CA2056159A1 - Non-chromated cobalt conversion coating - Google Patents
Non-chromated cobalt conversion coatingInfo
- Publication number
- CA2056159A1 CA2056159A1 CA002056159A CA2056159A CA2056159A1 CA 2056159 A1 CA2056159 A1 CA 2056159A1 CA 002056159 A CA002056159 A CA 002056159A CA 2056159 A CA2056159 A CA 2056159A CA 2056159 A1 CA2056159 A1 CA 2056159A1
- Authority
- CA
- Canada
- Prior art keywords
- cobalt
- solution
- conversion coating
- hexacoordinated complex
- iii hexacoordinated
- 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.)
- Granted
Links
- 229910017052 cobalt Inorganic materials 0.000 title abstract 8
- 239000010941 cobalt Substances 0.000 title abstract 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title abstract 8
- 238000007739 conversion coating Methods 0.000 title abstract 7
- 239000000758 substrate Substances 0.000 abstract 8
- 239000000243 solution Substances 0.000 abstract 7
- 229910052751 metal Inorganic materials 0.000 abstract 4
- 239000002184 metal Substances 0.000 abstract 4
- 238000000034 method Methods 0.000 abstract 3
- 239000007864 aqueous solution Substances 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical class [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 abstract 2
- 238000005260 corrosion Methods 0.000 abstract 2
- 230000007797 corrosion Effects 0.000 abstract 2
- UPWOEMHINGJHOB-UHFFFAOYSA-N oxo(oxocobaltiooxy)cobalt Chemical compound O=[Co]O[Co]=O UPWOEMHINGJHOB-UHFFFAOYSA-N 0.000 abstract 2
- 239000003973 paint Substances 0.000 abstract 2
- 229910000838 Al alloy Inorganic materials 0.000 abstract 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 abstract 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 150000002826 nitrites Chemical class 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
Classifications
-
- 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
- C23C22/05—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 using aqueous solutions
- C23C22/68—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 using aqueous solutions using aqueous solutions with pH between 6 and 8
-
- 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
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Chemically Coating (AREA)
Abstract
(A.) A process for forming a cobalt conversion coating on a metal substrate, thereby imparting corrosion resistance and paint adhesion properties. The invention was developed as a replacement for the prior art chromic acid process. The process includes the steps of: (a) providing a cobalt conversion solution comprising an aqueous solution having a pH
of about 7.0 to 7.2 and containing a soluble cobalt-III
hexacoordinated complex, the concentration of the cobalt-III
hexacoordinated complex being from about 0.1 mole per gallon of solution to the saturation limit of the cobalt-III
hexacoordinated complex; and (b) contacting the substrate with the solution for a sufficient amount of time, whereby the cobalt conversion coating is formed. The substrate may be aluminum or aluminum alloy, as well as magnesium and its alloys, Cd plated substrates, and Zn plated substrates. The cobalt-III hexacoordinated complex may be present in the form of Me3[Co(NO2)6] wherein Me is one or more of Na, K, and Li.
(B.) A chemical conversion coating solution for producing the cobalt conversion coating on a metal substrate, the solution being an aqueous solution having a pH of about 7:0 to 7.2 and containing a soluble cobalt-III hexacoordinated complex, the concentration of the cobalt-III hexacoordinated complex being from about 0.1 mole per gallon of solution to the saturation limit of the cobalt-III hexacoordinated complex. The cobalt conversion solution may be prepared by a bath makeup sequence including the steps of: (a) dissolving a metal nitrite salt;
(b) dissolving an accelerator such as NaI; (c) dissolving a cobalt-II salt; and (d) then adding an oxidizer such as H2O2.
(C.) A coated article exhibiting corrosion resistance and paint adhesion properties, the article including: (a) a metal substrate; and (b) a cobalt conversion coating formed on the substrate, the cobalt conversion coating including aluminum oxide Al2O3 as the largest volume percent, and cobalt oxides CoO, Co3O4, and Co2O3.
of about 7.0 to 7.2 and containing a soluble cobalt-III
hexacoordinated complex, the concentration of the cobalt-III
hexacoordinated complex being from about 0.1 mole per gallon of solution to the saturation limit of the cobalt-III
hexacoordinated complex; and (b) contacting the substrate with the solution for a sufficient amount of time, whereby the cobalt conversion coating is formed. The substrate may be aluminum or aluminum alloy, as well as magnesium and its alloys, Cd plated substrates, and Zn plated substrates. The cobalt-III hexacoordinated complex may be present in the form of Me3[Co(NO2)6] wherein Me is one or more of Na, K, and Li.
