CN110952123A - Preparation method of high-corrosion-resistance aluminum alloy anodic oxidation protective layer - Google Patents
Preparation method of high-corrosion-resistance aluminum alloy anodic oxidation protective layer Download PDFInfo
- Publication number
- CN110952123A CN110952123A CN201911332058.5A CN201911332058A CN110952123A CN 110952123 A CN110952123 A CN 110952123A CN 201911332058 A CN201911332058 A CN 201911332058A CN 110952123 A CN110952123 A CN 110952123A
- Authority
- CN
- China
- Prior art keywords
- anodic oxidation
- graphene
- aluminum alloy
- layer
- preparing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- C25D11/06—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
Abstract
The invention discloses a preparation method of a high-corrosion-resistance aluminum alloy anodic oxidation protective layer, which comprises an anodic oxidation layer and a graphene sealing layer, wherein the anodic oxidation layer is prepared on the surface of an aluminum alloy substrate and is sealed by a nano-hydroxyl graphene sealant. According to the aluminum alloy anodic oxidation and graphene closed protective layer provided by the invention, a neutral salt spray test is carried out for 1200h according to GB/T10125 and 2012 salt spray test for artificial atmosphere corrosion test, and no white corrosive is generated on the surface of a plated part.
Description
Technical Field
The invention belongs to the technical field of metal surface treatment, and particularly relates to a preparation method of a high-corrosion-resistance aluminum alloy anodic oxidation protective layer.
Background
The aluminum alloy anodic oxidation process is widely applied to the fields of aviation, electric appliances, electronic industry, various mechanical manufacturing and light industry. The porosity of the aluminum alloy anode oxide layer is 10-15% on average, and the anode oxide layer is required to be subjected to hole sealing treatment in order to improve the corrosion resistance. In the prior art, a nickel salt sealant is adopted to carry out hole sealing treatment on an aluminum alloy anode oxide layer. With the increasing awareness of environmental protection, some countries and regions have limited the use of the nickel salt sealing process.
With the development of manufacturing industry, the existing aluminum alloy anodic oxidation process cannot meet the increasing technical requirements in the industry, and the work of developing new technology to improve the corrosion resistance of aluminum alloy is imperative.
Disclosure of Invention
The invention provides a preparation method of a high-corrosion-resistance aluminum alloy anodic oxidation protective layer, aiming at overcoming the technical defect that the prior art for aluminum alloy anodic oxidation adopts nickel salt hole sealing and solving the problem that an aluminum alloy anodic oxidation layer is not high enough in corrosion resistance. In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a high-corrosion-resistance aluminum alloy anodic oxidation protective layer comprises the following steps:
(1) carrying out oil removal and acid pickling pretreatment on the aluminum alloy matrix;
(2) preparing an anodic oxidation layer on the surface of the aluminum alloy substrate treated in the step (1);
(3) carrying out hole sealing treatment on the anodic oxide layer prepared in the step (2);
(4) dipping the aluminum alloy piece subjected to hole sealing treatment in the step (3) with a graphene sealing agent;
(5) drying and curing the graphene sealing layer formed in the step (4);
sealing holes by adopting a nano graphene oxide sealant in the step (3);
the overcoat layer may not include a graphene capping layer.
In some embodiments, the nano-hydroxy graphene sealant contains nano-hydroxy graphene with a mass concentration of 0.3-1.5 g/L.
In some embodiments, the preparation method of the nano-hydroxy graphene sealant comprises the following steps: adding concentrated sulfuric acid and graphite into a reactor, using potassium permanganate as an oxidant, preparing graphene oxide through three steps of oxidation at low temperature, medium temperature and high temperature, reducing excessive potassium permanganate with hydrogen peroxide, removing acid and salt in a reaction product by using an electrodialysis method, then adding 20% of sodium hydroxide solution to adjust the pH value to 9-11, converting sulfate-based graphene into hydroxyl graphene, removing excessive sodium hydroxide by using an electrodialysis method to enable the pH value of the hydroxyl graphene pasty liquid to be 8.0-9.0, and adding deionized water to adjust the mass concentration of nano hydroxyl graphene to be 0.3-1.5 g/L.
