CN103451700A - Sealing agent for micro-arc oxidation film - Google Patents
Sealing agent for micro-arc oxidation film Download PDFInfo
- Publication number
- CN103451700A CN103451700A CN2013103687317A CN201310368731A CN103451700A CN 103451700 A CN103451700 A CN 103451700A CN 2013103687317 A CN2013103687317 A CN 2013103687317A CN 201310368731 A CN201310368731 A CN 201310368731A CN 103451700 A CN103451700 A CN 103451700A
- Authority
- CN
- China
- Prior art keywords
- coupling agent
- arc oxidation
- encapsulant
- micro
- silane coupling
- 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
Abstract
The invention discloses a sealing agent for a micro-arc oxidation film. Alcohols solvents and little additives are added to prepare water-soluble liquid on the basis of a silane coupling agent, and the sealing agent is used for generating a nanometer protective layer on the surface of the oxidation film, so that discharge micropores of the micro-arc oxidation film can be effectively sealed and good corrosion resistance is achieved; the sealed surface of the micro-arc oxidation film has a good hydrophobic effect, is anti-scrubbing and anti-pollution, is matte, transparent and traceless, and has no sensory difference in appearance compared with that before micropore sealing.
Description
Technical field
The invention belongs to the metal material surface process field, be specifically related to a kind of encapsulant for micro-arc oxidation films, its preparation method and application.
Background technology
Lightweight is an important development direction of present material and mechanical field, and " with aluminium, for steel, with magnesium generation, moulding " is to realize light-weighted important channel.Present stage aluminium, magnesium and alloy in fields such as machinery, electric power, naval vessel, aerospace, widely applied, but these light metal corrosion protection deficiencies have hindered further applying of they.
The application that develops into the light metals such as aluminium, magnesium and alloy thereof of differential arc oxidization technique has brought new opportunity.Can generate fine and close ceramic coating at light metal surface by differential arc oxidization technique, thereby greatly improve anti-corrosion and wear resistance.Yet still there is difficult point in differential arc oxidization technique in the application in this field, maximum problem is that the ceramic coating generated contains the micropore produced in discharge process, causes oxide film that spot corrosion and/or absorption dust easily occur under severe environment and pollutes.Existing treatment process is mainly sprayed coating or the processing of encapsulant sealing of hole after differential arc oxidation.Yet, these methods are as unsatisfactory as the effect of notebook, phone housing for electronic product casing class appearance component, use the metal-like after rear product surface can lose differential arc oxidation, if and do not process, micro-arc oxidation films spot corrosion and surface contamination may occur again and lose operability and/or sight.In addition, conventional surface-closed coat-thickness is 10-20 μ m, can not meet the higher occasion of matching requirements and requires (the surface-closed coating must not surpass 1 μ m usually) as the assembly precision of space flight parts.
Therefore, research and development protection against corrosion, anti-pollution, inferior light, the transparent seamless membrane sealed agent of nano level and sealing technique have wide market outlook.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of protection against corrosion, anti-pollution, inferior light, the transparent seamless differential arc oxidation film sealant of nano level, its preparation method and application.
Encapsulant of the present invention be take silane coupling agent as basis, add the water soluble liq that alcoholic solvent and a small amount of additive are made.By its spraying or dipping, through hot setting, process, make its one deck of Surface Creation at oxide film nanometer film as thin as a wafer, and be penetrated in the micropore of micro-arc oxidation films.This film water white transparency, hydrophobic, good penetrability, sagging not, the dead angle noresidue also has good didirtresistance and good acidproof, alkaline-resisting, salt tolerant corrodible property simultaneously, utilizes the solidity to corrosion of the oxide film that this encapsulant processes to surpass more than 1000h.
Encapsulant for micro-arc oxidation films of the present invention is comprised of the component of following mass fraction: silane coupling agent 3-10, deionized water 5-10, pure 80-95, additive 0-3; Regulate the pH value to 4-5 or 9-10 with Glacial acetic acid.
Described silane coupling agent is one or more the mixture in methoxy silane coupling agent, Ethoxysilane coupling agent and amino silicane coupling agent.
Described alcohol is methyl alcohol or ethanol.Preferably, when described silane coupling agent is the methoxy silane coupling agent, alcohol is methyl alcohol; When silane coupling agent is Ethoxysilane coupling agent or amino silicane coupling agent, alcohol is ethanol.
Described additive is water soluble acrylic resin WA-610, and by Xi'an, excellent vertical metal surface treatment technology company limited produces.
The present invention also provides the preparation method of the above-mentioned encapsulant for micro-arc oxidation films, comprises the following steps:
5-10 part deionized water is poured in 80-95 part alcohol and stirred 2-3min, then getting silane coupling agent 3-10 part slowly adds in alcohol-water mixture and stirs 3-5min, add subsequently additive 0-3 part, finally drip Glacial acetic acid and regulate the pH value to 4-5 or 9-10, standing 24h after stirring 5min, obtain described encapsulant.
The present invention also provides the using method of described encapsulant: the parts after differential arc oxidation is processed are inserted in 80-100 ℃ of baking oven and are dried 20-30min; Then it is inserted in above-mentioned encapsulant and soaks 2-3min, pull out and drain raffinate; Put into baking oven at 120-150 ℃ of curing 30-40min, taking-up is dried and is got final product.
The present invention is applicable to all kinds of oxide films that obtain through differential arc oxidization technique, is specially adapted to light metal micro-arc oxidation films or the anode oxide films such as aluminium alloy, magnesium alloy.Utilize above-mentioned encapsulant, can form one deck nanometer silanol film of (50-80nm) as thin as a wafer on the oxide film surface, substantially do not change scantling; This membrane permeation power is extremely strong, effectively shutoff the electric discharge micropore of micro-arc oxidation films, solidity to corrosion is good; There are fabulous hydrophobic ability, anti-scouring, anti-pollution in surface after sealing of hole; Inferior light, transparent, seamless, outward appearance and sealing of hole are front without any sense organ difference.And the material of encapsulant is easily purchased, with low cost, simple to operate.
The accompanying drawing explanation
Fig. 1 is not condition of surface during sealing of hole and the salt-fog test photo of different time of 6063 aluminum alloy differential arc oxidation test specimens in embodiment 1.
Fig. 2 is the condition of surface after 6063 aluminum alloy differential arc oxidation test specimen sealing of holes and the salt-fog test photo of different time in embodiment 1.
Embodiment
Below with reference to embodiment, the present invention is described in further detail, but should not be understood as limiting the scope of the invention.
In embodiments of the present invention, corrosion test is carried out according to GB/T 10125 standards; Didirtresistance is tested by " notebook computer sprayed coating physical property characterization processes standard V1.7 " regulation; Thickness is pressed non-conductive cover thickness measurement-eddy current method on GB/T 4957 non-magnetic metal bodies and is measured.
Embodiment 1
Preparation encapsulant: remove 5 parts of ionized waters, add in 90 parts of ethanol and stir 2-3min, then add 4 parts of gamma-mercaptopropyltriethoxysilanes and stir 3-5min, then add 1 part of WA-610, drip 40% Glacial acetic acid and regulate pH value to 9.5, stir 5min, use after placement 24h.
Select the 6063 aluminium alloy test specimens that specification is 100mm * 100mm * 2mm, differential arc oxidation is processed 20min (the average 15 μ m of thickness), then with deionized water, clean up, dry 20min for 80-100 ℃, immerse subsequently in above-mentioned encapsulant and soak 2-3min, take out, insert 150 ℃ of curing 30min in baking oven after draining raffinate.
Product performance are tested, drawn the following conclusions.
(1) solidity to corrosion: Fig. 1 is not condition of surface during sealing of hole and the salt-fog test photos of different time of 6063 aluminum alloy differential arc oxidation test specimens; Fig. 2 is condition of surface after sealing of hole and the salt-fog test photo of different time.Hot spot all appears in the differential arc oxidation test specimen 480h positive and negative of processing without sealing of hole as we can see from the figure; And do not find yet hot spot after the test specimen 1000h after sealing treatment.
(2) outward appearance: by the direct observation of eyesight, can find out, before and after sealing, the outward appearance of product, without any sense organ difference, specifically can contrast the apparent state of sealing of hole front and back, sees that Fig. 1 tests front A, B photo and Fig. 2 and tests front A, B photo.
(3) didirtresistance:
The test article: 1) beverage: Coffee(nest is two-in-one), Coca-Cola, tea, milk; 2) 5% white cat board sanitising agent; 3) 1% Glacial acetic acid; 4) edible sesame oil.
Method: use 100% the soft white gauze of cotton textiles folded 5 layers (30*30mm), soak above-mentioned article fully, be put on the test specimen surface of sealing of hole, then cover with lens.Through 15min, 1h, after 2h, wiped clean, observe surface.
Test article: 1) lipstick (Lancome Red); 2) water-based ink.
Method: evenly be applied to test surfaces, be not less than 15*15mm, after 2h, wiped clean, observation test surface.
Adopt above-mentioned two class article to be tested, the phenomenons such as testing surface is not found to damage, shade and softening, dissolving, and find no color and be transferred on clothing or finger.
(4) sealer coat: the average film thickness of mensuration is 65nm.
Embodiment 2
Preparation encapsulant: remove 6.5 parts of ionized waters, add in 90 parts of methyl alcohol and stir 2-3min, then add 3 parts of γ-mercaptopropyl trimethoxysilanes and stir 3-5min, then add 0.5 part of WA-610 and stir 1-2min, drip 40% Glacial acetic acid and regulate pH value to 4.5, use after placement 24h.
The 5083 aluminium alloy test specimen differential arc oxidations of specification 100mm * 50mm * 2mm are processed to the average 12 μ m of 15min(thickness) after, with deionized water, clean up, dry 20min for 80-100 ℃, immerse subsequently 2-3min in above-mentioned encapsulant, take out, insert 130 ℃ of curing 40min in baking oven after draining raffinate.
After processing, the dependence test of product is undertaken by embodiment 1.Before and after sealing, the outward appearance of micro-arc oxidation films changes without any sense organ; Salt-fog test horizontal exceeding 1000h; The regulation of didirtresistance agreement with experimental " notebook computer sprayed coating physical property characterization processes standard V1.7 "; Measure sealer coat thickness 70nm.
Embodiment 3
Preparation encapsulant: remove 8 parts of ionized waters, add in 86 parts of methyl alcohol and stir 2-3min, add again 3 parts of γ-mercaptopropyl trimethoxysilanes and 2 parts of γ-glycidyl ether oxygen propyl trimethoxy silicanes and stir 3-5min, then add 1 part of WA-610 and stir 1-2min, drip 40% Glacial acetic acid and regulate pH value to 4.5, use after placement 24h.
After the ZL102 aluminum alloy casting differential arc oxidation of φ 100mm * 5mm is processed to 25min (thickness 20 μ m), clean up with deionized water, dry 20min, immerse subsequently 2-3min in above-mentioned encapsulant for 80-100 ℃, take out, insert 130 ℃ of curing 40min in baking oven after draining raffinate.
After processing, the dependence test of product is undertaken by embodiment 1.Before and after sealing, the outward appearance of micro-arc oxidation films changes without any sense organ; Salt-fog test horizontal exceeding 1000h; The regulation of didirtresistance agreement with experimental " notebook computer sprayed coating physical property characterization processes standard V1.7 "; Measure sealer coat thickness 58nm.
Claims (8)
1. the encapsulant for micro-arc oxidation films, be comprised of the component of following mass fraction: silane coupling agent 3-10, deionized water 5-10, pure 80-95, additive 0-3; Regulate the pH value to 4-5 or 9-10 with Glacial acetic acid.
2. encapsulant claimed in claim 1, is characterized in that, described silane coupling agent is one or more the mixture in methoxy silane coupling agent, Ethoxysilane coupling agent and amino silicane coupling agent.
3. the described encapsulant of claim 1 or 2, is characterized in that, described alcohol is methyl alcohol or ethanol.
4. the described encapsulant of any one in claim 1-3, is characterized in that, when described silane coupling agent is the methoxy silane coupling agent, alcohol is methyl alcohol; When silane coupling agent is Ethoxysilane coupling agent or amino silicane coupling agent, alcohol is ethanol.
5. encapsulant claimed in claim 1, is characterized in that, described additive is water soluble acrylic resin WA-610
.
6. the preparation method of the described encapsulant for micro-arc oxidation films of claim 1 comprises the following steps:
5-10 part deionized water is poured in 80-95 part alcohol and stirred 2-3min, then getting silane coupling agent 3-10 part slowly adds in alcohol-water mixture and stirs 3-5min, add subsequently additive 0-3 part, finally drip Glacial acetic acid and regulate the pH value to 4-5 or 9-10, standing 24h after stirring 5min, obtain described encapsulant.
7. the using method of the described encapsulant for micro-arc oxidation films of claim 1: the parts after differential arc oxidation is processed are inserted 80-100 ℃ of baking oven dries 20-30min; Then it is inserted in above-mentioned encapsulant and soaks 2-3min, pull out and drain raffinate; Put into baking oven at 120-150 ℃ of curing 30-40min, taking-up is dried and is got final product.
8. using method claimed in claim 7, is characterized in that, the parts after described differential arc oxidation is processed are the parts of the light metals such as aluminium alloy, magnesium alloy after differential arc oxidation is processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103687317A CN103451700A (en) | 2013-08-21 | 2013-08-21 | Sealing agent for micro-arc oxidation film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103687317A CN103451700A (en) | 2013-08-21 | 2013-08-21 | Sealing agent for micro-arc oxidation film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103451700A true CN103451700A (en) | 2013-12-18 |
Family
ID=49734518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103687317A Pending CN103451700A (en) | 2013-08-21 | 2013-08-21 | Sealing agent for micro-arc oxidation film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103451700A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060261A (en) * | 2014-05-26 | 2014-09-24 | 安徽红桥金属制造有限公司 | Zinc-plating sealing agent and preparation method thereof |
| CN104451821A (en) * | 2014-11-15 | 2015-03-25 | 北京化工大学 | Method for carrying out hole sealing treatment on anodic alumina, component of overhead contact system of electric railway, by using silane coupling agent |
| US9506161B2 (en) | 2014-12-12 | 2016-11-29 | Metal Industries Research & Development Centre | Surface treatment of a magnesium alloy |
| CN107236978A (en) * | 2016-07-09 | 2017-10-10 | 平顶山市美伊金属制品有限公司 | The enclosure method of the packing material and pore of closing oxidation rear substrate surface pore |
| CN108286065A (en) * | 2018-02-28 | 2018-07-17 | 中南大学 | A kind of preparation method with insulation and the aluminium alloy oil drilling pipe screw joint of wear and corrosion behavior |
| CN109055841A (en) * | 2018-09-06 | 2018-12-21 | 中国石油大学(华东) | Cast solvable composite material of magnesium alloy pressure break ball surface protective layer preparation method |
| CN109112520A (en) * | 2017-06-26 | 2019-01-01 | 平顶山市美伊金属制品有限公司 | A kind of reinforcement process of metalwork surface conversion coating |
| CN110373698A (en) * | 2019-08-14 | 2019-10-25 | 桂林理工大学 | A method of differential arc oxidation/graphene/silicon alkane laminated film is prepared in aluminum alloy surface |
| CN110396709A (en) * | 2019-08-14 | 2019-11-01 | 桂林理工大学 | A method of differential arc oxidation/graphene oxide/silane laminated film is prepared in aluminum alloy surface |
| CN110565148A (en) * | 2019-09-27 | 2019-12-13 | 佛山市南海双成金属表面技术有限公司 | Magnesium alloy black micro-arc oxidation film nano passivator and passivation method |
| CN110923781A (en) * | 2019-12-13 | 2020-03-27 | 湖南湘投金天科技集团有限责任公司 | Surface treatment method for reducing galvanic current of titanium and titanium alloy |
| CN112646429A (en) * | 2020-12-24 | 2021-04-13 | 西安凯美泰科环保科技有限公司 | Sealing agent for micro-arc oxidation film layer and preparation method thereof |
| CN114717630A (en) * | 2022-03-18 | 2022-07-08 | 江门市优博科技有限公司 | Novel environment-friendly sealing agent for aluminum and aluminum alloy anodic oxide film and preparation method thereof |
| CN114717630B (en) * | 2022-03-18 | 2024-05-10 | 江门市优博科技有限公司 | Environment-friendly sealing agent for aluminum and aluminum alloy anodic oxide film and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002127299A (en) * | 2000-10-30 | 2002-05-08 | Dainippon Printing Co Ltd | Packaging material |
| CN101413139A (en) * | 2007-10-18 | 2009-04-22 | 比亚迪股份有限公司 | Aluminum alloy including differential arc oxidation film and preparation thereof |
| CN102703892A (en) * | 2012-01-14 | 2012-10-03 | 哈尔滨工程大学 | Microarc-oxidized coating silylation fluid and hole sealing method thereby |
-
2013
- 2013-08-21 CN CN2013103687317A patent/CN103451700A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002127299A (en) * | 2000-10-30 | 2002-05-08 | Dainippon Printing Co Ltd | Packaging material |
| CN101413139A (en) * | 2007-10-18 | 2009-04-22 | 比亚迪股份有限公司 | Aluminum alloy including differential arc oxidation film and preparation thereof |
| CN102703892A (en) * | 2012-01-14 | 2012-10-03 | 哈尔滨工程大学 | Microarc-oxidized coating silylation fluid and hole sealing method thereby |
Non-Patent Citations (1)
| Title |
|---|
| 孙明志: ""化学镀镍磷合金镀层封孔工艺及耐蚀性能研究"", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060261B (en) * | 2014-05-26 | 2016-08-24 | 安徽红桥金属制造有限公司 | A kind of zinc-plated sealer and preparation method thereof |
| CN104060261A (en) * | 2014-05-26 | 2014-09-24 | 安徽红桥金属制造有限公司 | Zinc-plating sealing agent and preparation method thereof |
| CN104451821B (en) * | 2014-11-15 | 2019-01-29 | 北京化工大学 | A method of sealing pores being carried out to electrification railway contact net component anodised aluminium with silane coupling agent |
| CN104451821A (en) * | 2014-11-15 | 2015-03-25 | 北京化工大学 | Method for carrying out hole sealing treatment on anodic alumina, component of overhead contact system of electric railway, by using silane coupling agent |
| US9506161B2 (en) | 2014-12-12 | 2016-11-29 | Metal Industries Research & Development Centre | Surface treatment of a magnesium alloy |
| CN107236978A (en) * | 2016-07-09 | 2017-10-10 | 平顶山市美伊金属制品有限公司 | The enclosure method of the packing material and pore of closing oxidation rear substrate surface pore |
| CN109112520B (en) * | 2017-06-26 | 2021-02-05 | 平顶山市美伊金属制品有限公司 | Strengthening process of conversion coating on surface of metal piece |
| CN109112520A (en) * | 2017-06-26 | 2019-01-01 | 平顶山市美伊金属制品有限公司 | A kind of reinforcement process of metalwork surface conversion coating |
| CN108286065A (en) * | 2018-02-28 | 2018-07-17 | 中南大学 | A kind of preparation method with insulation and the aluminium alloy oil drilling pipe screw joint of wear and corrosion behavior |
| CN108286065B (en) * | 2018-02-28 | 2019-07-23 | 中南大学 | A kind of preparation method of the aluminium alloy oil drilling pipe screw joint with insulation and wear and corrosion behavior |
| CN109055841B (en) * | 2018-09-06 | 2020-08-25 | 中国石油大学(华东) | Preparation method of surface protective layer of fracturing ball made of cast soluble magnesium alloy composite material |
| CN109055841A (en) * | 2018-09-06 | 2018-12-21 | 中国石油大学(华东) | Cast solvable composite material of magnesium alloy pressure break ball surface protective layer preparation method |
| CN110373698A (en) * | 2019-08-14 | 2019-10-25 | 桂林理工大学 | A method of differential arc oxidation/graphene/silicon alkane laminated film is prepared in aluminum alloy surface |
| CN110396709A (en) * | 2019-08-14 | 2019-11-01 | 桂林理工大学 | A method of differential arc oxidation/graphene oxide/silane laminated film is prepared in aluminum alloy surface |
| CN110565148A (en) * | 2019-09-27 | 2019-12-13 | 佛山市南海双成金属表面技术有限公司 | Magnesium alloy black micro-arc oxidation film nano passivator and passivation method |
| CN110923781A (en) * | 2019-12-13 | 2020-03-27 | 湖南湘投金天科技集团有限责任公司 | Surface treatment method for reducing galvanic current of titanium and titanium alloy |
| CN110923781B (en) * | 2019-12-13 | 2021-09-07 | 湖南湘投金天科技集团有限责任公司 | Surface treatment method for reducing galvanic current of titanium and titanium alloy |
| CN112646429A (en) * | 2020-12-24 | 2021-04-13 | 西安凯美泰科环保科技有限公司 | Sealing agent for micro-arc oxidation film layer and preparation method thereof |
| CN114717630A (en) * | 2022-03-18 | 2022-07-08 | 江门市优博科技有限公司 | Novel environment-friendly sealing agent for aluminum and aluminum alloy anodic oxide film and preparation method thereof |
| CN114717630B (en) * | 2022-03-18 | 2024-05-10 | 江门市优博科技有限公司 | Environment-friendly sealing agent for aluminum and aluminum alloy anodic oxide film and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103451700A (en) | Sealing agent for micro-arc oxidation film | |
| Tian et al. | The failure behaviour of a commercial highly pigmented epoxy coating under marine alternating hydrostatic pressure | |
| Tavandashti et al. | Corrosion study of hybrid sol–gel coatings containing boehmite nanoparticles loaded with cerium nitrate corrosion inhibitor | |
| CN102703892B (en) | Microarc-oxidized coating silylation fluid and hole sealing method thereby | |
| CN102079947A (en) | Preparation method of titanium alloy surface sol-gel conversion film | |
| JP2016515154A (en) | Environment-curing and corrosion-resistant sol-gel coatings and compositions and methods for their production | |
| JP2016515154A5 (en) | ||
| CN109486416A (en) | A kind of oxidation film silanization treatment method | |
| CN105734547A (en) | Environment-friendly metal surface treating agent and preparation method thereof | |
| CN106756976A (en) | Silane compound and its application for chemical composition coating post processing | |
| CN103993303A (en) | Trivalent-chromium anticorrosive passivating solution of aluminium and aluminium alloy | |
| JP2017147336A (en) | Method for forming colored film | |
| CN103993341A (en) | Sealing method of aluminum alloy anode oxidized film | |
| CN105524548A (en) | Water-based, environment-friendly and high-temperature coating and preparation method thereof | |
| Kirtay | Characterization of SiO 2-TiO 2 Hybrid corrosion protective coatings on mild steel | |
| CN106119926A (en) | A kind of ceramic coating formed by micro-arc oxidation and preparation method thereof | |
| RU2008121876A (en) | OBTAINING COATED SUBSTRATES | |
| CN109183018A (en) | A kind of copper foil chromium-free passivation liquid and preparation method thereof | |
| WO2016173236A1 (en) | Water resistant and salt-fog resistant plastic printing ink and preparation method therefor | |
| CN102277086B (en) | Environment-friendly chrome-free fingerprint-resistant treating agent for stainless steel | |
| CN105238127B (en) | One kind exempts from roasting type anti-fingerprint coating additive and its application method | |
| CN105647384A (en) | Metakaolin-based paint coating and preparation method thereof | |
| CN105200494A (en) | Nickel-free hole sealing agent for easy-to-film antibacterial aluminum alloy anodic oxide film and preparation method thereof | |
| CN105238205A (en) | Waterborne epoxy self-leveling floor paint and preparation method therefor | |
| CN108165970A (en) | A kind of preparation method of environment-friendly chromium-free resistance and fingerprint resistance passivating solution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131218 |