CN105483791A - Surface machining method of industrial aluminum alloy sectional material - Google Patents
Surface machining method of industrial aluminum alloy sectional material Download PDFInfo
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- CN105483791A CN105483791A CN201510834919.5A CN201510834919A CN105483791A CN 105483791 A CN105483791 A CN 105483791A CN 201510834919 A CN201510834919 A CN 201510834919A CN 105483791 A CN105483791 A CN 105483791A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
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Abstract
The invention discloses a surface machining method of an industrial aluminum alloy sectional material. The surface machining method comprises: carrying out degreasing, alkali etching and acid pickling on the aluminum alloy sectional material so as to obtain a pre-treated aluminum alloy sectional material; carrying out anodic oxidation treatment on the pre-treated aluminum alloy sectional material so as to obtain an anodized aluminum alloy sectional material; dipping the anodized aluminum alloy sectional material in a softened water solution of metal salt, and electrolyzing so as to obtain a colored aluminum alloy sectional material, wherein in the softened water solution of metal salt, the concentration of H2SO4 is 12-15g/L, the concentration of NiSO4 is 35-40g/L, the concentration of tartaric acid is 3-10g/L, the concentration of a stabilizer is 1-5g/L, the concentration of SnSO4 is 7-10g/L, and the conductivity of the softened water is 2-30mus/cm; and after sealing holes in the colored aluminum alloy sectional material, obtaining a special aluminum alloy sectional material for a door/window. The surface machining method of the industrial aluminum alloy sectional material, provided by the invention, is simple in process and mild in conditions. The oxide film of the obtained aluminum alloy sectional material is high in hardness and great in corrosion resistance.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology, particularly relate to a kind of method of surface finish of industrial aluminium alloy extrusions.
Background technology
Because aluminium alloy has a lot of excellent physical and chemical performance, be therefore widely applied to the every field of national economy.When the surface of aluminium alloy exposes in an atmosphere, can at the very thin natural oxide film of its surface coverage one deck, but be easy to be corroded due to the natural oxide film on its surface, thus greatly reduce the work-ing life of aluminum alloy materials.Thus industry member adopts process for treating surface to improve the properties of aluminium alloy usually, as erosion resistance and surface mechanical properties etc.Along with the development of society, the performance of people to aluminium alloy is had higher requirement, and its performance of aluminium alloy that existing process for treating surface process obtains still exists a lot of deficiency in erosion resistance, hardness etc.
Summary of the invention
Based on the technical problem that background technology exists, the present invention proposes a kind of method of surface finish of industrial aluminium alloy extrusions, its process is simple, mild condition, the aluminium alloy extrusions hardness obtained is high, good corrosion resistance, the door and window long service life made with gained aluminium alloy.
The method of surface finish of a kind of industrial aluminium alloy extrusions that the present invention proposes, comprises the following steps:
S1, aluminium alloy extrusions is placed in grease-removing agent, 3-6min is soaked at 40-55 DEG C, be placed in alkaline etching solution with deionized water rinsing, 4-10min is soaked at 35-65 DEG C, being placed on pH value with deionized water rinsing is in the acid solution of 2.5-3,4-8min is soaked, with obtaining pre-treating aluminium alloy profile after deionized water rinsing at 30-45 DEG C;
S2, using pre-treating aluminium alloy profile as anode, fine aluminium, as negative electrode, carries out anodic oxidation treatment using sulfuric acid and tartaric mixed solution as ionogen and obtains aluminium oxide alloy section bar;
S3, by aluminium oxide alloy section bar immerse metal-salt soften aqueous solution in, temperature be 18-22 DEG C, voltage be the condition of 14-18V under electrolysis 0.5-6min obtain colored aluminum alloy section bar; Wherein, in the soften aqueous solution of metal-salt, H
2sO
4concentration be 12-15g/L, NiSO
4concentration be 35-40g/L, tartaric concentration is 3-10g/L, and the concentration of stablizer is 1-5g/L, SnSO
4concentration be 7-10g/L, softening electrical conductivity of water 2-30 μ s/cm used;
S4, colored aluminum alloy section bar is utilized demineralized water after put into hole sealing agent sealing of hole, washing, obtain described door and window Special aluminum alloy profile after drying.
