CN107740161A - Aluminium alloy compression casting product anodic oxidation preparation method - Google Patents
Aluminium alloy compression casting product anodic oxidation preparation method Download PDFInfo
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- CN107740161A CN107740161A CN201711086675.2A CN201711086675A CN107740161A CN 107740161 A CN107740161 A CN 107740161A CN 201711086675 A CN201711086675 A CN 201711086675A CN 107740161 A CN107740161 A CN 107740161A
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- anodic oxidation
- aluminium alloy
- compression casting
- casting product
- alloy compression
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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
- C25D11/06—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
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
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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
- C25D11/06—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
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Aluminium alloy compression casting product anodic oxidation preparation method, is related to aluminium alloy compression casting product.Electrochemical deoiling；Desiliconization membrane removal；Sandblasting；Chemical polishing or mechanical polishing light extraction；Ash disposal；Anodic oxidation；Colored.Desiliconization membrane removal mainly is used, new formula new technology weak acid anodic oxidation is employed, realizes the anodic oxidation of pack alloy.In the market aluminium alloy compression casting product due to silicon content it is higher, can not anodic oxidation, it can only paint or electroplate and carry out anti-corrosion and product surface attractive in appearance, it is intended for the physical methods such as desiliconization, and newly it is formulated so as to realize that pack alloy can be with heat-tinting, production efficiency is improved, energy-saving and emission-reduction, reduces the heavy metal pollution of plating and the VOC volatilizations of spraying.
Description
Technical field
The present invention relates to aluminium alloy compression casting product, more particularly, to aluminium alloy compression casting product anodic oxidation preparation method.
Background technology
China is aluminium consumption amount big country, and because the specific strength of aluminium alloy is high, density is small, is widely used in various products, passes through
Product is made in extruding, forging, punching press, and surface treatment is handled using anode oxidation coloration, and protection metal improves corrosion resistance to be made again
Product appearance is gorgeous colorful.But because product structure is complicated sometimes, the modes such as simple extruding can not be used to produce shaping, therefore again
Milling Machining shaping is cut using CNC, for CNC processing efficiencies the bottom of compared with, cost is higher, is a big puzzlement of current aluminium machine-shaping；Pass
System pack alloy product, in order to increase the mobility under material liquid, in order to die cast, generally all containing a certain amount of
Silicon, while silicon can make the mechanical properties such as strength of materials hardness up to standard again, but because silicon is nonmetallic, in anode oxidation process
Silicon ash (dust) will be produced in product surface, form lacklustre sponge ash film, cause that honorable gorgeous sun can not be realized
Pole aoxidizes outward appearance.Pack alloy product will play the technique such as anti-corrosion and the spray painting of beauty function generally use and plating at present, by
Substantial amounts of heavy metal pollution can be produced in plating, spray painting can cause VOC atmosphere pollution, and cost is again high, is unfavorable for energy-saving and emission-reduction, no
Environmental protection, it is not the production technology that environmentally friendly economy is advocated.Based on this, we develop a set of new processing method, can be with
Preferably realize the anode oxidation coloration of pack alloy product.
Under the dissolving of aluminium ingot secondary high-temperature, its metal is in amorphous conjunction state, simultaneously because the freezing point of various metallic elements is again
Inconsistent, during product die casting during moment cold cut, product surface forms other various intermetallic compounds and metal
Segregation phenomena, both factors all can cause difficulty to anodized, so, it is necessary to thoroughly remove chemical combination between surface metal
Thing can be only achieved preferable anodic oxidation effect.
Chinese patent CN101760771A discloses a kind of anodic oxidation surface treatment process method of aluminum alloy die casting, solution
It can not certainly be applied on pack alloy product with conventional anodization process of surface treatment.Concrete technology method is first to use
Aluminum alloy die-casting technological product blank, is then machined in right amount to product, in anodized surface before processing, is entered in advance
Row surface sand-blasting process, obtain uniformly and fine and close surface sand-blasting layer, then managed using anode oxidation surface processing process
The alloy product thought.
The content of the invention
It is an object of the invention to provide aluminium alloy compression casting product anodic oxidation preparation method.
The present invention comprises the following steps：
1) electrochemical deoiling；
In step 1), the electrochemical deoiling can use washing, and the temperature of the washing can be 45~65 DEG C, washing when
Between can be 1~3min；The electrochemical deoiling can use aluminium degreasing agent, and the aluminium degreasing agent can use sodium hydroxide tertiary sodium phosphate
Deng the dosage of the aluminium degreasing agent can be 15~35g/L.
2) desiliconization membrane removal；
In step 2), the desiliconization membrane removal can use HNO3, HF, additive and water, HNO by mass percentage345%
~65%, HF 15%~25%, additive 15%~25%, Yu Weishui；The additive can use acetic acid etc., the desiliconization
Membrane removal can at normal temperatures, and the time of desiliconization membrane removal can be 1~5min；The thickness of desiliconization membrane removal can be 10 μm, can effectively prevent
Tobacco can also effectively remove the various intermetallic compounds such as Cu, Fe, Mg, Si, make pure aluminum substrate exposed, be easy to anodic oxidation.
