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WO1992005297A1 - Articles a revetement resistants a la corrosion et procede de fabrication de ces articles - Google Patents

Articles a revetement resistants a la corrosion et procede de fabrication de ces articles Download PDF

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Publication number
WO1992005297A1
WO1992005297A1 PCT/US1991/006758 US9106758W WO9205297A1 WO 1992005297 A1 WO1992005297 A1 WO 1992005297A1 US 9106758 W US9106758 W US 9106758W WO 9205297 A1 WO9205297 A1 WO 9205297A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
parts
article
water
composition
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.)
Ceased
Application number
PCT/US1991/006758
Other languages
English (en)
Inventor
William J. Howard
William E. Emmons
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.)
Michigan Chrome and Chemical Co
Original Assignee
Michigan Chrome and Chemical Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Michigan Chrome and Chemical Co filed Critical Michigan Chrome and Chemical Co
Publication of WO1992005297A1 publication Critical patent/WO1992005297A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • C23C22/37—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 hexavalent chromium compounds
    • 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
    • C23C22/24—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 hexavalent chromium compounds
    • 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 articles having integral chemically-formed surface coatings that provide an improved combination of adherence and corrosion resistant properties to such products and to a process for making same. More particularly, the articles of this invention have on their surfaces an integral, chemically-formed coating that is strongly adherent and resistant to chipping or flaking at elevated temperatures and provides to the product a unique combination of corrosion properties including commercially satisfactory resistance to oxidation during use in gases at elevated temperatures such as encountered in the engine compartments of vehicle engines, resistance to corrosion from humidity, from organic solvents such as ethylene glycol, oils and gasoline, from acidic or alkaline solutions such as salt spray to the extent that is required of a base for paint or other protective organic or water-based protective coating on parts used within the engine compartments of vehicles.
  • Chromate-phosphates were developed in the 1940 , s as paint base coatings and disclosed in U.S. Patent 2,438,877 and later modified as disclosed in British Patent 1,114,645 and French Patent 1,477,179 (all of which are hereby expressly incorporated by reference) . Chromate processes developed during the 1960 , s and 1970's have been asserted to provide improved paint bases relative to the chromate-phosphate coatings and are disclosed in a number of United States patents, including U. S.
  • Patents 3,009,482, 3,391,031, 3,404,043, 3,410,707, 3,447,972, 3,446,717, 3,982,951, 4,036,667, 4,146,410 and British Patent 1,409,413, all of which are hereby expressly incorporated by reference.
  • a number of additional patents discuss various types of chemical coatings, protective layers or processes, and include U. S. Patent Nos. Re. 28,015, Re.
  • the present invention provides articles that are coated with a new integral coating that results in good corrosion resistance and resistance to dislodgment during use in environments, such as vehicle environments.
  • This invention also provides an economic, continuous process for producing the new coated articles of this invention, as will be described hereinafter.
  • the coating contains as its essential component a chemical complex of alkali metal- chromium-silicates as defined in the claims.
  • the coating contains as its essential components a "water glass” complex of alkali metal-silicates and water; a metallic oxide; and a lithium-containing compound.
  • the amount of the essential components in the coating in each preferred embodiment is that which is sufficient to provide the coated articles with an unexpectedly unique combination of properties of appearance, adherence, resistance to chipping and flaking, corrosion resistance to acidic and alkaline gases and aqueous solutions and oils, solvents and fuels, and is sufficient to make it suitable as a surface treatment, such as a base for paint and the equivalent of paint on parts within the engine compartment of vehicles.
  • the preferred coatings are colorless and so thin as to be virtually invisible to the naked eye.
  • the coating thickness varies from about 50 angstroms, or 0.0005 micron, to about 2 microns.
  • the new articles of this invention include articles fabricated from aluminum, zinc, cadmium, magnesium or their alloys which have on their surfaces a thin adherent coating having a thickness up to about 2 microns, and comprising as its essential components a water glass complex, a metallic oxide, and a lithium-containing compound.
  • Water glass complexes are known in the art and typically include an alkali metal-silicate (such as including Na 2 0 and Si0 2 ) and water.
  • the constituents of the water glass eg.
  • H 2 0, Na 2 0 and Si0 2 are present at or near their art- disclosed levels, and more preferably are present such that the proportions of each, expressed in percent, by weight of the final bath composition (wherein "the final bath composition” refers to an aqueous solution in which the coating has been dissolved or dispersed) are: Na 2 0 in an amount of about 0.44 to about
  • the metallic oxide-containing compound preferably Mo0 3
  • the metallic oxide-containing compound is present in an amount of about 0.1 to about 1.0%, more preferably from about 0.5 to about 1.0% and still more preferably at about 0.50%, by weight of the final bath composition.
  • step 2 2) contacting the cleaned article from step 1 with an aqueous, strongly acidic solution capable of removing surface aluminum oxides;
  • step 3 contacting the clean, rinsed, substantially oxide-free article of step 2 with an aqueous acidic solution for forming a chromium- silicate-containing adherent surface coating;
  • TMith a solution (i.e. bath) capable of forming a coating, wherein the coating is made by adding to water an admixture containing the following composition, expressed in percent, by weight of the final bath composition:

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)

