CN103046099A - Continuous anode photooxidation compound technology for aluminium strip - Google Patents
Continuous anode photooxidation compound technology for aluminium strip Download PDFInfo
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Abstract
The invention discloses a continuous anode photooxidation compound technology for an aluminium strip. The technology comprises the treatment procedures of aluminium strip unreeling, alkaline washing silver white technology or alkaline etching titanium silver technology, water cleaning, neutralization technology, water cleaning, anodic oxidation technology, water cleaning, hole sealing technology, drying and reeling. With the adoption of the scheme, the aluminium strip treated by the compound technology has the characteristics that the aluminium strip has aging resistance and air corrosion resistance; an ornamental effect is better than a common anodic oxidation technology; and the aluminium strip is varied in texture, gorgeous in color, and environment-friendly and energy-saving in technology.
Description
Technical field
The present invention relates to the technical field that aluminium and aluminum alloy strip coiled material surface are processed, refer in particular to a kind of continuity anode photoxidation recombining process of aluminum strip.
Background technology
Aluminium is to use maximum in the non-ferrous metal, one of metallic substance that application surface is the widest, and it has a series of strong physics, chemistry and processing characteristics, and it is of many uses; High most advanced and sophisticated sci-tech product, high-grade building and ornament materials, communications and transportation, aerospace, lamp lighting and electric equipment products etc.
Purposes according to aluminium is different, some performance is desirable not enough, such as surfacecti proteon performance and secondary processing bending forming performances such as hardness, wear-resisting, ageing-resistant, chemical-resistant stabilities, therefore these performances can be processed its surface working by anodic oxidation and photoxidation recombining process, enlarge the aluminium range of application and increase the service life in anodised performance basis, play important meaning.
Along with the fast development in epoch, the experience of people's antianode alumina plate and electrolytic colouring technology is not perfection, such as the color on surface, decorative pattern, pattern are all unsatisfactory.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of ageing-resistant, chemical-resistant stability good, good decorating effect, beautiful in colour, simple process can present the continuity anode photoxidation recombining process of the aluminum strip of required floral designs and grain effect.
For achieving the above object, technical scheme provided by the present invention is: a kind of continuity anode photoxidation recombining process of aluminum strip, and the treatment scheme of this technique is as follows:
1), aluminum strip unreels;
2), alkali cleaning silvery white technique or alkaline etching titanium silver process, alkali cleaning silvery white technique is that the aluminium after unreeling is put into the solution that sodium hydroxide is 300-500g/L, Al3+＜30g/L, simultaneously, solution need add 30-50g/L Trisodium Citrate and the long-lived alkali annex solution of 50-80g/L, the control temperature is at 60～70 ℃, treatment time 30S, to the aluminium material surface natural oxide film dissolve, the leveling of the mechanical line of effects on surface, effects on surface greasy dirt carry out oil removing, the plate face is silvery white state after processing; Alkaline etching titanium silver process is that the aluminium after unreeling is put into sodium hydroxide is that 300-500g/L, Al3+ are the solution of 30～50g/L, simultaneously, solution adds 50-60g/L SODIUMNITRATE and the long-lived alkali annex solution of 50-80g/L, the control temperature is at 85～95 ℃, treatment time is 30S～45S, remove aluminium material surface Natural Oxide Film and spot, make aluminium material surface reach cloudy surface or sand face effect;
3), in and technique, put into the solution of concentration of nitric acid 10%-25% after will the aluminium water behind alkali cleaning silvery white or the alkaline etching titanium silver cleaning, room temperature treatment 30-180 second, remove the ash stain that is insoluble to alkali, and form one deck passive film at aluminium material surface;
4), anode oxidation process, put into anode oxidation groove liquid as the positive pole of anodic bonding to the oxidation power supply after the aluminium water after will neutralization cleans, the oxidation trough negative electrode is connected to the negative pole of oxidation power supply, under impressed voltage by electric current to keep electrochemical reaction; Wherein, described oxidation tank liquor comprises 180-230g/L sulfuric acid, 8-112g/L oxyacetic acid and glycerine, and oxidizing temperature is 18-23
0C, current density is 1.0-5A/dm
2, 5-20 minute continuous anodic oxidation time is to obtain the oxide film protection layer;
5), hole-sealing technology, be placed in the agent of 4-6g/L high temperature hole sealing dipping after the aluminium water after the anodic oxidation cleaned 5-10 minute, wherein, pH value is 5.3-6.0, the hole sealing agent solution temperature is controlled at 75-85
0C gets an anodic oxidation finished product after the oven dry;
6), rolling, obtain required mist silver color anode photoxidation recombining process product.
