WO1999018257A1 - Surfaces zinguees a couche de conversion resistant au noircissement et a la rouille blanche - Google Patents

Surfaces zinguees a couche de conversion resistant au noircissement et a la rouille blanche Download PDF

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Publication number
WO1999018257A1
WO1999018257A1 PCT/US1998/020486 US9820486W WO9918257A1 WO 1999018257 A1 WO1999018257 A1 WO 1999018257A1 US 9820486 W US9820486 W US 9820486W WO 9918257 A1 WO9918257 A1 WO 9918257A1
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WO
WIPO (PCT)
Prior art keywords
dissolved
ions
chromium
composition
molar ratio
Prior art date
Application number
PCT/US1998/020486
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English (en)
Inventor
Yuzuru Matsubara
Akira Kato
Original Assignee
Henkel Corporation
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 Henkel Corporation filed Critical Henkel Corporation
Priority to US09/529,197 priority Critical patent/US6461449B1/en
Priority to AU97808/98A priority patent/AU9780898A/en
Publication of WO1999018257A1 publication Critical patent/WO1999018257A1/fr

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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
    • C23C22/30—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 containing also trivalent chromium
    • 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
    • C23C22/33—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 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
    • C23C22/34—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
    • C23C22/38—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 containing also phosphates

Definitions

  • the present invention concerns a composition and method for conversion coating a zinciferous surface, without any need for a preparatory flash treatment using Ni or Co, or the like, to make the zinciferous surface superior in its resistance to blackening and
  • a zinciferous surface includes a surface of pure zinc, any zinc alloy that includes at least 50 % by weight of zinc, and any alloy of zinc and aluminum that includes up to 55 % aluminum.
  • the invention is particularly advantageously used on zinc plated steel sheet such as is commonly made by depositing a zinciferous surface on a steel substrate by electrolysis or by coating the substrate with molten zinc o or zinc alloy.
  • the invention will be further described hereinafter in terms of its use on zinc-plated steel sheet, but it should be understood to be applicable, mutatis mutandis, to other zinciferous surfaces.
  • a flash treatment (this refers to a treatment in which an extremely small amount of a metal is chemically deposited; see further below) using an aqueous solution which contains metal ions of Ni or Co as taught in Japanese Patent Application Kokai No. SHO59-177381 is currently viewed as being a powerful countermeasure.
  • the gist of the invention in the aforementioned patent is that prior to the chromate treatment of a steel plate plated with zinc or a zinc alloy, the surface of the steel sheet is subjected to a flash treatment using an aqueous solution which has a pH of 1 to 4 or 11 to 13.5, and which contains metal ions of Ni or Co, or both, as a means of suppressing the above- mentioned black rust.
  • a flash treatment using an aqueous solution which has a pH of 1 to 4 or 11 to 13.5, and which contains metal ions of Ni or Co, or both, as a means of suppressing the above- mentioned black rust.
  • the sheet is washed with water, after which a chromate coating film is formed.
  • black rust is inhibited
  • white rust tends to be generated.
  • Japanese Patent Application Kokai No. HEI 5-331659 and Japanese Patent Ap- plication Kokai No. HEI 7-54156 teach methods which can simultaneously suppress both blackening and the generation of white rust by means of a single process consisting only of a chromate treatment, without any need for a two-process treatment consisting of a preparatory flash treatment and a chromate treatment.
  • user needs in recent years have required highly stable resistance to blackening and resistance to white rust over a longer period of time regardless of variation in the activity of the plated surface, and such requirements cannot be satisfied using the above-mentioned conventional techniques.
  • the problems which the present invention attempts to solve are one or more of the above-mentioned problems in the prior art.
  • the object of the present invention is therefore to provide to zinc-plated steel sheets a high resistance to blackening and white rust over a long period of time, regardless of any variation in the activity of the plated surface of the zinc-plated steel sheet.
  • aqueous conversion coating forming liquid treatment composition that has both of the following properties (A) and (B):
  • composition comprises, preferably consists essentially of, or more preferably consists of water and the following components:
  • (A.4) dissolved cations of one or more metals selected from the group consisting of Ni, Co, Zn and Al; and, optionally, one or more of the following components: (A.5) dissolved phosphate ions; (A.6) dissolved fluoride ions;
  • (B) in the liquid treatment composition (B.1) the molar ratio of dissolved trivalent chromium ions to hexavalent chromium atoms is in a range from 0.11 : 1.0 to 1.0: 1.0; (B.2) the molar ratio of nitrate ions to total chromium atoms (i.e., the sum of hexavalent chromium atoms and trivalent chromium cations) is in a range from 2.1 :1.0 to 5.5:1.0; (B.3) the molar ratio of the total of dissolved metal cations that are selected from the group consisting of Ni, Co, Zn and Al to nitrate ions is in a range from 0.05:1.0 to 1.0:1.0; (B.4) the molar ratio of dissolved phosphate ions 1 to total chromium atoms is not more than 0.3:1.0; and (B.5) the molar ratio of dissolved fluoride ions 1 to total chromium