Preferably, in S1, its raw material of described grease-removing agent comprises following component by weight: cocoanut fatty acid diethanolamide 5-10 part, Sodium dodecylbenzene sulfonate 2-5 part, sodium bicarbonate 10-20 part, Starso 2-5 part, trisodium phosphate 1-3 part, gluconic acid 2-3.5 part, diethylene triaminepentaacetic acid(DTPA) 1-2.5 part, acetylaminoacetic acid 0.1-0.8 part, oleic acid 0.1-0.8 part, ethanol 0.1-0.5 part, diisooctyl phosphoric acid ester 0.1-0.5 part, termil 0.05-0.2 part, 100 parts, water.
Preferably, in S1, its raw material of described grease-removing agent comprises following component by weight: cocoanut fatty acid diethanolamide 8 parts, Sodium dodecylbenzene sulfonate 3.5 parts, sodium bicarbonate 15 parts, Starso 3.2 parts, trisodium phosphate 2.2 parts, gluconic acid 3.1 parts, diethylene triaminepentaacetic acid(DTPA) 2 parts, acetylaminoacetic acid 0.6 part, oleic acid 0.5 part, ethanol 0.3 part, diisooctyl phosphoric acid ester 0.25 part, termil 0.1 part, 100 parts, water.
Preferably, in S1, described acid solution is the mixed solution of ammonium bifluoride and hydrofluoric acid composition.
Preferably, in S2, pre-treating aluminium alloy profile is placed in activation solution carries out activation treatment 20-30s as also comprising before anode by pre-treating aluminium alloy profile, described activation solution is the mixed aqueous solution of potassium permanganate, sulfuric acid, and the concentration of potassium permanganate is 1-4g/L, the concentration of sulfuric acid is 10-15g/L.
Preferably, in S2, in described ionogen, the concentration of sulfuric acid is 75-100g/L, and tartaric concentration is 30-50g/L.
Preferably, in S2, in anodic oxidation treatment process, anodised temperature is 19-21 DEG C, and the anodised time is 25-35min, and anodised voltage is 16-18V, and current density is 130-150A/m
2.
Preferably, in S3, in the soften aqueous solution of metal-salt, H
2sO
4concentration be 13.5g/L, NiSO
4concentration be 38g/L, tartaric concentration is 5.5g/L, and the concentration of stablizer is 2.8g/L, SnSO
4concentration be 8.5g/L, softening electrical conductivity of water 25 μ s/cm used.
Preferably, in S4, the pH value of described softening water is 6.5-7.5, specific conductivity≤1 μ s/cm.
Preferably, in S4, described hole sealing agent is the mixed solution of a kind of in lanthanum nitrate hexahydrate, sodium aluminate solution or two kinds.
In the method for surface finish of industrial aluminium alloy extrusions disclosed by the invention, by carrying out degreasing to the surface of aluminium alloy, alkaline etching, neutralization, anodic oxidation, painted and sealing pores, by regulating and controlling degreasing, alkaline etching, neutralization, anodic oxidation, processing parameter in painted and sealing of hole process, layer oxide film is covered in aluminum alloy surface, the surfacing of oxide film, even aperture distribution, hardness and excellent corrosion resistance, in optimal way, in skimming processes, in the raw material of grease-removing agent used, have selected cocoanut fatty acid diethanolamide, Sodium dodecylbenzene sulfonate carries out composite, makes it play synergy, wetting, dispersion effect is good, trisodium phosphate as inorganic metal sequestrant, gluconic acid, diethylene triaminepentaacetic acid(DTPA), sarcosine, oleic acid, as organo-metallic sequestrant, coordinates and adds in system, have synergy, to the emulsification of dirt with cocoanut fatty acid diethanolamide and Sodium dodecylbenzene sulfonate, dispersion, antiredeposition and solublization excellence, the ethanol added and diisooctyl phosphoric acid ester have synergy, enhance the soil removability of grease-removing agent, in system, froth breaking is made good use of simultaneously, there is excellent persistence, and few at aluminium alloy section surface residual ion, termil adds in system, give the germ resistance that grease-removing agent is certain, in sealing of hole process, have selected the mixed solution of a kind of in lanthanum nitrate hexahydrate, sodium aluminate solution or two kinds as hole sealing agent, after closing, the surface of aluminium alloy extrusions is closed, and prevents the intrusion of corroding ion, improve the erosion resistance of aluminium alloy extrusions, make erosion rate be reduced to 2.2 × 10
-8a/cm
2below.
