CN102433578A - Agent for treatment before aluminum alloy secondary anode oxidation screen printing and aluminum alloy secondary anode oxidation technology - Google Patents
Agent for treatment before aluminum alloy secondary anode oxidation screen printing and aluminum alloy secondary anode oxidation technology Download PDFInfo
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- CN102433578A CN102433578A CN2011103839664A CN201110383966A CN102433578A CN 102433578 A CN102433578 A CN 102433578A CN 2011103839664 A CN2011103839664 A CN 2011103839664A CN 201110383966 A CN201110383966 A CN 201110383966A CN 102433578 A CN102433578 A CN 102433578A
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Abstract
The invention discloses an agent for treatment before aluminum alloy secondary anode oxidation screen printing, which is characterized in that each kilo of treatment agent solution contains the following raw materials by weight: 0.02-0.08g of cobalt salt, 0.01-0.08g of titanium salt, 0.01-0.20g of accelerating agent, 0.01-0.20g of silane and remaining weight of water. The invention additionally discloses an aluminum alloy secondary anode oxidation technology, which comprises the steps of cleaning, primary alkali etching, primary neutralization, primary anode oxidation, primary organic salt closing, treatment by using the treatment agent and screen printing of anticorrosive ink; and secondary alkali etching, second neutralization, secondary anode oxidation and the like. The treatment agent disclosed by the invention can form a reactive conversion layer on an aluminum material, the conversion layer can effectively resist the penetration of water and oxides and provide excellent anticorrosive performance, the adhesiveness of a coating layer to ink, coating and the like can be improved, and the situation that the ink falls off or corrosion pits are generated in the subsequent treatment process is avoided.
Description
Technical field
The present invention relates to a kind of preceding treatment agent of duraluminum two-step anodization silk-screen that is used for, the invention still further relates to this treatment agent of a kind of usefulness duraluminum is carried out aluminium alloy treated secondary oxidation technology.
Background technology
Along with the widespread use of aluminium alloy anode oxide technology and constantly development; Al-alloy products is for increasing the decorative effect of its outward appearance; Usually decoratively anodizing and silk-screen printing technique are combined aluminum alloy surface is carried out comprehensive treating process, particularly repeatedly dyeing to handle through two-step anodization to form the machicolated form pattern, is rich in stereoscopic sensation; Decorative effect is fine, or application UV coating etc. again after the anodic oxidation sealing.In the process of implementing the prior art scheme, the applicant finds that there is following problem in above-mentioned prior art: for guaranteeing printing ink or ADHESION OF PAINTS property, all adopt semiclosed mode after the anodic oxidation of duraluminum now; Though the off-period of this mode is short; Be generally 2-5min, can improve production rate, in big production, can not guarantee but the shortcoming of this treatment process is the tack of coating; And because sealing is incomplete, The comprehensive performance also receives very big influence.For this reason, be necessary the processing after the anodic oxidation is improved, improve whole performance.
Summary of the invention
An object of the present invention is to provide a kind of preceding treatment agent of duraluminum two-step anodization silk-screen that is used for, to improve the silk-screen surface property after the anodic oxidation one time.
Another object of the present invention is that duraluminum carries out aluminium alloy treated secondary oxidation technology after will providing this treatment agent of a kind of usefulness to an anodic oxidation.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of treatment agent that is used for before the duraluminum two-step anodization silk-screen is characterized in that: the raw material that includes following weight in every kilogram of treatment agent solution: cobalt salt 0.02-0.08g, titanium salt 0.01-0.08g, promotor 0.01-0.20g, silane 0.01-0.20g, surplus are water.
Said cobalt salt can be rose vitriol, Cobaltous diacetate, Xiao Suangu or cobaltous carbonate.
Said titanium salt can be fluotitanate, titanium tetrachloride, titanic acid ester, titanium sulfate or Titanium Nitrate.