(B.) A chemical conversion coating solution for producing the cobalt conversion coating on a metal substrate, the solution being an aqueous solution having a pH of about 7:0 to 7.2 and containing a soluble cobalt-III hexacoordinated complex, the concentration of the cobalt-III hexacoordinated complex being from about 0.1 mole per gallon of solution to the saturation limit of the cobalt-III hexacoordinated complex. The cobalt conversion solution may be prepared by a bath makeup sequence including the steps of: (a) dissolving a metal nitrite salt;
(b) dissolving an accelerator such as NaI; (c) dissolving a cobalt-II salt; and (d) then adding an oxidizer such as H2O2.
(C.) A coated article exhibiting corrosion resistance and paint adhesion properties, the article including: (a) a metal substrate; and (b) a cobalt conversion coating formed on the substrate, the cobalt conversion coating including aluminum oxide Al2O3 as the largest volume percent, and cobalt oxides CoO, Co3O4, and Co2O3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US621,132 | 1984-06-15 | ||
| US62113290A | 1990-11-30 | 1990-11-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2056159A1 true CA2056159A1 (en) | 1992-05-31 |
| CA2056159C CA2056159C (en) | 2001-07-03 |
Family
ID=24488866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002056159A Expired - Lifetime CA2056159C (en) | 1990-11-30 | 1991-11-25 | Non-chromated cobalt conversion coating |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0488430B1 (en) |
| JP (1) | JP3194607B2 (en) |
| AT (1) | ATE154401T1 (en) |
| AU (1) | AU650494B2 (en) |
| BR (1) | BR9105184A (en) |
| CA (1) | CA2056159C (en) |
| DE (1) | DE69126507T2 (en) |
| DK (1) | DK0488430T3 (en) |
| ES (1) | ES2104655T3 (en) |
| GR (1) | GR3024046T3 (en) |
| MX (1) | MX9102254A (en) |
| NZ (1) | NZ240779A (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2087473C (en) * | 1990-05-17 | 2001-10-16 | Matthias P. Schriever | Non-chromated oxide coating for aluminum substrates |
| US5551994A (en) * | 1990-05-17 | 1996-09-03 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
| US5298092A (en) * | 1990-05-17 | 1994-03-29 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
| US5411606A (en) * | 1990-05-17 | 1995-05-02 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
| US5468307A (en) * | 1990-05-17 | 1995-11-21 | Schriever; Matthias P. | Non-chromated oxide coating for aluminum substrates |
| US5472524A (en) * | 1990-05-17 | 1995-12-05 | The Boeing Company | Non-chromated cobalt conversion coating method and coated articles |
| DK0523288T3 (en) * | 1991-07-19 | 1999-08-02 | Boeing Co | Non-chromated oxide coatings for aluminum substrates |
| CN1138873C (en) * | 1992-06-25 | 2004-02-18 | 波音公司 | Non-chromated oxide coating for aluminum substrates |
| RU2130977C1 (en) * | 1993-01-19 | 1999-05-27 | Дзе Боинг Компани | Method of forming cobalt oxide conversion coating and aqueous solution for preparing cobalt oxide conversion coating |
| DE69429627T2 (en) | 1993-09-13 | 2002-09-19 | Commonwealth Scientific And Industrial Research Organisation, Campbell | METAL TREATMENT WITH ACID, RARE EARTH CLEANING SOLUTIONS CONTAINING ION |
| AUPM621194A0 (en) * | 1994-06-10 | 1994-07-07 | Commonwealth Scientific And Industrial Research Organisation | Conversion coating and process for its formation |
| CZ143197A3 (en) | 1994-11-11 | 1997-10-15 | Commw Scient Ind Res Org | Solution for making a conversion coating on a metallic surface and method of applying thereof to the metallic surface |
| GB9617416D0 (en) * | 1996-08-20 | 1996-10-02 | Minnesota Mining & Mfg | Thermal bleaching of infrared dyes |
| FR2752851B1 (en) * | 1996-09-02 | 1998-11-13 | Cfpi Ind | BATH AND METHOD FOR PHOSPHATION OF METAL SUBSTRATES, CONCENTRATE FOR THE PREPARATION OF THIS BATH AND METAL SUBSTRATES TREATED WITH THE BATH AND METHOD |
| US5873953A (en) * | 1996-12-26 | 1999-02-23 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
| ZA983867B (en) * | 1997-05-16 | 1998-11-13 | Henkel Corp | Lithium and vanadium containing sealing composition and process therewith |
| US6315823B1 (en) | 1998-05-15 | 2001-11-13 | Henkel Corporation | Lithium and vanadium containing sealing composition and process therewith |
| US6432225B1 (en) * | 1999-11-02 | 2002-08-13 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
| AUPQ633200A0 (en) | 2000-03-20 | 2000-04-15 | Commonwealth Scientific And Industrial Research Organisation | Process and solution for providing a conversion coating on a metallic surface I |
| AUPQ633300A0 (en) | 2000-03-20 | 2000-04-15 | Commonwealth Scientific And Industrial Research Organisation | Process and solution for providing a conversion coating on a metallic surface ii |
| US7235142B2 (en) | 2002-01-04 | 2007-06-26 | University Of Dayton | Non-toxic corrosion-protection rinses and seals based on cobalt |
| US7294211B2 (en) * | 2002-01-04 | 2007-11-13 | University Of Dayton | Non-toxic corrosion-protection conversion coats based on cobalt |
| AU2002361689A1 (en) | 2002-01-04 | 2003-07-30 | University Of Dayton | Non-toxic corrosion protection pigments based on cobalt |
| US6818313B2 (en) | 2002-07-24 | 2004-11-16 | University Of Dayton | Corrosion-inhibiting coating |
| US20040011252A1 (en) | 2003-01-13 | 2004-01-22 | Sturgill Jeffrey A. | Non-toxic corrosion-protection pigments based on manganese |
| JP4934984B2 (en) * | 2005-03-31 | 2012-05-23 | 大日本印刷株式会社 | Method for producing metal oxide film |
| RU2416680C1 (en) * | 2009-11-05 | 2011-04-20 | Федеральное государственное образовательное учреждение высшего профессионального образования "Астраханский государственный технический университет" | Electrolyte of aluminium and its alloys anodic treatment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905838A (en) * | 1974-04-10 | 1975-09-16 | Hikaru Ito | Bath for treating aluminum and aluminum alloys to form oxide film nonelectrolytically thereon and method for the treatment |
| US4381203A (en) * | 1981-11-27 | 1983-04-26 | Amchem Products, Inc. | Coating solutions for zinc surfaces |
| JPH0331484A (en) * | 1989-06-27 | 1991-02-12 | Nippon Parkerizing Co Ltd | Blackening treatment method for zinc or zinc-based plating materials |
| JPH03226584A (en) * | 1990-01-30 | 1991-10-07 | Nippon Parkerizing Co Ltd | Surface treatment liquid and surface treatment method for galvanized steel sheets |
| US5298092A (en) * | 1990-05-17 | 1994-03-29 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
-
1991
- 1991-08-27 DE DE69126507T patent/DE69126507T2/en not_active Expired - Lifetime
- 1991-08-27 AT AT91202181T patent/ATE154401T1/en not_active IP Right Cessation
- 1991-08-27 EP EP91202181A patent/EP0488430B1/en not_active Expired - Lifetime
- 1991-08-27 ES ES91202181T patent/ES2104655T3/en not_active Expired - Lifetime
- 1991-08-27 DK DK91202181.3T patent/DK0488430T3/en active
- 1991-11-25 CA CA002056159A patent/CA2056159C/en not_active Expired - Lifetime
- 1991-11-27 AU AU88225/91A patent/AU650494B2/en not_active Ceased
- 1991-11-28 MX MX9102254A patent/MX9102254A/en not_active IP Right Cessation
- 1991-11-28 NZ NZ240779A patent/NZ240779A/en not_active IP Right Cessation
- 1991-11-28 BR BR919105184A patent/BR9105184A/en not_active IP Right Cessation
- 1991-11-29 JP JP31608191A patent/JP3194607B2/en not_active Expired - Lifetime
-
1997
- 1997-07-09 GR GR970401701T patent/GR3024046T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE69126507D1 (en) | 1997-07-17 |
| HK1006861A1 (en) | 1999-03-19 |
| AU650494B2 (en) | 1994-06-23 |
| ATE154401T1 (en) | 1997-06-15 |
| EP0488430A3 (en) | 1992-12-16 |
| NZ240779A (en) | 1994-11-25 |
| GR3024046T3 (en) | 1997-10-31 |
| EP0488430B1 (en) | 1997-06-11 |
| MX9102254A (en) | 1992-06-01 |
| AU8822591A (en) | 1992-06-04 |
| BR9105184A (en) | 1992-07-21 |
| ES2104655T3 (en) | 1997-10-16 |
| CA2056159C (en) | 2001-07-03 |
| JP3194607B2 (en) | 2001-07-30 |
| JPH059745A (en) | 1993-01-19 |
| DE69126507T2 (en) | 1997-09-25 |
| DK0488430T3 (en) | 1998-01-05 |
| EP0488430A2 (en) | 1992-06-03 |
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| CA2056159A1 (en) | Non-chromated cobalt conversion coating | |
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| US5472524A (en) | Non-chromated cobalt conversion coating method and coated articles | |
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| WO2001032954A3 (en) | Non-chromated oxide coating for aluminum substrates | |
| Schriever | Non-chromated cobalt conversion coating | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121211 |