CN108221027A - A kind of true black anodizing method of magnesium alloy - Google Patents
A kind of true black anodizing method of magnesium alloy Download PDFInfo
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- CN108221027A CN108221027A CN201810273804.7A CN201810273804A CN108221027A CN 108221027 A CN108221027 A CN 108221027A CN 201810273804 A CN201810273804 A CN 201810273804A CN 108221027 A CN108221027 A CN 108221027A
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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
- C25D11/30—Anodisation of magnesium or alloys based thereon
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Abstract
The present invention provides a kind of true black anodizing method of magnesium alloy, including：Pretreatment, anodic oxidation：Pretreated magnesium alloy workpiece is immersed in electrolyte, carries out anodic oxidation, electrolyte temperature is 20 40 DEG C, and using continuous current, current density is 1 1.5A, and final voltage is 150 180V；Ultrasound washing, drying.The electrolyte includes potassium hydroxide, aluminium hydroxide, potassium fluoride, ammonium molybdate, triethanolamine, in the electrolyte, concentration of potassium hydroxide is 10 30g/L, aluminum hydroxide concentration is 10 30g/L, a concentration of 1 3g/L of potassium fluoride, a concentration of 20 25g/L of ammonium molybdate, triethanolamine concentrations are 40 60ml/L.Electrolyte configuration is simple, and raw material is easy to get, the electrolytic method safe operation, and gained magnesium alloy can generate the true black film layer of dense uniform, and blackness is good.
Description
Technical field
A kind of true black anodizing method of magnesium alloy of the present invention, belongs to technical field of metal material surface treatment.
Background technology
Magnesium alloy is that the alloy that other elements form is added in by base of magnesium.Its main feature is that：Density is small, and specific strength is high, than bullet
Property modulus is big, and good heat dissipation, absorb shock resistance is good, absorbs impact that load-carrying ability is bigger than aluminium alloy, and the corrosive nature of resistance to organic matter and alkali is good.
Magnesium alloy is mainly used in the fields such as space flight and aviation, electronics and automobile, in order to improve the anti-corrosion ability of magnesium alloy device, beautification production
Product appearance and the requirement for meeting certain particular device surfaces light absorptive need Mg alloy surface being processed into black.
More and more extensive with the application of magnesium alloy, market is more and more harsh to the surface treatment demand of magnesium-alloy material,
1）Magnesium alloy easily aoxidizes in air since activity is higher, this brings very big difficulty to magnesium alloy pre-treatment, and pre-treatment is selected
Very oxidizing chemicals, perishable part select too weak chemicals, the not easy cleaning of the natural oxide film on surface
Totally, so as to influence the oxidation quality in later stage.
Magnesium alloy blackening process is used widely.Magnesium alloy blackening process mode mainly has at present：1. chemical oxidation is sent out
Black 2. anodic oxidation nigrescence 3. differential arc oxidations nigrescence etc..Chemical oxidation film layer corrosion resistance is poor, cannot increasingly meet market
It needs, and different to the treatment effect of different trade mark magnesium alloys；Existing anodic oxidation blackening mainly uses Cr VI
Salt has greater environmental impacts, and film layer is uneven, invalid to specific trade mark magnesium alloy.Black differential arc oxidation is of high cost, and pair sets
Have high requirement.
Invention content
The present invention provides a kind of true black anodizing method of magnesium alloy, electrolyte configuration is simple, and raw material is easy to get, should
Electrolytic method safe operation, the magnesium alloy handled by the anodizing technology can generate the true black film layer of dense uniform,
Color and luster is dense black.
A kind of true black anodizing electrolyte of magnesium alloy of the present invention, including potassium hydroxide, aluminium hydroxide, potassium fluoride, molybdenum
Sour ammonium, triethanolamine, in the electrolyte, concentration of potassium hydroxide 10-30g/L, aluminum hydroxide concentration 10-30g/L, fluorination
Potassium concn is 1-3g/L, a concentration of 20-25g/L of ammonium molybdate, triethanolamine concentrations 40-60ml/L.
Preferably, the electrolyte includes potassium hydroxide, aluminium hydroxide, potassium fluoride, ammonium molybdate, triethanolamine, the electricity
It solves in liquid, concentration of potassium hydroxide 20g/L, aluminum hydroxide concentration 20g/L, a concentration of 2g/L of potassium fluoride, ammonium molybdate are a concentration of
20g/L, triethanolamine concentrations 50ml/L.
The electrolyte using deionized water as solvent, the quality of electrolyte contained by a concentration of unit volume solution or
Volume.
A kind of true black anodizing method of magnesium alloy, includes the following steps：
Pretreatment：Carry out alkali cleaning, primary washing, pickling, the pretreatment of secondary washing process successively to magnesium alloy workpiece；
Anodic oxidation：Using stainless steel as cathode, pretreated magnesium alloy workpiece is immersed in electrolyte, carries out anodic oxygen
To change, oxidization time is 10-40 minute, and the electrolyte temperature is 20-40 DEG C, using continuous current, current density 1-1.5A,
Final voltage is 150-180V；
Ultrasound washing：By the magnesium alloy workpiece after anodic oxidation, room temperature ultrasonic wave water washing 1-5 minutes removes the electrolysis on its surface
Liquid, 120 DEG C drying 30 minutes to get.
The advantageous effect of the present invention compared with prior art：
（1）The magnesium alloy black galvanic couple anodic oxidation electrolyte component formula that technical scheme of the present invention provides, formula are simple easy
, raw material sources are extensive, and cost is relatively low, and in use, tank liquor is stable, is less prone to sediment, component safety and environmental protection,
The solderability in magnesium alloy metal product later stage is not influenced, it is convenient and practical suitable for the processing to magnesium alloy surface of metal product.
（2）A kind of true black anodizing electrolyte of magnesium alloy of the present invention, potassium fluoride can increase the electric conductivity of solution, molybdenum
For sour ammonium as blackening agent for surface, blackening effect is excellent, can effectively improve and improve oxidation film surface quality, makes the smooth light of film surface
It is clean, it can more deepen Film color, and improve colouring speeds so that treated that magnesium alloy blackness is fine for the technology of the present invention.Hydrogen
Aluminium oxide reacts generation sodium metaaluminate with sodium hydroxide, forms main film forming component, aluminium hydroxide can block established hair
Black film gap further improves corrosion resistance, increases glossiness.Triethanolamine plays complexing, improves the consistency of film layer and resistance to
Mill property, corrosion resistance.
（3）Anodizing technology of the present invention, the magnesium alloy of the technical finesse can generate the true black film layer of dense uniform,
Ensure that film forming procedure uniformly carries out using constant current oxidation, membranous layer property is uniform, ensures the faster speed of growth of film layer, one side energy
Matrix surface is made quickly to form oxidation film, on the other hand, oxidization time can be shortened.The current density item of this production technology selection
The oxidation film that is formed under part is fine and close, hardness is high.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail, but protection scope of the present invention is not
Be limited to these embodiments, it is every without departing substantially from the change of present inventive concept or equivalent substitute be included in protection scope of the present invention it
It is interior.
A kind of true black anodizing method of magnesium alloy, includes the following steps：
Pretreatment：Carry out alkali cleaning, primary washing, pickling, the pretreatment of secondary washing process successively to magnesium alloy workpiece；
Anodic oxidation：Using stainless steel as cathode, pretreated magnesium alloy workpiece is immersed in electrolyte, carries out anodic oxygen
To change, oxidization time is 10-40 minutes, and using continuous current, the electrolyte temperature is 20-40 DEG C, current density 1-1.5A,
Final voltage is 150-180V.
According to actual conditions, the oxidization time can be 10,15,20,25,30,35,40 minutes, the electrolyte temperature
Degree can be 20,25,30,35,40 DEG C, the current density can be 1,1.2,1.3,1.4,1.5A, the final voltage can
Think 150,160,170,180 V.
Ultrasound washing：By the magnesium alloy workpiece after anodic oxidation, room temperature ultrasonic wave water washing 1-5 minutes removes its surface
Electrolyte, 120 DEG C drying 30 minutes to get.