  • a process according to the invention comprises an operation in which a liquid film of a treatment composition as described immediately above is formed over a zinciferous substrate and then dried, thus forming an adherent dry coating with a chromium content of 10 to 100 milligrams of chromium per square meter of surface coated, this unit of areal density or coating weight being hereinafter usually abbreviated as "mg/m 2 ".
  • mg/m 2 this unit of areal density or coating weight
  • the ratio assumed to be 0.0:1.0. in a chromate containing treatment solution used in the present invention is preferably- in the range of 0.25:1.0 to 0.67:1.0. If the molar ratio of trivalent chromium ions to hexavalent chromium atoms is less than 0.11 :1.0, the elution of chromium ions in a corrosive environment is excessive, leading to environmental contamination, which is undesirable. On the other hand, if the molar ratio of trivalent chromium ions to hexavalent chromium atoms exceeds 1.0:1.0, the corrosion resistance of the treated substrate is insufficient; this is also undesirable.
  • the preferred source of dissolved hexavalent chromium atoms for a treatment composition according to the invention is the material known variously as chromic acid, chromic anhydride, and chromium trioxide, with the chemical formula CrO 3 . If more of it is added to the composition than corresponds to the desired concentration of hexavalent chromium atoms, it may be partially reduced to provide at least some of the trivalent chromium cations. Alternatively or concurrently, these latter cations may be provided to the treatment composition by water soluble salts such as chromium nitrate.
  • the nitrate ions may be provided by addition of nitric acid, chromium nitrate, or nitric acid salts of the metal ions selected from the group consisting of Ni, Co, Zn and Al.
  • the concentration of nitrate ions is insufficient to obtain a highly stable resistance to blackening over a long period of time.
  • the etching rate becomes higher than desirable, so that the oxide layer on the plated surface is rapidly dissolved, leading to activation of the surface.
  • elution of the resulting chromate coating film in a corrosive environment becomes excessive, so that the resistance to white rust drops; this is undesirable.
  • the required Ni, Co, Zn, and/or Al ions may be supplied to the treatment composition by any soluble salt of these metal ions.
  • Preferred sources include nitrates, basic carbonates, phosphates, oxides and hydroxides. If the molar ratio of metal ions to nitrate ions is less than 0.05, the pH of the chromate solution will become excessively low, so that the plated surface will be activated to a greater extent than is necessary as a re- suit of contact of the liquid with the zinc-plated steel sheets.
  • the effectiveness of the chromate treatment solution can be stably maintained even in the case of long-term use involving continuous operation, so that a stable coating film performance can also be insured.
  • phosphate ions and/or fluoride ions in the treatment solution of the present invention, it is possible to achieve a further improvement in the chromium leaching resistance and white rust resistance of the chromate coating film. If the molar ratio of phosphate ions to total chromium atoms exceeds 0.3, the chromium leaching resistance is improved, but the resistance to blackening deteriorates.
  • the fluoride ions may be supplied as simple or complexed fluorides from any water soluble source, but preferably are supplied by means of hexafluorosilicic acid, tetrafluoroboric acid, hexa- fluorotitanic acid, hexafiuorozirconic acid, and/or one or more salts of all of these acids that contain complexed fluoride ions. If the molar ratio of fluoride ions to total chromium atoms exceeds 0.1 , the chromium leaching resistance is increased, but the resistance to blackening deteriorates.
  • a treatment solution of the present invention may contain (if necessary or desirable) colloidal silica preparations such as silica sols or fumed silica, etc., which have been disclosed in large numbers in the past in Japanese Patent Application Kokoku No. SHO 42-14050, Japanese Patent Application Kokoku No. SHO 61-58522, Japanese Patent Application Kokai No. SHO 61-284581 , Japanese Patent Application Kokai No. SHO 63-218279, Japanese Patent Application Kokai No. SHO 63-307281, Japanese Patent Application Kokai No. SHO 64-65272, Japanese Patent Application Kokai No. HE1 1-283382, Japanese Patent Application Kokoku No. HEI 3-66391, Japanese Patent Application Kokoku No.
  • a dry chromate conversion coating is formed by applying a layer of a liquid coating composition according to the invention as described above to the surface of the zinc-plated steel sheet, and then drying the applied solution without washing with water. It is desirable that the layer of coating film applied, and therefore the dried conversion coating obtained, should contain from 10 to 100 mg/m 2 of chromium. If the amount of chromium in the conversion coating is less than 10 mg/m 2 , the . corrosion resistance will usually be insufficient. On the other hand, if the amount of chromium in the coating exceeds 100 mg/m 2 , the corrosion resistance will not further improve, so that the use of such an amount is uneconomical.