When finished product needs grain effect, need after aluminum strip unreels to process through drawing process, adopt mechanical system that aluminium is carried out grinding, process many moneys thickness grain effect different in size after, water cleans and just carries out the silvery white technique of alkali cleaning or alkaline etching titanium silver process again.
When needs increase color, after cleaning, the aluminium water after the anodic oxidation can not carry out hole-sealing technology, process and carry out nanometer coloured light oxidation closing process, after formation firmly has metalluster look thin film layer with al base sacrificial anode oxide film adhesive power, but just rolling obtains having the anode photoxidation recombining process product of multiple color.
When needs increase the barrier propterty of mist silver color anode photoxidation recombining process product and secondary processing buckling performance, but the aluminium behind the hole-sealing technology need carry out photoxidation protection closing process process after just rolling.
When needs increase the barrier propterty of anode photoxidation recombining process product and secondary processing buckling performance, but the aluminium after nanometer coloured light oxidation closing process is processed need carry out photoxidation protection closing process process after just rolling.
The processing mode of described nanometer coloured light oxidation closing process is: will be by acrylic acid ester 35～45%, aqueous acrylic resin dispersion 8～10%, photocatalyst 5%, Tio2 nano level 2～3%, inorganic and organic dye and dispersible carrier mixture are 5-15%, water and alcohol mixture are the mixed solution uniform atomizing that forms of 25～40% proportionings after the anodic oxidation and on the aluminium material surface of water after cleaning, the pH value of mixed solution is 5.5-6.0, viscosity of mixed liquid＜18S, adsorption time through 10～20S, allow mixed solution permeate the oxidation hole, by photocatalysis principle the surface of aluminum plate mixed solution is carried out photoxidation 15-30 second, allow surperficial mixed solution harden, forming with al base sacrificial anode oxide film adhesive power firmly has metalluster look thin film layer.
The processing mode of described photoxidation protection closing process is: will be by acrylic acid ester 35～45%, aqueous acrylic resin dispersion 8～10%, photocatalyst 5%, Tio2 nano level 2～3%, gas phase sio2 and tensio-active agent 5-15%, the mixed solution uniform atomizing that water and alcohol mixture 25～40% proportionings form is after processing through hole-sealing technology and on the aluminium material surface after the water cleaning, the pH value of mixed solution is 5.5-6.0, viscosity of mixed liquid＜18S, adsorption time through 10～20S, allow mixed solution permeate the oxidation hole, by photocatalysis principle the surface of aluminum plate mixed solution is carried out photoxidation 15-30 second, allow surperficial mixed solution harden, make aluminium reach required barrier propterty and secondary processing buckling performance.
The processing mode of described photoxidation protection closing process is: will be by acrylic acid ester 35～45%, aqueous acrylic resin dispersion 8～10%, photocatalyst 5%, Tio2 nano level 2～3%, gas phase sio2 and tensio-active agent 5-15%, the mixed solution uniform atomizing that water and alcohol mixture 25～40% proportionings form is after processing through nanometer coloured light oxidation closing process and on the aluminium material surface after the water cleaning, the pH value of mixed solution is 5.5-6.0, viscosity of mixed liquid＜18S, adsorption time through 10～20S, allow mixed solution permeate the oxidation hole, by photocatalysis principle the surface of aluminum plate mixed solution is carried out photoxidation 15-30 second, allow surperficial mixed solution harden, make aluminium reach required barrier propterty and secondary processing buckling performance.
Described high temperature hole sealing agent is without the nickel metal-salt.
What adopt when water cleans between the technique is that purity is 95% pure water.
The present invention through the aluminum strip that art breading of the present invention is crossed, has ageing-resistantly after having adopted such scheme, and anti-air corrosion, decorative effect are all good than common anode oxidizing process, and the product texture is changeable, and is lucuriant in design, the characteristics such as technique environmental protection and energy saving.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1: the continuity anode photoxidation recombining process of the described aluminum strip of the present embodiment, its treatment scheme is: aluminum strip unreels → drawing process → water cleaning → alkali washing process → water cleans → in and technique → water cleaning → anode oxidation process → water cleaning → hole-sealing technology → oven dry → nanometer coloured light oxidation closing process → photoxidation protect closing process → rolling.
