rust spot quantity | No rust spot | No |
1 |
3 rust spots | 7 rust spots | 16 rust spots |
Claims (2)
1. but the soldering aluminium strip with highly corrosion resistant performance is characterized in that, is substrate with the aluminum or aluminum alloy band, all is electroplate with copper coating, nickel-cobalt alloy plating, tin-nickel alloy coating successively in the both sides of substrate.
2. but a kind of soldering aluminium strip with highly corrosion resistant performance according to claim 1 is characterized in that described copper coating thickness is 0.2～1.0 μ m; Described nickel-cobalt alloy plating thickness is 0.2～1.0 μ m, and described tin-nickel alloy thickness of coating is 0.2～1.0 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201620709U CN202088562U (en) | 2011-05-20 | 2011-05-20 | Tin-soldering aluminum tape with high-corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201620709U CN202088562U (en) | 2011-05-20 | 2011-05-20 | Tin-soldering aluminum tape with high-corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202088562U true CN202088562U (en) | 2011-12-28 |
Family
ID=45363651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201620709U Expired - Fee Related CN202088562U (en) | 2011-05-20 | 2011-05-20 | Tin-soldering aluminum tape with high-corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212855A (en) * | 2011-05-20 | 2011-10-12 | 湘潭大学 | Aluminium strip with tin soldering performance and high corrosion resistance and preparation technology thereof |
| WO2013148967A1 (en) * | 2012-03-30 | 2013-10-03 | Adhesives Research, Inc. | Charge collection tape |
| TWI494532B (en) * | 2012-09-25 | 2015-08-01 | 行政院原子能委員會核能研究所 | Heat-conducting structure and heat exchanger and heat-exchanging system using thereof |
| CN105063703A (en) * | 2015-03-13 | 2015-11-18 | 广东欧珀移动通信有限公司 | Surface treatment method of die casting aluminum alloy piece and die casting aluminum alloy product |
| CN105599386A (en) * | 2015-12-23 | 2016-05-25 | 常熟市东方特种金属材料厂 | Ferromagnetic damping and vibration attenuation alloy |
| CN111826697A (en) * | 2020-07-08 | 2020-10-27 | 青岛诚悦电气设备有限公司 | Electroplating pretreatment method of 6061 type aluminum alloy electrode |
| CN115175466A (en) * | 2022-07-04 | 2022-10-11 | 江苏富乐华半导体科技股份有限公司 | Welding method for improving electroplating tin-nickel alloy on surface of ceramic copper-clad substrate |
-
2011
- 2011-05-20 CN CN2011201620709U patent/CN202088562U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212855A (en) * | 2011-05-20 | 2011-10-12 | 湘潭大学 | Aluminium strip with tin soldering performance and high corrosion resistance and preparation technology thereof |
| CN102212855B (en) * | 2011-05-20 | 2012-07-11 | 湘潭大学 | Aluminium strip with tin soldering performance and high corrosion resistance and preparation technology thereof |
| WO2013148967A1 (en) * | 2012-03-30 | 2013-10-03 | Adhesives Research, Inc. | Charge collection tape |
| US9238760B2 (en) | 2012-03-30 | 2016-01-19 | Adhesives Research, Inc. | Charge collection side adhesive tape |
| TWI494532B (en) * | 2012-09-25 | 2015-08-01 | 行政院原子能委員會核能研究所 | Heat-conducting structure and heat exchanger and heat-exchanging system using thereof |
| CN105063703A (en) * | 2015-03-13 | 2015-11-18 | 广东欧珀移动通信有限公司 | Surface treatment method of die casting aluminum alloy piece and die casting aluminum alloy product |
| CN105063703B (en) * | 2015-03-13 | 2017-10-31 | 广东欧珀移动通信有限公司 | The surface treatment method and pack alloy product of pack alloy part |
| CN105599386A (en) * | 2015-12-23 | 2016-05-25 | 常熟市东方特种金属材料厂 | Ferromagnetic damping and vibration attenuation alloy |
| CN111826697A (en) * | 2020-07-08 | 2020-10-27 | 青岛诚悦电气设备有限公司 | Electroplating pretreatment method of 6061 type aluminum alloy electrode |
| CN115175466A (en) * | 2022-07-04 | 2022-10-11 | 江苏富乐华半导体科技股份有限公司 | Welding method for improving electroplating tin-nickel alloy on surface of ceramic copper-clad substrate |
| CN115175466B (en) * | 2022-07-04 | 2023-06-06 | 江苏富乐华半导体科技股份有限公司 | Welding method for improving electroplated tin-nickel alloy on surface of ceramic copper-clad substrate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20130520 |