CN107443657A - A kind of heat-resisting sun-proof surface treatment method of Al alloy parts - Google Patents
A kind of heat-resisting sun-proof surface treatment method of Al alloy parts Download PDFInfo
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- CN107443657A CN107443657A CN201710492086.8A CN201710492086A CN107443657A CN 107443657 A CN107443657 A CN 107443657A CN 201710492086 A CN201710492086 A CN 201710492086A CN 107443657 A CN107443657 A CN 107443657A
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- alloy parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- 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
- C25D11/026—Anodisation with spark discharge
-
- 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
- C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- ing And Chemical Polishing (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention belongs to Al alloy parts technical field of surface, and in particular to a kind of heat-resisting sun-proof surface treatment method of Al alloy parts, including differential arc oxidation processing, the processing of wet etching solution, the irradiation of UV lamp case, injection fused mass.The present invention has advantages below compared with prior art：By to carrying out differential arc oxidation to it after aluminium alloy preliminary treatment in the present invention, enable aluminum alloy to surface film oxide and the mutually transformation with structure occurs, its surface void is small, hardness is high, irradiated again with UV lamp case after being handled using wet etching solution, its surface is set to form the hole that can connect the nano-pore in former oxide layer, its structure is complex, by making it be combined closely with aluminium alloy fused mass injection, obtained protective layer can be in high temperature, irradiated and unaffected under the conditions of irradiating for a long time, avoid the problem of faying face is had a great influence by high temperature, add its use range.
Description
Technical field
The invention belongs to Al alloy parts technical field of surface, and in particular to a kind of heat-resisting sun-proof table of Al alloy parts
Face processing method.
Background technology
The generator that existing part open air uses is made using glass steel, and fiberglass is fiber-reinforced plastic, has matter
The characteristics of measuring light, insulation, high mechanical strength, but glass-reinforced plastic material is out of doors in use, illumination ageing, environmental pollution can be run into
There is the problems such as acid rain, cause its service life shorter, glass-reinforced plastic material thermal diffusivity is poor, can influence the overall operation effect of motor
Rate, in order to change this situation, the good aluminum alloy materials of generally use thermal diffusivity replace fiberglass, and are moulded in its surface spraying
Powder, but in prolonged solar radiation and motor operation course, resulting protective layer is easily cracked, even comes off,
Cause matrix to be easily corroded, may also occur Similar Problems using coating, and if without protection, and easily occur rotten
Erosion, therefore, should be handled its surface.
The content of the invention
The purpose of the present invention is to be directed to the problem of existing, there is provided a kind of heat-resisting sun-proof surface treatment side of Al alloy parts
Method.
The present invention is achieved by the following technical solutions：A kind of heat-resisting sun-proof surface treatment method of Al alloy parts, bag
Include herein below：
（1）Solution when Al alloy parts through pre-treatment are put into progress differential arc oxidation processing, wherein differential arc oxidation in electrolytic cell
In at least sodium tripolyphosphate containing 6.8g/L, the oxidation film layer that thickness is 20-80 μm is formed on its surface；
（2）Al alloy parts after above-mentioned processing are put into the wet etching solution that temperature is 50-55 DEG C, soak the 35-45 seconds,
Take out, after being rinsed with clear water, irradiate 3-4 hours with UV lamp case；
（3）Al alloy parts after irradiation are put into injection forming mold, thereto dioxide injection titanium/perfluorinated sulfonic acid melting
The crystal diameter of thing, wherein titanium dioxide is 2-8nm, and its weight is the 6-10% of perfluorinated sulfonic resin weight；
（4）Taken out after fused mass cooling.
As further improvement of these options, the pre-treatment includes with degreasing agent oil removing, debris, use is washed with water
Alkaline solution removes aluminum alloy surface oxide, surface alkalinty solution and booty, drying is washed with water.