  • any excess of the treatment composition may be removed by means of passing between suitably spaced roils, use of an air knife, or the like; alternatively, a controlled amount of the treatment solution may been applied by means of a roll coater, curtain coater, or the like.
  • a chromate coating film is formed by drying the layer of the treatment composition by means of a heating method such as heated air, infrared radiation, far infrared radiation or induction heating, etc., without any washing with water.
  • the drying conditions used are such that the moisture content of the coating film is evaporated; ordinarily, the maximum temperature attained is in the range of 40 to 250 °C.
  • composition and method according to this invention make it possible to provide zinc-plated steel sheets that simultaneously satisfy requirements for highly stable blackening resistance and white rust resistance over a long period of time; this could not be achieved using prior art techniques.
  • test sheets described below were subjected to alkali degreasing, water washing and drying as described in numbered items (2) through (4) below, and were then subjected to a chromate treatment by the processes described in numbered items (5) and (6) below. Furthermore, the respective treated test sheets were subjected to a chromium leaching resistance as described in numbered item (7) below and to an accelerated blackening test and an accelerated white rust test as described in paragraphs (8) and (9) below.
  • Test substrates zinc-coated steel sheets steel sheets hot-dipped in molten zinc steel sheets hot-dipped in molten zinc - 5% aluminum alloy - steel sheets hot-dipped in molten zinc - 55% aluminum alloy
  • Chromium leaching resistance test The zinc-plated steel sheets which had been subjected to a chromate treatment were subjected to alkaline leaching under the conditions described below. The amounts of adhering chromium before and after leaching were measured by means of a fluorescent X-ray analyzer, and the chromium leaching resistance was calculated using the formula shown below. A larger percent value indicates a superior chromium leaching resistance.
  • Alkaline leaching was accomplished by a 2 minute spray treatment at 60 °C using a 2 % aqueous solution of an alkaline degreasing agent (PALKLIN® N364S manufactured by Nihon Parkerizing Co., Ltd.).
  • an alkaline degreasing agent (PALKLIN® N364S manufactured by Nihon Parkerizing Co., Ltd.).
  • Chromium leaching resistance (A A Q ) * 100 (%), where A represents the amount of chromium coating film in mg/m 2 following alkaline leaching and , represents the amount of chromium coating film in mg/m 2 before alkaline leaching.
  • 70 mm x 150 mm test samples from the respective test sheets were arranged as facing pairs, and 5 to 10 of these pairs were stacked and wrapped in vinyl-coated paper. This stack was then compressed between two rectangular strong metal plates with a bolt hole in each of their four corners, and a load of 70 kilograms force- centimeters was applied with a torque wrench to the nuts on the bolts holding the two plates together. Then, after being held for 360 hours in a humidity cabinet at a temperature of 70 °C and a relative humidity of 80 %, the samples were removed, and the conditions of blackening in the overlapping parts were ascertained by visual inspection. The evaluation criteria used were as follows: ++ : No blackening + : Extremely light graying
  • ⁇ 5% or more but less than 25% surface area showing white rust
  • the conversion coating treatment compositions are detailed in Table 1 , and the amount of chromium in the conversion coatings formed, chromium leaching resistance, and results of the accelerated blackening test and accelerated white rust test are shown in Tables 2 through 4.
  • Table 1 the amount of chromium in the conversion coatings formed, chromium leaching resistance, and results of the accelerated blackening test and accelerated white rust test are shown in Tables 2 through 4.
  • Tables 2 through 4 As is shown in these Tables, when treating any of the substrates with compositions according to the invention, it is possible to improve the resistance to blackening and the resistance to white rust with good balance in terms of high stability over a long period of time, even without performing a metal flash treatment. Accordingly, a single-process treatment may be performed instead of a two-process treatment in which a chromate treatment is performed following a pretreatment.
  • the amount of etching of the material is limited, it is clear that industrially useful effects such as superior continuous-operation characteristics can be obtained.
  • composition also contained colloidal silica (SNOWTEXTM O manufactured by Nissan Kagaku) in an amount with a ratio to total chromium atoms by weight of 4.
  • colloidal silica SNOWTEXTM O manufactured by Nissan Kagaku
  • This composition also contained an acrylic resin emulsion (manufactured by Hekisuto Gosei), a copolymer of methyl methacrylate and butyl aery late with a molecular weight of 200,000 or greater, emulsified with polyoxyethylene aikylphenyl ether and alkylbenzenesulfonates in an amount such that the ratio by weight of resin solids to total chromium atoms was 20.
  • an acrylic resin emulsion manufactured by Hekisuto Gosei
  • a copolymer of methyl methacrylate and butyl aery late with a molecular weight of 200,000 or greater
  • polyoxyethylene aikylphenyl ether and alkylbenzenesulfonates in an amount such that the ratio by weight of resin solids to total chromium atoms was 20.

