US20040256030A1 - Corrosion resistant, chromate-free conversion coating for magnesium alloys - Google Patents
Corrosion resistant, chromate-free conversion coating for magnesium alloys Download PDFInfo
- Publication number
- US20040256030A1 US20040256030A1 US10/601,247 US60124703A US2004256030A1 US 20040256030 A1 US20040256030 A1 US 20040256030A1 US 60124703 A US60124703 A US 60124703A US 2004256030 A1 US2004256030 A1 US 2004256030A1
- Authority
- US
- United States
- Prior art keywords
- magnesium
- solution
- chromate
- corrosion
- phosphonic acids
- 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.)
- Abandoned
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
- C23C22/06—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 acidic solutions with pH less than 6
-
- 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
- C23C22/06—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 acidic solutions with pH less than 6
- C23C22/34—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 acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—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 acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
-
- 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
- C23C22/06—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 acidic solutions with pH less than 6
- C23C22/40—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 acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
- C23C22/44—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 acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also fluorides or complex fluorides
-
- 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
- C23C22/73—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
- C23C22/77—Controlling or regulating of the coating process
Definitions
- the present invention relates to a corrosion resistant, chromate-free, phosphate-fluoride conversion coating, with or without vanadate, for a product formed from magnesium or a magnesium alloy and to a coating solution for use in a coating process.
- Magnesium alloys are light and strong, but very vulnerable to corrosion due to the reactive nature of magnesium. Magnesium alloys are protected from corrosion in all practical applications.
- a commonly used, low cost, corrosion resistant treatment for magnesium alloys is a dichromate based conversion coating. While dichromate based conversion coatings provide good corrosion protection, they are based on a chemical compound (hexavalent chromium) that has many occupational exposure risks.
- a non-chromate, corrosion resistant magnesium conversion coating is required to meet industry demands.
- a chromate-free, phosphate-fluoride conversion coating, with or without vanadate, formed on a magnesium or a magnesium alloy substrate includes an active corrosion inhibitor selected from the group consisting of organo-phosphonic acids.
- the phosphonic acid group reacts with the magnesium metal of the substrate to form an insoluble salt.
- the preferred organo-phosphonic acids used as corrosion inhibitors in accordance with the present invention are selected from the group consisting of straight chain or branched amino alkyl phosphonic acids, straight chain or branched alkyl phoshonic acids, and triphosphonic acids, particularly, nitrilotris (methylene) triphosphonic acid (NTMP).
- the corrosion inhibitor includes amino alkyl phosphonic acids, the amine group can interact with vanadate ions in the coating solution to increase the vanadate incorporation into the conversion coating.
- a solution for forming a chromate-free, corrosion resistant coating on a magnesium or magnesium alloy substrate comprises a solution having phosphate and fluoride ions and, an active corrosion inhibitor selected from the group consisting of organo-phosphonic acids.
- the solution of the present invention may optionally include vanadate anions.
- the active corrosion inhibitor is selected from the group consisting of straight chained or branched amino-alkyl phosphonic acids, straight chained or branched alkyl phosphonic acids, triphosphonic acids, and mixtures thereof.
- a particular useful triphosphonic acid comprises nitrilotris (methylene) triphosphonic acid (NTMP).
- the chromate-free solution include phosphate and fluoride ions.
- Phosphate and fluoride ions are present in an amount of between about 1 g/L to 50 g/L and 1 g/L to 10 g/L, respectively, preferably between 10 g/L to 25 g/L and 3 g/L to 5 g/L, respectively. It is important in the present invention to control the pH of the solution and this is achieved by the amount of phosphate ions and fluoride ions in the solution.
- the pH of the solution is preferably in the range of 5 to 7.
- the particular phosphate and fluoride compounds employed in forming the solution having the appropriate pH is disclosed in detail in co-pending application Ser. No. 10/073,688, filed Feb. 11, 2002, and this co-pending application and the disclosure therein is incorporated herein by reference.
- the corrosion inhibitor is present in the solution in an amount of between about 1 ppm to 1 wt %, preferably 10 ppm to 0.5 wt %.
- the corrosion inhibitor is in the form of an organo-phosphonic acid.
- Preferred organo-phosphonic acids include straight chained and branched amino-alkyl phosphonic acids, straight chained or branched alkyl phosphonic acids and triphosphonic acids.
- a particularly useful triphosphonic acid is nitrilotris (methylene) triphosphonic acid (NTMP).
- the solution may optionally include vanadate anions.
- Sodium vanadate is a suitable source of vanadate ions for the solution of the present invention.
- the vanadate ions are present in an amount of between about 1.0 g/l to 5.0 g/l. It has been found that the vanadate anions interact with the amine group of the amino alkyl phosphonic acids increase incorporation of the vanadate into the conversion coating thereby improving the coating performance.
- the phosphonic acid groups of the corrosion inhibitor react with the magnesium metal substrate to form insoluble salts which improve corrosion performance.
- the preferred chromate-free solution comprises phosphate ions in an amount of between 10 to 25 g/L, fluoride ions in an amount of between 3 g/L to 5 g/L, vanadate anions in an amount of between 1 g/L to 5 g/L, and the corrosion inhibitor in an amount of between 10 ppm to 0.5 wt %.
- a magnesium or magnesium alloy substrate having a conversion coating in accordance with the present invention comprises mostly magnesium phosphate and magnesium fluoride. It is believed that the amino alkyl phosphonic acid will form insoluble magnesium salt as part of the conversion coating. This component will increase the interaction of vanadium with conversion coating, therefore increase vanadium content in the coating, should vanadium is used as corrosion inhibitor as well.
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)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/601,247 US20040256030A1 (en) | 2003-06-20 | 2003-06-20 | Corrosion resistant, chromate-free conversion coating for magnesium alloys |
KR1020040043886A KR100611288B1 (ko) | 2003-06-20 | 2004-06-15 | 마그네슘 합금용 내식성 크로메이트-무함유 화성 코팅물의 제조 방법 |
SG200403770A SG117497A1 (en) | 2003-06-20 | 2004-06-15 | Corrosion resistant, chromate-free conversion coating for magnesium alloys |
EP04253681A EP1489199A1 (en) | 2003-06-20 | 2004-06-18 | Corrosion resistant coating composition and process and coated magnesium |
CNB2004100714667A CN100339507C (zh) | 2003-06-20 | 2004-06-18 | 用于镁合金的抗腐蚀、无铬酸盐转化涂层 |
JP2004180425A JP2005008985A (ja) | 2003-06-20 | 2004-06-18 | マグネシウムまたはマグネシウム合金用の耐食性無クロム酸塩転化被覆の形成用溶液 |
PL04368625A PL368625A1 (en) | 2003-06-20 | 2004-06-18 | Solution for producing coat, method for producing coat and coated product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/601,247 US20040256030A1 (en) | 2003-06-20 | 2003-06-20 | Corrosion resistant, chromate-free conversion coating for magnesium alloys |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040256030A1 true US20040256030A1 (en) | 2004-12-23 |
Family
ID=33418585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/601,247 Abandoned US20040256030A1 (en) | 2003-06-20 | 2003-06-20 | Corrosion resistant, chromate-free conversion coating for magnesium alloys |
Country Status (7)
Country | Link |
---|---|
US (1) | US20040256030A1 (ko) |
EP (1) | EP1489199A1 (ko) |
JP (1) | JP2005008985A (ko) |
KR (1) | KR100611288B1 (ko) |
CN (1) | CN100339507C (ko) |
PL (1) | PL368625A1 (ko) |