Said promotor can be hydrofluoric acid, matt salt, Neutral ammonium fluoride, Sodium Fluoride or silicofluoric acid.
Said silane can be epoxy radicals silicone hydride, amino silane compounds, fluoroalkyl silanes, vinyl silanes, alkyl silane or aromatic base silane.
Wherein, epoxy radicals silicone hydride can adopt 3-glycidyl ether oxygen propyl trimethyl silane, Polyetherfunctional group's triethoxyl silane or gamma-methyl allyl acyloxypropyl trimethyl silane; Amino silane compounds can adopt 3-aminopropyl triethyl silicane, N-aminoethyl-3-aminopropyl trimethoxysilane or 2-aminoethyl-3-aminopropyl methyl dimethoxysilane; Fluoroalkyl silanes can adopt ten trifluoro octyltri-ethoxysilane, fluoroalkyl silane or modification fluoroalkyl siloxanes; Vinyl silanes is vinyl trichloro silane or vinyltriethoxysilane; Alkyl silane can adopt hexadecyl Trimethoxy silane, isobutyl-triethoxyl silane or octyltri-ethoxysilane; Aromatic base silane can adopt phenyltrimethoxysila,e or the like.
A kind of duraluminum two-step anodization technology provided by the invention is characterized in that: it comprises the steps: (1) cleaning, to remove the greasy dirt of aluminium material surface; (2) alkali loses for the first time, and to remove the natural sull of aluminium material surface, said alkali erosion tank liquor adopts the solution 40-60g/l of sodium hydroxide, inhibiter and complexing agent, corrodes 30-120s down at 40-60 ℃; (3) neutralization for the first time is used to remove aluminium material surface ash shape thing, spot and sull, and aluminium is put into 10-30%HNO
3Solution is in 10-35 ℃ and 10-120s; (4) anodic oxidation for the first time, the cell liquid of employing is the 150-250g/l sulphuric acid soln, temperature 18-22 ℃, current density 1.0-2.5A/dm
2, oxidation 15-40min; (5) inorganic salt sealing is for the first time flooded 10-30min, pH value 5.3-5.8, temperature 75-85 ℃ in 5-10g/l nickelous acetate encapsulant solution; (6) treatment agent is handled; At 10-35 ℃; In treatment agent, flood 10-120s under the pH value 2.5-3.3 condition; Wherein, the raw material that includes following weight in every kilogram of treatment agent solution: cobalt salt 0.02-0.08g, titanium salt 0.01-0.08g, promotor 0.01-0.20g, silane 0.01-0.20g, surplus are water; (7) the corrosion-resistant printing ink of silk-screen; (8) alkali loses for the second time, and to remove the aluminium material surface sull, said alkali erosion tank liquor adopts the solution 40-60g/l of sodium hydroxide, inhibiter and complexing agent, corrodes 30-120s down at 40-60 ℃; (9) neutralization for the second time is used to remove aluminium material surface ash shape thing, spot and sull, and aluminium is put into 10-30%HNO
3Solution is in 10-35 ℃ and 10-120s; (10) anodic oxidation for the second time, the cell liquid of employing is the 150-250g/l sulphuric acid soln, temperature 18-22 ℃, current density 1.0-2.5A/dm
2, oxidation 15-40min; (11) inorganic salt sealing for the second time; The multi-hole type sull that anodic oxidation is generated seals with nickelous acetate, in 5-10g/l nickelous acetate encapsulant solution, floods 10-30min, pH value 5.3-5.8; Temperature 75-85 ℃, promptly obtain through the two-step anodization aluminium alloy treated.
Above-mentioned alkali erosion tank liquor and electrolytic solution can adopt the proportioning in the traditional technology.
In order to obtain best surface treatment effect, water cleans up between each process step.After the anodic oxidation of secondary, also can add painted processing.