In some embodiments, the graphene blocking agent in step (4) is a hydroxyl graphene modified blocking agent.
In some embodiments, the hydroxyl graphene modified sealant is PRODICO 460 hydroxyl graphene modified sealant manufactured by Guangzhou ultra-Pont chemical industry Co.
In some embodiments, the graphene sealing layer has a thickness of 0.3-1.5 μm.
In some of the embodiments, the anodized layer in step (2) is prepared by a sulfuric acid anodizing process.
In some embodiments, the anodized layer in step (2) is prepared by an oxalic acid anodizing process.
In some embodiments, the anodized layer has a thickness of 5 to 25 μm.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the traditional nickel salt sealant is replaced by the nano-hydroxy graphene sealant, the nano-hydroxy graphene is filled into the gaps of the anodic oxide layer to seal the gaps, the sealing effect is superior to that of nickel salt sealing, and the technical defect of harm to human skin caused by the existing nickel salt sealing is overcome;
2. hydroxyl on the surface of the nano-hydroxyl graphene can react with an aluminum matrix to generate a graphene hydroxyl aluminum compound, so that a stronger passivation effect is exerted on the aluminum matrix, and the corrosion resistance of the aluminum alloy is further improved;
3. according to the invention, the aluminum alloy part subjected to anodic oxidation and hole sealing treatment is sealed by adopting the hydroxyl graphene modified sealing agent, the sealing layer has high corrosion resistance, wear resistance, conductivity and self-sealing property, and the surface performance of the aluminum alloy part can be obviously improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
fig. 1 is a schematic structural view of an aluminum alloy protective layer according to examples 1 and 2 of the present invention.
Fig. 2 is a schematic structural view of an aluminum alloy protective layer according to embodiment 3 of the present invention.
Detailed Description
In order that the invention may be more readily understood, reference will now be made to the following more particular description of the invention, examples of which are given by way of illustration. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1:
as shown in fig. 1, a preparation method of a high corrosion resistance aluminum alloy anodic oxidation protective layer comprises the steps of sequentially preparing an anodic oxidation layer 2 and a graphene sealing layer 3 from inside to outside on the surface of an aluminum alloy matrix 1, wherein the anodic oxidation layer is sealed by a nano-hydroxy graphene sealant.
1. The anodic oxidation layer 2 is prepared by adopting a traditional sulfuric acid anodic oxidation process:
H2SO4：(180～200)g/L
temperature: 15 ℃ to 35 ℃,
anode current density: (0.5-2) A/dm2
And (3) oxidation time: (20 to 60) min
Cathode material: lead plate
2. The polar oxide layer 2 is sealed by adopting a nano-hydroxyl graphene sealant:
nano hydroxyl graphene: (0.3 to 1.5) g/L
Temperature: at room temperature
Time: (2 to 10) min
The preparation method of the hydroxyl graphene sealant comprises the following steps:
(1) low-temperature oxidation: adding 115mL of concentrated sulfuric acid into a 1000mL beaker, reducing the temperature of the concentrated sulfuric acid by 2-5 ℃ in an ice water bath, adding 5g of 300-mesh flake graphite powder with the mass fraction of more than 99%, slowly adding 18g of potassium permanganate while stirring, controlling the reaction temperature within the range of 2-10 ℃, and reacting for 120min while stirring;
(2) medium-temperature oxidation: changing the ice water bath into a warm water bath, controlling the reaction temperature between 30 and 40 ℃, and reacting for 90min under stirring;
(3) high-temperature oxidation: after the medium temperature reaction, taking the beaker out of the water bath, heating the paste in the beaker to 90 ℃, slowly adding 100mL of water, controlling the reaction temperature to be 90-100 ℃, stirring for 30min, slowly adding 15mL of 30% hydrogen peroxide into the beaker, and continuing the reaction for 30 min;
(4) removing acid and salt in the reaction product by using an electrodialysis method, adding a 20% sodium hydroxide solution to adjust the pH value to 9-11 to convert the sulfate-based graphene into the hydroxyl graphene, removing excessive sodium hydroxide by using an electrodialysis method to adjust the pH value of the hydroxyl graphene paste to 8-9, and adding deionized water to adjust the mass concentration of the nano hydroxyl graphene to 0.3-1.5 g/L.