Embodiment
Below, by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
The method of surface finish of a kind of industrial aluminium alloy extrusions that the present invention proposes, comprises the following steps:
S1, aluminium alloy extrusions is placed in grease-removing agent, 6min is soaked at 40 DEG C, be placed in alkaline etching solution with deionized water rinsing, 10min is soaked at 35 DEG C, being placed on pH value with deionized water rinsing is in the acid solution of 2.5,4min is soaked, with obtaining pre-treating aluminium alloy profile after deionized water rinsing at 45 DEG C;
S2, using pre-treating aluminium alloy profile as anode, fine aluminium, as negative electrode, carries out anodic oxidation treatment using sulfuric acid and tartaric mixed solution as ionogen and obtains aluminium oxide alloy section bar;
S3, by aluminium oxide alloy section bar immerse metal-salt soften aqueous solution in, temperature be 22 DEG C, voltage be the condition of 14V under electrolysis 6min obtain colored aluminum alloy section bar; Wherein, in the soften aqueous solution of metal-salt, H
2sO
4concentration be 12g/L, NiSO
4concentration be 40g/L, tartaric concentration is 3g/L, and the concentration of stablizer is 5g/L, SnSO
4concentration be 7g/L, softening electrical conductivity of water 30 μ s/cm used;
S4, colored aluminum alloy section bar is utilized demineralized water after put into hole sealing agent sealing of hole, washing, obtain described door and window Special aluminum alloy profile after drying.
Embodiment 2
The method of surface finish of a kind of industrial aluminium alloy extrusions that the present invention proposes, comprises the following steps:
S1, aluminium alloy extrusions is placed in grease-removing agent, 3min is soaked at 55 DEG C, be placed in alkaline etching solution with deionized water rinsing, 4min is soaked at 65 DEG C, being placed on pH value with deionized water rinsing is in the acid solution of 3,8min is soaked, with obtaining pre-treating aluminium alloy profile after deionized water rinsing at 30 DEG C;
S2, using pre-treating aluminium alloy profile as anode, fine aluminium, as negative electrode, carries out anodic oxidation treatment using sulfuric acid and tartaric mixed solution as ionogen and obtains aluminium oxide alloy section bar;
S3, by aluminium oxide alloy section bar immerse metal-salt soften aqueous solution in, temperature be 18 DEG C, voltage be the condition of 18V under electrolysis 0.5min obtain colored aluminum alloy section bar; Wherein, in the soften aqueous solution of metal-salt, H
2sO
4concentration be 15g/L, NiSO
4concentration be 35g/L, tartaric concentration is 10g/L, and the concentration of stablizer is 1g/L, SnSO
4concentration be 10g/L, softening electrical conductivity of water 2 μ s/cm used;
S4, colored aluminum alloy section bar is utilized demineralized water after put into hole sealing agent sealing of hole, washing, obtain described door and window Special aluminum alloy profile after drying.
Embodiment 3
The method of surface finish of a kind of industrial aluminium alloy extrusions that the present invention proposes, comprises the following steps:
S1, aluminium alloy extrusions is placed in grease-removing agent, 5min is soaked at 42 DEG C, be placed in alkaline etching solution with deionized water rinsing, 8min is soaked at 40 DEG C, being placed on pH value with deionized water rinsing is in the acid solution of 3,5min is soaked, with obtaining pre-treating aluminium alloy profile after deionized water rinsing at 42 DEG C; Its raw material of described grease-removing agent comprises following component by weight: cocoanut fatty acid diethanolamide 8 parts, Sodium dodecylbenzene sulfonate 3.5 parts, sodium bicarbonate 15 parts, Starso 3.2 parts, trisodium phosphate 2.2 parts, gluconic acid 3.1 parts, diethylene triaminepentaacetic acid(DTPA) 2 parts, acetylaminoacetic acid 0.6 part, oleic acid 0.5 part, ethanol 0.3 part, diisooctyl phosphoric acid ester 0.25 part, termil 0.1 part, 100 parts, water; Described acid solution is the mixed solution of ammonium bifluoride and hydrofluoric acid composition;
S2, pre-treating aluminium alloy profile is placed in activation solution carries out activation treatment 20s, described activation solution is the mixed aqueous solution of potassium permanganate, sulfuric acid, and the concentration of potassium permanganate is 4g/L, the concentration of sulfuric acid is 10g/L, then using activation after pre-treating aluminium alloy profile as anode, fine aluminium, as negative electrode, carries out anodic oxidation treatment using sulfuric acid and tartaric mixed solution as ionogen and obtains aluminium oxide alloy section bar; In described ionogen, the concentration of sulfuric acid is 75g/L, and tartaric concentration is 50g/L; In anodic oxidation treatment process, anodised temperature is 19 DEG C, and the anodised time is 35min, and anodised voltage is 16V, and current density is 150A/m
2;
S3, by aluminium oxide alloy section bar immerse metal-salt soften aqueous solution in, temperature be 19 DEG C, voltage be the condition of 17V under electrolysis 3min obtain colored aluminum alloy section bar; Wherein, in the soften aqueous solution of metal-salt, H
2sO
4concentration be 13.5g/L, NiSO
4concentration be 38g/L, tartaric concentration is 5.5g/L, and the concentration of stablizer is 2.8g/L, SnSO
4concentration be 8.5g/L, softening electrical conductivity of water 25 μ s/cm used;
S4, colored aluminum alloy section bar is utilized demineralized water after put into hole sealing agent sealing of hole, washing, obtain described door and window Special aluminum alloy profile after drying; Wherein, the pH value of described softening water is 7.5, specific conductivity≤1 μ s/cm; Described hole sealing agent is sodium aluminate solution.
