EP1029953B1 - Procédé de preparation de surface et de dépôt de polyaniline pour absorber la lumière - Google Patents
Procédé de preparation de surface et de dépôt de polyaniline pour absorber la lumière Download PDFInfo
- Publication number
- EP1029953B1 EP1029953B1 EP00400295A EP00400295A EP1029953B1 EP 1029953 B1 EP1029953 B1 EP 1029953B1 EP 00400295 A EP00400295 A EP 00400295A EP 00400295 A EP00400295 A EP 00400295A EP 1029953 B1 EP1029953 B1 EP 1029953B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polyaniline
- titanium
- deposition
- minutes
- deposit
- 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.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/38—Pretreatment of metallic surfaces to be electroplated of refractory metals or nickel
Definitions
- the invention lies in the field of devices with an absorbent coating radiation, especially a polyaniline coating absorbing radiation in a band from ultraviolet to infrared. It also concerns a process for preparing the surfaces receiving the deposit.
- a wide variety of surface treatments or surface coatings with only a low specular reflection and having only a weak reflection diffuse is known. These treatments or coatings are sought in particular for applications optical or infrared. They help ensure that mechanical elements such as optical supports input of optical devices do not reflect or little light and so do not increase the ratio signal / noise of the optical or infrared signal picked up by the detectors of these devices.
- black paints we knows that they tend to crack or crack detach from the particularly metallic substrate, due to stresses induced by cycles especially for infrared systems who often work with sensors cooled to the temperature of helium or liquid nitrogen.
- Degassing products can react chemically and damage components microelectronics or to condense on cooled optical surfaces and darken them.
- the method provides a surface treatment by a jet of aluminum oxide with a particle size 100 to 200 mesh. This initial processing is intended to create a roughness of the surface before anodizing.
- the present invention is under a first aspect directed towards such a roughening treatment.
- the applicant has carried out experiments in which a polyaniline was used as absorbent coating.
- Polyaniline was found to have actually good absorbent qualities, however, the total reflection value remains high in the infrared. Adhesion to the substrate is not good. The tendency to laminate the layer is certain.
- the invention relates to a process for preparing the surface of a substrate intended to receive a polyaniline layer, absorbent in the ultraviolet to infrared, characterized in that the surface of the substrate is roughened before the stages of deposition of the polyaniline layer.
- This Ra value can be obtained by example on a titanium substrate by sandblasting with a abrasive. This can be done with corundum with a particle size between 30 and 120 mesh.
- the sandblasting was made with such a corundum, under a pressure of 6 bars at a distance from the surface to be treated of approximately 20 cm.
- a double pass was made with a rate 100% recovery.
- This initial substrate preparation phase is necessary to decrease or even remove the peak specular reflection in the infrared.
- the deposit aniline, according to a second aspect of the invention can be carried out after this preparatory phase relating to obtaining the roughness of the substrate surface. It may also not be performed if the value specular absorption or reflection obtained without this roughening treatment are judged sufficient.
- the acid proportions could be increased and the duration of the bath decreased, or they could be reduced, the duration of the bath remaining equivalent, but the temperature of the bath being increased.
- the part to be processed, in the laboratory is the working electrode of a three cell electrodes (against stainless steel electrode and saturated calomel reference electrode (ECS)).
- ECS saturated calomel reference electrode
- the alloy is polarized at -0.5 V / DHW for 3 min, then then subjected to anodic scanning at the speed of 10 mV / s until the imposed voltage reaches +2 V / DHW. The scanning is then stopped, but the polarization maintained for 20 minutes.
- the indicated voltages are measured between the calomel reference electrode and the job.
- test pieces After electropolymerization, the test pieces can be steamed at a temperature between 40 ° and 160 ° for a period of between 30 min and 2 hours, for example 1 hour at 160 ° C.
- the NaFHF conversion treatment leaves the surface of the alloy a small amount of fluorine than the hydrolysis treatment makes it possible to decrease but not to totally eliminate.
- This hydrolysis treatment seems favor the speed of formation of the deposit of polyaniline.
- the induction time is shorter and the quantity deposited after a given holding time more important.
- the roughness of the surface of the titanium alloy was changed by sandblasting.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Chemical Treatment Of Metals (AREA)
- Chemically Coating (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Laminated Bodies (AREA)
- Optical Filters (AREA)
- ing And Chemical Polishing (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
- un décapage fluonitrique ;
- un traitement de conversion chimique ;
- une hydrolyse ; et
- un dépôt de polyaniline par électropolymérisation.
- figure 1a : avec un grossissement de 40
- figure 1b : avec un grossissement de 400
- figure 1c : avec un grossissement de 2000
- figure 2a : avec un grossissement de 40
- figure 2b : avec un grossissement de 400
- figure 2c : avec un grossissement de 2000
- figure 3 pour de la polyaniline déposée selon le procédé de l'invention sans sablage préalable ;
- figure 4 avec sablage préalable.
