EP2459770B1 - Procédé en plusieurs étapes pour le traitement des surfaces de métal avant une électrodéposition - Google Patents
Procédé en plusieurs étapes pour le traitement des surfaces de métal avant une électrodéposition Download PDFInfo
- Publication number
- EP2459770B1 EP2459770B1 EP10734099.4A EP10734099A EP2459770B1 EP 2459770 B1 EP2459770 B1 EP 2459770B1 EP 10734099 A EP10734099 A EP 10734099A EP 2459770 B1 EP2459770 B1 EP 2459770B1
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- EP
- European Patent Office
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- step iii
- treatment
- iii
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 65
- 229910052751 metal Inorganic materials 0.000 title claims description 35
- 239000002184 metal Substances 0.000 title claims description 35
- 238000004070 electrodeposition Methods 0.000 title description 7
- 239000000203 mixture Substances 0.000 claims description 44
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 238000000576 coating method Methods 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 10
- 150000002894 organic compounds Chemical class 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- 239000011701 zinc Substances 0.000 claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 9
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 8
- -1 fluoride ions Chemical class 0.000 claims description 7
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 150000002222 fluorine compounds Chemical class 0.000 claims description 5
- 125000001424 substituent group Chemical group 0.000 claims description 5
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 125000002947 alkylene group Chemical group 0.000 claims description 4
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 4
- 239000012964 benzotriazole Substances 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000003618 dip coating Methods 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 150000002484 inorganic compounds Chemical class 0.000 claims description 4
- 229910010272 inorganic material Inorganic materials 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 4
- 150000003254 radicals Chemical class 0.000 claims description 4
- 238000005238 degreasing Methods 0.000 claims description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 3
- 150000002736 metal compounds Chemical class 0.000 claims description 3
- 150000003852 triazoles Chemical class 0.000 claims description 3
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims description 2
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 claims description 2
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 claims description 2
- 125000003277 amino group Chemical group 0.000 claims 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims 1
- 229910001506 inorganic fluoride Inorganic materials 0.000 claims 1
- 230000007797 corrosion Effects 0.000 description 18
- 238000005260 corrosion Methods 0.000 description 18
- 239000003973 paint Substances 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 9
- 229910052726 zirconium Inorganic materials 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 239000010949 copper Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000032798 delamination Effects 0.000 description 4
- 125000000623 heterocyclic group Chemical group 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 239000010960 cold rolled steel Substances 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- 229910052735 hafnium Inorganic materials 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- VVJKKWFAADXIJK-UHFFFAOYSA-N Allylamine Chemical compound NCC=C VVJKKWFAADXIJK-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 239000008139 complexing agent Substances 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- CDAWCLOXVUBKRW-UHFFFAOYSA-N 2-aminophenol Chemical class NC1=CC=CC=C1O CDAWCLOXVUBKRW-UHFFFAOYSA-N 0.000 description 1
- 239000005725 8-Hydroxyquinoline Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical class [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 1
- YYVFXSYQSOZCOQ-UHFFFAOYSA-N Oxyquinoline sulfate Chemical group [O-]S([O-])(=O)=O.C1=C[NH+]=C2C(O)=CC=CC2=C1.C1=C[NH+]=C2C(O)=CC=CC2=C1 YYVFXSYQSOZCOQ-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 125000006615 aromatic heterocyclic group Chemical group 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 229910001451 bismuth ion Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229910001429 cobalt ion Inorganic materials 0.000 description 1
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- UYMKPFRHYYNDTL-UHFFFAOYSA-N ethenamine Chemical compound NC=C UYMKPFRHYYNDTL-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002221 fluorine Chemical class 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 229960003540 oxyquinoline Drugs 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical group C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910001432 tin ion Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 229910001456 vanadium ion Inorganic materials 0.000 description 1
Classifications
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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
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
Definitions
- the present invention relates to a multistage process for the corrosion-protective and adhesion-promoting treatment of metal surfaces comprising a first process step for passivating pretreatment with an acidic aqueous composition (A) comprising water-soluble compounds of Zr and / or Ti and fluoride ions a subsequent process step for aftertreatment with an aqueous Composition (B) containing) at least one organic compound having at least one aromatic heterocycle, wherein the aromatic heterocycle has at least one nitrogen atom.
