EP1439243B1 - Method of non-chromate pretreatment for metal alloys - Google Patents

Method of non-chromate pretreatment for metal alloys Download PDF

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Publication number
EP1439243B1
EP1439243B1 EP03001023A EP03001023A EP1439243B1 EP 1439243 B1 EP1439243 B1 EP 1439243B1 EP 03001023 A EP03001023 A EP 03001023A EP 03001023 A EP03001023 A EP 03001023A EP 1439243 B1 EP1439243 B1 EP 1439243B1
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EP
European Patent Office
Prior art keywords
acid
organic
alloy
organic acid
alloy surface
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
Application number
EP03001023A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1439243A1 (en
Inventor
Goang-Cheng Chang
Chi-Hui Lin
Chuang-I Chen
Min-Te Su
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanmat Tech Co Ltd
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Nanmat Tech Co Ltd
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Filing date
Publication date
Application filed by Nanmat Tech Co Ltd filed Critical Nanmat Tech Co Ltd
Priority to AT03001023T priority Critical patent/ATE389738T1/de
Priority to DE60319795T priority patent/DE60319795T2/de
Priority to EP03001023A priority patent/EP1439243B1/en
Priority to ES03001023T priority patent/ES2302873T3/es
Publication of EP1439243A1 publication Critical patent/EP1439243A1/en
Application granted granted Critical
Publication of EP1439243B1 publication Critical patent/EP1439243B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
    • C23C18/122—Inorganic polymers, e.g. silanes, polysilazanes, polysiloxanes
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/1229—Composition of the substrate
    • C23C18/1241—Metallic substrates
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/125—Process of deposition of the inorganic material
    • C23C18/1295—Process of deposition of the inorganic material with after-treatment of the deposited inorganic material
    • 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
    • C23C22/48—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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/57—Treatment of magnesium or alloys based thereon
    • 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
    • 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

Definitions

  • This invention relates to a method of non-chromate pretreatment for magnesium alloys, particularly to one in which film treatment is carried out after an alloy surface is degreased and cleaned.
  • the process of film treatment is to have the alloy surface coated with coating liquid which will bond with the alloy surface to form a film thereon, impossible to produce industrial waste water with heavy metallic ion, reducing environmental pollution to the minimum, simple in handling, and able to elevate producing efficiency and lower producing cost.
  • a conventional process for treating an alloy surface acid conversion or anodizing in acid liquid has to be carried out in order to produce a rough and porous oxidized layer on the alloy surface for facilitating gluing or lacquering.
  • the process of treating the alloy surface is to have an alloy surface degreased and cleaned first and then water washed through two stages to ensure its cleanness and then pickled to remove dissociative agent, and then water rinsing again so as to remove pickling liquid from the alloy surface for carrying out sequent film forming. Subsequently, the alloy has its surface treated with dip coating, spray coating or roll coating with film forming agent, which will react to the alloy surface for preventing corrosion and sequent lacquering with excellent physical adhesion.
  • EP 0 358 338 A2 discloses a method of pretreatment for metals like titanium, copper, zinc, aluminium and their alloys. This method includes the steps of degreasing and water rinsing. Afterwards the surface is treated by a pretreatment solution which is an aqueous composition comprising an inorganic hydrous oxide sol in order to form a protective coating.
  • This aqueous composition may contain an adhesion promoter, for instance one or more silane coupling agents.
  • JP 57023057 A discloses a method of treating the surface of magnesium or magnesium alloys by a coating composition containing a silane coupling agent like vinyl trichlorosilane.
  • JP 02034790 A discloses a method for treating steel sheets by applying a solution containing one or more of (1) an alkoxide of Al, Zr, Ti, (2) monomethyl alkoxide of the metals, and (3) one or more of acetylacetonate salts, and an amount of silane coupling agent.
  • One objective of the invention is to offer a method of non-chromate pretreatment for metal alloys, impossible to produce heavy metallic waste water to pollute environment and able to reduce producing cost.
  • Another objective of the invention is to offer a method of non-chromate pretreatment for metal alloys, able to let a treated alloy surface have high adhesion, high conductivity, and anti-rust, anti-corrosion, anti-finger, anti-dust and water repellence functions.
  • the main feature of the invention is a treating process including degreasing, water rinsing acid pretreatment and film treatment as specified in claim 1.
  • the film treatment is to have an alloy surface coated with coating liquid to carry out continuously a coating reaction on the alloy surface until the coating liquid bonds with the alloy surface and forms a film thereon.
  • the film coating liquid applies aluminum sec-butoxide or a combination freely composed of more than one of the following chemicals: vinyltrimethoxysilane, tetraethoxysilane, methyltrimethoxysilane, ⁇ -methacryloxypropyl-trimethoxysilane, ⁇ -chloropropyl-trimethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, decyltrimethoxysilane, isobutyltrimethoxysilane, 3-aminopropyltrimethoxysilane, tert-butyldimethylchlorosilane, vinyltrichlorosilane, ⁇ -mercaptopropyl-trimethoxysilane, diphenyldichlorosilane, hexamethyldisilane, vinyltrisilane, zirconiumpropoxide, ethylsilicate, 1,1,2,2-tetrahydroct
  • the invention is a method of non-chromate pretreatment especially for magnesium alloy.
  • the treating step is to have the magnesium alloy surface degreased and water rinsed first and then acid treatment before carrying out film coating.
  • the alloy surface is treated with a mixed solution of organic and inorganic acid to let the alloy surface present metal original color or gray or black and become activated to form a thin film afterward.
  • the treatment on metal surface with a mixed solution of organic and inorganic acid can remove oxidization layer from the metal surface and form hydroxyl group thereon to facilitate sequent film treatment.
  • a method of non-chromate pretreatment for metal alloys, inclusive of aluminum alloy, titanium alloy, zinc alloy or copper alloy as shown in Fig. 2 is to have the alloy surface degreased and cleaned first and then carry out spray coating, dip coating or roller coating and then bake it for five to thirty minutes at a temperature 150°C ⁇ 200°C to get a film with a thickness around 0.5 ⁇ 1 ⁇ m.
  • the steps of treating the alloy surface are as follows.
  • a preferred embodiment of a method of non-chromate pretreatment for magnesium alloy in the present invention includes the following steps:
  • the modes of the film treatment in the steps of the preferred embodiment mentioned above may have the following processes.
  • the alloy surface formed with a thin film and treated through the above-mentioned processes is tested by salt spraying for twenty four hours, The result is that less than 5% corrosion area of the alloy surface that means the treated alloy performming well in quality.
  • the alloy treated through the foresaid processes passes the adhesion tested per ASTM D3359-97 by over coat on the treated alloy surface. Further, the alloy treated through the foresaid processes is tested in conductivity by means of a HP milliohmer (HP4338) and the result is less than 0.3 m ⁇ , it means that the alloy surface has good conductivity.
  • HP milliohmer HP4338
  • the method of non-chromate pretreatment for magnesium alloys in the invention has the following advantages.

