DK0488430T3 - Chromate-free cobalt conversion coating - Google Patents
Chromate-free cobalt conversion coatingInfo
- Publication number
- DK0488430T3 DK0488430T3 DK91202181.3T DK91202181T DK0488430T3 DK 0488430 T3 DK0488430 T3 DK 0488430T3 DK 91202181 T DK91202181 T DK 91202181T DK 0488430 T3 DK0488430 T3 DK 0488430T3
- Authority
- DK
- Denmark
- Prior art keywords
- cobalt
- solution
- conversion coating
- hexacoordinated complex
- iii hexacoordinated
- Prior art date
Links
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. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US62113290A | 1990-11-30 | 1990-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
DK0488430T3 true DK0488430T3 (en) | 1998-01-05 |
Family
ID=24488866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK91202181.3T DK0488430T3 (en) | 1990-11-30 | 1991-08-27 | Chromate-free cobalt conversion coating |
Country Status (13)
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) |
HK (1) | HK1006861A1 (en) |
MX (1) | MX9102254A (en) |
NZ (1) | NZ240779A (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5472524A (en) * | 1990-05-17 | 1995-12-05 | The Boeing Company | Non-chromated cobalt conversion coating method and coated articles |
US5551994A (en) * | 1990-05-17 | 1996-09-03 | 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 |
CA2087473C (en) * | 1990-05-17 | 2001-10-16 | Matthias P. Schriever | 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 |
EP0523288B1 (en) * | 1991-07-19 | 1998-11-18 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
CN1138873C (en) * | 1992-06-25 | 2004-02-18 | 波音公司 | Non-chromated oxide coating for aluminum substrates |
EP0719350B1 (en) | 1993-09-13 | 2002-01-09 | Commonwealth Scientific And Industrial Research Organisation | Metal treatment with acidic, rare earth ion containing cleaning solution |
AUPM621194A0 (en) * | 1994-06-10 | 1994-07-07 | Commonwealth Scientific And Industrial Research Organisation | Conversion coating and process for its formation |
ATE213285T1 (en) | 1994-11-11 | 2002-02-15 | Commw Scient Ind Res Org | METHOD AND SOLUTION FOR PROVIDING A CONVERSION COATING ON A METAL 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 |
EP1472319A1 (en) | 2002-01-04 | 2004-11-03 | University Of Dayton | Non-toxic corrosion protection pigments based on cobalt |
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 |
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 |
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 of zinc or zinc-based plating material |
JPH03226584A (en) * | 1990-01-30 | 1991-10-07 | Nippon Parkerizing Co Ltd | Solution for surface-treating galvanized steel sheet and method therefor |
US5298092A (en) * | 1990-05-17 | 1994-03-29 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
-
1991
- 1991-08-27 ES ES91202181T patent/ES2104655T3/en not_active Expired - Lifetime
- 1991-08-27 EP EP91202181A patent/EP0488430B1/en not_active Expired - Lifetime
- 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 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 BR BR919105184A patent/BR9105184A/en not_active IP Right Cessation
- 1991-11-28 NZ NZ240779A patent/NZ240779A/en not_active IP Right Cessation
- 1991-11-28 MX MX9102254A patent/MX9102254A/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
-
1998
- 1998-06-22 HK HK98105956A patent/HK1006861A1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NZ240779A (en) | 1994-11-25 |
BR9105184A (en) | 1992-07-21 |
EP0488430A2 (en) | 1992-06-03 |
CA2056159C (en) | 2001-07-03 |
ATE154401T1 (en) | 1997-06-15 |
GR3024046T3 (en) | 1997-10-31 |
DE69126507D1 (en) | 1997-07-17 |
JP3194607B2 (en) | 2001-07-30 |
JPH059745A (en) | 1993-01-19 |
DE69126507T2 (en) | 1997-09-25 |
ES2104655T3 (en) | 1997-10-16 |
MX9102254A (en) | 1992-06-01 |
AU650494B2 (en) | 1994-06-23 |
AU8822591A (en) | 1992-06-04 |
EP0488430A3 (en) | 1992-12-16 |
EP0488430B1 (en) | 1997-06-11 |
HK1006861A1 (en) | 1999-03-19 |
CA2056159A1 (en) | 1992-05-31 |
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