The electrolyte embodiment：
Embodiment 1
A kind of true black anodizing electrolyte of magnesium alloy of the present invention, the electrolyte include potassium hydroxide, aluminium hydroxide, fluorination
Potassium, ammonium molybdate, triethanolamine, in the electrolyte, concentration of potassium hydroxide 10g/L, aluminum hydroxide concentration 10g/L, fluorination
Potassium concn is 1g/L, a concentration of 20g/L of ammonium molybdate, triethanolamine concentrations 40ml/L.
The electrolyte is using deionized water as solvent, the quality or body of electrolyte contained by a concentration of unit volume solution
Product.
Embodiment 2
A kind of true black anodizing electrolyte of magnesium alloy of the present invention, the electrolyte include potassium hydroxide, aluminium hydroxide, fluorination
Potassium, ammonium molybdate, triethanolamine, in the electrolyte, concentration of potassium hydroxide 20g/L, aluminum hydroxide concentration 20g/L, fluorination
Potassium concn is 2g/L, a concentration of 20g/L of ammonium molybdate, triethanolamine concentrations 50ml/L.
The electrolyte is using deionized water as solvent, the quality or body of electrolyte contained by a concentration of unit volume solution
Product.
Embodiment 3
A kind of true black anodizing electrolyte of magnesium alloy of the present invention, the electrolyte include potassium hydroxide, aluminium hydroxide, fluorination
Potassium, ammonium molybdate, triethanolamine, in the electrolyte, concentration of potassium hydroxide 30g/L, aluminum hydroxide concentration 30g/L, fluorination
Potassium concn is 3g/L, a concentration of 25g/L of ammonium molybdate, triethanolamine concentrations 60ml/L.
The electrolyte is using deionized water as solvent, the quality or body of electrolyte contained by a concentration of unit volume solution
Product.
Embodiment 4
A kind of true black anodizing electrolyte of magnesium alloy of the present invention, the electrolyte include potassium hydroxide, aluminium hydroxide, fluorination
Potassium, ammonium molybdate, triethanolamine, in the electrolyte, concentration of potassium hydroxide 25g/L, aluminum hydroxide concentration 25g/L, fluorination
Potassium concn is 2g/L, a concentration of 22g/L of ammonium molybdate, triethanolamine concentrations 55ml/L.
The electrolyte is using deionized water as solvent, the quality or body of electrolyte contained by a concentration of unit volume solution
Product.
Wherein, potassium fluoride can increase the electric conductivity of solution, and for ammonium molybdate as blackening agent for surface, blackening effect is excellent, can have
Effect improves oxidation film surface quality, makes film surface smooth bright and clean, can more deepen Film color, and improves coloring speed
Degree so that treated that magnesium alloy blackness is fine for the technology of the present invention.Aluminium hydroxide reacts generation sodium metaaluminate, structure with sodium hydroxide
Into main film forming component, aluminium hydroxide can block established black film gap, further improve corrosion resistance, increase gloss
Degree.Triethanolamine plays complexing, improves the consistency of film layer and wearability, corrosion resistance.
The present invention is not limited by embodiment illustrated herein, and is to fit to and principles disclosed herein and novelty
The consistent widest range of feature.
Claims (4)
1. a kind of true black anodizing electrolyte of magnesium alloy, which is characterized in that the electrolyte component includes potassium hydroxide, hydrogen
Aluminium oxide, potassium fluoride, ammonium molybdate, triethanolamine, in the electrolyte, concentration of potassium hydroxide 10-30g/L, aluminium hydroxide are dense
It spends for 10-30g/L, a concentration of 1-3g/L of potassium fluoride, a concentration of 20-25g/L of ammonium molybdate, triethanolamine concentrations 40-60ml/L.
A kind of 2. true black anodizing electrolyte of magnesium alloy according to claim 1, which is characterized in that the electrolyte
Including potassium hydroxide, aluminium hydroxide, potassium fluoride, ammonium molybdate, triethanolamine, in the electrolyte, concentration of potassium hydroxide 20g/
L, aluminum hydroxide concentration be 20g/L, a concentration of 2g/L of potassium fluoride, a concentration of 20g/L of ammonium molybdate, triethanolamine concentrations 50ml/
L。
A kind of 3. true black anodizing electrolyte of magnesium alloy according to claim 1 or 2, which is characterized in that the electricity
Liquid is solved using deionized water as solvent, the quality and volume of electrolyte contained by a concentration of unit volume solution.
A kind of 4. true black anodizing method of magnesium alloy, which is characterized in that include the following steps：
Pretreatment：Carry out alkali cleaning, primary washing, pickling, the pretreatment of secondary washing process successively to magnesium alloy workpiece；
Anodic oxidation：Using stainless steel as cathode, pretreated magnesium alloy workpiece is immersed in electrolyte, carries out anodic oxygen
To change, oxidization time is 10-40 minute, and the electrolyte temperature is 20-40 DEG C, using continuous current, current density 1-1.5A,
Final voltage is 150-180V；
Ultrasound washing：By the magnesium alloy workpiece after anodic oxidation, room temperature ultrasonic wave water washing 1-5 minutes removes the electrolysis on its surface
Liquid, 120 DEG C drying 30 minutes to get.
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| CN201810273804.7A CN108221027A (en) | 2018-03-29 | 2018-03-29 | A kind of true black anodizing method of magnesium alloy |
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| CN201810273804.7A CN108221027A (en) | 2018-03-29 | 2018-03-29 | A kind of true black anodizing method of magnesium alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108588790A (en) * | 2017-11-24 | 2018-09-28 | 广灵县尚镁科技有限公司 | The method for oxidation of magnesium and magnesium alloy |
| CN110004477A (en) * | 2019-04-18 | 2019-07-12 | 西安强微电气设备有限公司 | A kind of electrolyte and the method for preparing Mg alloy surface black film layer with the electrolyte |
| CN110735172A (en) * | 2019-10-10 | 2020-01-31 | 佛山科学技术学院 | Preparation method of cerium-based coating on surface of magnesium alloys |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041904A (en) * | 2006-03-25 | 2007-09-26 | 鸿富锦精密工业（深圳）有限公司 | Magnesium product and its film plating method |
| CN101570875A (en) * | 2009-06-03 | 2009-11-04 | 哈尔滨工程大学 | Method for forming brown ceramic membrane on surface of Mg-Li alloy |
-
2018
- 2018-03-29 CN CN201810273804.7A patent/CN108221027A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041904A (en) * | 2006-03-25 | 2007-09-26 | 鸿富锦精密工业（深圳）有限公司 | Magnesium product and its film plating method |
| CN101570875A (en) * | 2009-06-03 | 2009-11-04 | 哈尔滨工程大学 | Method for forming brown ceramic membrane on surface of Mg-Li alloy |
Non-Patent Citations (6)
| Title |
|---|
| 丁玉荣等: "三乙醇胺对镁合金氧化膜层性能和微观结构的影响", 《表面技术》 * |
| 刘万辉: "《7N01铝合金微弧氧化处理及膜层质量评价》", 31 December 2016, 哈尔滨工业大学出版社 * |
| 刘妍等: "有机添加剂对镁合金阳极氧化膜性能的影响", 《腐蚀科学与防护技术》 * |
| 刘静安等: "《简明镁合金材料手册》", 31 August 2016, 冶金工业出版社 * |
| 曹湘洪等: "《中国工程院化工、冶金与材料工程学部第五届学术会议论文集》", 30 November 2005, 中国石化出版社 * |
| 欧爱良等: "三乙醇胺在镁合金阳极氧化中的作用", 《化工学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108588790A (en) * | 2017-11-24 | 2018-09-28 | 广灵县尚镁科技有限公司 | The method for oxidation of magnesium and magnesium alloy |
| CN110004477A (en) * | 2019-04-18 | 2019-07-12 | 西安强微电气设备有限公司 | A kind of electrolyte and the method for preparing Mg alloy surface black film layer with the electrolyte |
| CN110004477B (en) * | 2019-04-18 | 2021-03-23 | 西安强微电气设备有限公司 | Electrolyte and method for preparing black film on surface of magnesium alloy by using same |
| CN110735172A (en) * | 2019-10-10 | 2020-01-31 | 佛山科学技术学院 | Preparation method of cerium-based coating on surface of magnesium alloys |
| CN110735172B (en) * | 2019-10-10 | 2022-03-22 | 佛山科学技术学院 | Preparation method of cerium-based coating on magnesium alloy surface |
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