The invention has the beneficial effects as follows: treatment agent of the present invention; Can on aluminium, form reactive conversion coating; This conversion coating can effectively be resisted soaking into of water and oxide compound; Excellent solidity to corrosion is provided, also can improves the tack of coating simultaneously, prevent coming off or produce the corrosion pit phenomenon through printing ink in the subsequent processes to printing ink, coating etc.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is that the present invention uses technological process of production figure.
Embodiment
Embodiment 1
The preparation of treatment agent: take by weighing following raw material:
Rose vitriol 0.025g
Fluotitanate 0.070g
Hydrofluoric acid 0.200g
3-aminopropyl nitrilotriacetic silane 0.010g
Water 999.695g
Mentioned component is added respectively in the entry in order, stir and promptly obtain the treatment agent before 1 ㎏ is used for duraluminum two-step anodization silk-screen up to whole dissolvings.
Embodiment 2
The preparation of treatment agent: take by weighing following raw material:
Cobaltous diacetate 0.020g
Titanium tetrachloride 0.080g
Matt salt 0.150g
Ten trifluoro octyltri-ethoxysilane 0.015g
Water 999.6g
Mentioned component is added respectively in the entry in order, stir and promptly obtain the treatment agent before 1 ㎏ is used for duraluminum two-step anodization silk-screen up to whole dissolvings.
Embodiment 3
The preparation of treatment agent: take by weighing following raw material:
Xiao Suangu 0.03g
Titanium sulfate 0.060g
Neutral ammonium fluoride 0.100g
Hexadecyl Trimethoxy silane 0.050g
Water 999.76g
Mentioned component is added respectively in the entry in order, stir and promptly obtain the treatment agent before 1 ㎏ is used for duraluminum two-step anodization silk-screen up to whole dissolvings.
Embodiment 4
Cobaltous diacetate 0.06g
Titanic acid ester 0.03g
Matt salt 0.15g
3-glycidyl ether oxygen propyl trimethoxy silicane 0.15g
Water 999.61g
Mentioned component is added respectively in the entry in order, stir and promptly obtain the treatment agent before 1 ㎏ is used for duraluminum two-step anodization silk-screen up to whole dissolvings.
Embodiment 5
Xiao Suangu 0.07g
Titanium Nitrate 0.04g
Sodium Fluoride 0.15g
Vinyl trichloro silane 0.20g
Water 999.54g
Mentioned component is added respectively in the entry in order, stir and promptly obtain the treatment agent before 1 ㎏ is used for duraluminum two-step anodization silk-screen up to whole dissolvings.
Embodiment 6
Cobaltous carbonate 0.08g
Titanium Nitrate 0.01g
Silicofluoric acid 0.2g
3-aminopropyl triethyl silicane 0.20g
Water 999.51g
Mentioned component is added respectively in the entry in order, stir and promptly obtain the treatment agent before 1 ㎏ is used for duraluminum two-step anodization silk-screen up to whole dissolvings.
Embodiment 7
(1) clean, to remove the greasy dirt of aluminium material surface, scavenging solution can adopt this area material commonly used; (2) alkali loses for the first time, and to remove the natural sull of aluminium material surface, said alkali erosion tank liquor adopts the solution 40-60g/l of sodium hydroxide, inhibiter and complexing agent, corrodes 30-120s down at 40-60 ℃; (3) neutralization for the first time is used to remove aluminium material surface ash shape thing, spot and sull, and aluminium is put into 10-30%HNO
3Solution is in 10-35 ℃ and 10-120s; (4) anodic oxidation for the first time, the cell liquid of employing is the 150-250g/l sulphuric acid soln, temperature 18-22 ℃, current density 1.0-2.5A/dm
2, oxidation 15-40min; (5) inorganic salt sealing is for the first time flooded 10-30min, pH value 5.3-5.8, temperature 75-85 ℃ in 5-10g/l nickelous acetate encapsulant solution; (6) treatment agent is handled, and at 10-35 ℃, in the treatment agent of embodiment 1 preparation, is flooding 10-120s under the pH value 2.5-3.3 condition; (7) the corrosion-resistant printing ink of silk-screen; (8) alkali loses for the second time, and to remove the aluminium material surface sull, said alkali erosion tank liquor adopts the solution 40-60g/l of sodium hydroxide, inhibiter and complexing agent, corrodes 30-120s down at 40-60 ℃; (9) neutralization for the second time is used to remove aluminium material surface ash shape thing, spot and sull, and aluminium is put into 10-30%HNO
3Solution is in 10-35 ℃ and 10-120s; (10) anodic oxidation for the second time, the cell liquid of employing is the 150-250g/l sulphuric acid soln, temperature 18-22 ℃, current density 1.0-2.5A/dm
2, oxidation 15-40min; (11) inorganic salt sealing for the second time; The multi-hole type sull that anodic oxidation is generated seals with nickelous acetate, in 5-10g/l nickelous acetate encapsulant solution, floods 10-30min, pH value 5.3-5.8; Temperature 75-85 ℃, promptly obtain through the two-step anodization aluminium alloy treated.
Embodiment 8
(1) clean, to remove the greasy dirt of aluminium material surface, scavenging solution can adopt this area material commonly used; (2) alkali loses for the first time, and to remove the natural sull of aluminium material surface, said alkali erosion tank liquor adopts the solution 40-60g/l of sodium hydroxide, inhibiter and complexing agent, corrodes 30-120s down at 40-60 ℃; (3) neutralization for the first time is used to remove aluminium material surface ash shape thing, spot and sull, and aluminium is put into 10-30%HNO
3Solution is in 10-35 ℃ and 10-120s; (4) anodic oxidation for the first time, the cell liquid of employing is the 150-250g/l sulphuric acid soln, temperature 18-22 ℃, current density 1.0-2.5A/dm
2, oxidation 15-40min; (5) inorganic salt sealing is for the first time flooded 10-30min, pH value 5.3-5.8, temperature 75-85 ℃ in 5-10g/l nickelous acetate encapsulant solution; (6) treatment agent is handled, and at 10-35 ℃, in the treatment agent of embodiment 3 preparations, is flooding 10-120s under the pH value 2.5-3.3 condition; (7) the corrosion-resistant printing ink of silk-screen; (8) alkali loses for the second time, and to remove the aluminium material surface sull, said alkali erosion tank liquor adopts the solution 40-60g/l of sodium hydroxide, inhibiter and complexing agent, corrodes 30-120s down at 40-60 ℃; (9) neutralization for the second time is used to remove aluminium material surface ash shape thing, spot and sull, and aluminium is put into 10-30%HNO
3Solution is in 10-35 ℃ and 10-120s; (10) anodic oxidation for the second time, the cell liquid of employing is the 150-250g/l sulphuric acid soln, temperature 18-22 ℃, current density 1.0-2.5A/dm
2, oxidation 15-40min; (11) inorganic salt sealing for the second time; The multi-hole type sull that anodic oxidation is generated seals with nickelous acetate, in 5-10g/l nickelous acetate encapsulant solution, floods 10-30min, pH value 5.3-5.8; Temperature 75-85 ℃, promptly obtain through the two-step anodization aluminium alloy treated.
Embodiment 9
(1) cleaning, is base with sulfuric acid or nitric acid, adds a small amount of wetting agent and emulsifying agent,
Temperature is controlled at 45-55 ℃; (2) alkali erosion for the first time, the composition of alkali cleaning agent: sodium hydroxide 40-55g/l, alkali cleaning additive 10-15g/l; Handle 30-60s down at 40-55 ℃; (3) chemical rightenning, the composition nitric acid 30-80g/l of polishing fluid, phosphoric acid 750-800g/l, sulfuric acid 50g/l handles 30-150s under 90-110 ℃ of temperature, and (4) are neutralization for the first time, with 100-150ml/l nitric acid or the neutralization of potassium permanganate 5-10% solution; (5) anodic oxidation for the first time; Being anode oxidation groove liquid with the aluminium is connected to the positive pole of oxidation power supply as anode, makes aluminium material surface form the sull of multi-hole type, oxidizing condition: sulfuric acid 150-220 ℃ under the alive outside effect; Temperature 18-22 ℃, current density 1.2-1.4A/dm
2, oxidation 10-20min; (6) dyeing is in the fenestra of aluminum anodized film, to carry out, and requires rete to have enough porositys on the one hand, requires the fenestra inwall to keep certain activity on the other hand.The tone that electrolytic coloring obtains is dull, uses the method for dyeing can satisfy ornamental requirement; (7) inorganic salt sealing for the first time, the multi-hole type sull that anodic oxidation is generated seals with nickelous acetate, in 5-7g/l nickelous acetate encapsulant solution, floods 15-30min, pH value 5.3-5.8, temperature 80-85 ℃; (8) treatment agent is handled, and at 10-35 ℃, in the treatment agent of embodiment 6 preparations, is flooding 10-120s under the pH value 2.5-3.3 condition; (9) the corrosion-resistant printing ink of silk-screen; (8) alkali erosion for the second time, the composition of alkali cleaning agent: sodium hydroxide 40-55g/l, alkali cleaning additive 10-15g/l; Handle 30-60s down at 40-55 ℃; (9) chemical rightenning, the composition nitric acid 30-80g/l of polishing fluid, phosphoric acid 750-800g/l, sulfuric acid 50g/l handles 30-150s under 90-110 ℃ of temperature, and (10) are neutralization for the second time, with 100-150ml/l nitric acid or the neutralization of potassium permanganate 5-10% solution; (11) anodic oxidation for the second time; Being anode oxidation groove liquid with the aluminium is connected to the positive pole of oxidation power supply as anode, makes aluminium material surface form the sull of multi-hole type, oxidizing condition: sulfuric acid 150-220 ℃ under the alive outside effect; Temperature 18-22 ℃, current density 1.2-1.4A/dm
2, oxidation 10-20min; (12) dyeing is in the fenestra of aluminum anodized film, to carry out, and requires rete to have enough porositys on the one hand, requires the fenestra inwall to keep certain activity on the other hand.The tone that electrolytic coloring obtains is dull, uses the method for dyeing can satisfy ornamental requirement; (13) inorganic salt sealing for the second time, the multi-hole type sull that anodic oxidation is generated seals with nickelous acetate, in 5-7g/l nickelous acetate encapsulant solution, floods 15-30min, pH value 5.3-5.8, temperature 80-85 ℃; Last again cleaning promptly obtains through the two-step anodization aluminium alloy treated.
Several kinds of embodiment that above-mentioned just the present invention enumerates; It is not the exhaustive of the specific embodiment of the invention; Cobalt salt, titanium salt, promotor and the silane that the present invention adopts can also adopt other and the allied substances replacement of enumerating in the technical scheme; As long as it reaches technique effect of the present invention with essentially identical means, all should belong to protection scope of the present invention.
Claims (7)
1. treatment agent that is used for before the duraluminum two-step anodization silk-screen is characterized in that: the raw material that includes following weight in every kilogram of treatment agent solution: cobalt salt 0.02-0.08g, titanium salt 0.01-0.08g, promotor 0.01-0.20g, silane 0.01-0.20g, surplus are water.
2. a kind of preceding treatment agent of duraluminum two-step anodization silk-screen that is used for according to claim 1 is characterized in that said cobalt salt is rose vitriol, Cobaltous diacetate, Xiao Suangu or cobaltous carbonate.
3. a kind of preceding treatment agent of duraluminum two-step anodization silk-screen that is used for according to claim 1 is characterized in that said titanium salt is fluotitanate, titanium tetrachloride, titanic acid ester, titanium sulfate or Titanium Nitrate.