SG (1) | SG117497A1 (ko) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060237097A1 (en) * | 2005-04-20 | 2006-10-26 | Rohm And Haas Electronic Materials Llc | Immersion method |
US20090004486A1 (en) * | 2007-06-27 | 2009-01-01 | Sarah Arsenault | Corrosion inhibiting additive |
WO2009072905A2 (en) * | 2007-12-04 | 2009-06-11 | Katja Products Limited | Surface coating |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008174807A (ja) * | 2007-01-19 | 2008-07-31 | Nippon Hyomen Kagaku Kk | クロムを含まない金属表面処理液 |
TWI394863B (zh) * | 2007-12-27 | 2013-05-01 | Kansai Paint Co Ltd | 金屬表面處理用組成物及從該金屬表面處理用組成物獲得之具有金屬表面處理層的表面處理金屬材 |
JP4908456B2 (ja) | 2008-06-02 | 2012-04-04 | パンパシフィック・カッパー株式会社 | 銅の製錬方法 |
US20130014670A1 (en) * | 2010-04-01 | 2013-01-17 | Commissariat a I'Energie Atomique et Aux Energies Altematives | Use of anticorrosion agents for conditioning magnesium metal, conditioning material thus obtained and preparation process |
JP5595874B2 (ja) * | 2010-11-04 | 2014-09-24 | 三井金属鉱業株式会社 | マグネシウム合金の表面処理方法 |
JP6089053B2 (ja) * | 2015-03-16 | 2017-03-01 | 有限会社エスク | 防食能を有する生分解性金属表面修飾ステント |
KR102142783B1 (ko) * | 2018-11-30 | 2020-08-07 | 주식회사 포스코 | 마그네슘 또는 마그네슘 합금 표면처리용 조성물 및 이를 이용하여 표면처리된 마그네슘 또는 마그네슘 합금 |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3459600A (en) * | 1966-11-07 | 1969-08-05 | Todco Chem Co Inc | Novel zinc coating composition and method |
US4017334A (en) * | 1973-10-04 | 1977-04-12 | Oxy Metal Industries Corporation | Process for treating aluminum cans |
US4264378A (en) * | 1979-02-14 | 1981-04-28 | Oxy Metal Industries Corporation | Chromium-free surface treatment |
US4308079A (en) * | 1980-06-16 | 1981-12-29 | Martin Marietta Corporation | Durability of adhesively bonded aluminum structures and method for inhibiting the conversion of aluminum oxide to aluminum hydroxide |
US5143562A (en) * | 1991-11-01 | 1992-09-01 | Henkel Corporation | Broadly applicable phosphate conversion coating composition and process |
US5380374A (en) * | 1993-10-15 | 1995-01-10 | Circle-Prosco, Inc. | Conversion coatings for metal surfaces |
US5449415A (en) * | 1993-07-30 | 1995-09-12 | Henkel Corporation | Composition and process for treating metals |
US5683522A (en) * | 1995-03-30 | 1997-11-04 | Sundstrand Corporation | Process for applying a coating to a magnesium alloy product |
US20030150525A1 (en) * | 2002-02-11 | 2003-08-14 | Briles Owen M. | Corrosion resistant, chromate-free conversion coating for magnesium alloys |
US20030188807A1 (en) * | 2000-09-22 | 2003-10-09 | Meagher Kevin K. | Composition and process for treating metals |
US6692583B2 (en) * | 2002-02-14 | 2004-02-17 | Jon Bengston | Magnesium conversion coating composition and method of using same |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US2312855A (en) * | 1940-09-07 | 1943-03-02 | Parker Rust Proof Co | Method of coating aluminum |
US4427459A (en) * | 1982-01-25 | 1984-01-24 | Pennwalt Corporation | Phosphate conversion coatings for metals with reduced coating weights and crystal sizes |
DE19754108A1 (de) * | 1997-12-05 | 1999-06-10 | Henkel Kgaa | Chromfreies Korrosionsschutzmittel und Korrosionsschutzverfahren |
DE19923084A1 (de) * | 1999-05-20 | 2000-11-23 | Henkel Kgaa | Chromfreies Korrosionsschutzmittel und Korrosionsschutzverfahren |
JP3860697B2 (ja) * | 1999-12-27 | 2006-12-20 | 日本パーカライジング株式会社 | 金属表面処理剤、金属材料の表面処理方法及び表面処理金属材料 |
CA2408675A1 (en) * | 2000-05-11 | 2001-11-15 | Henkel Corporation | Metal surface treatment agent |
CN1386901A (zh) * | 2001-05-01 | 2002-12-25 | 日本巴卡莱近估股份有限公司 | 金属表面处理剂、金属表面处理方法及表面处理金属材料 |
-
2003
- 2003-06-20 US US10/601,247 patent/US20040256030A1/en not_active Abandoned
-
2004
- 2004-06-15 SG SG200403770A patent/SG117497A1/en unknown
- 2004-06-15 KR KR1020040043886A patent/KR100611288B1/ko not_active IP Right Cessation
- 2004-06-18 JP JP2004180425A patent/JP2005008985A/ja active Pending
- 2004-06-18 EP EP04253681A patent/EP1489199A1/en not_active Withdrawn
- 2004-06-18 CN CNB2004100714667A patent/CN100339507C/zh not_active Expired - Fee Related
- 2004-06-18 PL PL04368625A patent/PL368625A1/xx not_active Application Discontinuation
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3459600A (en) * | 1966-11-07 | 1969-08-05 | Todco Chem Co Inc | Novel zinc coating composition and method |
US4017334A (en) * | 1973-10-04 | 1977-04-12 | Oxy Metal Industries Corporation | Process for treating aluminum cans |
US4264378A (en) * | 1979-02-14 | 1981-04-28 | Oxy Metal Industries Corporation | Chromium-free surface treatment |
US4308079A (en) * | 1980-06-16 | 1981-12-29 | Martin Marietta Corporation | Durability of adhesively bonded aluminum structures and method for inhibiting the conversion of aluminum oxide to aluminum hydroxide |
US5143562A (en) * | 1991-11-01 | 1992-09-01 | Henkel Corporation | Broadly applicable phosphate conversion coating composition and process |
US5449415A (en) * | 1993-07-30 | 1995-09-12 | Henkel Corporation | Composition and process for treating metals |
US5380374A (en) * | 1993-10-15 | 1995-01-10 | Circle-Prosco, Inc. | Conversion coatings for metal surfaces |
US5683522A (en) * | 1995-03-30 | 1997-11-04 | Sundstrand Corporation | Process for applying a coating to a magnesium alloy product |
US20030188807A1 (en) * | 2000-09-22 | 2003-10-09 | Meagher Kevin K. | Composition and process for treating metals |
US20030150525A1 (en) * | 2002-02-11 | 2003-08-14 | Briles Owen M. | Corrosion resistant, chromate-free conversion coating for magnesium alloys |
US6692583B2 (en) * | 2002-02-14 | 2004-02-17 | Jon Bengston | Magnesium conversion coating composition and method of using same |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060237097A1 (en) * | 2005-04-20 | 2006-10-26 | Rohm And Haas Electronic Materials Llc | Immersion method |
US20100101962A1 (en) * | 2005-04-20 | 2010-04-29 | Rohm And Haas Electronic Materials Llc | Immersion method |
US20090004486A1 (en) * | 2007-06-27 | 2009-01-01 | Sarah Arsenault | Corrosion inhibiting additive |
US10774428B2 (en) | 2007-06-27 | 2020-09-15 | Raytheon Technologies Corporation | Method for corrosion inhibiting additive |
WO2009072905A2 (en) * | 2007-12-04 | 2009-06-11 | Katja Products Limited | Surface coating |
WO2009072905A3 (en) * | 2007-12-04 | 2009-07-23 | Katja Products Ltd | Surface coating |
Also Published As
Publication number | Publication date |
---|---|
JP2005008985A (ja) | 2005-01-13 |
SG117497A1 (en) | 2005-12-29 |
KR20040110097A (ko) | 2004-12-29 |
EP1489199A1 (en) | 2004-12-22 |
CN1572904A (zh) | 2005-02-02 |
KR100611288B1 (ko) | 2006-08-10 |
PL368625A1 (en) | 2004-12-27 |
CN100339507C (zh) | 2007-09-26 |
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Legal Events
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AS | Assignment |
Owner name: UNITED TECHNOLOGIES CORPORATION, CONNECTICUT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TANG, XIA;JAWOROWSKI, MARK;HAMMERSCHMIDT, KENNETH;REEL/FRAME:014226/0624;SIGNING DATES FROM 20030618 TO 20030619 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |