CN107955961A - A kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating - Google Patents
A kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating Download PDFInfo
- Publication number
- CN107955961A CN107955961A CN201711267956.8A CN201711267956A CN107955961A CN 107955961 A CN107955961 A CN 107955961A CN 201711267956 A CN201711267956 A CN 201711267956A CN 107955961 A CN107955961 A CN 107955961A
- Authority
- CN
- China
- Prior art keywords
- preparation
- magnesium alloy
- differential arc
- corrosion
- inhibiting coating
- 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.)
- Granted
Links
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
- C25D11/30—Anodisation of magnesium or alloys based thereon
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating, belong to conductive coating field.Its preparation method comprises the following steps：Electric conductive oxidation processing is carried out in chromatedsolution after the processing of magnesium alloy materials premenstruum (premenstrua), is protected the non-differential arc oxidization surface of part using polytetrafluoroethylene (PTFE) frock, then each part is subjected to differential arc oxidation processing, disassembling fixture in sodium silicate solution.Electric conductive oxidation and differential arc oxidization technique are combined, realizes the magnesium alloy materials surface not only function of anti-corrosion but also conduction.The beneficial effects of the invention are as follows while the electric conductivity between not reducing magnesium alloy component, its antiseptic property is improved.
Description
Technical field
The invention belongs to conductive coating field, is related to a kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating.Specifically
It is related to a kind of electric conductive oxidation and differential arc oxidation combined technology, realizes the material surface not only function of anti-corrosion but also conduction.
Background technology
The bottleneck of limitation magnesium alloy application is that its very poor corrosion resisting property, and magnesium alloy has very high chemical and electrochemical
Activity is learned, particularly is highly susceptible to corrode in moist and coastal area in an atmosphere.So marine environment is all the time
Magnesium alloy uses forbidden zone.But as on-board equipment lightweight demand is more and more urgent, have to use magnesium alloy materials,
Therefore magnesium alloy anti-corrosion becomes and must solve the problems, such as.
The common surface treatment method of magnesium alloy has chemical oxidation, anodic oxidation, the coat of metal, physical vapor to sink at present
Product, ion implanting, laser surface alloying etc..All there are some shortcomings for these surface treatment methods：The film of chemical oxidation generation
Layer is relatively thin, and matter is crisp porous, and wearability, corrosion resistance are bad, generally as decoration and intervening guard layer.The chemistry of magnesium alloy at present
Oxidation is main or using chromic anhydride acid or bichromate as the chemistry of aqueous solution processing (being known as chromaking processing) of main component, chromate
In Cr6+With toxicity, environmental pollution is serious, and discharge is limited be subject to environmental regulation, and treatment cost of waste liquor is high；Anodic oxygen
Change film layer hole is larger, and skewness, is generally also only used as application bottom；Coat of metal complex process, bath stability is poor,
Film layer is poor with basal body binding force；Physical vapour deposition (PVD) is of high cost with ion implanting；Laser surface alloying processing can produce size
Change, it is necessary to additional mechanical process, cost is also higher, is still in infancy at home at present.
Differential arc oxidation is directly by parent metal oxidation and sinter into oxide ceramics, and film layer is high with substrate combinating strength, film layer
Thickness can be controlled as needed, and hardness and corrosion resistance are good, can be the preferable table of magnesium alloy by electrophoresis colour
Surface treatment method.But magnesium alloy differential arc oxidation oxidation film layer is made of the oxide ceramics based on MgO, this layer of ceramic layer has good
Good insulating properties, and under normal conditions, electronics are required with capability of electromagnetic shielding, to keep magnesium alloy shell class part
Electromagnetic wave shielding, must be requested that between the part mutually assembled keep conduct.Therefore only with differential arc oxidization technique, only
Its antiseptic property can be realized, now there is an urgent need to a kind of not only anti-corrosion but also conductive technological approaches.
The content of the invention
In view of this, it is an object of the invention to provide a kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating.
In order to make electronics shell that not only there is good corrosion resistance, but also keep electromagnetic screen possessed by hardware
Function is covered, the present invention reaches above-mentioned purpose by electric conductive oxidation with the scheme that differential arc oxidation is combined, since then each
On the face being bonded to each other during component assembly, conductive oxide layer plays certain protective action, but do not influence each part base solid it
Between mutual conduction, so as to keep overall function solenoid, it is corrosion resistant that the other surfaces of part have differential arc oxidation layer to play the role of.Tool
Body way is that electric conductive oxidation is first carried out to each part, then the face that each part and other parts are bonded to each other in assembling carries out
Protection, then do differential arc oxidation processing.
To reach purpose described above, the present invention provides following technical solution：A kind of Mg alloy surface conduction corrosion-inhibiting coating
Preparation method, comprise the following steps：
（1）Electric conductive oxidation：Electric conductive oxidation processing is carried out to magnesium alloy parts matrix surface；
（2）Protection：The non-differential arc oxidization surface of part is protected using polytetrafluoroethylene (PTFE) frock；
（3）Differential arc oxidation：Part after protection is subjected to differential arc oxidation processing, during processing, the conductive oxide layer beyond protection face
It can be electrically shocked and wear, conductive oxide layer material and newly-generated magnesia experience molten sintering, cooling under the action of plasma arc
Solidification forms differential arc oxidation layer；
（4）Disassembling fixture：After differential arc oxidation processing, magnesium alloy parts are taken out and are cleaned, and disassembling fixture.
Further, step（1）The electric conductive oxidation processing carries out in chromatedsolution, and the solution formula is CrO3
3-4g/L、Na2Cr2O7 1-3g/L, NaF0.5g/L, corrosion inhibiter 0.5g/L, under room temperature, handle 5-10min.
Further, step（2）Before the assembly tooling, layer of silica gel is coated in non-differential arc oxidization surface, to reach sealing
Effect.
Further, step（3）The micro-arc oxidation process is specially：Microarc oxidation solution is the sodium metasilicate water of 20g/L
Solution, differential arc oxidation frequency 400Hz, duty cycle 50%, average current density 3A/dm2, 470 ± 5V of final voltage, the time
47min。
Further, step（1）It is described to be handled before being further included before carrying out electric conductive oxidation to magnesium alloy parts matrix surface
Step, the pre-treatment include carrying out alkali cleaning, washing, acid leaching process to magnesium alloy parts.
Further, the alkali washing process is in Na by magnesium alloy parts2CO3 20g/L、Na3PO4 18 g/L、Na2SiO3
In the solution of 10g/L and KOH 1g/L, in 50-60 DEG C of temperature, alkali cleaning 5-8min.
Further, the acid leaching process is in HNO by magnesium alloy parts3In solution, 2-3min is handled under room temperature.
The beneficial effects of the present invention are：
The electric conductive oxidation and differential arc oxidization technique that the present invention uses, can while the electric conductivity between not reducing magnesium alloy component,
Improve its antiseptic property；
After magnesium alloy materials electric conductive oxidation, material surface forms one layer of chemical composition coating, and through resistance test, this tunic is to magnesium alloy
The electric conductivity of material has little to no effect；
Using salt spray test in military hardware laboratory environment test method（GJB150.11A-2009）Carry out corrosion-resistant test.
After salt spray test, specimen surface is unchanged, and protecting effect is good.Tried according to GJB150.9A-2009 military hardwares laboratory environment
Damp heat test standard is tested in proved recipe method, and test result meets properties of product requirement；
At present, differential arc oxidation scheme is applied on various types of equipments again after magnesium alloy electric conductive oxidation.
Brief description of the drawings
Fig. 1 is the process flow chart of the present invention；
The frock that Fig. 2 is the present invention protects installation diagram；
Wherein, 1. magnesium alloy parts, 2. layer of silica gel, 3. polytetrafluoroethylene (PTFE) frocks, 4. insulated screws, 5. insulated bolts, 6. are protected
Mask.
Embodiment
Below by specific embodiment, the invention will be further described, so that those skilled in the art can be more preferable
Understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment 1
The AZ31 magnesium alloys of 50 × 100 × 5mm sizes are chosen, it is stand-by after soaked in absolute ethyl alcohol, ultrasonic cleaning, using alkali
Wash, wash, acid leaching process removes the oxide of metal surface and the cold working metal bits that loosely adhere to and has been embedded in surface
Dirt, soda-wash solution formula are：Na2CO3（20g/L）、Na3PO4（18 g/L）、Na2SiO3（10g/L）、KOH（1g/L）, temperature
50 DEG C, alkali cleaning time 6min；Acid dip solution is HNO3（70g/L）, 2min is handled under room temperature.
Treat to carry out aoxidizing conductive technique in chromatedsolution after sample pretreating, solution formula is：CrO3（4g/L）、
Na2Cr2O7（3g/L）、NaF（0.5g/L）, corrosion inhibiter（0.5g/L）, magnesium alloy parts are taken out after handling 10min under room temperature, are dried
It is stand-by.
As shown in Fig. 2, to needing the table with the mutual assembly connection formation conductive contact surfaces of other parts on magnesium alloy parts 1
Face 6 is protected, its protected mode is to make corresponding frock 3 with polytetrafluoroethylene material, when frock is with component assembly, thereon
There is a face with needing face to be protected to be completely superposed, before assembly tooling, silica gel 2 is coated to reach on face to be protected is needed
The effect of sealing.There are threaded hole or through hole, frock on part on the face contacted with other component assemblies under normal circumstances
Pass through nylon with magnesium alloy parts（Or other insulating materials）Screw 4 or bolt 5 are linked and packed, and guarantee needs protection face to be cut with frock
Close close.
The part assembled is microarc oxidation equipment provided using bipolarity T-MAO-B200 types, is configured in sodium metasilicate and pure water
Electrolyte in（Sodium silicate silicate：20g/L）It is processed, micro-arc oxidation process frequency 400Hz, duty cycle 50%, average electricity
Current density 3A/dm2, 470 ± 5V of final voltage, prepare 47min.After completing micro-arc oxidation process processing, part is taken out and is cleaned,
Disassembling fixture, clears up the silica gel in protection face, and drying material carries out subsequent applications.
Conductive oxide layer is retained on the face of the mutual assembly connection of magnesium alloy parts needs by above-mentioned processing so that different
Keep conducting between matrix after component assembly, in addition conductive oxide layer has certain anti-corrosive properties again.The remainder of part
There is differential arc oxidation layer, ensure the corrosion-resistant protection of the whole product after assembling.
2 performance test of embodiment
After the AZ31 magnesium alloy materials electric conductive oxidations of embodiment 1, material surface forms one layer of chemical composition coating, through resistance test,
This tunic has little to no effect the electric conductivity of magnesium alloy materials.
Using military hardware laboratory environment test method（GJB150.11A-2009）Middle salt spray test carries out corrosion-resistant survey
Examination.After salt spray test, specimen surface is unchanged, and protecting effect is good.According to damp heat test mark in GJB150.9A-2009 methods
Standard is tested, and test result meets properties of product requirement.
It should be noted that the preparation method of conduction corrosion-inhibiting coating disclosed by the invention, is equally applicable to other trades mark
Magnesium alloy materials, such as AZ91 series, AM series, AS series and AE series.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
Enclose not limited to this.The equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is subject to claims.
Claims (7)
1. a kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating, it is characterised in that comprise the following steps：
（1）Electric conductive oxidation：Electric conductive oxidation processing is carried out to magnesium alloy parts matrix surface；
（2）Protection：The non-differential arc oxidization surface of part is protected using polytetrafluoroethylene (PTFE) frock；
（3）Differential arc oxidation：Part after protection is subjected to differential arc oxidation processing；
（4）Disassembling fixture：After differential arc oxidation processing, magnesium alloy parts are taken out and are cleaned, and disassembling fixture.
2. the preparation method of Mg alloy surface conduction corrosion-inhibiting coating according to claim 1, it is characterised in that step（1）Institute
The electric conductive oxidation processing stated carries out in chromatedsolution, and the solution formula is CrO3 3-4g/L、Na2Cr2O7 1-3g/L、
NaF0.5g/L, corrosion inhibiter 0.5g/L, under room temperature, handle 5-10min.
3. the preparation method of Mg alloy surface conduction corrosion-inhibiting coating according to claim 1, it is characterised in that step（2）Institute
Before stating assembly tooling, layer of silica gel is coated in non-differential arc oxidization surface.
4. the preparation method of Mg alloy surface conduction corrosion-inhibiting coating according to claim 1, it is characterised in that step（3）Institute
The micro-arc oxidation process stated is：Microarc oxidation solution be 20g/L sodium silicate aqueous solution, differential arc oxidation frequency 400Hz, duty cycle
50%th, average current density 3A/dm2, 470 ± 5V of final voltage, time 47min.
5. the preparation method of Mg alloy surface conduction corrosion-inhibiting coating according to claim 1, it is characterised in that step（1）Institute
State and pre-treatment step is further included before electric conductive oxidation is carried out to magnesium alloy parts matrix surface, the pre-treatment includes closing magnesium
Metal parts carry out alkali cleaning, washing, acid leaching process.
6. the preparation method of Mg alloy surface conduction corrosion-inhibiting coating according to claim 5, it is characterised in that the alkali cleaning
Technique is：Magnesium alloy parts are in Na2CO3 20g/L、Na3PO4 18 g/L、Na2SiO3In the solution of 10g/L and KOH 1g/L,
In 50-60 DEG C of temperature, alkali cleaning 5-8min.
7. the preparation method of Mg alloy surface conduction corrosion-inhibiting coating according to claim 5, it is characterised in that the acidleach
Technique is：Magnesium alloy parts are in HNO3In solution, 2-3min is handled under room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711267956.8A CN107955961B (en) | 2017-12-05 | 2017-12-05 | A kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711267956.8A CN107955961B (en) | 2017-12-05 | 2017-12-05 | A kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107955961A true CN107955961A (en) | 2018-04-24 |
| CN107955961B CN107955961B (en) | 2019-09-10 |
Family
ID=61963206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711267956.8A Expired - Fee Related CN107955961B (en) | 2017-12-05 | 2017-12-05 | A kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107955961B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983415A (en) * | 2019-12-30 | 2020-04-10 | 郑州轻研合金科技有限公司 | Magnesium-lithium alloy surface composite oxidation treatment method |
| CN112064037A (en) * | 2020-10-13 | 2020-12-11 | 贵州电网有限责任公司 | Preparation method of corrosion-resistant magnesium alloy sacrificial anode |
| CN112195457A (en) * | 2020-10-13 | 2021-01-08 | 中国电子科技集团公司第二十研究所 | Magnesium-lithium alloy surface conductive anticorrosive coating and preparation method thereof |
| CN113755927A (en) * | 2021-09-29 | 2021-12-07 | 上海交通大学 | Magnesium neodymium alloy part and composite oxidation treatment method thereof |
| CN115491666A (en) * | 2022-09-07 | 2022-12-20 | 深圳市飞航精工科技有限公司 | Conductive oxidation process for magnesium alloy high-salt-spray test |
| CN115522245A (en) * | 2022-08-12 | 2022-12-27 | 中国航空无线电电子研究所 | Corrosion-resistant magnesium alloy airborne avionics chassis |
| CN117684232A (en) * | 2024-02-02 | 2024-03-12 | 山西银光华盛镁业股份有限公司 | Local conductive oxidation treatment method based on magnesium alloy micro-arc oxidation |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1978712A (en) * | 2005-11-29 | 2007-06-13 | 重庆镁业科技股份有限公司 | Local screening method for nonferrous metal product micro arc oxidation |
| CN101760733A (en) * | 2010-01-28 | 2010-06-30 | 西安理工大学 | Magnesium alloy chemical nickel-plating surface treatment method taking microarc oxidation process as pretreatment |
| WO2010112914A1 (en) * | 2009-04-03 | 2010-10-07 | Keronite International Ltd | Process for the enhanced corrosion protection of valve metals |
| CN101914765A (en) * | 2010-08-31 | 2010-12-15 | 沈阳理工大学 | Method for preparing dark-colored ceramic membranes by chemical conversion-micro-arc oxidation of magnesium alloys |
| CN202103988U (en) * | 2010-12-24 | 2012-01-04 | 中兴通讯股份有限公司 | Magnesium alloy communication device |
| CN105543920A (en) * | 2015-12-10 | 2016-05-04 | 嘉瑞科技（惠州）有限公司 | Treatment method for preparing electric conducting coating layer on surface of magnesium alloy micro-arc oxidation layer |
| CN105803457A (en) * | 2014-12-30 | 2016-07-27 | 宁波瑞隆表面技术有限公司 | Preparation method of magnesium alloy surface micro-arc oxidation and chemical copper plating composite coating |
-
2017
- 2017-12-05 CN CN201711267956.8A patent/CN107955961B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1978712A (en) * | 2005-11-29 | 2007-06-13 | 重庆镁业科技股份有限公司 | Local screening method for nonferrous metal product micro arc oxidation |
| WO2010112914A1 (en) * | 2009-04-03 | 2010-10-07 | Keronite International Ltd | Process for the enhanced corrosion protection of valve metals |
| CN101760733A (en) * | 2010-01-28 | 2010-06-30 | 西安理工大学 | Magnesium alloy chemical nickel-plating surface treatment method taking microarc oxidation process as pretreatment |
| CN101914765A (en) * | 2010-08-31 | 2010-12-15 | 沈阳理工大学 | Method for preparing dark-colored ceramic membranes by chemical conversion-micro-arc oxidation of magnesium alloys |
| CN202103988U (en) * | 2010-12-24 | 2012-01-04 | 中兴通讯股份有限公司 | Magnesium alloy communication device |
| CN105803457A (en) * | 2014-12-30 | 2016-07-27 | 宁波瑞隆表面技术有限公司 | Preparation method of magnesium alloy surface micro-arc oxidation and chemical copper plating composite coating |
| CN105543920A (en) * | 2015-12-10 | 2016-05-04 | 嘉瑞科技（惠州）有限公司 | Treatment method for preparing electric conducting coating layer on surface of magnesium alloy micro-arc oxidation layer |
Non-Patent Citations (2)
| Title |
|---|
| 李金桂等: "《防腐蚀表面工程技术》", 31 January 2003 * |
| 杨丽: "镁合金微弧氧化深色膜的制备及性能检测", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983415A (en) * | 2019-12-30 | 2020-04-10 | 郑州轻研合金科技有限公司 | Magnesium-lithium alloy surface composite oxidation treatment method |
| CN110983415B (en) * | 2019-12-30 | 2021-12-07 | 郑州轻研合金科技有限公司 | Magnesium-lithium alloy surface composite oxidation treatment method |
| CN112064037A (en) * | 2020-10-13 | 2020-12-11 | 贵州电网有限责任公司 | Preparation method of corrosion-resistant magnesium alloy sacrificial anode |
| CN112195457A (en) * | 2020-10-13 | 2021-01-08 | 中国电子科技集团公司第二十研究所 | Magnesium-lithium alloy surface conductive anticorrosive coating and preparation method thereof |
| CN113755927A (en) * | 2021-09-29 | 2021-12-07 | 上海交通大学 | Magnesium neodymium alloy part and composite oxidation treatment method thereof |
| CN115522245A (en) * | 2022-08-12 | 2022-12-27 | 中国航空无线电电子研究所 | Corrosion-resistant magnesium alloy airborne avionics chassis |
| CN115491666A (en) * | 2022-09-07 | 2022-12-20 | 深圳市飞航精工科技有限公司 | Conductive oxidation process for magnesium alloy high-salt-spray test |
| CN117684232A (en) * | 2024-02-02 | 2024-03-12 | 山西银光华盛镁业股份有限公司 | Local conductive oxidation treatment method based on magnesium alloy micro-arc oxidation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107955961B (en) | 2019-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107955961B (en) | A kind of preparation method of Mg alloy surface conduction corrosion-inhibiting coating | |
| JP4686728B2 (en) | Method for producing magnesium or magnesium alloy product having an anodized film on the surface | |
| Fattah-Alhosseini et al. | Effect of KOH concentration on the microstructure and electrochemical properties of MAO-coated Mg alloy AZ31B | |
| CN102817063B (en) | Preparation method for light green superhydrophobic corrosion-resistant film on surface of magnesium-lithium alloy | |
| Rama Krishna et al. | Aqueous corrosion behavior of micro arc oxidation (MAO)-coated magnesium alloys: a critical review | |
| CN102732934B (en) | The method in aluminium alloy anode oxide film hole closed by a kind of silicon sol | |
| CN103993341B (en) | A kind of enclosure method of aluminium alloy anode oxide film | |
| CN107151810B (en) | Aluminium alloy extrusions and its manufacturing method | |
| CN107937903A (en) | A kind of preparation method of corrosive protection of aluminium alloy layer | |
| CN107955960A (en) | A kind of preparation method of aluminum alloy surface multiple-protection layer | |
| WO2014203919A1 (en) | Method for manufacturing magnesium alloy product | |
| Cheng et al. | Influence of DC current on corrosion behaviour of copper–aluminium composite plates | |
| CN106835129A (en) | The surface treatment method of Mg alloy that a kind of laser beam is combined with coated layer | |
| Mahapatro et al. | Determination of ionic liquid and magnesium compatibility via microscopic evaluations | |
| Shang et al. | Corrosion resistance and molecular dynamics behavior of the MAO/SAM composite coatings on magnesium alloy | |
| US20240076794A1 (en) | Metallic component with a ceramic coating | |
| CN110820029B (en) | Aluminum alloy conductive oxide film protective agent | |
| KR101516379B1 (en) | Surface treatment method for magnesium or magnesium alloy | |
| Tao et al. | Modification of Mg alloy surfaces based on micro-arc oxidation methods | |
| Shen et al. | Effect of current density on the microstructure and corrosion properties of MAO coatings on aluminum alloy shock absorber | |
| JP2000219975A (en) | SURFACE TREATED Mg ALLOY AND SURFACE TREATING METHOD THEREFOR | |
| Tao et al. | Surface modifications of Mg alloys based on micro-arc oxidation methods from manufacturing perspectives | |
| KR101135371B1 (en) | Chemical Coating Solutions for Magnesium Alloys and Magnesium Alloy Substrates thereby | |
| WO2024178456A1 (en) | Plasma electrolytic deposition surface coatings for oxide-forming alloys | |
| CN107988604A (en) | A kind of preparation method of aluminum alloy surface protective layer |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190910 Termination date: 20201205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |