WO2013169130A1 - Revêtements hybrides pour une protection améliorée contre la corrosion d'alliages de magnésium - Google Patents
Revêtements hybrides pour une protection améliorée contre la corrosion d'alliages de magnésium Download PDFInfo
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- WO2013169130A1 WO2013169130A1 PCT/PT2013/000026 PT2013000026W WO2013169130A1 WO 2013169130 A1 WO2013169130 A1 WO 2013169130A1 PT 2013000026 W PT2013000026 W PT 2013000026W WO 2013169130 A1 WO2013169130 A1 WO 2013169130A1
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- Prior art keywords
- coatings
- hybrid coatings
- corrosion
- coating
- magnesium alloys
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/086—Organic or non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Definitions
- the proposed invention concerns coatings for magnesium alloys used in automotive and aeronautic industry in order to improve their corrosion resistance.
- the three main components of the coatings are: a silane, an epoxy and an amine. It was proved that the coating can resist the immersion into a solution of 0.05 M sodium chloride (NaCl) during a month without any damage.
- the coating performance was evaluated through electrochemical impedance spectroscopy.
- Magnesium alloys are characterized by a unique set of properties (lightweight, high thermal conductivity, dimensional stability and damping characteristics, recyclability, %) [1-5], which make them valuable materials for many industrial applications, such as automotive and aerospace components, sporting goods, electronics and biocompatible implants.
- Mg alloys represent an excellent candidate because of their high strength-to-weight ratio.
- Literature on anti-corrosion coatings for Mg alloys is still poor if compared to aluminium and steel.
- Anodizing has proved to improve the corrosion resistance of the Mg alloys under aggressive environments, as anodic oxidation produces and oxide film with good corrosion resistance and reasonable adhesion properties [8-13] .
- layers obtained by anodization are porous and require an extra sealing layer, such as a sol-gel silane-based coating.
- anodizing has elevated costs, as it requires high current intensity and also a very efficient cooling system in order to avoid over-heating of the system. This translates into high energy consumption.
- the anodized film often presents defects, especially when the substrate material (magnesium alloys) has a complex geometry.
- Chromates-based coatings are also efficient anti- corrosion methods [16] . However, chromates-based treatments and coatings were banned and they are in the process of elimination from production because of their toxic effects on health and environment.
- sol-gel based organically modified silanes have attracted significant interest as versatile, easily processed coating materials with potential to replace chromate-based corrosion protection surface treatments for Mg alloys [1-3,17-24].
- sol-gel coatings represent an effective and environmentally friendly route to prepare films on metallic substrates at low cost.
- sol-gel route offers versatile ways to synthesize effective coatings with specific properties. Functionality is optimized by variation of experimental parameters such as chemical structure, composition and ratio of precursors and complexing agents, rate and conditions of hydrolysis, synthesis media, embedding of additional active species, aging and curing conditions, deposition procedure, etc... [3] .
- Sol-gel processed organic-inorganic hybrid coatings exhibit increased flexibility and thickness as compared to their inorganic counterparts.
- these sol-gel derived coatings have been found to provide good corrosion resistance to metal substrates due to their barrier properties, strong adhesion, chemical inertness, versatility in coating formulation, and ease of application under ambient temperature conditions [4,25].
- corrosion inhibitors are added to the system in order to provide added functionalities for improved performance and durability, with self-repair ability for damage recovery. The presence of additives should further decrease the corrosion rate.
- the concept is based on damage recovery from corrosion attack via controlled release of corrosion inhibitors stored in the organic coating with a specially designed assembly or simply dispersed in the polymeric matrix [2-4,18-21,26,27].
- US Patents by Ostrovsky [28,29] disclose a treatment for improved surface corrosion resistance of Mg and its alloys.
- the patents describe the acid pickling solutions for surface pretreatment and the compositions of water/organic solutions of hydrolyzed silanes.
- the coated magnesium alloys reveal the presence of corrosion pits after a period of 8-24 hours, because silane-only treatments (without additives) do not provide efficient protection of magnesium alloys.