Abstract

Articles métalliques et procédé de fabrication de ces articles, lesquels comportent sur leur surface un revêtement mince et adhésif, produit par procédé chimique, qui préserve l'apparence de l'article sans revêtement et lui confère une combinaison unique de caractéristiques fonctionnelles comprenant la résistance à l'écaillage en cours d'utilisation à des températures élevées, la résistance à la corrosion par des produits chimiques sous forme de gaz ou de solutions acides ou alcalines aqueuses, y compris le brouillard salin, les solvants organiques, les huiles et les carburants de voitures, et une utilisation appropriée comme support pour la peinture de pièces à l'intérieur du compartiment à moteur de véhicules.
PCT/US1991/006758 1990-09-19 1991-09-18 Articles a revetement resistants a la corrosion et procede de fabrication de ces articles Ceased WO1992005297A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58477190A 1990-09-19 1990-09-19
US584,771 1990-09-19

Publications (1)

Publication Number Publication Date
WO1992005297A1 true WO1992005297A1 (fr) 1992-04-02

Family

ID=24338718

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/006758 Ceased WO1992005297A1 (fr) 1990-09-19 1991-09-18 Articles a revetement resistants a la corrosion et procede de fabrication de ces articles

Country Status (1)

Country Link
WO (1) WO1992005297A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0590594A1 (fr) * 1992-10-01 1994-04-06 ALUFINISH GmbH + Co. KG Traitement de surfaces métalliques pour améliorer leur propriété adhésive et leurs propriétés anti-corrosion
WO1996017978A1 (fr) * 1994-12-03 1996-06-13 Galol, S.A. Procede de traitement anticorrosif pour cables tresses et systeme d'entrainement
ES2089976A1 (es) * 1994-12-03 1996-10-01 Galol Sa Procedimiento de tratamiento anticorrosivo para cables trenzados.

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3130061A (en) * 1961-02-06 1964-04-21 American Pipe & Constr Co Inorganic coating composition
US3180746A (en) * 1961-08-03 1965-04-27 Exxon Research Engineering Co Protective coating
US3272665A (en) * 1963-04-24 1966-09-13 Reynolds Metals Co Molybdate coatings on aluminum and aluminum base alloys
US3356515A (en) * 1965-12-27 1967-12-05 Exxon Research Engineering Co High temperature protective coating
US3592747A (en) * 1966-08-17 1971-07-13 Samuel L Cohn & Charles C Cohn Method of forming a decorative and protective coating on a surface
US3832239A (en) * 1969-12-03 1974-08-27 Lockheed Aircraft Corp Production of clear,sealed anodized films
US3969127A (en) * 1972-07-07 1976-07-13 The Sherwin-Williams Company Molybdate corrosion inhibiting pigment and method for preparing same
JPS5782476A (en) * 1980-11-10 1982-05-22 Kobe Steel Ltd Method for preventing discoloration of surface of aluminum material against hot water
US4509254A (en) * 1983-05-13 1985-04-09 The Dow Chemical Company Method for molybdenum-coated aluminum current collector for alkali metal/sulfur battery cells
US4810300A (en) * 1986-11-06 1989-03-07 Zyp Coatings, Inc. Binder/suspension composition yielding water insolubility alone or with additives
US4867791A (en) * 1986-10-16 1989-09-19 Hans Jaklin Process for subsurface reconstruction of buildings reinforced with constructional steel

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3130061A (en) * 1961-02-06 1964-04-21 American Pipe & Constr Co Inorganic coating composition
US3180746A (en) * 1961-08-03 1965-04-27 Exxon Research Engineering Co Protective coating
US3272665A (en) * 1963-04-24 1966-09-13 Reynolds Metals Co Molybdate coatings on aluminum and aluminum base alloys
US3356515A (en) * 1965-12-27 1967-12-05 Exxon Research Engineering Co High temperature protective coating
US3592747A (en) * 1966-08-17 1971-07-13 Samuel L Cohn & Charles C Cohn Method of forming a decorative and protective coating on a surface
US3832239A (en) * 1969-12-03 1974-08-27 Lockheed Aircraft Corp Production of clear,sealed anodized films
US3969127A (en) * 1972-07-07 1976-07-13 The Sherwin-Williams Company Molybdate corrosion inhibiting pigment and method for preparing same
JPS5782476A (en) * 1980-11-10 1982-05-22 Kobe Steel Ltd Method for preventing discoloration of surface of aluminum material against hot water
US4509254A (en) * 1983-05-13 1985-04-09 The Dow Chemical Company Method for molybdenum-coated aluminum current collector for alkali metal/sulfur battery cells
US4867791A (en) * 1986-10-16 1989-09-19 Hans Jaklin Process for subsurface reconstruction of buildings reinforced with constructional steel
US4810300A (en) * 1986-11-06 1989-03-07 Zyp Coatings, Inc. Binder/suspension composition yielding water insolubility alone or with additives

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0590594A1 (fr) * 1992-10-01 1994-04-06 ALUFINISH GmbH + Co. KG Traitement de surfaces métalliques pour améliorer leur propriété adhésive et leurs propriétés anti-corrosion
WO1996017978A1 (fr) * 1994-12-03 1996-06-13 Galol, S.A. Procede de traitement anticorrosif pour cables tresses et systeme d'entrainement
ES2089976A1 (es) * 1994-12-03 1996-10-01 Galol Sa Procedimiento de tratamiento anticorrosivo para cables trenzados.
GB2301378A (en) * 1994-12-03 1996-12-04 Galol Sa Anticorrosive treatment process for braided cables and drive system
GB2301378B (en) * 1994-12-03 1998-12-30 Galol Sa Procedure for anticorrosive treatment for braided cables and pulling system
AT404738B (de) * 1994-12-03 1999-02-25 Galol Sa Verfahren zur antikorrosionsbehandlung für geflochtene kabel und ziehverfahren für diese

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