CN107740156A - A kind of plasma micro-arc oxidation colour epithelium preparation technology - Google Patents
A kind of plasma micro-arc oxidation colour epithelium preparation technology Download PDFInfo
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- CN107740156A CN107740156A CN201711083838.1A CN201711083838A CN107740156A CN 107740156 A CN107740156 A CN 107740156A CN 201711083838 A CN201711083838 A CN 201711083838A CN 107740156 A CN107740156 A CN 107740156A
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- Prior art keywords
- arc oxidation
- preparation technology
- sodium
- plasma micro
- electrolyte
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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
- C25D11/026—Anodisation with spark discharge
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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
-
- 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
- C25D11/14—Producing integrally coloured layers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of plasma micro-arc oxidation colour epithelium preparation technology, it is mainly comprised the following steps：Differential arc oxidation processing is carried out to metal unplated piece under alternating current conditions.The electrolyte used includes：2 5g/L highly basic, 2 10g/L electrolyte containing sodium, 1 8g/L stabilizers, 1 3g/L complexing agents and 0.5 5g/L rare earth salt additives.It is power supply using alternating current, alternating current electrolysis is carried out to the metal after oxidation in mixing salt solution, in bottom deposit metal, the metallic compound of oxide-film porous layer, the metal texture film of multicolour is generated to the scattering process of light by electrodeposit, a step is completed simultaneously with coloring for oxidation, has good light resistance, heat resistance, corrosion resistance and wearability compared to traditional chemical dyeing (organic dyestuff, inorganic dyestuff) Electrolytically coloured film.
Description
Technical field
The present invention relates to materials processing technology field, and in particular to a kind of plasma micro-arc oxidation colour epithelium prepares work
Skill.
Background technology
Show that global smart mobile phone sales volume is according to the report of well-known information technology research and consultant firm's statistics issue
1,400,000,000 are broken through, annual growth rate has been above 14%.Requirement of the people to the performance and outward appearance of mobile phone also more and more higher, gold
Belong to the trend that fuselage has turned into fashion.The metal surface treatment process of initial handset is anodic oxidation, and following mobile phone is golden
The trend that category fuselage is surface-treated is differential arc oxidization technique, at present the most of table using anodic oxidation of home-made cellphone
Face handling process.The plasma micro-arc oxidation colour epithelium technology that the present invention is researched and developed, is put using plasma in electrolyte
Film layer of the electrical phenomena in non-ferrous metal surface growth in situ into one layer of even compact, improve the metallicity of aluminium and aluminium alloy.Envelope
Close, aoxidize and synchronously completed with coloring, without dyeing, compared with traditional chemical dyes (organic dyestuff, inorganic dyestuff), electrolysis
Coloring film has good light resistance, heat resistance, corrosion resistance and wearability.In addition, the present invention can be to metal material or other
Material is covered, and its epithelium feel is finer and smoother, and metal-like is stronger.In addition, plasma can simultaneously high temperature hole sealing, surface without
Fade, do not produce pin hole, spot, silking, effectively shorten manufacturing time.
The content of the invention
The problem of existing for prior art, it is an object of the invention to provide a kind of plasma micro-arc oxidation colour epithelium
Preparation technology.
To achieve these goals, the present invention uses following technical scheme：
A kind of plasma micro-arc oxidation colour epithelium preparation technology, comprises the following steps：
(1) electrolyte is prepared：2-5g/L highly basic, 2-10g/L electrolyte containing sodium, 1-8g/L stabilizers, 1-3g/L complexing agents
With 0.5-5g/L rare earth salt additives；
(2) metal unplated piece is cleaned and dried；
(3) metal unplated piece is put into the electrolytic cell equipped with electrolyte；
(4) differential arc oxidation processing is carried out under alternating current conditions.
Preferably, the highly basic in the electrolyte is：Sodium hydroxide and/or potassium hydroxide.
Preferably, the electrolyte containing sodium is：One or more in sodium chloride, sodium metasilicate, sodium phosphate, sodium molybdate.
Preferably, the stabilizer is：Ethylene glycol and/or glycerine.
Preferably, the complexing agent is：In sodium ethylene diamine tetracetate, sodium tripolyphosphate, sodium pyrophosphate, calgon
It is one or more.
Preferably, the rare earth salt additives are：One or more in lanthanum nitrate, yttrium nitrate or cerous nitrate.
Preferably, the differential arc oxidation reaction condition is that current density is 2-20A/dm2, voltage range 100-600V,
Reaction time 10-40min, pH 5-12, electrolyte temperature are 15-50 DEG C.
Beneficial effects of the present invention：
(1) Electrolytically coloured film of the invention has good light resistance, heat resistance, corrosion resistance and wearability；
(2) film prepared by present invention process does not produce pin hole, spot, silking, effectively shortens manufacturing time；
(3) technique of the invention oxidation synchronously completes with coloring, without dyeing；
(4) present invention process condition is simple, require low to production equipment, production efficiency is high and green.
Embodiment
In order to preferably explain the present invention, it is described further in conjunction with specific examples below, but the present invention is unlimited
In specific embodiment.
Embodiment 1
A kind of plasma micro-arc oxidation colour epithelium preparation technology, step are as follows：
(1) 2g/L sodium hydroxides, 2g/L sodium chloride, 1g/L ethylene glycol, 1g/L sodium ethylene diamine tetracetates and 0.5g/L are prepared
The electrolyte of lanthanum nitrate, pH is measured as 7；
(2) metal unplated piece is cleaned and dried；
(3) metal unplated piece is put into the electrolytic cell equipped with electrolyte；
(4) alternating current voltage be 100V, current density 2A/dm2, electrolyte temperature be 15 DEG C under the conditions of carry out the differential of the arc
Oxidation processes 10min；
(5) film layer obtained by is careful smooth, in 3.5% sodium chloride solution soak at room temperature 400h, occurs without Hei Si or white rust.
Embodiment 2
A kind of plasma micro-arc oxidation colour epithelium preparation technology, step are as follows：
(1) 2g/L potassium hydroxide, 2g/L sodium metasilicate, 1g/L glycerine, 1g/L sodium tripolyphosphates and 0.5g/L yttrium nitrates are prepared
Electrolyte, measure pH as 8；
(2) metal unplated piece is cleaned and dried；
(3) metal unplated piece is put into the electrolytic cell equipped with electrolyte；
(4) alternating current voltage be 100V, current density 2A/dm2, electrolyte temperature be 15 DEG C under the conditions of carry out the differential of the arc
Oxidation processes 10min；
(5) film layer obtained by is careful smooth, in 3.5% sodium chloride solution soak at room temperature 400h, occurs without Hei Si or white rust.
Embodiment 3
A kind of plasma micro-arc oxidation colour epithelium preparation technology, step are as follows：
(1) 5g/L sodium hydroxides, 10g/L sodium chloride, 8g/L ethylene glycol, 3g/L sodium ethylene diamine tetracetates and 5g/L nitre are prepared
The electrolyte of sour lanthanum, pH is measured as 11；
(2) metal unplated piece is cleaned and dried；
(3) metal unplated piece is put into the electrolytic cell equipped with electrolyte；
(4) alternating current voltage be 600V, current density 20A/dm2, electrolyte temperature carries out micro- under the conditions of being 50 DEG C
Arc oxidation processes 40min；
(5) film layer obtained by is careful smooth, in 3.5% sodium chloride solution soak at room temperature 400h, occurs without Hei Si or white rust.
Embodiment 4
A kind of plasma micro-arc oxidation colour epithelium preparation technology, step are as follows：
(1) 5g/L potassium hydroxide, 10g/L sodium metasilicate, 8g/L glycerine, the electricity of 3g/L sodium pyrophosphates and 5g/L yttrium nitrates are prepared
Liquid is solved, measures pH as 11；
(2) metal unplated piece is cleaned and dried；
(3) metal unplated piece is put into the electrolytic cell equipped with electrolyte；
(4) alternating current voltage be 600V, current density 20A/dm2, electrolyte temperature carries out micro- under the conditions of being 50 DEG C
Arc oxidation processes 40min；
(5) film layer obtained by is careful smooth, in 3.5% sodium chloride solution soak at room temperature 400h, occurs without Hei Si or white rust.
Embodiment 5
A kind of plasma micro-arc oxidation colour epithelium preparation technology, step are as follows：
(1) 3g/L sodium hydroxides, 6g/L sodium metasilicate, 4g/L ethylene glycol, 2g/L sodium ethylene diamine tetracetates and 2g/L nitre are prepared
The electrolyte of sour lanthanum, pH is measured as 10；
(2) metal unplated piece is cleaned and dried；
(3) metal unplated piece is put into the electrolytic cell equipped with electrolyte；
(4) alternating current voltage be 300V, current density 10A/dm2, electrolyte temperature carries out micro- under the conditions of being 30 DEG C
Arc oxidation processes 30min；
(5) film layer obtained by is careful smooth, in 3.5% sodium chloride solution soak at room temperature 400h, occurs without Hei Si or white rust.
Embodiment 6
A kind of plasma micro-arc oxidation colour epithelium preparation technology, step are as follows：
(1) 3g/L potassium hydroxide, 6g/L sodium phosphates, 4g/L glyceryl alcohols, 2g/L calgons and 2g/L cerous nitrates are prepared
Electrolyte, measure pH as 10；
(2) metal unplated piece is cleaned and dried；
(3) metal unplated piece is put into the electrolytic cell equipped with electrolyte；
(4) alternating current voltage be 300V, current density 10A/dm2, electrolyte temperature carries out micro- under the conditions of being 30 DEG C
Arc oxidation processes 30min；
(5) film layer obtained by is careful smooth, in 3.5% sodium chloride solution soak at room temperature 400h, occurs without Hei Si or white rust.
The specific embodiment of the present invention is the foregoing is only, is not intended to limit the scope of the invention, every utilization
The equivalent transformation that the present invention makees, or other related technical fields are directly or indirectly used in, similarly it is included in the present invention's
Among scope of patent protection.
Claims (10)
1. a kind of plasma micro-arc oxidation colour epithelium preparation technology, it is characterised in that comprise the following steps：
(1) electrolyte is prepared；
(2) metal unplated piece is cleaned and dried；
(3) metal unplated piece is put into the electrolytic cell equipped with electrolyte；
(4) differential arc oxidation processing is carried out under alternating current conditions.
2. plasma micro-arc oxidation colour epithelium preparation technology according to claim 1, it is characterised in that step (1)
Described in electrolyte include：2-5g/L highly basic, 2-10g/L electrolyte containing sodium, 1-8g/L stabilizers, 1-3g/L complexing agents and 0.5-
5g/L rare earth salt additives.
3. plasma micro-arc oxidation colour epithelium preparation technology according to claim 2, it is characterised in that the highly basic
For sodium hydroxide and/or potassium hydroxide.
4. plasma micro-arc oxidation colour epithelium preparation technology according to claim 2, it is characterised in that described to contain sodium
Electrolyte is the one or more in sodium chloride, sodium metasilicate, sodium phosphate, sodium molybdate.
5. plasma micro-arc oxidation colour epithelium preparation technology according to claim 2, it is characterised in that the stabilization
Agent is ethylene glycol and/or glycerine.
6. plasma micro-arc oxidation colour epithelium preparation technology according to claim 2, it is characterised in that the complexing
Agent is the one or more in sodium ethylene diamine tetracetate, sodium tripolyphosphate, sodium pyrophosphate, calgon.
7. plasma micro-arc oxidation colour epithelium preparation technology according to claim 2, it is characterised in that the rare earth
Salt additives are the one or more in lanthanum nitrate, yttrium nitrate or cerous nitrate.
8. plasma micro-arc oxidation colour epithelium preparation technology according to claim 1, it is characterised in that step (4)
Described in alternating current parameter be that current density is 2-20A/dm2, voltage range 100-600V.
9. plasma micro-arc oxidation colour epithelium preparation technology according to claim 1, it is characterised in that step (4)
Described in differential arc oxidation treatment conditions be reaction time 10-40min, pH 5-12, electrolyte temperature is 15-50 DEG C.
10. plasma micro-arc oxidation colour epithelium preparation technology according to claim 1, it is characterised in that step (4)
Middle unplated piece makes unplated piece surface form fine and close thickness as negative electrode as anode, stainless steel plate under the conditions of differential arc oxidation
Micro-arc oxidation films.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083838.1A CN107740156A (en) | 2017-11-07 | 2017-11-07 | A kind of plasma micro-arc oxidation colour epithelium preparation technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083838.1A CN107740156A (en) | 2017-11-07 | 2017-11-07 | A kind of plasma micro-arc oxidation colour epithelium preparation technology |
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| CN107740156A true CN107740156A (en) | 2018-02-27 |
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| CN201711083838.1A Withdrawn CN107740156A (en) | 2017-11-07 | 2017-11-07 | A kind of plasma micro-arc oxidation colour epithelium preparation technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088966A (en) * | 2021-03-31 | 2021-07-09 | 中国兵器科学研究院宁波分院 | Magnesium alloy composite coating and preparation method thereof |
-
2017
- 2017-11-07 CN CN201711083838.1A patent/CN107740156A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088966A (en) * | 2021-03-31 | 2021-07-09 | 中国兵器科学研究院宁波分院 | Magnesium alloy composite coating and preparation method thereof |
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Application publication date: 20180227 |