As further improvement of these options, the condition of the differential arc oxidation processing is：With pending aluminium alloy work
Part is anode, and stainless steel makees negative electrode, and using constant current controlling mode, the electric current ratio of positive negative sense is 1:1, current density 8-9A/
dm²。
As further improvement of these options, solution composition is during the differential arc oxidation：Sodium hydroxide 2-2.5g/L,
Sodium tripolyphosphate 6.8-8.5g/L, borax 2.2-3.8g/L, diphenyl phosphonic acid 4.2-5.2g/L.
As further improvement of these options, in the titanium dioxide/perfluorinated sulfonic acid fused mass also include equivalent to
Perfluorinated sulfonic resin weight 1-3% aziridine crosslinker, 2.2-3.4% makrolon, 0.8-1.7% carbodiimides,
0.3-0.7% oxalic acid.
As further improvement of these options, the wet etching solution includes the raw material of following percentage by weight：
Phosphoric acid 78-84%, nitric acid 2-6%, acetic acid 3-7%, surplus are water.
The present invention has advantages below compared with prior art：By to being carried out after aluminium alloy preliminary treatment to it in the present invention
Differential arc oxidation, enable aluminum alloy to surface film oxide and the mutually transformation with structure occurs, control its differential arc oxidation composition and thickness, obtain aluminium
The oxide-film of alloy surface includes the transition zone and the working lining based on α-Al2O3 that thickness is 3-5 μm, its surface void is small,
Hardness is high, is irradiated again with UV lamp case after being handled using wet etching solution, and forming its surface can be by the nanometer in former oxide layer
The hole of hole connection, its structure is complex, by making it be combined closely with aluminium alloy fused mass injection, obtained protection
Layer can in high temperature, irradiate for a long time under the conditions of irradiate and unaffected, avoid the problem of faying face is had a great influence by high temperature,
Add its use range.
Embodiment
Embodiment 1
A kind of heat-resisting sun-proof surface treatment method of Al alloy parts, including herein below：
（1）Al alloy parts through pre-treatment are put into progress differential arc oxidation processing in electrolytic cell, the differential arc oxidation processing
Condition is：Using pending Al alloy parts as anode, stainless steel makees negative electrode, using constant current controlling mode, the electric current of positive negative sense
Than for 1:1, current density 8.5A/dm2；Solution composition is during the differential arc oxidation：Sodium hydroxide 2.2g/L, sodium tripolyphosphate
7.4g/L, borax 2.8g/L, diphenyl phosphonic acid 4.6g/L, the oxidation film layer that thickness is 20-80 μm is formed on its surface；
（2）Al alloy parts after above-mentioned processing are put into the wet etching solution that temperature is 50-55 DEG C, soak the 35-45 seconds,
Take out, after being rinsed with clear water, irradiate 3-4 hours with UV lamp case；The wet etching solution includes the original of following percentage by weight
Material：Phosphoric acid 82%, nitric acid 4%, acetic acid 4%, surplus are water；
（3）Al alloy parts after irradiation are put into injection forming mold, thereto dioxide injection titanium/perfluorinated sulfonic acid melting
The crystal diameter of thing, wherein titanium dioxide is 5nm, and its weight is the 8% of perfluorinated sulfonic resin weight, the titanium dioxide/perfluor
Also include in sulfonic acid fused mass equivalent to the aziridine crosslinker of perfluorinated sulfonic resin weight 2%, 2.8% makrolon, 1.4%
Carbodiimides, 0.5% oxalic acid；
（4）Taken out after fused mass cooling.
Wherein, the pre-treatment include with degreasing agent oil removing, be washed with water debris, with alkaline solution remove aluminum alloy surface
Oxide, surface alkalinty solution and booty, drying is washed with water.