- the treatments described in the patents [28-29] are mainly designed for the adhesion of paint or sealing of anodization, and they are not efficient for corrosion protection by themselves.
- Khramov et al. developed sol-gel processed organic- inorganic hybrid coatings with phosphonate functionalities [18,19]. Due to the chemical interaction between the phosphonate groups and the surface of magnesium substrate, these specially designed organo-silicate barrier coatings are expected to generate protective coatings with improved adhesion and corrosion resistance for magnesium materials.
- the organo-silicate sols were prepared via acid-catalyzed hydrolysis and condensation of a mixture of TetraEthOxySilane (TEOS) and DiethylPHosphonatoethyl-triethoxySilane (PHS) in ethanol/water solution at low water-to-silane ratio. Zhang et al.
- Lamaka et al. [3] developed hybrid organic-inorganic sol- gel coatings synthesized by copolymerization of epoxy- siloxane and titanium or zirconium alkoxides. Addition of Tris ( trimethylsilyl ) phosphate was also studied to improve the corrosion protection of the Mg alloy.
- hydrofluoric acid has received particular attention, due to the formation of a protective layer on the metal surface, which improves its corrosion resistance [32,33]. Coatings provide a barrier against corrosion attack; however, once the water reaches the metal/coating interface, delamination of the film might occur, together with formation of a defect due to gas evolution, which considerably decreases the protective properties. Hence, a pretreatment that removes the impurities, increases the hydrophobicity of the metal surface and enhances adhesion is necessary. HF is a good candidate for this purpose, as it provides these characteristics.
- the proposed invention concerns anti-corrosion coatings for magnesium alloys and their preparation method.
- it relates to the coatings composition, the films formed over the substrate and the anti-corrosion properties of the overall system when immersed in an aggressive electrolyte .
- the coating composition comprises a silane (e.g. AminoPropylTriEthoxySilane, APTES or
- AminoPropylTriMethoxySilane, APTMS AminoPropylTriMethoxySilane, APTMS
- an epoxy component e.g. Poly (bisphenol A-co-epichlorohydrin) , glycidyl end- capped
- an amine e.g. Diethylenetriamine, DETA
- the magnesium alloys that can be protected include, but are not limited to, alloys containing aluminium such as AZ31, AZ91 and AM60, alloys containing zinc such as ZK30, ZK60 and also alloys modified with rare earth metals such as WE43, WE45, Elektron 21 and ZE41.
- coating solutions can be applied to the magnesium alloys substrates by dip-coating or spraying, followed by thermal curing in a specific range of conditions.
- the thickness of the coating varies from 5 to 20 micrometers.
- the anti-corrosion performance of this set of coating is evaluated by immersing the final product in an aggressive environment such as NaCl for a long period of time and assessing the outcome through optical evaluation and electrochemical methods.
- electrochemical impedance spectroscopy EIS is used for analysis, as it gives the possibility to estimate the corrosion protection efficiency of coatings.
- the proposed invention can be applied to automotive and aerospace components, sporting material, electronic material and bio-compatible implants. Detailed description of the invention
- the present invention refers to a corrosion protection coating for magnesium alloys and its preparation method.
- the coatings composition the films formed on the substrate and the corrosion properties of the full system when immersed in an aggressive electrolyte.
- the coating solution object of this invention comprises three main ingredients: a silane (AminoPropylTriEthoxySilane , APTES or AminoPropylTriMethoxySilane, APTMS) , an epoxy component (Poly (bisphenol A-co-epichlorohydrin) , glycidyl end-capped) and an amine ( Diethylenetriamine, DETA) as cross linker.
- the silane and epoxy components are first prepared separately by diluting them in ethanol and acetone, and let stirring for 1 hour. Then the two solutions are mixed and the amine is added.
- the final concentration of the main components is between 1 to 10 wt% silane, preferably between 3 and 5%, between 5 and 50 wt% epoxy, preferably between 30 and 40 wt%, and between 0,5 and 10 wt% amine, preferably between 2 and 4 %.
- the solution is stirred for 1 to 6 hours before deposition on the substrate, which can be done by spraying or dipping.