3) sandblasting (shot-peening)；
In step 3), the sandblasting can use ceramic sand or aluminum shot, and the ceramic sand can use 80-170 ceramic sands,
The aluminum shot can use 2-6 aluminum shots, to fill and lead up the pit of the product surface after desiliconization, while reach uniform beautiful after oxidation
Outward appearance.
4) chemical polishing or mechanical polishing light extraction；
In step 4), the chemical polishing can use the smokeless change throwing liquid for replacing three acid to match somebody with somebody by 60%~90% with water,
The temperature of the chemical polishing can be 85~110 DEG C, and the time of chemical polishing can be 1~5min.
5) ash disposal；
In step 5), the ash disposal can use deashing agent ammoniacal liquor 10%~20% to be matched with water, and the time of ash disposal can be 1
~5min.
6) anodic oxidation；
In step 6), material can be used by the anodic oxidation：
The temperature of the anodic oxidation can be 16~23 DEG C, and the electric current of anodic oxidation can be 1.5~3A/dm2。
7) Colored.
In step 7), the Colored according to consumer product demand, can prepare the staining trough of different colours, carry out more
Kind color dyes, then carry out 35 DEG C or 85 DEG C closings.
The present invention mainly uses desiliconization membrane removal, employs new formula new technology weak acid anodic oxidation, realizes die casting aluminium conjunction
The anodic oxidation of gold.In the market aluminium alloy compression casting product due to silicon content it is higher, can not anodic oxidation, can only paint or electricity
Plating carries out anti-corrosion and product surface attractive in appearance, it is contemplated that carrying out the physical methods such as desiliconization, and is newly formulated so as to realize die casting
Aluminium alloy can be improved production efficiency, energy-saving and emission-reduction, reduced the heavy metal pollution of plating and the VOC of spraying with heat-tinting
Volatilization.
Embodiment
The present invention is further illustrated for following examples.
The present invention comprises the following steps：
1) electrochemical deoiling, the electrochemical deoiling can use washing, and the temperature of the washing is 45~65 DEG C, the time of washing
For 1~3min；The electrochemical deoiling uses aluminium degreasing agent, and the aluminium degreasing agent is using sodium hydroxide tertiary sodium phosphate etc., the aluminium
The dosage of degreasing agent is 15~35g/L.
2) desiliconization membrane removal, the desiliconization membrane removal use HNO3, HF, additive and water, HNO by mass percentage345%~
65%, HF 15%~25%, additive 15%~25%, Yu Weishui；The additive is using acetic acid etc., the desiliconization membrane removal
At normal temperatures, the time of desiliconization membrane removal is 1~5min；The thickness of desiliconization membrane removal is 10 μm, can effectively prevent tobacco from can also have
Effect removes the various intermetallic compounds such as Cu, Fe, Mg, Si, makes pure aluminum substrate exposed, is easy to anodic oxidation.
3) sandblasting (shot-peening)；The sandblasting can use ceramic sand or aluminum shot, and the ceramic sand uses 80-170 ceramic sands,
The aluminum shot uses 2-6 aluminum shots, to fill and lead up the pit of the product surface after desiliconization, while reaches uniform beautiful after oxidation
Outward appearance.
4) chemical polishing or mechanical polishing light extraction, the chemical polishing using the changes for smokelessly replacing three acid throw liquid by 60%~
90% matches somebody with somebody with water, 85~110 DEG C of the temperature of the chemical polishing, and the time of chemical polishing is 1~5min.
5) ash disposal：Ash disposal can use deashing agent ammoniacal liquor 10%~20% to be matched with water, and the time of ash disposal can be 1~5min.
6) anodic oxidation：Material is used by the anodic oxidation：
The temperature of the anodic oxidation is 16~23 DEG C, and the electric current of anodic oxidation is 1.5~3A/dm2。
7) Colored.The Colored according to consumer product demand, can prepare the staining trough of different colours, carry out more
Kind color dyes, then carry out 35 DEG C or 85 DEG C closings.
Claims (10)
1. aluminium alloy compression casting product anodic oxidation preparation method, it is characterised in that comprise the following steps：
1) electrochemical deoiling；
2) desiliconization membrane removal；
3) sandblasting；
4) chemical polishing or mechanical polishing light extraction；
5) ash disposal；
6) anodic oxidation；
7) Colored.
2. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that described in step 1)
Electrochemical deoiling is using washing, and the temperature of the washing is 45~65 DEG C, and the time of washing is 1~3min.
3. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that described in step 1)
Electrochemical deoiling uses aluminium degreasing agent, and the aluminium degreasing agent uses sodium hydroxide tertiary sodium phosphate, and the dosage of the aluminium degreasing agent is 15
~35g/L.
4. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that described in step 2)
Desiliconization membrane removal uses HNO3, HF, additive and water, HNO by mass percentage345%~65%, HF 15%~25%, addition
Agent 15%~25%, Yu Weishui.
5. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that described in step 2)
Additive uses acetic acid, and the time of the desiliconization membrane removal is 1~5min；The thickness of desiliconization membrane removal is 10 μm.
6. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that described in step 3)
Sandblasting uses ceramic sand or aluminum shot；The ceramic sand can use 80-170 ceramic sands, and the aluminum shot can use 2-6 aluminum shots.
7. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that described in step 4)
Chemical polishing is matched somebody with somebody using the changes throwing liquid smokelessly instead of three acid by 60%~90% with water, the temperature 85~110 of the chemical polishing
DEG C, the time of chemical polishing is 1~5min.
8. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that described in step 5)
Ash disposal is matched using deashing agent ammoniacal liquor 10%~20% with water, and the time of ash disposal is 1~5min.
9. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that described in step 6)
Material is used by anodic oxidation：
The temperature of the anodic oxidation can be 16~23 DEG C, and the electric current of anodic oxidation can be 1.5~3A/dm2。
10. aluminium alloy compression casting product anodic oxidation preparation method as claimed in claim 1, it is characterised in that in step 7), institute
Colored is stated according to consumer product demand, prepares the staining trough of different colours, carries out multiple color coloring, then carry out 35 DEG C or
85 DEG C of closings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086675.2A CN107740161A (en) | 2017-11-07 | 2017-11-07 | Aluminium alloy compression casting product anodic oxidation preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086675.2A CN107740161A (en) | 2017-11-07 | 2017-11-07 | Aluminium alloy compression casting product anodic oxidation preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN107740161A true CN107740161A (en) | 2018-02-27 |
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ID=61234162
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711086675.2A Pending CN107740161A (en) | 2017-11-07 | 2017-11-07 | Aluminium alloy compression casting product anodic oxidation preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826663A (en) * | 2020-07-05 | 2020-10-27 | 江苏荣企新材料科技有限公司 | Surface cleaning treatment process for aluminum-magnesium alloy metal frame |
| CN114045543A (en) * | 2021-11-29 | 2022-02-15 | 安镁金属制品（深圳）有限公司 | Pretreatment equipment and process for high-appearance colored anodized aluminum alloy die casting |
Citations (5)
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|---|---|---|---|---|
| CN103484914A (en) * | 2013-09-30 | 2014-01-01 | 王才照 | High silicon aluminum alloy anodic oxidation method and equipment thereof |
| CN104805485A (en) * | 2015-04-07 | 2015-07-29 | 广东欧珀移动通信有限公司 | Surface treatment method for die-cast aluminum alloy |
| CN105839059A (en) * | 2016-03-31 | 2016-08-10 | 东莞酷派软件技术有限公司 | Surface treatment method of die-cast aluminum alloy exterior part and die-cast aluminum alloy exterior part product |
| CN105937045A (en) * | 2016-06-17 | 2016-09-14 | 霍山县龙鑫金属制品有限公司 | Die-casting aluminum alloy surface treatment method |
| CN106191955A (en) * | 2016-08-26 | 2016-12-07 | 广东欧珀移动通信有限公司 | A kind of aluminium alloy anode oxide technique and anodized aluminum alloy |
-
2017
- 2017-11-07 CN CN201711086675.2A patent/CN107740161A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484914A (en) * | 2013-09-30 | 2014-01-01 | 王才照 | High silicon aluminum alloy anodic oxidation method and equipment thereof |
| CN104805485A (en) * | 2015-04-07 | 2015-07-29 | 广东欧珀移动通信有限公司 | Surface treatment method for die-cast aluminum alloy |
| CN105839059A (en) * | 2016-03-31 | 2016-08-10 | 东莞酷派软件技术有限公司 | Surface treatment method of die-cast aluminum alloy exterior part and die-cast aluminum alloy exterior part product |
| CN105937045A (en) * | 2016-06-17 | 2016-09-14 | 霍山县龙鑫金属制品有限公司 | Die-casting aluminum alloy surface treatment method |
| CN106191955A (en) * | 2016-08-26 | 2016-12-07 | 广东欧珀移动通信有限公司 | A kind of aluminium alloy anode oxide technique and anodized aluminum alloy |
Non-Patent Citations (1)
| Title |
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| 莚正胜: ""铝压铸件的阳极氧化"", 《防腐与包装》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826663A (en) * | 2020-07-05 | 2020-10-27 | 江苏荣企新材料科技有限公司 | Surface cleaning treatment process for aluminum-magnesium alloy metal frame |
| CN114045543A (en) * | 2021-11-29 | 2022-02-15 | 安镁金属制品（深圳）有限公司 | Pretreatment equipment and process for high-appearance colored anodized aluminum alloy die casting |
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Application publication date: 20180227 |