Described aluminum strip can be selected the rolling aluminum winding, or light face, minute surface coiled strip; Thickness 0.3-1.5mm; Width 1000-1250mm; Outer coil diameter≤1500mm; Interior coil diameter: 430mm-500mm, weight≤5000kg.
The wire drawing treatment process steps is processed the wire drawing grain effect, obtain the surface of straight burr or irregular grain, but the inventive method selector tool wire-drawing equipment mode is processed.The machinery wire drawing is adopted different operating modes in processing, and can make aluminium material surface changeful, such as the straight burr effect, and length line effect, snowflake line effect etc., texture spacing density is adjustable, and can thickness not first-class.Aluminium is through after the mechanical wire drawing surface treatment; Make aluminium have good apparent condition, improve the surface finishing quality; Improve product hierarchy, produce the decorative effect of lines level.
Described alkali washing process is alkali cleaning silvery white technique, its processing mode is: it is 300-500g/L that the aluminium after will unreeling is put into sodium hydroxide, in the solution of Al3+＜30g/L, simultaneously, solution need add a certain amount of inhibiter, complexing agent and long-lived agent, as: Sunmorl N 60S, Trisodium Citrate etc., specifically add the long-lived alkali annex solution of 30-50g/L Trisodium Citrate and 50-80g/L, the control temperature is at 60～70 ℃, treatment time 30S, the effect of this alkali cleaning is that the coiled material surface natural oxide film is dissolved, the leveling that the mechanical line of effects on surface is slight, the greasy dirt slight to the aluminium coiled material surface carries out oil removing, and the plate face is silvery white state after processing.
In described and technique, in order to except the grey shape thing of attachment removal aluminium material surface with form passive surface, be the technique of a kind of bright dipping, ash disposal, aluminium can be removed the grey shape thing that is attached to aluminium material surface by neutralization after peracid or alkali etch.In acid, alkali etch process, the particle of contained intermetallic compound in the aluminium, participate in hardly the etch reaction of soda acid, can not be dissolved in the tank liquor yet, still remain in the surface of aluminium, form the upper layer of one deck grey black, loose grey shape thing, in and technique remove the grey thing remain in aluminium material surface, make aluminium material surface obtain the passive surface of cleaning light, its processing mode is: concentration of nitric acid 10%-25%, room temperature treatment 1-3 minute.In addition, the harm that the oxynitride that discharges because of the decomposition of nitric acid in the N-process and acid mist drip, the present embodiment can constitute jointly additive by multiple nitrate, wherein contains persulphate or hydrosulfate.
Described anode oxidation process is a kind of process of electrolytic oxidation, and the surface of aluminium is converted into layer oxide film in this process, and this tunic has protectiveness, ornamental and some other function.Aluminium should be as anodic bonding to the positive pole of oxidation power supply in anode oxidation groove liquid, and the oxidation trough negative electrode is connected to the negative pole of oxidation power supply, under impressed voltage by electric current to keep electrochemical oxidation reactions, make aluminium material surface generate a kind of rete of never drop-off.There are two opposition reactions of the formation of oxide film and dissolving simultaneously in aluminium in this anode oxidation process, the formation of final oxide film is that the relative size by two speed of response determines.Anode oxide film is transparent, the rete porous, and absorption property is strong, is easy to dyeing or covers sealer coat, and lovely luster is difficult for fading and has very strong metal-like and decoration function.The processing mode of described anode oxidation process is: 180-230g/L sulfuric acid, oxidizing temperature are 18-22
0C, current density is 1.5-5A/dm
2, 5-20 minute continuous anodic oxidation time.
The anodic oxidation treatment technique of aluminium is to generate the oxidized form anode oxide film basically, genus polyporus type anode oxide film, it is blocking layer and porous membrane layer two portions composition of metallic matrix, although the character of this porous is given oxidation film coloring or is coloured to other function, but its erosion resistance, weathering resistance, stain resistances etc. all can not adapt to practical requirement, so the micropore of aluminum anodized film must seal, the anode oxide film of sealing of hole not is because a large amount of micropore holes inner area, make the workpiece area change that is exposed in the environment, corresponding corroded area also can increase, so hole-sealing technology is a kind of very important technique of anodic oxidation of aluminiun materials.The processing mode of hole-sealing technology of the present invention is: be to flood 5-10 minute in the agent of 4-6g/L high temperature hole sealing, pH value 5.30-6.0, hole sealing agent solution temperature are 75-85
0C, described high temperature hole sealing agent is without the nickel metal-salt, cleaning, drying gets the anodic oxidation finished product one time behind the sealing of hole;
[0025]The said products is mist silver color oxygenated products, increases it such as needs and uses barrier propterty and secondary processing buckling performance, can increase photoxidation protection closing process, relates to its art breading mode and make description in embodiment 2.