- the preparation of the magnesium alloys herein designated by way of example as substrates consists of mechanical polishing with silicon/carbon paper, followed by chemical etching in 12% hydrofluoric acid (HF) for 15 minutes.
- This etching treatment is very efficient as it helps removing impurities on the alloy surface and forming Mg hydroxides, oxides and fluorides at the metal surface [25] . It is crucial for the formation of an efficient anti-corrosion coating.
- the coating is deposited on the magnesium alloys by dipping the substrate into the coating solution (dip- coating) . The substrate is immersed 3 times for 5 seconds each.
- the coated Mq alloys herein designated by way of example as samples, are cured in an oven at various temperatures between 120°C and 180°C, during a period of time between 0,5 and 5 hours, preferably between 1 and 2 hours.
- the thickness of the coatings obtained with the described procedure varies from 5 to 20 micrometers, depending on the specific conditions.
- the anti-corrosion properties of the final product coated magnesium alloys are evaluated through electrochemical impedance spectroscopy (EIS) measurements. These are performed at the open circuit potential (OCP) of the system under study, in the 10 5 Hz to 10 mHz frequency range, by means of a potentiostat in potentiostatic mode. The amplitude of the perturbation is lOmV rms .
- the electrochemical cell consists of a three-electrode setup: a saturated calomel electrode (SCE) as a reference, a platinum coil as a counter electrode, and the working electrode, which is the coated magnesium.
- SCE saturated calomel electrode
- platinum coil as a counter electrode
- the working electrode which is the coated magnesium.
- the measurements are performed in the electrolyte 0,05 M sodium chloride. Visual and optical inspections of the coated sample prove that after a month immersion the coated sample is intact and without any corrosion damage.
- Figure 1 represents the graphical evolution of electrochemical impedance as a function of time for the coated sample immersed in 0.05 M sodium chloride.
- the y-axis refers to the electrochemical impedance, expressed in Qcm 2 and the x- axis refers to frequency, expressed in Hz.
- phase angle refers to the phase, expressed in degrees
- x-axis refers to frequency, expressed in Hz.
- AeroMagnesium Lightweight solutions for aeronautics and defense. No web site da Aero-Magnesium Limited: http: / /www . magnesium- technologies . com/var/249/469488-Aero%20Mg%20Folder . pdf
- Magnesium Elektron Surface treatments for magnesium alloys in aerospace and defence - Datasheet: 256. No web site da Magnesium Elektron: http: //www.magnesium- elektron.com/data/downloads/DS256SU0. PDF 17. S. Y. Zhang, Q. Li, J. M. Fan, W. Kang, W. Hu, X. K. Yang. Novel composite films prepared by sol-gel technology for the corrosion protection of AZ91D magnesium alloy. Prog. Org. Coat., 66 (3): 328-335,. 2009.
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
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- Application Of Or Painting With Fluid Materials (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
L'invention concerne des revêtements anti-corrosions pour des alliages de magnésium, utilisés dans l'industrie automobile et aéronautique, et leur procédé de préparation. En particulier, elle concerne les compositions de revêtement, les films formés sur le substrat et les propriétés anti-corrosion du système global lorsqu'il est immergé dans un électrolyte agressif. De façon plus spécifique, les revêtements consistent en un constituant époxy (par exemple poly(bisphénol A-co-épichlorohydrine), à extrémité coiffée par glycidyle), un silane (par exemple l'AminoPropylTriEthoxysilane, APTES) et une amine (par exemple la Diéthylènetriamine, DETA), dans des solvants organiques. La solution de revêtement peut être appliquée sur des substrats d'alliages de magnésium par revêtement par immersion ou pulvérisation, suivi par un durcissement thermique dans une plage spécifique de conditions. L'épaisseur du revêtement varie de 5 à 20 micromètres. Les alliages de magnésium revêtus par de tels films possèdent une excellente résistance à la corrosion et après une immersion d'un mois dans du chlorure de sodium, leur performance est remarquablement plus élevée par comparaison à des revêtements classiques, tels que présentés dans l'état de la technique.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PT106302 | 2012-05-09 | ||
PT106302A PT106302A (pt) | 2012-05-09 | 2012-05-09 | Revestimentos híbridos para otimização da proteção anti-corrosiva de ligas de magnésio |
Publications (2)
Publication Number | Publication Date |
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WO2013169130A1 true WO2013169130A1 (fr) | 2013-11-14 |
WO2013169130A8 WO2013169130A8 (fr) | 2014-10-16 |
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PCT/PT2013/000026 WO2013169130A1 (fr) | 2012-05-09 | 2013-05-03 | Revêtements hybrides pour une protection améliorée contre la corrosion d'alliages de magnésium |
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PT (1) | PT106302A (fr) |
WO (1) | WO2013169130A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020068045A1 (fr) * | 2018-09-25 | 2020-04-02 | Hewlett-Packard Development Company, L.P. | Composites stratifiés d'alliage de magnésium pour dispositifs électroniques |
CN113913803A (zh) * | 2021-09-28 | 2022-01-11 | 中国人民解放军空军工程大学 | 镁合金化学转化复合膜及其制备方法 |
US11530362B2 (en) | 2020-04-23 | 2022-12-20 | The Boeing Company | Organosiloxane-based surface treatments for enhancing the adhesion and lubricity of metal surfaces |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106916510A (zh) * | 2017-03-27 | 2017-07-04 | 昆明理工大学 | 一种防碱性腐蚀涂料的制备方法 |
CN113667373A (zh) * | 2021-07-21 | 2021-11-19 | 潍坊东方钢管有限公司 | 硅烷改性纳米二氧化硅复合环氧树脂粉末涂料的制备方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4915978A (en) | 1986-08-27 | 1990-04-10 | Nukem Gmbh | Method and device for forming a layer by plasma-chemical process |
US4978432A (en) | 1988-03-15 | 1990-12-18 | Electro Chemical Engineering Gmbh | Method of producing protective coatings that are resistant to corrosion and wear on magnesium and magnesium alloys |
DE4205819A1 (de) * | 1992-02-26 | 1993-09-02 | Henkel Kgaa | Korrosionsfeste ueberzuege auf metalloberflaechen |
US5470664A (en) | 1991-02-26 | 1995-11-28 | Technology Applications Group | Hard anodic coating for magnesium alloys |
US5792335A (en) | 1995-03-13 | 1998-08-11 | Magnesium Technology Limited | Anodization of magnesium and magnesium based alloys |
WO2003069026A1 (fr) | 2002-02-13 | 2003-08-21 | Universite Pierre Et Marie Curie | Compositions pour le traitement d'alliages de magnesium. |
