CN107299347A - Surface treatment process of aluminum alloy section for doors and windows - Google Patents
Surface treatment process of aluminum alloy section for doors and windows Download PDFInfo
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- CN107299347A CN107299347A CN201710565159.1A CN201710565159A CN107299347A CN 107299347 A CN107299347 A CN 107299347A CN 201710565159 A CN201710565159 A CN 201710565159A CN 107299347 A CN107299347 A CN 107299347A
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- China
- Prior art keywords
- aluminium alloy
- alloy extrusions
- surface treatment
- section bar
- door
- Prior art date
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004381 surface treatment Methods 0.000 title claims abstract description 22
- 230000004224 protection Effects 0.000 claims abstract description 26
- 238000005498 polishing Methods 0.000 claims abstract description 25
- 239000000126 substance Substances 0.000 claims abstract description 21
- 238000001125 extrusion Methods 0.000 claims description 41
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 35
- 229910052782 aluminium Inorganic materials 0.000 claims description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 28
- 238000005260 corrosion Methods 0.000 claims description 26
- 239000004411 aluminium Substances 0.000 claims description 23
- 230000003647 oxidation Effects 0.000 claims description 23
- 238000007254 oxidation reaction Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 23
- 238000005491 wire drawing Methods 0.000 claims description 21
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- 239000003973 paint Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 238000005868 electrolysis reaction Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 5
- 229910052738 indium Inorganic materials 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 5
- 229940078494 nickel acetate Drugs 0.000 claims description 5
- 238000001259 photo etching Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000002932 luster Substances 0.000 abstract description 15
- 238000007743 anodising Methods 0.000 abstract 1
- 238000005536 corrosion prevention Methods 0.000 abstract 1
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 238000010422 painting Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000006750 UV protection Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000001962 electrophoresis Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/02—Light metals
- C23F3/03—Light metals with acidic solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- 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
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
-
- 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
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Wing Frames And Configurations (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a surface treatment process of an aluminum alloy section for doors and windows, which comprises the following steps: a. removing oil; b. drawing wires; c. chemical polishing; d. anodizing; e. and (5) corrosion prevention and protection. The aluminum alloy section treated by the aluminum alloy section surface treatment process for doors and windows has the advantages of high hardness and strength of the surface, bright color and luster, and long retention time.
Description
Technical field
The present invention relates to metal door and window technical field, and in particular to a kind of surface treatment work of door and window aluminium alloy extrusions
Skill.
Background technology
Aluminium is face-centred cubic structure, therefore with very high plasticity, it is easy to processed, with preferable electric conductivity, thermal conductivity and
Corrosion resistance etc., but the intensity of fine aluminium is very low, accordingly, it would be desirable to could be used by alloying as structural material.Aluminium alloy density
It is low, but intensity is higher, and plasticity is good, can be processed into various section bars, with excellent electric conductivity, thermal conductivity and corrosion resistance etc.,
Commercial Application is extensive.Alloy product is widely used in the decoration of the products such as door and window, gate, curtain wall, household electrical appliances and bathroom.
But, restricted by aluminium physics itself, chemical property, on the one hand, its case hardness is relatively low, scratch easily occurs
Or cut；On the other hand, made panel and section bar, although its color can keep the bright and new degree of a period of time, warp
After a while after (being usually 1/3rd or so of its equipment life), its color can be thin out, or even fades completely, particularly
In the intensity of illumination relatively longer environment of strong, light application time, it can keep the time of bright and new degree can be shorter.The nineties in last century,
In the market occurs in that a kind of artificial stainless steel aluminium section bar, and it is the method using electrophoresis, and forming one layer on the surface of aluminium section bar imitates not
Become rusty steel metal color and luster film, although its case hardness is slightly higher than the case hardness of conventional aluminium section bar, its be able to maintain that (including
Hardness and color and luster) time it is not oversize, therefore its persistence is poor.
The content of the invention
The purpose of the present invention is that there is provided a kind of surface treatment work of door and window aluminium alloy extrusions for problem of the prior art
Skill.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of process of surface treatment of door and window aluminium alloy extrusions, comprises the following steps：
A. oil removing：Acid deoiling method is used to section bar, removes the greasy dirt and grease impression of Surface of profile；
B. wire drawing：Section bar is handled using wire drawing machine, to produce silking in Surface of profile, from a diameter of 150-200mm wire drawing
Wheel, the section bar speed of travel is 10-15m/min, and wire drawing wheel speed is 1300-1600r/min；
C. chemical polishing：Temperature in use is 90-120 DEG C, and solution ratio is every liter of phosphoric acid 200-800ml for being 85% containing concentration,
Concentration is 98% sulfuric acid 100-700ml, and polishing agent carries out chemical polishing for 50-100g solution to section bar, during chemical polishing
Between be 20-30min；
D. anodic oxidation：Using the section bar handled by step a-d as anode, the electrolysis that immersion sulfuric acid weight content is 18-22%
In liquid, in current density 2400-2600A/m2, operating voltage 14-16V, under conditions of 22-26 DEG C of electrolysis temperature, electrolytic oxidation
Time 20-25min, makes the surface of aluminum component obtain one layer of anode oxide film；
E. anti-corrosion protection：Anti-corrosion protection is carried out to the Surface of profile obtained in step d, then by the aluminium after anti-corrosion protection
Alloy product is placed in lye tank (vat) and carries out moving back oxidation film process, and alkali lye tank liquor is sodium hydroxide solution, and temperature is 55-65 DEG C, time
For 45-55s, dried after cleaning；
F. the anti-corrosion protection of Surface of profile is removed, is wiped, the aluminium alloy extrusions after being handled.
Further, after the completion of the step c, it is every liter using solution ratio and contains NaOH70-100g, go out photo etching 50-80g
Solution section bar is soaked into 1-5min.
Further, after the completion of the step d, sealing pores are carried out to aluminium alloy extrusions.
Further, the sealing of hole is 15-35 DEG C in temperature, and tank liquor proportioning contains Ni for every liter2+≤ 4g, F-1For 0.1-
0.8g pore-sealing liquid, pH value is carries out under the conditions of 5.5-7.0 nickel acetate tank liquor, the sealing of hole time is 5-25 minutes.
Further, after the completion of the step e, aluminium alloy extrusions is placed in progress compo spraying in spray booth, made
Aluminium alloy section surface one layer of overcoat of formation, and enable aluminum alloy to micropore all closings of Surface of profile oxide-film；Spraying is completed
Aluminium alloy extrusions is placed in baking vessel afterwards and toasted, the overcoat solidification of Surface of profile is enabled aluminum alloy to, obtains with overcoat
Aluminium alloy extrusions.
Further, the thickness of the overcoat is 25-40um.
Further, the compo is formed by oiliness anti-ultraviolet paint and high-strength high hard coating allotment, both
Allotment ratio is 1：1.
Further, the temperature of the baking is 150-170 DEG C, and the time of baking is 25-30min.
The present invention compared with prior art, with following beneficial effect：
Present invention employs the technique of oil removing, wire drawing, chemical polishing, anodic oxidation and anti-corrosion protection, section bar is enabled aluminum alloy to
Surface has thread texture, is smooth to the touch fine and smooth and has high-gloss metal true qualities, overcomes common anode oxidation, electrophoretic painting
Make aluminium have mechanical lines and thermal transfer, dust, painting makes defect of the aluminium without metallic luster.
In addition, the present invention sprays what is allocated by anti-ultraviolet paint and high-strength high hard coating in aluminium alloy section surface
Compo, both can effectively strengthen its ultraviolet resistance, extend the bright and new time of its color and luster, ensure that the height on its surface
Strong high hardware features；Sealing of hole process particularly be ensure that into the adhesive strength between sprayed coating and aluminium workpiece surface oxide-film.Therefore, should
With the aluminium alloy extrusions that is handled with technique for surface treatment of aluminium alloy sections of door and window of the present invention, the existing higher hardness in its surface and
Intensity, has bright and new color and luster, and can keep longer time again.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
A kind of process of surface treatment of door and window aluminium alloy extrusions, comprises the following steps：
A. oil removing：Acid deoiling method is used to section bar, removes the greasy dirt and grease impression of Surface of profile；
B. wire drawing：Section bar is handled using wire drawing machine, to produce silking in Surface of profile, from a diameter of 150mm pulling wheel, type
The material speed of travel is 15m/min, and wire drawing wheel speed is 1300r/min；
C. chemical polishing：Temperature in use is 120 DEG C, and solution ratio is every liter of phosphoric acid 200ml for being 85% containing concentration, and concentration is
98% sulfuric acid 700ml, polishing agent carries out chemical polishing to section bar for 50g solution, and the chemical polishing time is 30min；
D. anodic oxidation：Using the section bar handled by step a-d as anode, the electrolysis that immersion sulfuric acid weight content is 18%
In liquid, in current density 2600A/m2, operating voltage 14V, under conditions of 26 DEG C of electrolysis temperature, electrolytic oxidation time 20min,
The surface of aluminum component is set to obtain one layer of anode oxide film；
E. anti-corrosion protection：Anti-corrosion protection is carried out to the Surface of profile obtained in step d, then by the aluminium after anti-corrosion protection
Alloy product is placed in lye tank (vat) and carries out moving back oxidation film process, and alkali lye tank liquor is sodium hydroxide solution, and temperature is 65 DEG C, and the time is
45s, is dried after cleaning；
F. the anti-corrosion protection of Surface of profile is removed, is wiped, the aluminium alloy extrusions after being handled.
After the completion of the step c, it is every liter using solution ratio and contains NaOH100g, the solution for going out photo etching 50g soaks section bar
Steep 5min.
After the completion of the step d, sealing pores are carried out to aluminium alloy extrusions.
The sealing of hole is 15-35 DEG C in temperature, and tank liquor proportioning contains Ni for every liter2+≤ 4g, F-1For 0.1g pore-sealing liquid, PH
It is worth progress under the conditions of the nickel acetate tank liquor for 7.0, the sealing of hole time is 5 minutes.
After the completion of the step e, aluminium alloy extrusions is placed in progress compo spraying in spray booth, section bar is enabled aluminum alloy to
Surface forms one layer of overcoat, and enables aluminum alloy to micropore all closings of Surface of profile oxide-film；By aluminium alloy after the completion of spraying
Section bar is placed in baking vessel and toasted, and enables aluminum alloy to the overcoat solidification of Surface of profile, obtains the aluminium alloy extrusions with overcoat.
The thickness of the overcoat is 40um.
The compo is formed by oiliness anti-ultraviolet paint and high-strength high hard coating allotment, and both allotment ratios are
1：1.
The temperature of the baking is 150 DEG C, and the time of baking is 30min.
The present embodiment employs the technique of oil removing, wire drawing, chemical polishing, anodic oxidation and anti-corrosion protection, enables aluminum alloy to
The surface of section bar has thread texture, is smooth to the touch fine and smooth and has high-gloss metal true qualities, overcomes common anode oxidation, electricity
Electrophoresis painting dressing make aluminium have mechanical lines and thermal transfer, dust, painting makes defect of the aluminium without metallic luster.
In addition, the present invention sprays what is allocated by anti-ultraviolet paint and high-strength high hard coating in aluminium alloy section surface
Compo, both can effectively strengthen its ultraviolet resistance, extend the bright and new time of its color and luster, ensure that the height on its surface
Strong high hardware features；Sealing of hole process particularly be ensure that into the adhesive strength between sprayed coating and aluminium workpiece surface oxide-film.Therefore, should
With the aluminium alloy extrusions that is handled with technique for surface treatment of aluminium alloy sections of door and window of the present invention, the existing higher hardness in its surface and
Intensity, has bright and new color and luster, and can keep longer time again.
Embodiment 2
A kind of process of surface treatment of door and window aluminium alloy extrusions, comprises the following steps：
A. oil removing：Acid deoiling method is used to section bar, removes the greasy dirt and grease impression of Surface of profile；
B. wire drawing：Section bar is handled using wire drawing machine, to produce silking in Surface of profile, from a diameter of 200mm pulling wheel, type
The material speed of travel is 10m/min, and wire drawing wheel speed is 1600r/min；
C. chemical polishing：Temperature in use is 90 DEG C, and solution ratio is every liter of phosphoric acid 800ml for being 85% containing concentration, and concentration is
98% sulfuric acid 100ml, polishing agent carries out chemical polishing to section bar for 100g solution, and the chemical polishing time is 20min；
D. anodic oxidation：Using the section bar handled by step a-d as anode, the electrolyte that immersion sulfuric acid weight content is 22%
In, in current density 2400A/m2, operating voltage 16V, under conditions of 22 DEG C of electrolysis temperature, electrolytic oxidation time 25min makes
The surface of aluminum component obtains one layer of anode oxide film；
E. anti-corrosion protection：Anti-corrosion protection is carried out to the Surface of profile obtained in step d, then by the aluminium after anti-corrosion protection
Alloy product is placed in lye tank (vat) and carries out moving back oxidation film process, and alkali lye tank liquor is sodium hydroxide solution, and temperature is 55 DEG C, and the time is
55s, is dried after cleaning；
F. the anti-corrosion protection of Surface of profile is removed, is wiped, the aluminium alloy extrusions after being handled.
After the completion of the step c, it is every liter using solution ratio and contains NaOH70g, the solution for going out photo etching 80g soaks section bar
1min。
After the completion of the step d, sealing pores are carried out to aluminium alloy extrusions.
The sealing of hole is 35 DEG C in temperature, and tank liquor proportioning contains Ni for every liter2+≤ 4g, F-1For 0.1g pore-sealing liquid, pH value is
Carried out under the conditions of 7.0 nickel acetate tank liquor, the sealing of hole time is 5 minutes.
After the completion of the step e, aluminium alloy extrusions is placed in progress compo spraying in spray booth, section bar is enabled aluminum alloy to
Surface forms one layer of overcoat, and enables aluminum alloy to micropore all closings of Surface of profile oxide-film；By aluminium alloy after the completion of spraying
Section bar is placed in baking vessel and toasted, and enables aluminum alloy to the overcoat solidification of Surface of profile, obtains the aluminium alloy extrusions with overcoat.
The thickness of the overcoat is 40um.
The compo is formed by oiliness anti-ultraviolet paint and high-strength high hard coating allotment, and both allotment ratios are
1：1.
The temperature of the baking is 150 DEG C, and the time of baking is 30min.
The present embodiment employs the technique of oil removing, wire drawing, chemical polishing, anodic oxidation and anti-corrosion protection, enables aluminum alloy to
The surface of section bar has thread texture, is smooth to the touch fine and smooth and has high-gloss metal true qualities, overcomes common anode oxidation, electricity
Electrophoresis painting dressing make aluminium have mechanical lines and thermal transfer, dust, painting makes defect of the aluminium without metallic luster.
In addition, the present invention sprays what is allocated by anti-ultraviolet paint and high-strength high hard coating in aluminium alloy section surface
Compo, both can effectively strengthen its ultraviolet resistance, extend the bright and new time of its color and luster, ensure that the height on its surface
Strong high hardware features；Sealing of hole process particularly be ensure that into the adhesive strength between sprayed coating and aluminium workpiece surface oxide-film.Therefore, should
With the aluminium alloy extrusions that is handled with technique for surface treatment of aluminium alloy sections of door and window of the present invention, the existing higher hardness in its surface and
Intensity, has bright and new color and luster, and can keep longer time again.
Embodiment 3
A kind of process of surface treatment of door and window aluminium alloy extrusions, comprises the following steps：
A. oil removing：Acid deoiling method is used to section bar, removes the greasy dirt and grease impression of Surface of profile；
B. wire drawing：Section bar is handled using wire drawing machine, to produce silking in Surface of profile, from a diameter of 180mm pulling wheel, type
The material speed of travel is 13m/min, and wire drawing wheel speed is 1450r/min；
C. chemical polishing：Temperature in use is 105 DEG C, and solution ratio is every liter of phosphoric acid 500ml for being 85% containing concentration, and concentration is
98% sulfuric acid 400ml, polishing agent carries out chemical polishing to section bar for 75g solution, and the chemical polishing time is 25min；
D. anodic oxidation：Using the section bar handled by step a-d as anode, the electrolyte that immersion sulfuric acid weight content is 20%
In, in current density 2500A/m2, operating voltage 15V, under conditions of 24 DEG C of electrolysis temperature, electrolytic oxidation time 23min makes
The surface of aluminum component obtains one layer of anode oxide film；
E. anti-corrosion protection：Anti-corrosion protection is carried out to the Surface of profile obtained in step d, then by the aluminium after anti-corrosion protection
Alloy product is placed in lye tank (vat) and carries out moving back oxidation film process, and alkali lye tank liquor is sodium hydroxide solution, and temperature is 60 DEG C, and the time is
50s, is dried after cleaning；
F. the anti-corrosion protection of Surface of profile is removed, is wiped, the aluminium alloy extrusions after being handled.
After the completion of the step c, it is every liter using solution ratio and contains NaOH85g, the solution for going out photo etching 65g soaks section bar
3min。
After the completion of the step d, sealing pores are carried out to aluminium alloy extrusions.
The sealing of hole is 15-35 DEG C in temperature, and tank liquor proportioning contains Ni for every liter2+≤ 4g, F-1For 0.5g pore-sealing liquid, PH
It is worth progress under the conditions of the nickel acetate tank liquor for 6, the sealing of hole time is 15 minutes.
After the completion of the step e, aluminium alloy extrusions is placed in progress compo spraying in spray booth, section bar is enabled aluminum alloy to
Surface forms one layer of overcoat, and enables aluminum alloy to micropore all closings of Surface of profile oxide-film；By aluminium alloy after the completion of spraying
Section bar is placed in baking vessel and toasted, and enables aluminum alloy to the overcoat solidification of Surface of profile, obtains the aluminium alloy extrusions with overcoat.
The thickness of the overcoat is 32um.
The compo is formed by oiliness anti-ultraviolet paint and high-strength high hard coating allotment, and both allotment ratios are
1：1.
The temperature of the baking is 160 DEG C, and the time of baking is 28min.
The present embodiment employs the technique of oil removing, wire drawing, chemical polishing, anodic oxidation and anti-corrosion protection, enables aluminum alloy to
The surface of section bar has thread texture, is smooth to the touch fine and smooth and has high-gloss metal true qualities, overcomes common anode oxidation, electricity
Electrophoresis painting dressing make aluminium have mechanical lines and thermal transfer, dust, painting makes defect of the aluminium without metallic luster.
In addition, the present invention sprays what is allocated by anti-ultraviolet paint and high-strength high hard coating in aluminium alloy section surface
Compo, both can effectively strengthen its ultraviolet resistance, extend the bright and new time of its color and luster, ensure that the height on its surface
Strong high hardware features；Sealing of hole process particularly be ensure that into the adhesive strength between sprayed coating and aluminium workpiece surface oxide-film.Therefore, should
With the aluminium alloy extrusions that is handled with technique for surface treatment of aluminium alloy sections of door and window of the present invention, the existing higher hardness in its surface and
Intensity, has bright and new color and luster, and can keep longer time again.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, although with reference to the foregoing embodiments
The present invention is described in detail, for those skilled in the art, it still can be to foregoing embodiments institute
The technical scheme of record is modified, or carries out equivalent substitution to which part technical characteristic.It is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of process of surface treatment of door and window aluminium alloy extrusions, it is characterised in that comprise the following steps：
A. oil removing：Acid deoiling method is used to section bar, removes the greasy dirt and grease impression of Surface of profile；
B. wire drawing：Section bar is handled using wire drawing machine, to produce silking in Surface of profile, from a diameter of 150-200mm wire drawing
Wheel, the section bar speed of travel is 10-15m/min, and wire drawing wheel speed is 1300-1600r/min；
C. chemical polishing：Temperature in use is 90-120 DEG C, and solution ratio is every liter of phosphoric acid 200-800ml for being 85% containing concentration,
Concentration is 98% sulfuric acid 100-700ml, and polishing agent carries out chemical polishing for 50-100g solution to section bar, during chemical polishing
Between be 20-30min；
D. anodic oxidation：Using the section bar handled by step a-d as anode, the electrolysis that immersion sulfuric acid weight content is 18-22%
In liquid, in current density 2400-2600A/m2, operating voltage 14-16V, under conditions of 22-26 DEG C of electrolysis temperature, electrolytic oxidation
Time 20-25min, makes the surface of aluminum component obtain one layer of anode oxide film；
E. anti-corrosion protection：Anti-corrosion protection is carried out to the Surface of profile obtained in step d, then by the aluminium after anti-corrosion protection
Alloy product is placed in lye tank (vat) and carries out moving back oxidation film process, and alkali lye tank liquor is sodium hydroxide solution, and temperature is 55-65 DEG C, time
For 45-55s, dried after cleaning；
F. the anti-corrosion protection of Surface of profile is removed, is wiped, the aluminium alloy extrusions after being handled.
2. a kind of process of surface treatment of door and window aluminium alloy extrusions according to claim 1, it is characterised in that the step
After the completion of rapid c, it is every liter using solution ratio and contains NaOH70-100g, section bar is soaked 1-5min by the solution for going out photo etching 50-80g.
3. a kind of process of surface treatment of door and window aluminium alloy extrusions according to claim 1, it is characterised in that the step
After the completion of rapid d, sealing pores are carried out to aluminium alloy extrusions.
4. a kind of process of surface treatment of door and window aluminium alloy extrusions according to claim 3, it is characterised in that the envelope
Hole is 15-35 DEG C in temperature, and tank liquor proportioning contains Ni for every liter2+≤ 4g, F-1For 0.1-0.8g pore-sealing liquid, pH value is 5.5-7.0
Nickel acetate tank liquor under the conditions of carry out, the sealing of hole time be 5-25 minutes.
5. a kind of process of surface treatment of door and window aluminium alloy extrusions according to claim 1, it is characterised in that the step
After the completion of rapid e, aluminium alloy extrusions is placed in progress compo spraying in spray booth, one layer of Surface of profile formation is enabled aluminum alloy to and prevents
Sheath, and enable aluminum alloy to micropore all closings of Surface of profile oxide-film；Aluminium alloy extrusions is placed in baking vessel after the completion of spraying
Middle baking, enables aluminum alloy to the overcoat solidification of Surface of profile, obtains the aluminium alloy extrusions with overcoat.
6. the process of surface treatment of a kind of door and window aluminium alloy extrusions according to claim 5, it is characterised in that described anti-
The thickness of sheath is 25-40um.
7. the process of surface treatment of a kind of door and window aluminium alloy extrusions according to claim 5, it is characterised in that described mixed
Close coating to be formed by oiliness anti-ultraviolet paint and high-strength high hard coating allotment, both allotment ratios are 1：1.
8. a kind of process of surface treatment of door and window aluminium alloy extrusions according to claim 5, it is characterised in that the baking
Roasting temperature is 150-170 DEG C, and the time of baking is 25-30min.
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