EP0837954A1 - Compositions et procede pour traiter la surface de metaux alumineux - Google Patents

Compositions et procede pour traiter la surface de metaux alumineux

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Publication number
EP0837954A1
EP0837954A1 EP96924286A EP96924286A EP0837954A1 EP 0837954 A1 EP0837954 A1 EP 0837954A1 EP 96924286 A EP96924286 A EP 96924286A EP 96924286 A EP96924286 A EP 96924286A EP 0837954 A1 EP0837954 A1 EP 0837954A1
Authority
EP
European Patent Office
Prior art keywords
acid
dissolved
ions
atoms
calculated
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.)
Withdrawn
Application number
EP96924286A
Other languages
German (de)
English (en)
Other versions
EP0837954A4 (fr
Inventor
Hiroyuki-Nihon Parkerizing Ohgami Dormitory WADA
Kazuya Nakada
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.)
Henkel Corp
Original Assignee
Henkel Corp
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Filing date
Publication date
Application filed by Henkel Corp filed Critical Henkel Corp
Publication of EP0837954A1 publication Critical patent/EP0837954A1/fr
Publication of EP0837954A4 publication Critical patent/EP0837954A4/fr
Withdrawn legal-status Critical Current

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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
    • C23C22/40—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
    • C23C22/06—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
    • C23C22/361—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 containing titanium, zirconium or hafnium compounds

Definitions

  • This invention relates to a novel Iiquid surface treatment composition and process for application to aluminiferous metals, which provide the surface of aluminiferous metals, i.e., aluminum and aluminum alloys containing at least 65 % by weight of aluminum, with an excellent corrosion resistance and paint adher ⁇ ence.
  • the present invention is applied with particularly good effect in the surface treatment of aluminum alloys in coil and sheet form.
  • Liquid compositions which hereinafter are often called “baths" for brevity, even if used by some other method than immersion, that are in general use for treating the surface of aluminiferous metals can be broadly classified into chrom ⁇ ate types and nonchromate types.
  • Chromic acid chromate conversion baths and phosphoric acid chromate conversion baths are typical embodiments of chrom ⁇ ate type treatment baths. Chromic acid chromate conversion baths came into practical use in about
  • the chromic acid chromate conversion baths con ⁇ tain chromic acid and fluoride as their main components, with the fluoride func ⁇ tioning as a reaction accelerator. These baths coat metal surfaces with conver- sion coatings containing some quantity of hexavalent chromium.
  • Phosphoric acid chromate conversion baths originated with the invention disclosed in United States Patent Number 2,438,877. These conversion baths, which contain chromic acid, phosphoric acid, and hydrofluoric acid as their main components, coat metal surfaces with conversion coatings whose main compon- ent is hydrated chromium phosphate. Because these conversion coatings do not contain hexavalent chromium, they also are in wide use at present, for such ap ⁇ plications as underpaint coatings for beverage can body and lid stock.
  • Typical of the inventions in the field of the chromium-free nonchromate type surface treatment baths is the process disclosed in Japanese Patent Appli- cation Laid Open [Kokai or Unexamined ⁇ Number ⁇ ho 52-131937 [131 ,937/ 1977].
  • the treatment bath in that reference consists of an acidic (pH approxi ⁇ mately 1.5 to 4.0) aqueous coating solution containing phosphate, fluoride, and zirconium or titanium or both. Treatment of the metal surface with this surface treatment bath forms thereon a protective coating whose main component is zir- conium or titanium oxide.
  • nonchromate surface treatment baths are free of hexavalent chromium, and this advantage has resulted in their wide use at the present time for treating the surface of drawn-and-ironed ("Dl") aluminum cans and the like.
  • Dl drawn-and-ironed
  • the nonchromate baths require longer treatment times for coating formation than chromate surface treatment baths. Shortening surface treatment times has become an important issue in the last few years, because of the increasingly high line speeds being used to boost productivity.
  • nonchromate baths yield coatings with a corrosion resistance and paint adherence inferior to those of chromate coatings.
  • the treatment process disclosed in Japanese Patent Application Laid Open [Kokai or Unexamined] Number Hei 1-246370 [246,370/1989] is an inven ⁇ tion whose object is to shorten the aforementioned surface treatment times.
  • the aluminiferous metal surface is first cleaned with an alkaline de- greaser and the cleaned surface is then treated with an acidic (pH 1.5 to 4.0) aqueous solution containing 0.01 to 0.5 g/L of zirconium ions, 0.01 to 0.5 g/L of phosphate ions, 0.001 to 0.05 g/L, measured as its stoichiometric equivalent as fluorine atoms, of "free" fluoride ions, and optionally 0.01 to 1 g/L of vanadium ions.
  • an acidic (pH 1.5 to 4.0) aqueous solution containing 0.01 to 0.5 g/L of zirconium ions, 0.01 to 0.5 g/L of phosphate ions, 0.001 to 0.05 g/L, measured as its stoichiometric equivalent as fluorine atoms, of "free" fluoride ions, and optionally 0.01 to 1 g/L of vanadium ions.
  • the present invention is directed to solving the problems described above for the prior art.
  • the present invention provides a composition and process for treating the surface of aluminiferous metals that are able to form rapidly a very corrosion-resistant and highly paint-adherent coating on the sur ⁇ face of aluminiferous metals.
  • a concentrate or working composition according to the present invention for treating the surface of aluminiferous metals characteristically comprises, preferably consists essentially of, or more preferably consists of, water and the following materials in the relative proportions stated as follows: from 0.010 to 5 parts by weight of phosphate ions; from 0.010 to 2.0 parts by weight, calculated as its stoichiometric equivalent as titanium atoms, of dissolved titanium contain ⁇ ing substance(s); from 0.010 to 12 parts by weight, calculated as its stoichiomet- ric equivalent as fluorine atoms, of dissolved molecules and/or anions containing fluorine; and from 0.010 to 2.0 parts by weight of dissolved accelerator.
  • the accelerator increases the speed of coating formation and is selected from the group consisting of oxyacids, such as tungstic acid (i.e., H 2 WO 4 ), molyb- dic acid (i.e., HMoO 3 ), permanganic acid (i.e., HMnO , nitric acid (i.e., HNO 3 ), nitrous acid (i.e., HNO 2 ), hypochlorous acid (i.e., HCIO), chlorous acid (i.e., HCIO 2 ), chloric acid (i.e., HCIO 3 ), bromic acid (i.e., HBrO 3 ), iodic acid (i.e., HIO 3 ), perchloric acid (i.e., HCIO 4 ), perbromic acid (i.e., HBrO 4 ), periodic acid (i.e, HIO 4 ), orthoperiodic acid (i.e., H 5 IO 6 ), and salts
  • the four necessary active ingredients in a composition according to the invention as described above need not necessarily all be provided by separate chemical substances.
  • fluotitanic acid is well suited to be a single source of both titanium and fluoride.
  • a process according to the present invention for treating the surface of aluminiferous metals characteristically comprises the formation thereon of a coat- ing by bringing the surface of aluminiferous metal into contact, at a temperature from normal ambient temperature (i.e., at least 10 and more often at least 20 °C) to 80 °C, with a surface treatment working composition, and thereafter subjecting the surface of the aluminiferous metal carrying the surface treatment bath to a rinse with water and, usually, drying, often with the use of heat.
  • the source of the phosphate ions for a concentrate or working composi ⁇ tion according to the present invention can be one or more selections from ortho ⁇ phosphoric acid (i.e., H 3 PO 4 ) and neutral and acid salts thereof and condensed phosphoric acids, such as pyrophosphoric acid (i.e., H 4 P 2 O 7 ) and tripolyphos- phoric acid (i.e., H 5 P 3 O 10 ) and neutral and acid salts of any of these.
  • ortho ⁇ phosphoric acid i.e., H 3 PO 4
  • condensed phosphoric acids such as pyrophosphoric acid (i.e., H 4 P 2 O 7 ) and tripolyphos- phoric acid (i.e., H 5 P 3 O 10 ) and neutral and acid salts of any of these.
  • the particu ⁇ lar phosphate ions source selected is not critical, and the stoichiometric equiv ⁇ alent as phosphate ions from any ofthese sources is considered to be phosphate ions for determining whether a composition is according to the invention and if so, what its degree of preference is, irrespective of the actual extent of ionization and condensation to form chemical species with P-O-P bonds that may exist in solution.
  • the phosphate ions content in a working bath according to the present invention is preferably from 0.010 to 5.0 g/L, more preferably from 0.050 to 5.0 g/L, and even more preferably from 0.30 to 2.0 g/L.
  • the source of the titanium containing substance(s) in a working or con ⁇ centrate composition according to the present invention preferably is either a salt containing titanium and/or titanyl cations, the anions of which salt can be sulfate, fluoride, or the like, or fluotitanic acid or at least one of its salts, but the selection of the titanium containing substance(s) is not critical.
  • the titanium containing substance(s) concentration in a surface treatment bath according to the invention should be from 0.010 to 2.0 g/L and is preferably from 0J0 to 2.0 g/L or more preferably from 0J 0 to 1.0 g/L, in each instance calculated as titanium.
  • the source of fluoride in the composition and surface treatment bath ac ⁇ cording to the present invention can be such fluorine-containing acids as hydro ⁇ fluoric acid (i.e., HF), fluotitanic acid (i.e., H 2 TiF 6 ), fluosilicic acid (i.e., H 2 SiF 6 ), and fluozirconic acid (i.e., H- rF e ), as well as any of their neutral and acid salts, but again the selection of the fluoride is not critical.
  • hydro ⁇ fluoric acid i.e., HF
  • fluotitanic acid i.e., H 2 TiF 6
  • fluosilicic acid i.e., H 2 SiF 6
  • fluozirconic acid i.e., H- rF e
  • the fluoride content in the surface treatment bath should be in the range from 0.010 to 12 g/L, preferably is from 0.050 to 5.0 g/L, and more preferably is from 0J0 to 3.0 g/L, in each case calculated as fluorine.
  • Aluminum ions eluting from the substrate are stabilized in the bath as aluminum fluoride by the fluoride, and the content levels given above include the quantity of fluoride necessary to do this.
  • Aluminum fluoride has little effect on the coating-forming reactions.
  • a fluorine concentration of about 0.2 g/L is required in order to stabilize an aluminum concentration in the surface treat ⁇ ment bath of 0J g/L.
  • the optimal fluoride content for coating formation is from 0.010 to 5.0 g/L and preferably from 0J0 to 3.0 g/L, in each case calculated as fluorine.
  • a fluorine content below 0.010 g/L results in an inadequate reactivity and hence in inadequate coating formation.
  • levels in excess of 12 g/L result in an increased degree of etching that causes an undesirable unevenness in appearance, and such high levels also greatly complicate effluent treatment.
  • the accelerator functions in a surface treatment process according to the present invention to accelerate the rate of formation of the titanium coating on the metal surface and also to induce the formation of a highly corrosion-resistant and strongly paint-adherent coating.
  • the accelerator concentration in the sur ⁇ face treatment bath must be in the range from 0.010 to 2.0 g/L and is preferably in the range from 0.10 to 1.1 g/L. No acceleration of the film-forming reaction is usually observed at an accelerator concentration below 0.010 g/L.
  • the benefits from the accelerator do not further increase at accelerator levels in excess of 2.0 g/L, so that additions in excess of this level simply raise costs and are thus un ⁇ economical.
  • An especially preferred accelerator includes at least one selection from the group consisting of nitrous acid, nitric acid, tungstic acid, molybdic acid, per ⁇ manganic acid, all water-soluble salts of all of these acids, and water-soluble or- ganoperoxides.
  • the nitrous acid/nitrite source is not critical as long as it is water-soluble; however, the use of the sodium salt (i.e., NaN0 2 ) or the potassium salt (i.e., KNO 2 ) of nitrous acid is usually preferred because of their relatively low cost.
  • the nitric acid/nitrate source is also not critical, again as long as it is water-solu ⁇ ble; however, the use of the sodium salt (i.e., NaNO 3 ) or the potassium salt (i.e., KNO 3 ) of nitric acid (i.e., HNO 3 ) or of nitric acid itself is preferred because of their relatively low cost.
  • the tungstic acid/tungstate source is not critical as long as it is water-solu ⁇ ble; however, again the use of the sodium salt (i.e., Na 2 WO 4 ) or potassium salt (i.e., K 2 WO 4 ) of tungstic acid is preferred because of their relatively low cost.
  • the molybdic acid/molybdate source is not critical as long as it is water- soluble; however, the use of the sodium salt (i.e., Na 2 MoO 4 ) or ammonium salt (i.e., (NH 4 ) 6 Mo 7 O 24 ) of simple or condensed molybdic acid respectively is pre ⁇ ferred because of their relatively low cost.
  • Na 2 MoO 4 sodium salt
  • ammonium salt i.e., (NH 4 ) 6 Mo 7 O 24
  • permanganic acid/permanganate selection is not critical as long as it is water-soluble; however, the use of the sodium salt (i.e., NaMnO 4 ) or potas ⁇ sium salt (i.e., KMnO 4 ) of permanganic acid is preferred because of their relative- ly low cost.
  • NaMnO 4 sodium salt
  • KMnO 4 potas ⁇ sium salt
  • water-soluble organoperoxide are tert-butyl hydro ⁇ peroxide (i.e., (CH 3 ) 3 C-O-OH), tert-hexyl hydroperoxide (i.e., CH 3 CH 2 (CH 3 ) 2 C-O-OH), and di-tert-butyl peroxide (i.e., (CH 3 ) 3 C-O-O-C(CH 3 ) 3 ).
  • a working surface treatment bath according to the present invention is most conveniently prepared from a concentrate composition according to the present invention, and the pH of a working bath must be in the range from 1.0 to 4.5.
  • a pH below 1.0 causer an excessive etch of the metal surface by the treat ⁇ ment bath and thereby strongly impairs film formation. It becomes very proble ⁇ matic to obtain a highly corrosion-resistant and strongly paint-adherent coating at a pH in excess of 4.5.
  • the more preferred pH range is 1.3 to 3.0.
  • the pH of the surface treatment bath according to the present invention can be adjusted by adding an acid, e.g., nitric acid, sulfuric acid, hydrofluoric acid, or the like to Iower the pH, or by adding an alkali, e.g., sodium hydroxide, sodium carbonate, am ⁇ monium hydroxide, or the like to raise the pH.
  • the stability of the treatment bath may be substantially impaired by dissolution into the surface treat ⁇ ment bath of metal ions derived from the copper or manganese alloying compon ⁇ ent.
  • a difunctional organic acid or its alkali metal salt may be added as metal sequestering agent in order to chelate the aforementioned alloy ⁇ ing metal ions.
  • suitable organic acids are gluconic acid, heptogiu- conic acid, oxalic acid, tartaric acid, and ethylenediaminetetraacetic acid.
  • a working surface treatment bath according to the present invention may be brought into contact with the substrate to be treated by any convenient meth ⁇ od and normally is used as part of a process sequence including other steps.
  • a preferred generalized process sequence for example, is as follows: 1. Surface cleaning: degreasing with an acidic, alkaline, or solvent-based system
  • treatment temperature ambient temperature to 80 °C treatment time: 0.5 to 60 seconds treatment technique: spraying or dipping
  • a treatment process according to the present invention is performed by bringing a working surface treatment bath as described above into contact with a surface of aluminiferous metal at from room temperature to 80 °C and prefer ⁇ ably at from 35 °C to 70 °C, for a contact time that is at least, with increasing preference in the order given, 0.50, 1.0, or 2.0 seconds and independently pref ⁇ erably is not more than, with increasing preference in the order given, 120, 90, 60, 50, 40, 30, 20, 10, 8.0, 5.0, 3.0, or 2.5 seconds.
  • Treatment times below 0.5 second are associated with an insufficient reaction and hence may not yield the formation of a coating with good corrosion resistance and paint adherence.
  • the properties ofthe coating do not usually improve further at treatment times above 120 seconds and in some instances do not improve further even after treatment times of a few seconds, while any extended treatment time increases the process cost.
  • the coating formed in a process according to the invention preferably con ⁇ tains a mass per unit area of 3 to 50, or more preferably of 5 to 30, milligrams per square meter (hereinafter usually abbreviated as "mg/m 2 ”) of titanium atoms, which are measured as such by some method, such as X-ray fluorescence, that is independent of the chemical nature of the titanium atoms.
  • mg/m 2 milligrams per square meter
  • the aluminiferous metals that may be subjected to surface treatment by a process according to the present invention encompass both pure aluminum and aluminum alloys, for example, Al-Cu, Al-Mn, Al-Mg, Al-Si, and Al-Zn alloys.
  • the form and dimensions of the aluminiferous metal used in the invention pro ⁇ cess are not critical, and, for example, sheet and various molding shapes fall within the scope of the process.
  • JIS Japanese Industrial
  • the conversion-treated sheet was prepared by the execution of the following processes in the sequence 1 - 2 - 3 - 4 - 5 - 6.
  • Metal treatment according to the invention or a comparison thereto The components used in the surface treatment baths, their concentra ⁇ tions in these baths, and the conditions for the processes according to the inven ⁇ tion in Examples 1 to 9 and for Comparison Examples 1 to 5 are shown in tables below.
  • the surface treatment conditions for Comparison Examples 6 and 7 are noted separately.
  • An aqueouos solution of 40 % fluotitanic acid — a compound that is both a titanium containing substance(s) and a fluoride — was used in Examples 1 , 4, 7, and 9 and in Comparison Example 2 as the source of both of these necessary components of a bath according to the invention.
  • a small sprayer was used for the degreasing, water rinse, rinse with de-
  • the particular small sprayer used was designed to reproduce the same spraying conditions as in a continuous surface treatment line for the actual treatment of aluminum alloy coil.
  • Salt-spray testing according to JIS Z 2371 was used to evaluate the cor ⁇ rosion resistance.
  • the development of corrosion on the treated sheet was visu ⁇ ally evaluated after 150 hours of salt-spray testing, and the results were scored according to the following scale: 0 + + + : corroded area was less than 10 %;
  • + + corroded area was greater than or equal to 10 %, but less than 50 %; + corroded area was greater than or equal to 50 %, but less than 90 %; 5 x corroded area was greater than or equal to 90 %.
  • the surface of the conversion-treated aluminum-magnesium alloy sheet was painted with an epoxy-phenol paint for can lids to give a paint film thickness of 8 micrometers followed by baking for 3 minutes at 220 °C.
  • Polyamide film was o then inserted between two of these painted surfaces with hot-press bonding at 200 °C for 2 minutes.
  • the hot-press bonded composite was cut into 10 mm wide x 120 mm long strips, which were the test specimens.
  • a test specimen was peeled from the polyamide film using the T-peel test procedure, and the peel strength at this point was designated as the primary adherence.
  • a performance sufficient for practical applications was a peel strength of at least 7.0 kilograms-force (hereinafter usually abbreviated as "kgf')/10 mm width in the case of the primary adherence and a peel strength of at least 5.0 kgf/10 mm width in the case of the secondary adherence.
  • Example 7 The same treatment was run as in Example 1 , except for using a 2 % aqueous solution of a commercially available zirconium-based treatment agent, ALODINETM 4040 from Nihon Parkerizing Company, Limited, as the sur ⁇ face treatment bath in process step 3. This treatment bath was sprayed on the same aluminum-magnesium alloy sheet as described above for 30 seconds at 40 °C. The test results are reported in tables below.
  • Comparison Example 7 The same treatment was run as in Example 1 , except for using a 2 % aqueous solution of a commercially available zirconium-based treatment agent, ALODINETM 4040, from Nihon Parkerizing Company, Limited, as the treatment bath. This bath was sprayed on the same aluminum-magnesium alloy sheet as described above for 5 seconds at 40 °C. The test results are reported in tables below.

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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

Un revêtement de surface hautement résistant à la corrosion et adhérent à la peinture pour métaux alumineux peut être obtenue très rapidement, si désiré en moins d'une seconde, par mise en contact de la surface avec une composition traitante liquide, acide, aqueuse contenant comme solutés des proportions spécifiques d'ions phosphate, de matériaux contenant du titane, de fluorure et d'un accélérateur. De préférence, l'accélérateur est au moins une des substances suivantes: acide nitreux, acide nitrique, acide tungstique, acide molybdique, acide permanganique, les sels solubles dans l'eau de tous ces acides, et des organoperoxydes solubles dans l'eau.
EP96924286A 1995-06-30 1996-06-25 Compositions et procede pour traiter la surface de metaux alumineux Withdrawn EP0837954A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP166243/95 1995-06-30
JP16624395A JP3623015B2 (ja) 1995-06-30 1995-06-30 アルミニウム含有金属材料用表面処理液および表面処理方法
PCT/US1996/010683 WO1997002369A1 (fr) 1995-06-30 1996-06-25 Compositions et procede pour traiter la surface de metaux alumineux

Publications (2)

Publication Number Publication Date
EP0837954A1 true EP0837954A1 (fr) 1998-04-29
EP0837954A4 EP0837954A4 (fr) 1998-10-28

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EP96924286A Withdrawn EP0837954A4 (fr) 1995-06-30 1996-06-25 Compositions et procede pour traiter la surface de metaux alumineux

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EP (1) EP0837954A4 (fr)
JP (1) JP3623015B2 (fr)
AU (1) AU708280B2 (fr)
BR (1) BR9609331A (fr)
CA (1) CA2225757A1 (fr)
NZ (1) NZ312858A (fr)
WO (1) WO1997002369A1 (fr)

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JP5215043B2 (ja) * 2008-06-02 2013-06-19 日本パーカライジング株式会社 金属の表面処理用処理液及び表面処理方法
BR112012031325B1 (pt) 2010-06-09 2020-11-24 Chemetall Gmbh agente de tratamento de superfície de metal livre de cromo inorgânico
JP6553936B2 (ja) * 2015-04-28 2019-07-31 株式会社神戸製鋼所 包装容器用アルミニウム合金板の製造方法
CN105862020A (zh) * 2016-05-31 2016-08-17 无锡伊佩克科技有限公司 一种钢铁表面氟铁酸盐转化镀液及其制备方法

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JPH0920984A (ja) 1997-01-21
AU708280B2 (en) 1999-07-29
MX9710210A (es) 1998-03-29
EP0837954A4 (fr) 1998-10-28
AU6478196A (en) 1997-02-05
CA2225757A1 (fr) 1997-01-23
JP3623015B2 (ja) 2005-02-23
BR9609331A (pt) 1999-05-25
NZ312858A (en) 1999-11-29

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