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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)
  • Chemical Treatment Of Metals (AREA)

Abstract

Il est possible de doter des surfaces métalliques en particulier des surfaces d'acier zinguées, d'une couche de conversion au chromate supérieure en termes de résistance au noircissement et à la rouille blanche en faisant sécher sur place sur lesdites surfaces une couche d'un liquide de traitement. Ledit liquide contient: de l'eau, des atomes de chrome hexavalents, des cations de chrome trivalents, des ions nitrate, et un ou plusieurs ions métalliques choisis parmi Ni, Co, Zn et Al, le rapport molaire du total de ces ions métalliques aux ions nitrate allant de 0,05 à 1,0, le rapport molaire des ions de chrome trivalent aux atomes de chrome hexavalents allant de 0,11/1,0 à 1,0/1,0, et le rapport molaire des ions nitrate au total des atomes de chrome allant de 2,1 à 5,5. Le revêtement a une teneur en chrome allant de 10 à 100 mg/m2.
PCT/US1998/020486 1997-10-07 1998-10-07 Surfaces zinguees a couche de conversion resistant au noircissement et a la rouille blanche WO1999018257A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09/529,197 US6461449B1 (en) 1997-10-07 1998-10-07 Conversion coating zinciferous surfaces to resist blackening and white rust
AU97808/98A AU9780898A (en) 1997-10-07 1998-10-07 Conversion coating zinciferous surfaces to resist blackening and white rust

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP29026397A JPH11106944A (ja) 1997-10-07 1997-10-07 耐黒変性及び耐白錆性に優れた亜鉛系めっき鋼板の製造方法
JP9-290263 1997-10-07