Nanometer coloured light oxidation closing process, its product is mist silver color behind the once oxidation finished product, needs honorable gorgeous color such as product surface, adopts Ben Nami coloured light oxidation closing process.
Can not implement above-mentioned metal-salt hole-sealing technology when implementing Ben Nami coloured light oxidation closing process, namely product is guaranteed cleaning through the water cleaning, through baking oven 60 behind anode oxidation process
0Behind dry 20 seconds of the C, the mixing liquid uniform atomizing that will contain following material (printing tranfer system also can) on the plate face, adsorption time through 10～20S, allow mixed solution permeate the oxidation hole, by photocatalysis principle the surface of aluminum plate mixed solution is carried out photoxidation 15-30 second, allow surperficial mixed solution harden, formation and al base sacrificial anode oxide film adhesive power firmly environment-friendly type have metalluster look thin film layer.Mixed solution technique is as follows:
Acrylic acid ester 35～45%
Aqueous acrylic resin dispersion 8～10%
Photocatalyst 5%
Tio2 nano level 2～3%
Inorganic and organic dye and dispersible carrier mixture 5-15%
Water and alcohol mixture 25～40%
Ph value of mixture 5.5-6.0, viscosity of mixed liquid＜18S (being coated with 4).
Above-mentioned mixed solution is by pressure atomizing device uniform fold aluminium material surface, the liquid cladding thickness can be controlled in 0.5-5UM, set thickness depending on required shade, atomization of liquid amount is decided on required film thickness, and its amount that covers homogeneity and atomizing covering is controlled by computer spraying equipment digital control scheme.
Above-mentioned tectum is finished 10-20 and is carried out rear photochemical catalysis second, and the UV ultraviolet lamp equipment of the corresponding power of photochemical catalysis process using mixed solution of the present invention is finished processing, and the light-catalysed time is 20-30 second.
After purity is 95% pure water cleaning, guarantee that the plate face is clean between the above-mentioned technique, each is processed tank liquor and is not attached pollution by the plate face.
Can form clear-cut texture and anode photoxidation recombining process product lucuriant in design after above-mentioned art breading is finished, product direct covered with protective film after sealing is finished is finished the making of the color product of wire drawing texture metallic color.
Embodiment 2: the present embodiment is not implemented the drawing process step as different from Example 1, its technique change has corresponding variation in alkali washing process step and nanometer look closing process step, and increase photoxidation protection closing process, form dumb light, the anode photoxidation handicraft product of silver-colored light or various metals color.
Described alkali washing process is alkaline etching titanium silver process, removes surface of aluminum plate Natural Oxide Film and plate face spot, makes surface of aluminum plate reach cloudy surface or sand face effect, and the processing mode of alkaline etching technique of the present invention is as follows:
Sodium hydroxide 50-80g/L
Al3+ 30～50g/L
SODIUMNITRATE 50-60g/L
Long-lived alkali annex solution 50-80g/L
Temperature 85-95
0C
Time 30S～45S
In basic solution, add a certain amount of inhibiter, complexing agent and long-lived agent.As: SODIUMNITRATE, Sunmorl N 60S, Trisodium Citrate, metal-salt etc.
Forward neutralizing treatment step and anodic oxidation treatment step after the alkali cleaning step to, its art breading mode is identical with embodiment 1, needs water to clean between technique and guarantees that the plate face is clean, can finish the anodic oxidation finished product after the sealing of hole step of product in above-described embodiment 1.
Photoxidation protection closing process, because of behind above-mentioned sealing of hole the anode oxidation membrane barrier propterty is relatively poor, photoxidation protection sealing treatment is carried out in the rear surface, art breading mechanism is identical with nanometer coloured light oxidation closing process, but the mixed solution technique of atomizing need be made variation, and the processing mode of photoxidation protection closing process is as follows:
Acrylic acid ester 35～45%
Aqueous acrylic resin dispersion 8～10%
Photocatalyst 5%
Tio2 nano level 2～3%
Gas phase sio2 and tensio-active agent 5-15%
Water and alcohol mixture 25～40%
Ph value of mixture 5.5-6.0, viscosity of mixed liquid＜18S (being coated with 4).