- Tripolyphosphate de sodium Na5P3O10 : 40 g/l
- Tétraborate de sodium Na2B4O7, 10 H2O : 40 g/l
- Tensioactif ref. 631 : 10 ml/l
- Soude NaOH : pH=9
- Température de fonctionnement : 60°C
- Durée : 10 minutes
- Acide nitrique 41° Bé HNO3 : 141 ml
- Acide fluorhydrique (48%) HF : 50 ml
- Additif F 68 : 1 g
- TA6V (métal) 1,5 g
- Eau distillée qsp : 11.
- Température de fonctionnement : 20°C
- Durée : 2 mns 15s
- Bifluorure de sodium NaFHF : 13 g/l
- Température de fonctionnement : 20°C
- Durée 1 min 45s
- eau déminéralisée
- Température de fonctionnement : 90°C
- Durée 15 minutes
- Aniline liquide 0,1 mole/litre
- Sulfate de sodium Na2SO4, 10 H2O : 0,5 M
- Acide sulfurique H2SO4 qsp pH=1
- Tripolyphosphate de sodium Na5P3O10 : 36 à 44 g/l
- Tétraborate de sodium Na2B4O7,10 H2O : 40 g/l
- Tensioactif ref. 631 : 10 ml/l
- Soude NaOH : pH = 8,5 à 9,5
- Température de fonctionnement : 55 à 65°C
- Durée : 10 à 15 minutes
- Acide nitrique 41° Bé HNO3 : 100 à 180 ml
- Acide fluorhydrique (48%) HF : 40 à 60 ml
- Additif F 68 : 1 g
- TA6V (métal) 1,5 g
- Eau distillée qsp : 11.
- Température de fonctionnement : 18 à 22°C
- Durée : 2 à 2,5
- qu'après un simple décapage fluonitrique, la polyaniline électropolymérisée n'adhère pas à la surface de l'alliage de titane,
- que le traitement de conversion chimique favorise l'adhérence de la polyaniline, mais la répartition de la couche est hétérogène,
- que le traitement d'hydrolyse est indispensable à la réalisation d'un film adhérent et homogène.
| Nm | R |
| 250 | 0,03 |
| 300 | 0,03 |
| 350 | 0,03 |
| 400 | 0,03 |
| 450 | 0,03 |
| 500 | 0,03 |
| 550 | 0,03 |
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| 750 | 0,03 |
| 800 | 0,03 |
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| 900 | 0,04 |
| 950 | 0,04 |
| 1000 | 0,04 |
| 1050 | 0,04 |
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| 1150 | 0,04 |
| 1200 | 0,04 |
| 1250 | 0,04 |
| 1300 | 0,04 |
| 1350 | 0,04 |
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| 1450 | 0,04 |
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| 1650 | 0,04 |
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| 2450 | 0,04 |
| 2500 | 0,05 |
| Nm | R |
| 250 | 0,01 |
| 300 | 0,01 |
| 350 | 0,01 |
| 400 | 0,01 |
| 450 | 0,01 |
| 500 | 0,01 |
| 550 | 0,01 |
| 600 | 0,01 |
| 650 | 0,01 |
| 700 | 0,01 |
| 750 | 0,02 |
| 800 | 0,02 |
| 850 | 0,02 |
| 900 | 0,02 |
| 950 | 0,02 |
| 1000 | 0,02 |
| 1050 | 0,02 |
| 1100 | 0,02 |
| 1150 | 0,02 |
| 1200 | 0,02 |
| 1250 | 0,02 |
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| 2300 | 0,03 |
| 2350 | 0,02 |
| 2400 | 0,02 |
| 2450 | 0,02 |
| 2500 | 0,02 |
Claims (9)
- Procédé de dépôt d'une couche de polyaniline sur un substrat de titane ou d'un alliage de titane, caractérisé en ce que la gamme opératoire du dépôt comprend successivement :un décapage fluonitrique ;un traitement de conversion chimique ;une hydrolyse ; etun dépôt de polyaniline par électropolymérisation.
- Procédé selon la revendication 1, caractérisé en ce que le décapage fluonitrique est effectué dans un bain dont les ingrédients et proportions sont définis par les quantités ci-après :pour une durée comprise entre 2 et 2,5 minutes et une température de fonctionnement comprise entre 18 et 22°C.Acide nitrique 41° Bé HNO3 : 100 à 180 mlAcide fluorhydrique (48%) HF : 40 à 60 mlAdditif F 68 : 1 gTA6V (métal) 1,5 gEau distillée gsp : 11
- Procédé de dépôt d'une couche de polyaniline sur un substrat de titane ou d'un alliage de titane, selon l'une des revendications 1 ou 2, caractérisé en ce que la gamme opératoire du dépôt comprend une étape préliminaire de nettoyage.
- Procédé selon la revendication 3, caractérisé en ce que l'étape préliminaire de nettoyage est un dégraissage alcalin.
- Procédé selon la revendication 4, caractérisé en ce que les proportions et ingrédients du dégraissage sont définis par les quantités ci-après :pour une durée comprise entre 10 et 15 minutes et une température de fonctionnement comprise entre 55 et 65°C.Tripolyphosphate de sodium Na5P3O10 : 36 à 44 g/lTétraborate de sodium Na2B4O7,10 H2O : 40 g/lTensioactif Ref. 631 : 10 ml/lSoude NaOH : pH = 8,5 à 9,5
- Procédé de dépôt d'une couche de polyaniline sur un substrat de titane ou d'un alliage de titane, selon l'une des revendications 1 à 5, caractérisé en ce que la gamme opératoire du dépôt comprend une étape terminale d'étuvage à une température comprise entre 40 et 160°C pendant une durée comprise entre 30 minutes et 2 heures.
- Procédé de dépôt d'une couche de polyaniline sur un substrat de titane ou d'un alliage de titane, selon l'une des revendications 1 à 6, caractérisé en ce que la gamme opératoire du dépôt comprend une étape de rugosification de la surface préalable au décapage fluonitrique.
- Procédé de dépôt selon la revendication 7, caractérisé en ce que la rugosité en fin d'étape de rugosification est comprise entre 10 et 30 µm.
- Procédé de dépôt selon la revendication 7 ou 8, caractérisé en ce que la rugosité est obtenue par sablage au moyen d'une poudre abrasive dans des conditions qui permettent d'obtenir une rugosité Ra de 10 à 30 µm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9901440A FR2789408B1 (fr) | 1999-02-08 | 1999-02-08 | Procede de preparation de surface et de depot de polyaniline pour absorber la lumiere |
| FR9901440 | 1999-02-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1029953A1 EP1029953A1 (fr) | 2000-08-23 |
| EP1029953B1 true EP1029953B1 (fr) | 2003-07-09 |
Family
ID=9541717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00400295A Expired - Lifetime EP1029953B1 (fr) | 1999-02-08 | 2000-02-03 | Procédé de preparation de surface et de dépôt de polyaniline pour absorber la lumière |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6258242B1 (fr) |
| EP (1) | EP1029953B1 (fr) |
| JP (1) | JP2000239894A (fr) |
| AT (1) | ATE244779T1 (fr) |
| DE (1) | DE60003734T2 (fr) |
| DK (1) | DK1029953T3 (fr) |
| ES (1) | ES2202009T3 (fr) |
| FR (1) | FR2789408B1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1447461B1 (fr) * | 2001-10-24 | 2007-12-12 | Fundacion Inasmet | Produit nettoyant et procede de nettoyage de surfaces en titane |
| US20050176592A1 (en) * | 2004-02-11 | 2005-08-11 | Tenaris Ag | Method of using intrinsically conductive polymers with inherent lubricating properties, and a composition having an intrinsically conductive polymer, for protecting metal surfaces from galling and corrosion |
| JP4628168B2 (ja) * | 2005-04-14 | 2011-02-09 | 株式会社ネオス | 金属表面の粗面化処理方法 |
| JP2009249705A (ja) * | 2008-04-09 | 2009-10-29 | Japan Carlit Co Ltd:The | 電解用電極及びその用途 |
| CN105543924B (zh) * | 2015-12-21 | 2017-09-26 | 广东工业大学 | 一种钛基导电水凝胶复合涂层材料的制备方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111762A (en) | 1975-01-31 | 1978-09-05 | Martin Marietta Corporation | Optically black coating and process for forming it |
| US4361630A (en) | 1979-04-20 | 1982-11-30 | The United States Of America As Represented By The Secretary Of The Commerce | Ultra-black coating due to surface morphology |
| US4233107A (en) | 1979-04-20 | 1980-11-11 | The United States Of America As Represented By The Secretary Of Commerce | Ultra-black coating due to surface morphology |
| US4589972A (en) | 1984-07-30 | 1986-05-20 | Martin Marietta Corporation | Optically black coating with improved infrared absorption and process of formation |
| US5079334A (en) * | 1988-05-13 | 1992-01-07 | The Ohio State University Research Foundation | Electromagnetic radiation absorbers and modulators comprising polyaniline |
-
1999
- 1999-02-08 FR FR9901440A patent/FR2789408B1/fr not_active Expired - Fee Related
-
2000
- 2000-02-03 DE DE60003734T patent/DE60003734T2/de not_active Expired - Lifetime
- 2000-02-03 DK DK00400295T patent/DK1029953T3/da active
- 2000-02-03 AT AT00400295T patent/ATE244779T1/de not_active IP Right Cessation
- 2000-02-03 ES ES00400295T patent/ES2202009T3/es not_active Expired - Lifetime
- 2000-02-03 EP EP00400295A patent/EP1029953B1/fr not_active Expired - Lifetime
- 2000-02-08 JP JP2000030501A patent/JP2000239894A/ja not_active Ceased
- 2000-02-08 US US09/500,015 patent/US6258242B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ES2202009T3 (es) | 2004-04-01 |
| US6258242B1 (en) | 2001-07-10 |
| DK1029953T3 (da) | 2003-10-27 |
| FR2789408A1 (fr) | 2000-08-11 |
| DE60003734D1 (de) | 2003-08-14 |
| FR2789408B1 (fr) | 2001-04-20 |
| DE60003734T2 (de) | 2004-04-15 |
| ATE244779T1 (de) | 2003-07-15 |
| JP2000239894A (ja) | 2000-09-05 |
| EP1029953A1 (fr) | 2000-08-23 |
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