4. a kind of preceding treatment agent of duraluminum two-step anodization silk-screen that is used for according to claim 1 is characterized in that said promotor is hydrofluoric acid, matt salt, Neutral ammonium fluoride, Sodium Fluoride or silicofluoric acid.
5. a kind of preceding treatment agent of duraluminum two-step anodization silk-screen that is used for according to claim 1 is characterized in that said silane is epoxy radicals silicone hydride, amino silane compounds, fluoroalkyl silanes, vinyl silanes, alkyl silane or aromatic base silane.
6. a kind of preceding treatment agent of duraluminum two-step anodization silk-screen that is used for according to claim 5 is characterized in that epoxy radicals silicone hydride is 3-glycidyl ether oxygen propyl trimethyl silane, Polyetherfunctional group's triethoxyl silane or gamma-methyl allyl acyloxypropyl trimethyl silane; Amino silane compounds is 3-aminopropyl triethyl silicane, N-aminoethyl-3-aminopropyl trimethoxysilane or 2-aminoethyl-3-aminopropyl methyl dimethoxysilane; Fluoroalkyl silanes is ten trifluoro octyltri-ethoxysilane, fluoroalkyl silane or modification fluoroalkyl siloxanes; Vinyl silanes is vinyl trichloro silane or vinyltriethoxysilane; Alkyl silane is hexadecyl Trimethoxy silane, isobutyl-triethoxyl silane or octyltri-ethoxysilane; Aromatic base silane is phenyltrimethoxysila,e.
7. duraluminum two-step anodization technology is characterized in that: it comprises the steps: that (1) clean, to remove the greasy dirt of aluminium material surface; (2) alkali loses for the first time, and to remove the natural sull of aluminium material surface, said alkali erosion tank liquor adopts the solution 40-60g/l of sodium hydroxide, inhibiter and complexing agent, corrodes 30-120s down at 40-60 ℃; (3) neutralization for the first time is used to remove aluminium material surface ash shape thing, spot and sull, and aluminium is put into 10-30%HNO
3Solution is in 10-35 ℃ and 10-120s; (4) anodic oxidation for the first time, the cell liquid of employing is the 150-250g/l sulphuric acid soln, temperature 18-22 ℃, current density 1.0-2.5A/dm
2, oxidation 15-40min; (5) inorganic salt sealing is for the first time flooded 10-30min, pH value 5.3-5.8, temperature 75-85 ℃ in 5-10g/l nickelous acetate encapsulant solution; (6) treatment agent is handled; At 10-35 ℃; In treatment agent, flood 10-120s under the pH value 2.5-3.3 condition; Wherein, the raw material that includes following weight in every kilogram of treatment agent solution: cobalt salt 0.02-0.08g, titanium salt 0.01-0.08g, promotor 0.01-0.20g, silane 0.01-0.20g, surplus are water; (7) the corrosion-resistant printing ink of silk-screen; (8) alkali loses for the second time, and to remove the aluminium material surface sull, said alkali erosion tank liquor adopts the solution 40-60g/l of sodium hydroxide, inhibiter and complexing agent, corrodes 30-120s down at 40-60 ℃; (9) neutralization for the second time is used to remove aluminium material surface ash shape thing, spot and sull, and aluminium is put into 10-30%HNO
3Solution is in 10-35 ℃ and 10-120s; (10) anodic oxidation for the second time, the cell liquid of employing is the 150-250g/l sulphuric acid soln, temperature 18-22 ℃, current density 1.0-2.5A/dm
2, oxidation 15-40min; (11) inorganic salt sealing for the second time; The multi-hole type sull that anodic oxidation is generated seals with nickelous acetate, in 5-10g/l nickelous acetate encapsulant solution, floods 10-30min, pH value 5.3-5.8; Temperature 75-85 ℃, promptly obtain through the two-step anodization aluminium alloy treated.
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