Embodiment 2
A kind of heat-resisting sun-proof surface treatment method of Al alloy parts, including herein below：
（1）Al alloy parts through pre-treatment are put into progress differential arc oxidation processing in electrolytic cell, the differential arc oxidation processing
Condition is：Using pending Al alloy parts as anode, stainless steel makees negative electrode, using constant current controlling mode, the electric current of positive negative sense
Than for 1:1, current density 8A/dm2；Solution composition is during the differential arc oxidation：Sodium hydroxide 2.2g/L, sodium tripolyphosphate
8.5g/L, borax 2.2g/L, diphenyl phosphonic acid 4.2g/L, the oxidation film layer that thickness is 20-80 μm is formed on its surface；
（2）Al alloy parts after above-mentioned processing are put into the wet etching solution that temperature is 50-55 DEG C, soak the 35-45 seconds,
Take out, after being rinsed with clear water, irradiate 3-4 hours with UV lamp case；The wet etching solution includes the original of following percentage by weight
Material：Phosphoric acid 84%, nitric acid 2%, acetic acid 3%, surplus are water；
（3）Al alloy parts after irradiation are put into injection forming mold, thereto dioxide injection titanium/perfluorinated sulfonic acid melting
The crystal diameter of thing, wherein titanium dioxide is 2-8nm, and its weight is the 6% of perfluorinated sulfonic resin weight, the titanium dioxide/complete
In fluosulfonic acid fused mass also include equivalent to the aziridine crosslinker of perfluorinated sulfonic resin weight 3%, 3.4% makrolon,
0.8% carbodiimides, 0.3% oxalic acid；
（4）Taken out after fused mass cooling.
Embodiment 3
A kind of heat-resisting sun-proof surface treatment method of Al alloy parts, including herein below：
（1）Al alloy parts through pre-treatment are put into progress differential arc oxidation processing in electrolytic cell, the differential arc oxidation processing
Condition is：Using pending Al alloy parts as anode, stainless steel makees negative electrode, using constant current controlling mode, the electric current of positive negative sense
Than for 1:1, current density 8-9A/dm2；Solution composition is during the differential arc oxidation：Sodium hydroxide 2.5g/L, sodium tripolyphosphate
8.5g/L, borax 3.8g/L, diphenyl phosphonic acid 5.2g/L, the oxidation film layer that thickness is 20-80 μm is formed on its surface；
（2）Al alloy parts after above-mentioned processing are put into the wet etching solution that temperature is 50-55 DEG C, soak the 35-45 seconds,
Take out, after being rinsed with clear water, irradiate 3-4 hours with UV lamp case；The wet etching solution includes the original of following percentage by weight
Material：Phosphoric acid 78%, nitric acid 6%, acetic acid 3%, surplus are water；
（3）Al alloy parts after irradiation are put into injection forming mold, thereto dioxide injection titanium/perfluorinated sulfonic acid melting
The crystal diameter of thing, wherein titanium dioxide is 2-8nm, and its weight is the 10% of perfluorinated sulfonic resin weight, the titanium dioxide/
In perfluorinated sulfonic acid fused mass also include equivalent to the aziridine crosslinker of perfluorinated sulfonic resin weight 1%, 2.2% makrolon,
1.7% carbodiimides, 0.7% oxalic acid；
（4）Taken out after fused mass cooling.
Control group 1 is set, by sodium tripolyphosphate replaces with the six inclined of equivalent in solution composition during differential arc oxidation in embodiment 1
Sodium phosphate, remaining content are constant；
The step of setting control group 2, wet etching solution in embodiment 1 is soaked removes, and remaining content is constant；
The step of setting control group 3, UV lamp case in embodiment 1 is irradiated removes, and remaining content is constant；
Control group 4 is set, in epoxy adhesive of the aluminum alloy surface through thermmohardening, outer coating fused mass；
The adhesion of its fused mass and aluminum alloy surface is detected after the completion of prepared by above each group, is then in conjunction with intensity
The ratio of adhesion and bonded area, it is that B modes are broken that it, which observes fracture mode,；
Each group material is detected into its bond strength, and calculate its holding after being handled 8 hours under conditions of temperature is 80 DEG C again
Rate；
Again by each group material in ultraviolet (UV) aging test chamber aging 24 hours, wherein illumination temperature be 60 DEG C, illumination condensation
Cycle is 8H illumination, 4H condensations, detects its bond strength, and calculate its conservation rate；
Obtain adhesion such as following table：
Table 1
| Group | Bond strength（MPa） | High-temperature process conservation rate（%） | Burin-in process conservation rate（%） |
| Embodiment 1 | 18.3 | 96.3 | 94.6 |
| Embodiment 2 | 17.9 | 97.2 | 95.1 |
| Embodiment 3 | 18.3 | 96.8 | 94.9 |
| Control group 1 | 14.5 | 86.5 | 72.6 |
| Control group 2 | 14.7 | 81.5 | 74.3 |
| Control group 3 | 12.8 | 69.3 | 58.3 |
| Control group 4 | 15.9 | 72.8 | 64.2 |
It can be seen that by data in table 1 and wet etching solution immersion treatment or UV lamp case treatment with irradiation be used alone to knot
Closing intensity has certain booster action, and corresponding high temperature or illumination effect have a great influence to its adhesion, and then can have a strong impact on it
Performance, and in the prior art although the use of binding agent has certain high temperature resistant light shine ability, but still do not reach makes accordingly
Use demand.
Claims (6)
1. a kind of heat-resisting sun-proof surface treatment method of Al alloy parts, it is characterised in that including herein below：
（1）Solution when Al alloy parts through pre-treatment are put into progress differential arc oxidation processing, wherein differential arc oxidation in electrolytic cell
In at least sodium tripolyphosphate containing 6.8g/L, the oxidation film layer that thickness is 20-80 μm is formed on its surface；
（2）Al alloy parts after above-mentioned processing are put into the wet etching solution that temperature is 50-55 DEG C, soak the 35-45 seconds,
Take out, after being rinsed with clear water, irradiate 3-4 hours with UV lamp case；
（3）Al alloy parts after irradiation are put into injection forming mold, thereto dioxide injection titanium/perfluorinated sulfonic acid melting
The crystal diameter of thing, wherein titanium dioxide is 2-8nm, and its weight is the 6-10% of perfluorinated sulfonic resin weight；
（4）Taken out after fused mass cooling.
A kind of 2. heat-resisting sun-proof surface treatment method of Al alloy parts as claimed in claim 1, it is characterised in that the pre-treatment
Including with degreasing agent oil removing, debris is washed with water, aluminum alloy surface oxide is removed with alkaline solution, surface alkalinty is washed with water
Solution and booty, drying.
A kind of 3. heat-resisting sun-proof surface treatment method of Al alloy parts as claimed in claim 1, it is characterised in that the differential of the arc oxygen
Changing the condition handled is：Using pending Al alloy parts as anode, stainless steel makees negative electrode, positive and negative using constant current controlling mode
To electric current ratio be 1:1, current density 8-9A/dm2.
A kind of 4. heat-resisting sun-proof surface treatment method of Al alloy parts as claimed in claim 3, it is characterised in that the differential of the arc oxygen
Solution composition is during change：Sodium hydroxide 2-2.5g/L, sodium tripolyphosphate 6.8-8.5g/L, borax 2.2-3.8g/L, diphenylphosphine
Sour 4.2-5.2g/L.
A kind of 5. heat-resisting sun-proof surface treatment method of Al alloy parts as claimed in claim 1, it is characterised in that the titanium dioxide
Also include aziridine crosslinker equivalent to perfluorinated sulfonic resin weight 1-3%, 2.2-3.4% in titanium/perfluorinated sulfonic acid fused mass
Makrolon, 0.8-1.7% carbodiimides, 0.3-0.7% oxalic acid.
6. a kind of heat-resisting sun-proof surface treatment method of Al alloy parts as claimed in claim 1, it is characterised in that the wet type is carved
Erosion solution includes the raw material of following percentage by weight：Phosphoric acid 78-84%, nitric acid 2-6%, acetic acid 3-7%, surplus are water.
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