- A acidic aqueous composition
- B containing
- at least one organic compound having at least one aromatic heterocycle wherein the aromatic heterocycle has at least one nitrogen atom.
- the invention further relates to a metal surface treated according to the method of the invention and the use of this treated metal surface for the subsequent coating with an organic binder system.
- Such aqueous compositions are suitable for the corrosion-protective pretreatment and have over the classical phosphating, for example in the manufacture of automobiles, the advantage that they can be used in processes which, on the one hand, involve fewer treatment stages and, on the other hand, during operation of a pretreatment line scarcely tend to form inorganic sludges which have to be laboriously worked up in the phosphating because of their heavy metal content ,
- the phosphating with respect to the adhesion to subsequently applied lacquer layers and corrosion resistance of the crystalline phosphate layer especially on galvanized surfaces still has significant advantages over an amorphous conversion layer based on mixed oxides and hydroxides of the metals Si, Ti, Zr and Hf.
- the WO 2008/133047 discloses aqueous treatment solutions for the conversion of metal surfaces containing fluorine complexes of the metals Ti, Zr and Hf and organic compounds selected from arylamines, aminopolysaccharides, amino-modified phenols and their derivatives, which may additionally contain ions of the elements Mg, Al, Zn, Cu and Co. Furthermore, the teaches WO 2008/133047 an aqueous post-rinse containing compounds selected from phosphoric acid, amino-phenols and organic phosphorus compounds. In the course of this aftertreatment, according to the invention, certain layer weights with respect to the metallic and organic fractions on the metal surface should be realized for adequate corrosion protection.
- the US 5401337 A discloses a two-step process for steel and aluminum comprising a pretreatment, which may be a chromium-free pretreatment, and a subsequent treatment with an aqueous composition which may contain triazoles in an alternative of the teachings disclosed therein.
- the aftertreatment is to effect a sealing of the metal surfaces, so that the disclosed two-stage process is particularly suitable for the surface treatment of Aluminuim.
- the US 2008/230394 A1 discloses a one-step process for anti-corrosive and paint adhesion-enhancing first coat followed by electrodeposition.
- the initial coating is carried out by contacting with acidic compositions containing compounds of the element Zr and fluorides, wherein additionally copper (II) ions and / or inter alia nitrogen-containing rust inhibitors, which in turn may be selected from heterocyclic compounds, may be included.
- copper (II) ions and / or inter alia nitrogen-containing rust inhibitors which in turn may be selected from heterocyclic compounds, may be included.
- the method for a sequential coating with a cationic electrodeposition paint is also applicable to metallic composite constructions.
- the object of the present invention is therefore to provide a process for the corrosion-protective and adhesion-promoting treatment of a composite construction which, in addition to surfaces of zinc has at least surfaces of iron before coating with an organic binder system in which the adhesion of the subsequently applied and cured organic Binder system to the metal substrate and the corrosion protection of the same over the prior art is significantly improved, wherein in a first treatment step is always a conversion treatment with an acidic aqueous agent, the water-soluble compounds of Zr, Ti and / or Si and fluoride ion-releasing, water-soluble inorganic Contains fluorine compounds.
- surfaces of iron, steel, zinc, galvanized and alloy-galvanized iron and Steel available, for example, under the common names Galfan®, Galvalume®, Galvannealed®.
- the surfaces treated in the process according to the invention are "bare" metal surfaces.
- bare metal surfaces are meant metal surfaces that do not yet carry a corrosion-protective coating.
- the method according to the invention is thus preferably the first or only treatment step which produces a corrosion protection layer, which in turn can serve as the basis for a subsequent coating. It is therefore preferably not an after-treatment of a previously generated corrosion protection layer such as a phosphate layer.
- the corrosion-protecting and adhesion-promoting effect of the passivating pretreatment (conversion treatment) and after-treatment is increased in the process according to the invention by the presence of the water-soluble inorganic compounds which release copper ions.
- the positive effect of the aftertreatment in step iii) of the process according to the invention on the paint adhesion and the corrosion protection of subsequently applied on the metal surface organic coatings in process according to the invention is significant, since the composition (A) in the passivating pretreatment solution in step ii) water-soluble inorganic compounds contains, which release copper (II) ions.
- the use of the preferred method according to the invention is particularly advantageous when treating metal composite structures which, in addition to surfaces of zinc and the surfaces of iron, in particular also have at least surfaces of aluminum.
- an organic compound having at least one aromatic nitrogen heterocycle contained in the aqueous composition (B) of the post-treatment in step iii) preference is given to using those heterocycles which are in the ⁇ - and / or ⁇ -position a nitrogen heteroatom of the respective aromatic heterocycle are substituted, wherein the substituents in ⁇ -position and / or ⁇ -position are selected from -OR, -NRH, -COOX, -CH 2 OR, -CH 2 NRH, -CH 2 - COOX, -C 2 H 4 OR, wherein the radical R is selected in each case from hydrogen, alkyl or alkylene groups having not more than 4 carbon atoms and the radical X is selected in each case from hydrogen, alkali metals, alkyl or alkylene groups not more than 4 carbon atoms.
- the aromatic heterocycles additionally have a chelating effect on polyvalent metal cations, which are incorporated in the passivating pretreatment stage either from the metal substrate by pickling processes in the conversion or passive layer or contained in the pretreatment stage as such and with the on the substrate adhering wet film in the aftertreatment.
- Preferred aromatic heterocycles in the composition (B) of process step iii) are selected in the process according to the invention from triazole, benzotriazole, imidazole, quinoline and / or indole, particularly preferably quinoline.
- a corresponding substitution of this selection of heterocycles in ⁇ - and / or ⁇ -position to a nitrogen heteroatom with the abovementioned substituents is likewise advantageous for the effectiveness of the post-treatment stage iii) for improving the paint adhesion and the corrosion protection of subsequently applied organic coatings.
- the content of organic compounds having at least one aromatic heterocycle containing at least one nitrogen atom in the aqueous composition (B) of process step iii) is preferably at least 10 ppm, particularly preferably at least 100 ppm, but preferably does not exceed 5000 ppm, more preferably not 1000 ppm calculated as the mass fraction of the aromatic heterocycles containing at least one nitrogen atom on the composition (B).
- the mass fraction of aromatic heterocycles in the composition (B) corresponds exclusively to the proportion by mass which is predetermined by the aromatic heterocyclic structural unit without substituents.
- chelating complexing agents whose chelating substituents are selected from amino, carboxyl and / or hydroxyl groups may additionally be present in composition (B) of the after-treatment in step iii).
- Suitable chelating agents for the purposes of the present invention are in particular ⁇ -, ⁇ -, and ⁇ -amino acids.
- the additional chelating agents incorporated into the composition (B) promote the complexation of polyvalent metal cations of the slightly water-soluble metal salts contained in the conversion and passive layers, respectively. By this measure, the corrosive delamination of subsequently applied organic coatings can be further minimized.
- the proportion of chelating complexing agents in the composition (B) in process step iii) for this purpose is preferably at least 10 ppm, more preferably at least 50 ppm, but preferably not more than 1000 ppm.
- the metal surfaces to be treated are preferably freed of oil and fat residues in a purification step in step i) of the process according to the invention. At the same time, this produces a reproducible metal surface which ensures a uniform layer quality according to the process steps consisting of conversion treatment in step ii) and after-treatment in step iii). This is preferably an alkaline cleaning with commercially available products known to the person skilled in the art.
- the application of the aqueous compositions (A, B) in process steps ii) and iii) can be carried out, for example, by immersion in the treatment solution ("immersion process") or by spraying ("spraying process") with the respective composition.
- the temperature of the compositions is preferably in the range of 15 to 60 ° C, in particular in the range of 25 to 50 ° C.
- the necessary duration of treatment depends on the respective process step and the type of application.
- contact times in step ii) with the chromium-free composition (A) of at least 30 seconds, in particular at least 1 minute, are preferred.
- the contact time in step ii) of the process according to the invention should preferably not exceed 10 minutes, more preferably 5 minutes.
- the contact times in the Step iii) with the aqueous compositions (B) correspond to those of a conventional sink and are preferably in the range of a few seconds to minutes.
- a rinsing step may be carried out, more preferably water, in particular with deionized water.
- process according to the invention is particularly suitable for improving paint adhesion to subsequently applied and cured binder systems in the dipping process. Therefore, processes according to the invention are distinguished by the fact that process step iii) with intermediate rinsing step, but without drying step, is followed by electrodeposition or electroless electrophoretic dip coating.
- immersion paint refers to those aqueous dispersions of organic polymers which are applied to the metal surface in the immersion process both without external current, ie self-deposited, and those in which coating with the paint from the aqueous phase takes place by applying an external voltage source.
- the metal surface is dried after contact with the compositions (A, B) and before coating with a dip paint, for example a cathodic electrodeposition paint.
- a dip paint for example a cathodic electrodeposition paint.
- unintentional drying may occur during system downtime when the treated metal surface, such as an automobile body or part thereof, is in the air between the bath containing the agent of the invention and the dip bath.
- this unintentional drying is harmless.
- the present invention comprises a composite construction which, in addition to surfaces of zinc, also has at least surfaces of iron or, preferably, at least also surfaces of iron and aluminum which has been treated according to the method described above, the metallic surfaces of the composite construction comprising a titanium and / or Zirconium coating of preferably not less than 20 mg / m 2 and preferably not more than 150 mg / m 2 , and wherein preferably a copper coating of 100 mg / m 2 , more preferably 80 mg / m 2 not will exceed, but preferably deposited at least 10 mg / m 2 of copper deposited.
- composite structures treated in accordance with the underlying invention are used in the production of semi-finished products, in automotive production in body construction, in shipbuilding, in construction and in the field of architecture, and for the production of white goods and electronic housings.
- the correspondingly treated metal sheets were dried after the last rinsing step with compressed air and electrocoated with the following cathodic dip coating: Cathoguard 500 (Fa BASF, KTL layer thickness: 20 microns non-destructively determined with commercially available coating thickness gauge). The paint was then baked at 175 ° C for 25 min in the oven.
- compositions containing copper (II) since in this case corrosion on steel is already known the pre-treatment is strongly inhibited and then the post-treatment with the composition (B) makes the inhibition of the zinc surfaces, without resulting in a deterioration of the corrosion properties of the passivation on the iron surfaces.
Claims (9)
- Procédé de traitement anticorrosion d'une structure composite comprenant, outre des surfaces en zinc, également au moins des surfaces en fer, ledit procédé comportant au moins les étapes de procédé suivantes effectuées successivement :i) le cas échéant, le nettoyage et le dégraissage de la surface métallique ;ii) le prétraitement de passivation de la surface métallique par mise en contact avec une composition aqueuse acide (A) contenanta) des composés inorganiques hydrosolubles de Zr et/ou de Ti,b) des composés fluorés inorganiques hydrosolubles qui libèrent des ions fluorure,c) des composés métalliques inorganiques hydrosolubles qui libèrent des ions cuivriques ;iii) le traitement ultérieur de la surface métallique prétraitée par mise en contact avec une composition aqueuse (B),l'étape de procédé iii) étant suivie d'un processus de revêtement autodéposé par immersion ou d'un processus de revêtement électrophorétique par immersion avec interposition d'une étape de rinçage, mais sans étape de séchage,
caractérisé en ce que
la composition aqueuse (B) de l'étape de procédé iii) contient au moins un composé organique possédant au moins un hétérocycle aromatique, ledit hétérocycle aromatique comportant au moins un atome d'azote. - Procédé selon la revendication 1, caractérisé en ce que l'hétérocycle aromatique azoté respectif des composés organiques de la composition (B) de l'étape de procédé iii) est substitué en position α et/ou β à un hétéroatome d'azote de l'hétérocycle aromatique respectif, les substituants en position α et/ou β étant choisis parmi -OR, -NRH, -COOX, CH2OR, -CH2NRH,-CH2-COOX, -C2H4OR, le radical R étant à chaque fois choisi parmi l'hydrogène, des groupes alkyle ou alkylène ayant au plus 4 atomes de carbone et le radical X étant choisi à chaque fois parmi l'hydrogène, les métaux alcalins, les groupes alkyle ou alkylène ayant au plus 4 atomes de carbone.
- Procédé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'hétérocycle aromatique respectif des composés organiques de la composition (B) de l'étape de procédé iii) est choisi parmi le triazole, le benzotriazole, l'imidazole, la quinoléine, et/ou l'indole.
- Procédé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la teneur en composés organiques ayant au moins un hétérocycle aromatique azoté dans la composition aqueuse (B) de l'étape de procédé iii) est d'au moins 10 ppm, de préférence 100 ppm, mais n'est pas supérieure à 5000 ppm déterminée en tant que fraction massique des hétérocycles aromatiques azotés de la composition (B).
- Procédé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la composition (B) de l'étape de procédé iii) contient en outre des agents complexants chélatants, la constante de complexation log KB du complexe correspondant comportant des ions de zinc étant supérieure à 10, de préférence supérieure à 14.
- Procédé selon la revendication 6, caractérisé en ce que les agents complexants chélatants de la composition (B) de l'étape de procédé iii) contiennent à la fois des groupes amine et des groupes carboxyle.
- Procédé selon l'une ou l'autre des revendications précédentes 6 et 7, caractérisé en ce que la proportion d'agents complexants chélatants dans la composition (B) de l'étape de procédé iii) est d'au moins 10 ppm, de préférence d'au moins 50 ppm, mais n'est pas supérieure à 1000 ppm.
- Procédé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'une étape de rinçage est effectuée avant les étapes de procédé ii) et/ou iii).
- Procédé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que les structures composites comportent, outre des surfaces en zinc et en fer, également au moins des surfaces en aluminium.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009028025A DE102009028025A1 (de) | 2009-07-27 | 2009-07-27 | Mehrstufiges Verfahren zur Behandlung von Metalloberflächen vor einer Tauchlackierung |
PCT/EP2010/060053 WO2011012443A1 (fr) | 2009-07-27 | 2010-07-13 | Procédé en plusieurs étapes pour le traitement de surfaces métalliques avant revêtement par immersion |
Publications (2)
Publication Number | Publication Date |
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EP2459770A1 EP2459770A1 (fr) | 2012-06-06 |
EP2459770B1 true EP2459770B1 (fr) | 2015-05-13 |
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EP10734099.4A Active EP2459770B1 (fr) | 2009-07-27 | 2010-07-13 | Procédé en plusieurs étapes pour le traitement des surfaces de métal avant une électrodéposition |
Country Status (10)
Country | Link |
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US (1) | US8557096B2 (fr) |
EP (1) | EP2459770B1 (fr) |
JP (1) | JP5684255B2 (fr) |
CN (1) | CN102482783A (fr) |
AU (1) | AU2010278178B2 (fr) |
BR (1) | BR112012001698A2 (fr) |
DE (1) | DE102009028025A1 (fr) |
ES (1) | ES2544980T3 (fr) |
RU (1) | RU2012106611A (fr) |
WO (1) | WO2011012443A1 (fr) |
Cited By (1)
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US10125424B2 (en) | 2012-08-29 | 2018-11-13 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates |
Families Citing this family (10)
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DE102009029334A1 (de) * | 2009-09-10 | 2011-03-24 | Henkel Ag & Co. Kgaa | Zweistufiges Verfahren zur korrosionsschützenden Behandlung von Metalloberflächen |
US9417018B2 (en) | 2012-03-15 | 2016-08-16 | Carrier Corporation | Multi-layer protective coating for an aluminum heat exchanger |
CA2883186C (fr) | 2012-08-29 | 2017-12-05 | Ppg Industries Ohio, Inc. | Compositions de pretraitement du zirconium qui contiennent du lithium, procedes associes permettant de traiter des substrats metalliques et substrats metalliques recouverts associes |
EP2868719A1 (fr) * | 2013-10-31 | 2015-05-06 | PPG Coatings Europe B.V. | Réservoir ou tuyau ayant un système de revêtement |
US9644118B2 (en) * | 2015-03-03 | 2017-05-09 | Dow Global Technologies Llc | Method of releasably attaching a semiconductor substrate to a carrier |
DE102015206812A1 (de) | 2015-04-15 | 2016-10-20 | Henkel Ag & Co. Kgaa | Polymerhaltige Vorspüle vor einer Konversionsbehandlung |
DE102015209909A1 (de) | 2015-05-29 | 2016-12-01 | Henkel Ag & Co. Kgaa | Konditionierung vor einer Konversionsbehandlung von Metalloberflächen |