Publications (1)

Publication Number Publication Date
WO1999018257A1 true WO1999018257A1 (fr) 1999-04-15

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PCT/US1998/020486 WO1999018257A1 (fr) 1997-10-07 1998-10-07 Surfaces zinguees a couche de conversion resistant au noircissement et a la rouille blanche

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JP (1) JPH11106944A (fr)
AU (1) AU9780898A (fr)
WO (1) WO1999018257A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1585848A2 (fr) * 2003-01-23 2005-10-19 The United States of America as Represented by The Secretary of The Navy Pretraitement d'aluminium et des alliages d'aluminium
EP1585847A2 (fr) * 2003-01-23 2005-10-19 The United States of America as Represented by The Secretary of The Navy Post-traitement pour des substrats recouverts de metal

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU539091A1 (ru) * 1973-12-10 1976-12-15 Ордена Трудового Красного Знамени Институт Химии И Химической Технологии Ан Литовской Сср Водный раствор дл пассивировани цинковой поверхности
JPS63171685A (ja) * 1986-12-30 1988-07-15 Nippon Steel Corp 耐食性白色クロメ−ト処理方法
JPS63178873A (ja) * 1987-01-19 1988-07-22 Nippon Steel Corp 耐食性および塗装性に優れたクロメ−ト処理メツキ鋼板の製造方法
US4812175A (en) * 1985-09-06 1989-03-14 Parker Chemical Company Passivation process and copmposition for zinc-aluminum alloys
US4963198A (en) * 1988-02-08 1990-10-16 Brent Chemicals International Plc Composition and process for treating metal surfaces
WO1992003594A1 (fr) * 1990-08-28 1992-03-05 Henkel Corporation Composition et procede de chromatage du metal
US5268042A (en) * 1991-06-28 1993-12-07 Henkel Corporation Composition and process for forming improved, non-cracking chromate conversion coatings
WO1994002661A1 (fr) * 1992-07-20 1994-02-03 Henkel Corporation Procede de traitement de l'acier visant a reduire au minimum la corrosion filiforme

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU539091A1 (ru) * 1973-12-10 1976-12-15 Ордена Трудового Красного Знамени Институт Химии И Химической Технологии Ан Литовской Сср Водный раствор дл пассивировани цинковой поверхности
US4812175A (en) * 1985-09-06 1989-03-14 Parker Chemical Company Passivation process and copmposition for zinc-aluminum alloys
JPS63171685A (ja) * 1986-12-30 1988-07-15 Nippon Steel Corp 耐食性白色クロメ−ト処理方法
JPS63178873A (ja) * 1987-01-19 1988-07-22 Nippon Steel Corp 耐食性および塗装性に優れたクロメ−ト処理メツキ鋼板の製造方法
US4963198A (en) * 1988-02-08 1990-10-16 Brent Chemicals International Plc Composition and process for treating metal surfaces
WO1992003594A1 (fr) * 1990-08-28 1992-03-05 Henkel Corporation Composition et procede de chromatage du metal
US5268042A (en) * 1991-06-28 1993-12-07 Henkel Corporation Composition and process for forming improved, non-cracking chromate conversion coatings
WO1994002661A1 (fr) * 1992-07-20 1994-02-03 Henkel Corporation Procede de traitement de l'acier visant a reduire au minimum la corrosion filiforme

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1585848A2 (fr) * 2003-01-23 2005-10-19 The United States of America as Represented by The Secretary of The Navy Pretraitement d'aluminium et des alliages d'aluminium
EP1585847A2 (fr) * 2003-01-23 2005-10-19 The United States of America as Represented by The Secretary of The Navy Post-traitement pour des substrats recouverts de metal
EP1585847A4 (fr) * 2003-01-23 2009-05-06 Us Navy Post-traitement pour des substrats recouverts de metal
EP1585848A4 (fr) * 2003-01-23 2009-05-06 Us Navy Pretraitement d'aluminium et des alliages d'aluminium

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Publication number Publication date
JPH11106944A (ja) 1999-04-20
AU9780898A (en) 1999-04-27

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