US6777094B2 (en) | 2001-06-28 | 2004-08-17 | Alonim Holding Agricultural Cooperative Society Ltd. | Treatment for improved magnesium surface corrosion-resistance |
WO2008150568A2 (fr) * | 2007-03-30 | 2008-12-11 | Ndsu Research Foundation | Revêtements hybrides préparés à partir de résines de carbamate de glycidyle |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4566702B2 (ja) * | 2004-11-12 | 2010-10-20 | オリジン電気株式会社 | マグネシウム合金用防錆塗料組成物およびこれからなる塗膜を有する物品 |
CN101885940B (zh) * | 2009-05-15 | 2012-08-29 | 北京化工大学 | 一种镁合金防腐蚀涂料及其制备方法 |
-
2012
- 2012-05-09 PT PT106302A patent/PT106302A/pt unknown
-
2013
- 2013-05-03 WO PCT/PT2013/000026 patent/WO2013169130A1/fr active Application Filing
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4915978A (en) | 1986-08-27 | 1990-04-10 | Nukem Gmbh | Method and device for forming a layer by plasma-chemical process |
US4978432A (en) | 1988-03-15 | 1990-12-18 | Electro Chemical Engineering Gmbh | Method of producing protective coatings that are resistant to corrosion and wear on magnesium and magnesium alloys |
US5470664A (en) | 1991-02-26 | 1995-11-28 | Technology Applications Group | Hard anodic coating for magnesium alloys |
DE4205819A1 (de) * | 1992-02-26 | 1993-09-02 | Henkel Kgaa | Korrosionsfeste ueberzuege auf metalloberflaechen |
US5792335A (en) | 1995-03-13 | 1998-08-11 | Magnesium Technology Limited | Anodization of magnesium and magnesium based alloys |
US6777094B2 (en) | 2001-06-28 | 2004-08-17 | Alonim Holding Agricultural Cooperative Society Ltd. | Treatment for improved magnesium surface corrosion-resistance |
US7011719B2 (en) | 2001-06-28 | 2006-03-14 | Alonim Holding Agricultural Cooperative Society Ltd. | Treatment for improved magnesium surface corrosion-resistance |
WO2003069026A1 (fr) | 2002-02-13 | 2003-08-21 | Universite Pierre Et Marie Curie | Compositions pour le traitement d'alliages de magnesium. |
US7094327B2 (en) | 2002-02-13 | 2006-08-22 | Univeriste Pierre Et Marie Curie | Compositions for the treatment of magnesium alloys |
WO2008150568A2 (fr) * | 2007-03-30 | 2008-12-11 | Ndsu Research Foundation | Revêtements hybrides préparés à partir de résines de carbamate de glycidyle |
Non-Patent Citations (30)
Title |
---|
"Aalberts Industries Material Technologies", MAGPASS-COAT@: CHROME-FREE PASSIVATION OF MAGNESIUM-BASED MATERIALS. NO WEB SITE DA MAMESTA, Retrieved from the Internet <URL:http://www.mamesta.nl/files/magpass- coat engl.pdf> |
"AeroMagnesium", AEROMAGNESIUM: LIGHTWEIGHT SOLUTIONS FOR AERONAUTICS AND DEFENSE, Retrieved from the Internet <URL:http://www.magnesium- technologies.com/var/249/469488-Aero%20Mg%20Folder.pd> |
"Magnesium Elektron", SURFACE TREATMENTS FOR MAGNESIUM ALLOYS IN AEROSPACE AND DEFENCE - DATASHEET: 256, Retrieved from the Internet <URL:http://www.magnesium- elektron.com/data/downloads/DS256SUO.PDF> |
A. F. GALIO; S. V. LAMAKA; M. L. ZHELUDKEVICH; L. F. P. DICK; I. L. MULLER; M. G. S. FERREIRA: "Inhibitor-doped sol-gel coatings for corrosion protection of magnesium alloy AZ31", SURF. COAT. TECHNOL., vol. 204, no. 9-10, 2010, pages 1479 - 1486, XP055071429, DOI: doi:10.1016/j.surfcoat.2009.09.067 |
A.N. KHRAMOV; J.A. JOHNSON: "Phosphonate-functionalized ormosil coatings for magnesium alloys", PROG. ORG. COAT., vol. 65, no. 3, 2009, pages 381 - 385, XP026122114, DOI: doi:10.1016/j.porgcoat.2009.03.001 |
A.N. KHRAMOV; V.N. BALBYSHEV; L.S. KASTEN; R.A. MANTZ: "Sol-gel coatings with phosphonate functionalities for surface modification of magnesium alloys", THIN SOLID FILMS, vol. 514, no. 1-2, 2006, pages 174 - 181, XP025005898, DOI: doi:10.1016/j.tsf.2006.02.023 |
BRUSCIOTTI F ET AL: "Hybrid epoxy-silane coatings for improved corrosion protection of Mg alloy", CORROSION SCIENCE, vol. 67, 24 October 2012 (2012-10-24), ELSEVIER BV [NL], pages 82 - 90, XP055071479, ISSN: 0010-938X, DOI: 10.1016/j.corsci.2012.10.013 * |
CHANG R-C ET AL: "Synthesis, characterization, and properties of novel organic/inorganic epoxy hybrids containing nitrogen/silicon via the sol-gel method", JOURNAL OF APPLIED POLYMER SCIENCE, vol. 106, no. 5, 17 August 2007 (2007-08-17), John Wiley & Sons, Inc. [US], pages 3290 - 3297, XP055071423, ISSN: 0021-8995, DOI: 10.1002/app.26994 * |
G. L. SONG; A. ATRENS: "Corrosion mechanisms of magnesium alloys", ADVANCED ENGINEERING MATERIALS, vol. 1, no. 1, 1999, pages 11 - 33 |
H. WANG; R. AKID; M. GOBARA: "Scratch-resistant anticorrosion sol-gel coating for the protection of AZ31 magnesium alloy via a low temperature sol-gel route", CORROS. SCI., vol. 52, no. 11, 2010, pages 2565 - 2570 |
I. OSTROVSKY; Y. HENN: "Present state and future of magnesium application in aerospace industry", NEW CHALLENGES IN AERONAUTICS, ASTEC '07, MOSCOW, 2007 |
J. E. GRAY; B. LUAN: "Protective coatings on magnesium and its alloys - a critical review", J. ALLOYS COMPD., vol. 336, no. 1-2, 2002, pages 88 - 113, XP004343802, DOI: doi:10.1016/S0925-8388(01)01899-0 |
J. HU; Q. LI; X. ZHONG; L. ZHANG; B. CHEN: "Composite anticorrosion coatings for AZ91D magnesium alloy with molybdate conversion coating and silicon sol-gel coatings", PROG. ORG. COAT., vol. 66, no. 3, 2009, pages 199 - 205, XP026640660, DOI: doi:10.1016/j.porgcoat.2009.07.003 |
M.F. MONTEMOR; M.G.S. FERREIRA: "Electrochemical study of modified bis-[triethoxysilylpropyl] tetrasulfide silane films applied on the AZ31 Mg alloy", ELECTROCHIM. ACTA, vol. 52, no. 27, 2007, pages 7486 - 7495, XP022207071, DOI: doi:10.1016/j.electacta.2006.12.086 |
N. SCHARNAGL; C. BLAWERT; W. DIETZEL: "Corrosion protection of magnesium alloy AZ31 by coating with poly(ether imides) (PEI", SURF. COAT. TECHNOL., vol. 203, no. 10-11, 2009, pages 1423 - 1428, XP025883549, DOI: doi:10.1016/j.surfcoat.2008.11.018 |
NAZIR T ET AL: "Thermally and mechanically superior hybrid epoxy-silica polymer films via sol-gel method", PROGRESS IN ORGANIC COATINGS, vol. 69, no. 1, September 2010 (2010-09-01), ELSEVIER BV [NL], pages 100 - 106, XP027122759, ISSN: 0300-9440, [retrieved on 20100619] * |
R. KAR; P.A. BONNEFOY; R. J.HANSMAN: "Dynamics of implementation of mitigating measures to reduce C02 emissions from commercial aviation", TECHNICAL REPORT NO. ICAT-2010-01, MIT INTERNATIONAL CENTER FOR AIR TRANSPORTATION (ICAT, June 2010 (2010-06-01) |
R.G.HU; S.ZHANG; J.F. BU; C.J. LIN; G.L. SONG: "Recent progress in corrosion of magnesium alloys by organic coatings", PROG. ORG. COAT., vol. 73, 2012, pages 129 - 141, XP028352203, DOI: doi:10.1016/j.porgcoat.2011.10.011 |
R.SUPPLIT; T.KOCH; ULRICH SCHUBERT: "Evaluation of the anti-corrosive effect of acid pickling and sol-gel coating on magnesium A231 alloy", CORROS. SCI., vol. 49, no. 7, 2007, pages 3015 - 3023, XP022086924, DOI: doi:10.1016/j.corsci.2007.02.006 |
S. V. LAMAKA; M. F. MONTEMOR; A. F. GALIO; M. L. ZHELUDKEVICH; C. TRINDADE; L. F. DICK; M. G. S. FERREIRA: "Novel hybrid sol-gel coatings for corrosion protection of AZ31B magnesium alloy", ELECTROCHIM. ACTA, vol. 53, no. 14, 2008, pages 4773 - 4783, XP022561496 |
S. Y. ZHANG; Q. LI; J. M. FAN; W. KANG; W. HU; X. K. YANG: "Novel composite films prepared by sol-gel technology for the corrosion protection of AZ91D magnesium alloy", PROG. ORG. COAT., vol. 66, no. 3, 2009, pages 328 - 335, XP026640677, DOI: doi:10.1016/j.porgcoat.2009.08.011 |
S. ZHANG; Q. LI; B. CHEN; X. YANG: "Preparation and corrosion resistance studies of nanometric sol-gel-based Ce02 film with a chromium-free pretreatment on AZ91D magnesium alloy", ELECTROCHIM. ACTA, vol. 55, no. 3, 2010, pages 870 - 877 |
S.J. XIA; R. YUE; R.G. RATEICK; V.I. BIRSS: "Electrochemical studies of AC/DC anodized Mg alloy in a NaCl Solution", J. ELECTROCHEM. SOC., vol. 151, no. 3, 2004, pages B179 - B187 |
S.V. LAMAKA; G. KN6RNSCHILD; D.V. SNIHIROVA; M.G. TARYBA; M.L. ZHELUDKEVICH; M.G.S. FERREIRA: "Complex anticorrosion coating for ZK30 magnesium alloy", ELECTROCHIM. ACTA, vol. 55, no. 1, 2009, pages 131 - 141, XP026670103, DOI: doi:10.1016/j.electacta.2009.08.018 |
SHI H ET AL: "Corrosion protection of AZ91D magnesium alloy with sol-gel coating containing 2-methyl piperidine", PROGRESS IN ORGANIC COATINGS, vol. 66, no. 3, November 2009 (2009-11-01), ELSEVIER BV [NL], pages 183 - 191, XP026640658, ISSN: 0300-9440, [retrieved on 20090820], DOI: 10.1016/J.PORGCOAT.2009.07.004 * |
T. F. DA CONCEICAO; N. SCHARNAGL; C. BLAWERT; W. DIETZEL; K. U. KAINER: "Surface modification of magnesium alloy AZ31 by hydrofluoric acid treatment and its effect on the corrosion behaviour", THIN SOLID FILMS, vol. 518, no. 18, 2010, pages 5209 - 5218 |
U.C. NWAOGU; C. BLAWERT; N. SCHARNAGL; W. DIETZEL; K.U. KAINER: "Effects of organic acid pickling on the corrosion resistance of magnesium alloy AZ31 sheet", CORROS. SCI., vol. 52, no. 6, 2010, pages 2143 - 2154, XP026994221 |
U.C. NWAOGU; C. BLAWERT; N. SCHARNAGL; W. DIETZEL; K.U. KAINER: "Influence of inorganic acid pickling on the corrosion resistance of magnesium alloy AZ31 sheet", CORROS. SCI., vol. 51, no. 11, 2009, pages 2544 - 2556, XP026665660, DOI: doi:10.1016/j.corsci.2009.06.045 |
V. BARRANCO; N. CARMONA; J. C. GALVAN; M. GROBELNY; L. KWIATKOWSKI; M. A. VILLEGAS: "Electrochemical study of tailored sol-gel thin films as pre-treatment prior to organic coating for AZ91 magnesium alloy", PROG. ORG. COAT., vol. 68, no. 4, 2010, pages 347 - 355, XP055071427, DOI: doi:10.1016/j.porgcoat.2010.02.009 |
X. GUO; M. AN; P. YANG; C. SU; Y. ZHOU: "Property characterization and formation mechanism of anticorrosion film coated on AZ31B Mg alloy by SNAP technology", J. SOL-GEL SCI. TECHNOL., vol. 52, no. 3, 2009, pages 335 - 347, XP019751338, DOI: doi:10.1007/s10971-009-2040-0 |
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WO2020068045A1 (fr) * | 2018-09-25 | 2020-04-02 | Hewlett-Packard Development Company, L.P. | Composites stratifiés d'alliage de magnésium pour dispositifs électroniques |
US11530362B2 (en) | 2020-04-23 | 2022-12-20 | The Boeing Company | Organosiloxane-based surface treatments for enhancing the adhesion and lubricity of metal surfaces |
CN113913803A (zh) * | 2021-09-28 | 2022-01-11 | 中国人民解放军空军工程大学 | 镁合金化学转化复合膜及其制备方法 |
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