3. The graphene sealing layer 3 is prepared from PRODICO 460 hydroxy graphene modified sealing agent produced by Nippon chemical industry:
PRODICO 460 hydroxyl graphene modified sealant: (200-400) g/L
Temperature: at room temperature
Time: (10 to 30) s
The preparation method of the PRODICO 460 hydroxyl graphene modified sealant comprises the following steps: 30 parts of commercially available product silica sol, 25 parts of water-soluble silane polymer with the product model of PU 113, 4 parts of nano hydroxyl graphene solution with the mass fraction of 4%, 0.5 part of TANAFAMS organic silicon defoamer, 0.5 part of LA13-863 organic silicon flatting agent and 40 parts of deionized water, and the components are mixed together and stirred uniformly.
The operation of the embodiment is divided into the following steps:
1. pretreatment: performing the steps of "alkaline chemical degreasing → washing → acid washing → washing" on the aluminum alloy substrate 1;
2. anodic oxidation layer 2: after pretreatment of the aluminum alloy matrix 1, preparing an anodic oxide layer 2 by sulfuric acid anodic oxidation → water washing → graphene hole sealing;
3. graphene sealing layer 3: after anodic oxidation and hole sealing of the aluminum alloy matrix, preparing a graphene sealing layer 3 by soaking graphene sealing liquid → dripping water → blowing off the sealing liquid remained at the bottom of the workpiece by high-pressure air → drying and curing at 70-100 ℃.
Example 2:
as shown in fig. 1, a preparation method of a high corrosion resistance aluminum alloy anodic oxidation protective layer comprises the steps of sequentially preparing an anodic oxidation layer 2 and a graphene sealing layer 3 from inside to outside on the surface of an aluminum alloy matrix 1, wherein the anodic oxidation layer is sealed by a nano-hydroxy graphene sealant.
1. The anodic oxidation layer 2 is prepared by adopting a traditional oxalic acid anodic oxidation process:
oxalic acid: (50-70) g/L
Temperature: at the temperature of between 20 and 35 ℃,
anode current density: (1-2) A/dm2
And (3) oxidation time: (30 to 40) min
Cathode material: carbon rod
2. The polar oxide layer 2 is sealed by adopting a nano-hydroxyl graphene sealant:
nano hydroxyl graphene: (0.3 to 1.5) g/L
Temperature: at room temperature
Time: (2 to 10) min
The preparation method of the hydroxy graphene sealant is the same as that of the embodiment 1.
3. The graphene sealing layer 3 is prepared by using PRODICO 460 hydroxy graphene modified sealing agent:
PRODICO 460 hydroxy graphene sealant: (200-400) g/L
Temperature: at room temperature
Time: (10 to 30) s
The preparation method of the PRODICO 460 hydroxyl graphene modified sealing agent is the same as that of the example 1.
The operation of the embodiment is divided into the following steps:
1. pretreatment: performing the steps of "alkaline chemical degreasing → washing → acid washing → washing" on the aluminum alloy substrate 1;
2. anodic oxidation layer 2: after pretreatment of the aluminum alloy matrix 1, preparing an anodic oxide layer 2 by oxalic acid anodic oxidation → water washing → graphene hole sealing;
3. graphene sealing layer 3: after anodic oxidation and hole sealing of the aluminum alloy matrix, preparing a graphene sealing layer 3 by soaking graphene sealing liquid → dripping water → blowing off the sealing liquid remained at the bottom of the workpiece by high-pressure air → drying and curing at 70-100 ℃.
Example 3:
as shown in fig. 2, a preparation method of a high corrosion resistance aluminum alloy anodic oxidation protective layer is that an anodic oxidation layer 2 is prepared on the surface of an aluminum alloy matrix 1, and the anodic oxidation layer is sealed by a nano-hydroxy graphene sealant.
1. The anodic oxidation layer 2 is prepared by adopting a traditional sulfuric acid anodic oxidation process:
H2SO4：(180～200)g/L
temperature: 15 ℃ to 35 ℃,
current density: (0.5-2) A/dm2
And (3) oxidation time: (20 to 60) min
Cathode material: lead plate
2. The polar oxide layer 2 is sealed by adopting a nano-hydroxyl graphene sealant:
nano hydroxyl graphene: (0.3 to 1.5) g/L
Temperature: at room temperature
Time: (2 to 10) min
The preparation method of the hydroxy graphene sealant is the same as that of the embodiment 1.
The operation of the embodiment is divided into the following steps:
1. pretreatment: performing the steps of "alkaline chemical degreasing → washing → acid washing → washing" on the aluminum alloy substrate 1;
2. anodic oxidation layer 2: after pretreatment of the aluminum alloy matrix 1, preparing an anodic oxide layer 2 by sulfuric acid anodic oxidation → water washing → graphene sealing → drying at 60-80 ℃;
the protective layers of the aluminum alloy parts prepared in the examples 1 and 2 are subjected to a neutral salt spray test for 1200h according to GB/T10125-2012 salt spray test for Artificial atmosphere Corrosion test, and the protective layers of the aluminum alloy parts prepared in the example 3 are subjected to a neutral salt spray test for 600h without generating white corrosion on the surfaces. The salt spray resistance of the aluminum alloy anodic oxidation protective layer prepared by the invention meets the requirement of neutral salt spray test for 336h under the standard of HB 5362-86' quality inspection for corrosion resistance of metal protective layers commonly used in airplanes, and particularly, the aluminum alloy anodic oxidation and graphene sealed protective layer has more excellent corrosion resistance.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A preparation method of a high-corrosion-resistance aluminum alloy anodic oxidation protective layer is characterized by comprising the following steps: the method comprises the following steps:
(1) carrying out oil removal and acid pickling pretreatment on the aluminum alloy matrix;
(2) preparing an anodic oxidation layer on the surface of the aluminum alloy substrate treated in the step (1);
(3) carrying out hole sealing treatment on the anodic oxide layer prepared in the step (2);
and (3) sealing holes by adopting a nano-hydroxyl graphene sealant.
2. A preparation method of a high-corrosion-resistance aluminum alloy anodic oxidation protective layer is characterized by comprising the following steps: the method comprises the following steps:
(1) carrying out oil removal and acid pickling pretreatment on the aluminum alloy matrix;
(2) preparing an anodic oxidation layer on the surface of the aluminum alloy substrate treated in the step (1);
(3) carrying out hole sealing treatment on the anodic oxide layer prepared in the step (2);
(4) dipping the aluminum alloy piece subjected to hole sealing treatment in the step (3) with a graphene sealing agent;
(5) drying and curing the graphene sealing layer formed in the step (4);
and (3) sealing holes by adopting a nano-hydroxyl graphene sealant.
3. The method for preparing the anodic oxidation protective layer of the aluminum alloy with high corrosion resistance according to claim 1 or 2, wherein: the nano-hydroxy graphene hole sealing agent contains nano-hydroxy graphene, and the mass concentration of the nano-hydroxy graphene is 0.3-1.5 g/L.
4. The preparation method of the high-corrosion-resistance aluminum alloy anodic oxidation protective layer according to claim 3, wherein the preparation method of the nano-hydroxyl graphene sealant comprises the following steps: adding concentrated sulfuric acid and graphite into a reactor, using potassium permanganate as an oxidant, preparing graphene oxide through three steps of oxidation at low temperature, medium temperature and high temperature, reducing excessive potassium permanganate with hydrogen peroxide, removing acid and salt in a reaction product by using an electrodialysis method, then adding 20% of sodium hydroxide solution to adjust the pH value to 9-11, converting sulfate-based graphene into hydroxyl graphene, removing excessive sodium hydroxide by using an electrodialysis method to enable the pH value of the hydroxyl graphene pasty liquid to be 8.0-9.0, and adding deionized water to adjust the mass concentration of nano hydroxyl graphene to be 0.3-1.5 g/L.
5. The method for preparing the anodic oxidation protective layer of the aluminum alloy with high corrosion resistance according to claim 2, wherein the steps of: and (4) modifying the graphene sealant with hydroxy graphene.
6. The method for preparing the anodic oxidation protective layer of the aluminum alloy with high corrosion resistance according to claim 5, wherein the steps of: the hydroxyl graphene modified sealing agent is PRODICO 460 hydroxyl graphene modified sealing agent produced by Guangzhou ultra-Pont chemical industry Co.
7. The method for preparing the anodic oxidation protective layer of the aluminum alloy with high corrosion resistance according to claim 2, wherein the steps of: the thickness of the graphene sealing layer is 0.3-1.5 mu m.
8. The method for preparing the anodic oxidation protective layer of the aluminum alloy with high corrosion resistance according to claim 1 or 2, wherein: and (3) preparing the anodic oxidation layer in the step (2) by adopting a sulfuric acid anodic oxidation process.
9. The method for preparing the anodic oxidation protective layer of the aluminum alloy with high corrosion resistance according to claim 1 or 2, wherein: and (3) preparing the anodic oxidation layer in the step (2) by adopting an oxalic acid anodic oxidation process.
10. The method for preparing the anodic oxidation protective layer of the aluminum alloy with high corrosion resistance according to claim 1 or 2, wherein: the thickness of the anodic oxidation layer is 5-25 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911332058.5A CN110952123A (en) | 2019-12-21 | 2019-12-21 | Preparation method of high-corrosion-resistance aluminum alloy anodic oxidation protective layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911332058.5A CN110952123A (en) | 2019-12-21 | 2019-12-21 | Preparation method of high-corrosion-resistance aluminum alloy anodic oxidation protective layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110952123A true CN110952123A (en) | 2020-04-03 |
Family
ID=69983512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911332058.5A Pending CN110952123A (en) | 2019-12-21 | 2019-12-21 | Preparation method of high-corrosion-resistance aluminum alloy anodic oxidation protective layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110952123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364083A (en) * | 2020-04-15 | 2020-07-03 | 浙江龙纪汽车零部件股份有限公司 | Automobile luggage rack anodic oxidation process with high-corrosion-resistance protective film |
| CN111455425A (en) * | 2020-04-15 | 2020-07-28 | 浙江龙纪汽车零部件股份有限公司 | Anodic oxidation process of high-corrosion-resistance automobile aluminum material |
| CN114214698A (en) * | 2022-01-12 | 2022-03-22 | 江阴迈科美新能源科技有限公司 | Aluminum profile anodic oxidation process applied to photovoltaic frame |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173833A (en) * | 2013-03-07 | 2013-06-26 | 洛阳伟信电子科技有限公司 | Anodization closing method for improving corrosion resistance of aluminum alloy |
| CN105970268A (en) * | 2016-07-28 | 2016-09-28 | 关亚玲 | Treatment method for aluminum alloy surface anodic oxidation-hole sealing |
| CN108129885A (en) * | 2017-12-22 | 2018-06-08 | 广州超邦化工有限公司 | Hydroxyl graphene is modified coating sealer and preparation method thereof |
| CN108179418A (en) * | 2018-02-08 | 2018-06-19 | 广州超邦化工有限公司 | A kind of preparation method of zn-ni alloy deposits structure suitable under strong corrosive environment |
| CN109338433A (en) * | 2018-12-03 | 2019-02-15 | 北京航空航天大学 | A kind of graphene oxide of anode oxide film/collosol and gel closing process |
-
2019
- 2019-12-21 CN CN201911332058.5A patent/CN110952123A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173833A (en) * | 2013-03-07 | 2013-06-26 | 洛阳伟信电子科技有限公司 | Anodization closing method for improving corrosion resistance of aluminum alloy |
| CN105970268A (en) * | 2016-07-28 | 2016-09-28 | 关亚玲 | Treatment method for aluminum alloy surface anodic oxidation-hole sealing |
| CN108129885A (en) * | 2017-12-22 | 2018-06-08 | 广州超邦化工有限公司 | Hydroxyl graphene is modified coating sealer and preparation method thereof |
| CN108179418A (en) * | 2018-02-08 | 2018-06-19 | 广州超邦化工有限公司 | A kind of preparation method of zn-ni alloy deposits structure suitable under strong corrosive environment |
| CN109338433A (en) * | 2018-12-03 | 2019-02-15 | 北京航空航天大学 | A kind of graphene oxide of anode oxide film/collosol and gel closing process |
Non-Patent Citations (2)
| Title |
|---|
| BING XUE ET AL.: "Corrosion protection of AA2024-T3 by sol-gel film modified with graphene oxide", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
| MEI YU ET AL.: "Effects of graphene oxide-filled sol-gel sealing on the corrosion resistance and paint adhesion of anodized aluminum", 《APPLIED SURFACE SCIENCE》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364083A (en) * | 2020-04-15 | 2020-07-03 | 浙江龙纪汽车零部件股份有限公司 | Automobile luggage rack anodic oxidation process with high-corrosion-resistance protective film |
| CN111455425A (en) * | 2020-04-15 | 2020-07-28 | 浙江龙纪汽车零部件股份有限公司 | Anodic oxidation process of high-corrosion-resistance automobile aluminum material |
| CN114214698A (en) * | 2022-01-12 | 2022-03-22 | 江阴迈科美新能源科技有限公司 | Aluminum profile anodic oxidation process applied to photovoltaic frame |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108179418B (en) | Preparation method of zinc-nickel alloy coating structure suitable for strong corrosion environment | |
| CN110952123A (en) | Preparation method of high-corrosion-resistance aluminum alloy anodic oxidation protective layer | |
| CN104651908B (en) | The preparation method and method for sealing of a kind of Mg alloy surface ceramic film | |
| CN105088309B (en) | A kind of energy-efficient anode oxidative treatment method of pack alloy | |
| JP2014136832A (en) | Anodic oxide film and method for manufacturing the same | |
| CN103173833B (en) | One kind improves the corrosion proof anodization enclosure method of aluminium alloy | |
| CN105256342A (en) | Copper-based super-hydrophobic surface and preparation method thereof | |
| KR101200526B1 (en) | Method for surface treating available the metallic effect | |
| CN104451811A (en) | Method for forming super-lubricating surface on metal surface | |
| CN110438542A (en) | A kind of anode oxidation process of aluminium alloy automobile luggage carrier | |
| CN106119926A (en) | A kind of ceramic coating formed by micro-arc oxidation and preparation method thereof | |
| CN109234773A (en) | A kind of preparation method of Mg alloy surface composite coating | |
| CN109023471B (en) | Aluminum alloy and preparation method thereof | |
| CN114381777A (en) | Aluminum alloy anodic oxidation composite sealing method | |
| CN103789810A (en) | Method for preparing micro-arc oxidation ceramic film layer on surface of magnesium alloy | |
| CN211546693U (en) | Aluminum alloy anodic oxidation and graphene sealing protective layer | |
| CN111074323A (en) | Normal-temperature nickel-free sealing liquid for aluminum and aluminum alloy anodic oxidation and sealing method | |
| CN215103561U (en) | High corrosion resistance coating structure of iron casting galvanized iron alloy | |
| CN113046811B (en) | Micro-arc oxidation electrolyte, application method thereof and workpiece | |
| CN218786661U (en) | Steel bluing and graphene enclosed protective layer structure | |
| CN114032547A (en) | Alloy surface composite coating and preparation method thereof | |
| CN108531962B (en) | Magnesium alloy surface enhancement treatment method | |
| CN102051655A (en) | Beryllium part anodizing process | |
| CN104561967A (en) | Preparation process for chemical conversion coating on surface of magnesium alloy | |
| CN107937953B (en) | Al-alloy casing and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200403 |
|
| RJ01 | Rejection of invention patent application after publication |