Embodiment 4
The method of surface finish of a kind of industrial aluminium alloy extrusions that the present invention proposes, comprises the following steps:
S1, aluminium alloy extrusions is placed in grease-removing agent, 4min is soaked at 51 DEG C, be placed in alkaline etching solution with deionized water rinsing, 6min is soaked at 60 DEG C, being placed on pH value with deionized water rinsing is in the acid solution of 2.5,6min is soaked, with obtaining pre-treating aluminium alloy profile after deionized water rinsing at 36 DEG C;
S2, using pre-treating aluminium alloy profile as anode, fine aluminium, as negative electrode, carries out anodic oxidation treatment using sulfuric acid and tartaric mixed solution as ionogen and obtains aluminium oxide alloy section bar;
S3, by aluminium oxide alloy section bar immerse metal-salt soften aqueous solution in, temperature be 21 DEG C, voltage be the condition of 15V under electrolysis 5min obtain colored aluminum alloy section bar; Wherein, in the soften aqueous solution of metal-salt, H
2sO
4concentration be 13g/L, NiSO
4concentration be 39g/L, tartaric concentration is 5g/L, and the concentration of stablizer is 4g/L, SnSO
4concentration be 8g/L, softening electrical conductivity of water 25 μ s/cm used;
S4, colored aluminum alloy section bar is utilized demineralized water after put into hole sealing agent sealing of hole, washing, obtain described door and window Special aluminum alloy profile after drying;
Wherein, in S1, its raw material of described grease-removing agent comprises following component by weight: cocoanut fatty acid diethanolamide 5 parts, Sodium dodecylbenzene sulfonate 5 parts, sodium bicarbonate 10 parts, Starso 5 parts, trisodium phosphate 1 part, gluconic acid 3.5 parts, diethylene triaminepentaacetic acid(DTPA) 1 part, acetylaminoacetic acid 0.8 part, oleic acid 0.1 part, ethanol 0.5 part, diisooctyl phosphoric acid ester 0.1 part, termil 0.2 part, 100 parts, water;
In S2, pre-treating aluminium alloy profile is placed in activation solution carries out activation treatment 30s as also comprising before anode by pre-treating aluminium alloy profile, described activation solution is the mixed aqueous solution of potassium permanganate, sulfuric acid, and the concentration of potassium permanganate is 1g/L, and the concentration of sulfuric acid is 15g/L;
In S2, in described ionogen, the concentration of sulfuric acid is 100g/L, and tartaric concentration is 30g/L;
In S2, in anodic oxidation treatment process, anodised temperature is 21 DEG C, and the anodised time is 25min, and anodised voltage is 18V, and current density is 130A/m
2;
In S4, the pH value of described softening water is 6.5, specific conductivity≤1 μ s/cm;
In S4, described hole sealing agent is lanthanum nitrate hexahydrate.
Embodiment 5
The method of surface finish of a kind of industrial aluminium alloy extrusions that the present invention proposes, comprises the following steps:
S1, aluminium alloy extrusions is placed in grease-removing agent, 5.5min is soaked at 50 DEG C, be placed in alkaline etching solution with deionized water rinsing, 7min is soaked at 50 DEG C, being placed on pH value with deionized water rinsing is in the acid solution of 2.8,6min is soaked, with obtaining pre-treating aluminium alloy profile after deionized water rinsing at 38 DEG C;
S2, using pre-treating aluminium alloy profile as anode, fine aluminium, as negative electrode, carries out anodic oxidation treatment using sulfuric acid and tartaric mixed solution as ionogen and obtains aluminium oxide alloy section bar;
S3, by aluminium oxide alloy section bar immerse metal-salt soften aqueous solution in, temperature be 20 DEG C, voltage be the condition of 15V under electrolysis 5min obtain colored aluminum alloy section bar; Wherein, in the soften aqueous solution of metal-salt, H
2sO
4concentration be 14g/L, NiSO
4concentration be 38g/L, tartaric concentration is 7g/L, and the concentration of stablizer is 3.2g/L, SnSO
4concentration be 8.5g/L, softening electrical conductivity of water 20 μ s/cm used;
S4, colored aluminum alloy section bar is utilized demineralized water after put into hole sealing agent sealing of hole, washing, obtain described door and window Special aluminum alloy profile after drying;
Wherein, in S1, its raw material of described grease-removing agent comprises following component by weight: cocoanut fatty acid diethanolamide 10 parts, Sodium dodecylbenzene sulfonate 2 parts, sodium bicarbonate 20 parts, Starso 2 parts, trisodium phosphate 3 parts, gluconic acid 2 parts, diethylene triaminepentaacetic acid(DTPA) 2.5 parts, acetylaminoacetic acid 0.1 part, oleic acid 0.8 part, ethanol 0.1 part, diisooctyl phosphoric acid ester 0.5 part, termil 0.05 part, 100 parts, water;
In S2, pre-treating aluminium alloy profile is placed in activation solution carries out activation treatment 26s as also comprising before anode by pre-treating aluminium alloy profile, described activation solution is the mixed aqueous solution of potassium permanganate, sulfuric acid, and the concentration of potassium permanganate is 3.2g/L, and the concentration of sulfuric acid is 12g/L;
In S2, in described ionogen, the concentration of sulfuric acid is 86g/L, and tartaric concentration is 43g/L;
In S2, in anodic oxidation treatment process, anodised temperature is 20 DEG C, and the anodised time is 32min, and anodised voltage is 17V, and current density is 140A/m
2;
In S4, the pH value of described softening water is 7, specific conductivity≤1 μ s/cm;
In S4, described hole sealing agent is the mixed solution of lanthanum nitrate hexahydrate, sodium aluminate solution.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. a method of surface finish for industrial aluminium alloy extrusions, is characterized in that, comprises the following steps:
S1, aluminium alloy extrusions is placed in grease-removing agent, 3-6min is soaked at 40-55 DEG C, be placed in alkaline etching solution with deionized water rinsing, 4-10min is soaked at 35-65 DEG C, being placed on pH value with deionized water rinsing is in the acid solution of 2.5-3,4-8min is soaked, with obtaining pre-treating aluminium alloy profile after deionized water rinsing at 30-45 DEG C;
S2, using pre-treating aluminium alloy profile as anode, fine aluminium, as negative electrode, carries out anodic oxidation treatment using sulfuric acid and tartaric mixed solution as ionogen and obtains aluminium oxide alloy section bar;
S3, by aluminium oxide alloy section bar immerse metal-salt soften aqueous solution in, temperature be 18-22 DEG C, voltage be the condition of 14-18V under electrolysis 0.5-6min obtain colored aluminum alloy section bar; Wherein, in the soften aqueous solution of metal-salt, H
2sO
4concentration be 12-15g/L, NiSO
4concentration be 35-40g/L, tartaric concentration is 3-10g/L, and the concentration of stablizer is 1-5g/L, SnSO
4concentration be 7-10g/L, softening electrical conductivity of water 2-30 μ s/cm used;
S4, colored aluminum alloy section bar is utilized demineralized water after put into hole sealing agent sealing of hole, washing, obtain described door and window Special aluminum alloy profile after drying.
2. the method for surface finish of industrial aluminium alloy extrusions according to claim 1, it is characterized in that, in S1, its raw material of described grease-removing agent comprises following component by weight: cocoanut fatty acid diethanolamide 5-10 part, Sodium dodecylbenzene sulfonate 2-5 part, sodium bicarbonate 10-20 part, Starso 2-5 part, trisodium phosphate 1-3 part, gluconic acid 2-3.5 part, diethylene triaminepentaacetic acid(DTPA) 1-2.5 part, acetylaminoacetic acid 0.1-0.8 part, oleic acid 0.1-0.8 part, ethanol 0.1-0.5 part, diisooctyl phosphoric acid ester 0.1-0.5 part, termil 0.05-0.2 part, 100 parts, water.
3. the method for surface finish of industrial aluminium alloy extrusions according to claim 1 or 2, it is characterized in that, in S1, its raw material of described grease-removing agent comprises following component by weight: cocoanut fatty acid diethanolamide 8 parts, Sodium dodecylbenzene sulfonate 3.5 parts, sodium bicarbonate 15 parts, Starso 3.2 parts, trisodium phosphate 2.2 parts, gluconic acid 3.1 parts, diethylene triaminepentaacetic acid(DTPA) 2 parts, acetylaminoacetic acid 0.6 part, oleic acid 0.5 part, ethanol 0.3 part, diisooctyl phosphoric acid ester 0.25 part, termil 0.1 part, 100 parts, water.
4. the method for surface finish of industrial aluminium alloy extrusions according to any one of claim 1-3, is characterized in that, in S1, described acid solution is the mixed solution of ammonium bifluoride and hydrofluoric acid composition.
5. the method for surface finish of industrial aluminium alloy extrusions according to any one of claim 1-4, it is characterized in that, in S2, pre-treating aluminium alloy profile is placed in activation solution carries out activation treatment 20-30s as also comprising before anode by pre-treating aluminium alloy profile, described activation solution is the mixed aqueous solution of potassium permanganate, sulfuric acid, and the concentration of potassium permanganate is 1-4g/L, the concentration of sulfuric acid is 10-15g/L.
6. the method for surface finish of industrial aluminium alloy extrusions according to any one of claim 1-5, it is characterized in that, in S2, in described ionogen, the concentration of sulfuric acid is 75-100g/L, and tartaric concentration is 30-50g/L.
7. the method for surface finish of industrial aluminium alloy extrusions according to any one of claim 1-6, it is characterized in that, in S2, in anodic oxidation treatment process, anodised temperature is 19-21 DEG C, the anodised time is 25-35min, and anodised voltage is 16-18V, and current density is 130-150A/m
2.
8. the method for surface finish of industrial aluminium alloy extrusions according to any one of claim 1-7, is characterized in that, in S3, in the soften aqueous solution of metal-salt, and H
2sO
4concentration be 13.5g/L, NiSO
4concentration be 38g/L, tartaric concentration is 5.5g/L, and the concentration of stablizer is 2.8g/L, SnSO
4concentration be 8.5g/L, softening electrical conductivity of water 25 μ s/cm used.
9. the method for surface finish of industrial aluminium alloy extrusions according to any one of claim 1-8, it is characterized in that, in S4, the pH value of described softening water is 6.5-7.5, specific conductivity≤1 μ s/cm.
10. the method for surface finish of industrial aluminium alloy extrusions according to any one of claim 1-9, is characterized in that, in S4, described hole sealing agent is the mixed solution of a kind of in lanthanum nitrate hexahydrate, sodium aluminate solution or two kinds.
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| CN107904647A (en) * | 2017-11-30 | 2018-04-13 | 北京石油化工学院 | A kind of Micro-arc Oxidized Ceramic Coatings on Magnesium Alloy hole sealing agent and method for sealing |
| CN111448343A (en) * | 2017-12-12 | 2020-07-24 | 海德鲁铝业钢材有限公司 | Corrosion method for profiles, rolled strips and plates made of aluminium alloy |
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| CN108018590B (en) * | 2018-03-19 | 2019-06-25 | 福建奋安铝业有限公司 | A kind of aluminium shape surface treatment process |
| CN108707942A (en) * | 2018-05-30 | 2018-10-26 | 江苏和兴汽车科技有限公司 | A kind of technique of aluminium alloy black anodizing electrophoresis |
| CN110965104A (en) * | 2019-11-18 | 2020-04-07 | 重庆理工大学 | Normal-temperature sealing treatment method for Al-Cu-Li alloy anodic oxide film |
| CN110965104B (en) * | 2019-11-18 | 2021-07-23 | 重庆理工大学 | Normal-temperature sealing treatment method for Al-Cu-Li alloy anodic oxide film |
| CN111304666A (en) * | 2020-03-09 | 2020-06-19 | 福建新峰科技有限公司 | Surface treatment process for aluminum product with strong acid resistance, strong alkali resistance and high wear resistance |
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