Above-mentioned tectum is finished 10-20 and is carried out rear photochemical catalysis second, and the UV ultraviolet lamp equipment of the corresponding power of photochemical catalysis process using mixed solution of the present invention is finished processing, and the light-catalysed time is 20-30 second.
Product surface is the dumb light product of casual anti-body state after above-mentioned technique is finished, and has the metal color then can draw the coiled strip of the changeable aluminum anode photoxidation recombining process of gorgeous color by process implementing as described in the embodiment 1 such as product needed.
The examples of implementation of the above only are the present invention's preferred embodiment, are not to limit practical range of the present invention with this, therefore the variation that all shapes according to the present invention, principle are done all should be encompassed in protection scope of the present invention.
Claims (10)
1. the continuity anode photoxidation recombining process of an aluminum strip, it is characterized in that: the treatment scheme of this technique is as follows:
1), aluminum strip unreels;
2), alkali cleaning silvery white technique or alkaline etching titanium silver process, alkali cleaning silvery white technique is that the aluminium after unreeling is put into the solution that sodium hydroxide is 300-500g/L, Al3+＜30g/L, simultaneously, solution need add 30-50g/L Trisodium Citrate and the long-lived alkali annex solution of 50-80g/L, the control temperature is at 60～70 ℃, treatment time 30S, to the aluminium material surface natural oxide film dissolve, the leveling of the mechanical line of effects on surface, effects on surface greasy dirt carry out oil removing, the plate face is silvery white state after processing; Alkaline etching titanium silver process is that the aluminium after unreeling is put into sodium hydroxide is that 300-500g/L, Al3+ are the solution of 30～50g/L, simultaneously, solution adds 50-60g/L SODIUMNITRATE and the long-lived alkali annex solution of 50-80g/L, the control temperature is at 85～95 ℃, treatment time is 30S～45S, remove aluminium material surface Natural Oxide Film and spot, make aluminium material surface reach cloudy surface or sand face effect;
3), in and technique, put into the solution of concentration of nitric acid 10%-25% after will the aluminium water behind alkali cleaning silvery white or the alkaline etching titanium silver cleaning, room temperature treatment 30-180 second, remove the ash stain that is insoluble to alkali, and form one deck passive film at aluminium material surface;
4), anode oxidation process, put into anode oxidation groove liquid as the positive pole of anodic bonding to the oxidation power supply after the aluminium water after will neutralization cleans, the oxidation trough negative electrode is connected to the negative pole of oxidation power supply, under impressed voltage by electric current to keep electrochemical reaction; Wherein, described oxidation tank liquor comprises 180-230g/L sulfuric acid, 8-112g/L oxyacetic acid and glycerine, and oxidizing temperature is 18-23
0C, current density is 1.0-5A/dm
2, 5-20 minute continuous anodic oxidation time is to obtain the oxide film protection layer;
5), hole-sealing technology, be placed in the agent of 4-6g/L high temperature hole sealing dipping after the aluminium water after the anodic oxidation cleaned 5-10 minute, wherein, pH value is 5.3-6.0, the hole sealing agent solution temperature is controlled at 75-85
0C gets an anodic oxidation finished product after the oven dry;
6), rolling, obtain required mist silver color anode photoxidation recombining process product.
2. the continuity anode photoxidation recombining process of a kind of aluminum strip according to claim 1, it is characterized in that: when finished product needs grain effect, after unreeling, aluminum strip needs to process through drawing process, adopt mechanical system that aluminium is carried out grinding, after processing many moneys thickness grain effect different in size, water cleans and just carries out alkali cleaning silvery white technique or alkaline etching titanium silver process again.
3. the continuity anode photoxidation recombining process of a kind of aluminum strip according to claim 1, it is characterized in that: when needs increase color, after cleaning, the aluminium water after the anodic oxidation can not carry out hole-sealing technology, process and carry out nanometer coloured light oxidation closing process, after formation firmly has metalluster look thin film layer with al base sacrificial anode oxide film adhesive power, but just rolling obtains having the anode photoxidation recombining process product of multiple color.
4. the continuity anode photoxidation recombining process of a kind of aluminum strip according to claim 1, it is characterized in that: when needs increase the barrier propterty of mist silver color anode photoxidation recombining process product and secondary processing buckling performance, but the aluminium behind the hole-sealing technology need carry out photoxidation protection closing process process after just rolling.
5. the continuity anode photoxidation recombining process of a kind of aluminum strip according to claim 3, it is characterized in that: when needs increase the barrier propterty of anode photoxidation recombining process product and secondary processing buckling performance, but the aluminium after nanometer coloured light oxidation closing process is processed need carry out photoxidation protection closing process process after just rolling.
6. the continuity anode photoxidation recombining process of a kind of aluminum strip according to claim 3, it is characterized in that: the processing mode of described nanometer coloured light oxidation closing process is: will be by acrylic acid ester 35～45%, aqueous acrylic resin dispersion 8～10%, photocatalyst 5%, Tio2 nano level 2～3%, inorganic and organic dye and dispersible carrier mixture are 5-15%, water and alcohol mixture are the mixed solution uniform atomizing that forms of 25～40% proportionings after the anodic oxidation and on the aluminium material surface of water after cleaning, the pH value of mixed solution is 5.5-6.0, viscosity of mixed liquid＜18S, adsorption time through 10～20S, allow mixed solution permeate the oxidation hole, by photocatalysis principle the surface of aluminum plate mixed solution is carried out photoxidation 15-30 second, allow surperficial mixed solution harden, forming with al base sacrificial anode oxide film adhesive power firmly has metalluster look thin film layer.
7. the continuity anode photoxidation recombining process of a kind of aluminum strip according to claim 4, it is characterized in that: the processing mode of described photoxidation protection closing process is: will be by acrylic acid ester 35～45%, aqueous acrylic resin dispersion 8～10%, photocatalyst 5%, Tio2 nano level 2～3%, gas phase sio2 and tensio-active agent 5-15%, the mixed solution uniform atomizing that water and alcohol mixture 25～40% proportionings form is after processing through hole-sealing technology and on the aluminium material surface after the water cleaning, the pH value of mixed solution is 5.5-6.0, viscosity of mixed liquid＜18S, adsorption time through 10～20S, allow mixed solution permeate the oxidation hole, by photocatalysis principle the surface of aluminum plate mixed solution is carried out photoxidation 15-30 second, allow surperficial mixed solution harden, make aluminium reach required barrier propterty and secondary processing buckling performance.
8. the continuity anode photoxidation recombining process of a kind of aluminum strip according to claim 5, it is characterized in that: the processing mode of described photoxidation protection closing process is: will be by acrylic acid ester 35～45%, aqueous acrylic resin dispersion 8～10%, photocatalyst 5%, Tio2 nano level 2～3%, gas phase sio2 and tensio-active agent 5-15%, the mixed solution uniform atomizing that water and alcohol mixture 25～40% proportionings form is after processing through nanometer coloured light oxidation closing process and on the aluminium material surface after the water cleaning, the pH value of mixed solution is 5.5-6.0, viscosity of mixed liquid＜18S, adsorption time through 10～20S, allow mixed solution permeate the oxidation hole, by photocatalysis principle the surface of aluminum plate mixed solution is carried out photoxidation 15-30 second, allow surperficial mixed solution harden, make aluminium reach required barrier propterty and secondary processing buckling performance.
9. the continuity anode photoxidation recombining process of a kind of aluminum strip according to claim 1 is characterized in that: described high temperature hole sealing agent is for without the nickel metal-salt.
10. it is characterized in that according to claim 1 and 2 or the continuity anode photoxidation recombining process of 3 described a kind of aluminum strip: what adopt when water cleans between the technique is that purity is 95% pure water.
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| CN103334140B (en) * | 2013-06-19 | 2016-08-10 | 广东耀银山铝业有限公司 | The golden yellow dyeing of aluminium alloy anode oxide room temperature |
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| CN106947993A (en) * | 2017-03-27 | 2017-07-14 | 东莞智富五金制品有限公司 | A kind of noninductive light anodic process |
| CN108221018A (en) * | 2017-12-28 | 2018-06-29 | 中宥(平原)科技有限公司 | A kind of high-efficiency copper based on secondary heavy zinc covers aluminium technique |
| CN110359073A (en) * | 2019-07-06 | 2019-10-22 | 彭斌 | A kind of aluminium alloy anode oxide film hole sealing agent and its application method |
| CN113630967A (en) * | 2021-08-05 | 2021-11-09 | 恩达电路(深圳)有限公司 | Production process of black anode aluminum oxide-based circuit board |
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