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  • 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)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Treatment Of Metals (AREA)
EP03001023A 2003-01-17 2003-01-17 Method of non-chromate pretreatment for metal alloys Expired - Lifetime EP1439243B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT03001023T ATE389738T1 (de) 2003-01-17 2003-01-17 Chromatfreies vorbehandlungsverfahren für metallegierungen
DE60319795T DE60319795T2 (de) 2003-01-17 2003-01-17 Chromatfreies Vorbehandlungsverfahren für Metallegierungen
EP03001023A EP1439243B1 (en) 2003-01-17 2003-01-17 Method of non-chromate pretreatment for metal alloys
ES03001023T ES2302873T3 (es) 2003-01-17 2003-01-17 Metodo de pretratamiento sin cromato para aleaciones de metal.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03001023A EP1439243B1 (en) 2003-01-17 2003-01-17 Method of non-chromate pretreatment for metal alloys

Publications (2)

Publication Number Publication Date
EP1439243A1 EP1439243A1 (en) 2004-07-21
EP1439243B1 true EP1439243B1 (en) 2008-03-19

Family

ID=32524151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03001023A Expired - Lifetime EP1439243B1 (en) 2003-01-17 2003-01-17 Method of non-chromate pretreatment for metal alloys

Country Status (4)

Country Link
EP (1) EP1439243B1 (es)
AT (1) ATE389738T1 (es)
DE (1) DE60319795T2 (es)
ES (1) ES2302873T3 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107739929A (zh) * 2017-11-29 2018-02-27 西华大学 一种高耐候性铝合金及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8916020B2 (en) 2007-12-05 2014-12-23 3M Innovative Properties Company Assembly bonded to a structural adhesive and method and applicator for making it

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723057A (en) * 1980-07-17 1982-02-06 Hitachi Ltd Surface treatment of magnesium or magnesium alloy
JPH0234790A (ja) * 1988-07-21 1990-02-05 Nisshin Steel Co Ltd 耐久性、有機樹脂との密着性に優れた表面処理綱板の製造方法
IN176027B (es) * 1988-08-12 1995-12-23 Alcan Int Ltd

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107739929A (zh) * 2017-11-29 2018-02-27 西华大学 一种高耐候性铝合金及其制备方法

Also Published As

Publication number Publication date
DE60319795D1 (de) 2008-04-30
EP1439243A1 (en) 2004-07-21
ES2302873T3 (es) 2008-08-01
ATE389738T1 (de) 2008-04-15
DE60319795T2 (de) 2009-04-16

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