DE102015209910A1 (de) | 2015-05-29 | 2016-12-01 | Henkel Ag & Co. Kgaa | Vorspüle enthaltend ein quartäres Amin zur Konditionierung vor einer Konversionsbehandlung |
MX2019001874A (es) | 2016-08-24 | 2019-06-06 | Ppg Ind Ohio Inc | Composicion limpiadora que contiene hierro. |
CN109137049B (zh) * | 2018-09-06 | 2020-10-09 | 广东耀银山铝业有限公司 | 一种钝化前处理的易极电泳铝型材生产工艺 |
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WO2007065645A1 (fr) | 2005-12-09 | 2007-06-14 | Henkel Ag & Co. Kgaa | Procede humide sur humide et solution acide exempte de chrome pour traitement protecteur contre la corrosion de surfaces en acier |
US20080230394A1 (en) | 2006-12-20 | 2008-09-25 | Toshio Inbe | Metal surface treatment liquid for cation electrodeposition coating |
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US4370177A (en) * | 1980-07-03 | 1983-01-25 | Amchem Products, Inc. | Coating solution for metal surfaces |
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DE10310972A1 (de) * | 2003-03-13 | 2004-09-23 | Basf Ag | Stickstoffhaltige Polymere für die Metalloberflächenbehandlung |
ES2411429T3 (es) * | 2005-02-15 | 2013-07-05 | The United States Of America As Represented By The Secretary Of The Navy | Composición y procedimiento para preparar revestimientos protectores sobre sustratos metálicos |
JP5201916B2 (ja) * | 2006-09-08 | 2013-06-05 | 日本ペイント株式会社 | カチオン電着塗装前処理として行われる金属表面処理方法、これに用いられる金属表面処理組成物、電着塗装の付きまわり性に優れた金属材料、及び金属基材の塗装方法 |
JP2008088553A (ja) * | 2006-09-08 | 2008-04-17 | Nippon Paint Co Ltd | 金属基材の表面処理方法、当該表面処理方法により処理されてなる金属材料、及び当該金属材料の塗装方法 |
JP5571277B2 (ja) | 2007-04-13 | 2014-08-13 | 日本パーカライジング株式会社 | 亜鉛系金属材料用表面処理液および亜鉛系金属材料の表面処理方法 |
-
2009
- 2009-07-27 DE DE102009028025A patent/DE102009028025A1/de not_active Ceased
-
2010
- 2010-07-13 EP EP10734099.4A patent/EP2459770B1/fr active Active
- 2010-07-13 ES ES10734099.4T patent/ES2544980T3/es active Active
- 2010-07-13 BR BR112012001698A patent/BR112012001698A2/pt not_active Application Discontinuation
- 2010-07-13 CN CN2010800326538A patent/CN102482783A/zh active Pending
- 2010-07-13 JP JP2012522084A patent/JP5684255B2/ja not_active Expired - Fee Related
- 2010-07-13 RU RU2012106611/02A patent/RU2012106611A/ru unknown
- 2010-07-13 WO PCT/EP2010/060053 patent/WO2011012443A1/fr active Application Filing
- 2010-07-13 AU AU2010278178A patent/AU2010278178B2/en not_active Ceased
-
2012
- 2012-01-26 US US13/358,873 patent/US8557096B2/en active Active
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EP1571237A1 (fr) | 2002-12-13 | 2005-09-07 | Nihon Parkerizing Co., Ltd. | Fluide de traitement pour traitement de surface de metal et procede de traitement de surface |
WO2007065645A1 (fr) | 2005-12-09 | 2007-06-14 | Henkel Ag & Co. Kgaa | Procede humide sur humide et solution acide exempte de chrome pour traitement protecteur contre la corrosion de surfaces en acier |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10125424B2 (en) | 2012-08-29 | 2018-11-13 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates |
US10920324B2 (en) | 2012-08-29 | 2021-02-16 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates |
Also Published As
Publication number | Publication date |
---|---|
US20120186986A1 (en) | 2012-07-26 |
RU2012106611A (ru) | 2013-09-10 |
DE102009028025A1 (de) | 2011-02-03 |
JP2013500393A (ja) | 2013-01-07 |
JP5684255B2 (ja) | 2015-03-11 |
EP2459770A1 (fr) | 2012-06-06 |
WO2011012443A1 (fr) | 2011-02-03 |
CN102482783A (zh) | 2012-05-30 |
ES2544980T3 (es) | 2015-09-07 |
BR112012001698A2 (pt) | 2016-04-12 |
US8557096B2 (en) | 2013-10-15 |
AU2010278178A1 (en) | 2012-02-23 |
AU2010278178B2 (en) | 2015-12-10 |
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