EP2459770A1 - Mehrstufiges verfahren zur behandlung von metalloberflächen vor einer tauchlackierung - Google Patents
Mehrstufiges verfahren zur behandlung von metalloberflächen vor einer tauchlackierungInfo
- Publication number
- EP2459770A1 EP2459770A1 EP10734099A EP10734099A EP2459770A1 EP 2459770 A1 EP2459770 A1 EP 2459770A1 EP 10734099 A EP10734099 A EP 10734099A EP 10734099 A EP10734099 A EP 10734099A EP 2459770 A1 EP2459770 A1 EP 2459770A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- composition
- ppm
- step iii
- iii
- metal
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 70
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 44
- 239000002184 metal Substances 0.000 title claims abstract description 44
- 238000010422 painting Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 claims abstract description 48
- 238000011282 treatment Methods 0.000 claims abstract description 31
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 150000002894 organic compounds Chemical group 0.000 claims abstract description 11
- 125000004433 nitrogen atom Chemical group N* 0.000 claims abstract description 9
- -1 fluoride ions Chemical class 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 11
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 6
- 150000001768 cations Chemical class 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 5
- 239000008139 complexing agent Substances 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
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 238000003618 dip coating Methods 0.000 claims description 4
- 238000004070 electrodeposition Methods 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 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
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 238000005238 degreasing Methods 0.000 claims description 3
- 150000002222 fluorine compounds Chemical class 0.000 claims description 3
- 150000002736 metal compounds Chemical class 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 239000011135 tin Substances 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
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 2
- 239000012964 benzotriazole Substances 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
- 150000003852 triazoles Chemical class 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims 1
- 230000009918 complex formation Effects 0.000 claims 1
- 238000000151 deposition Methods 0.000 claims 1
- 150000003254 radicals Chemical class 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 12
- 239000011248 coating agent Substances 0.000 abstract description 9
- 239000011230 binding agent Substances 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 125000006615 aromatic heterocyclic group Chemical group 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 17
- 238000005260 corrosion Methods 0.000 description 17
- 239000003973 paint Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 229910052726 zirconium Inorganic materials 0.000 description 8
- 239000000243 solution Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 229910021645 metal ion Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000010960 cold rolled steel Substances 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 230000032798 delamination Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052735 hafnium Inorganic materials 0.000 description 3
- 125000000623 heterocyclic group Chemical group 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 150000002500 ions Chemical class 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
- 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
- 229910001335 Galvanized steel Inorganic materials 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
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 230000005764 inhibitory process Effects 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
- 229910052710 silicon Inorganic materials 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
- 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
- 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
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000004982 aromatic amines Chemical class 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
- 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
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 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
- 150000002221 fluorine Chemical class 0.000 description 1
- 229910001385 heavy metal Inorganic materials 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
- 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
- 239000007769 metal material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000011328 necessary treatment Methods 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 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
- 229920000642 polymer Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification 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
- 239000010802 sludge Substances 0.000 description 1
- 238000003860 storage 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
-
- 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 multi-stage process for the corrosion-protective and adhesion-promoting treatment of metal surfaces comprising a first process step for passivating pretreatment with an acidic aqueous
- 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.
- aqueous compositions are suitable for anticorrosive pretreatment and have the advantage over classic phosphating, for example in the manufacture of automobiles, that they can be used in processes which, on the one hand, comprise fewer treatment stages and, on the other hand, during the operation of a pretreatment line, are less likely to form inorganic sludge tend that must be worked up consuming in the phosphating due to their heavy metal content.
- the phosphating has in terms of adhesion to subsequently applied paint layers and in terms of
- 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 additionally contain ions of the elements Mg, Al, Zn, Cu and Co may contain. Furthermore, WO 2008/133047 teaches an aqueous 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 object of the present invention is now to provide a method for
- 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.
- the paint adhesion and the corrosion protection which is mediated by a conversion treatment of metallic surfaces, in a process in the at least the following process steps are carried out successively, be significantly improved:
- the aqueous composition (B) in process step iii) contains at least one organic compound having at least one aromatic heterocycle, wherein the aromatic heterocycle has at least one nitrogen atom.
- the metallic surface is considered to be surfaces of iron, steel, zinc, galvanized and alloy-galvanized iron and steel, which are obtainable, for example, under the customary names Galfan®, Galvalume®, Galvannealed®.
- the metallic surfaces which can be treated in a corrosion-protective and adhesion-promoting manner in the process according to the invention also include aluminum, magnesium and zinc as well as the respective alloys with one
- the metallic surface treated in the method according to the invention is a "bare" metal surface.
- Metal surfaces are understood as metal surfaces that are not yet
- 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 one
- the use of the method according to the invention is particularly advantageous when metallic components are treated of aluminum, since the Filiform corrosion is significantly reduced by the post-treatment step.
- the anti-corrosive and adhesion-promoting effect of the passivating is particularly advantageous when metallic components are treated of aluminum, since the Filiform corrosion is significantly reduced by the post-treatment step.
- Pretreatment (conversion treatment) and aftertreatment may occur in the conversion treatment
- Step ii) which release metal ions selected from copper, nickel, cobalt, tin and / or bismuth, can be increased.
- the expert can
- step iii) of the process according to the invention on the paint adhesion and the corrosion protection of subsequently applied organic coatings on the metal surface is particularly significant in the inventive process in which the composition (A) in the passivating
- Pretreatment solution in step ii) contains water-soluble inorganic compounds that release copper (II) ions.
- Composition (A) in step ii) water-soluble inorganic metal compounds containing metal ions selected from ions of the elements copper, nickel, cobalt, tin and / or bismuth, in particular copper (II) ions, is particularly advantageous when metallic Composite structures are treated, in addition to surfaces of zinc at least surfaces of iron or in particular at least also have surfaces of iron and aluminum.
- an organic compound having at least one aromatic nitrogen heterocycle contained in the aqueous composition (B) of the post-treatment in step iii) it is preferred to use those heterocycles which are substituted in ⁇ - and / or ⁇ -position to form a nitrogen heteroatom of the respective aromatic heterocycle, the substituents in the ⁇ -position and / or ⁇ -position being selected from -OR, -NRH, -COOX, -CH 2 OR, -CH 2 NRH, -CH 2 -COOX, -C 2 H 4 OR, wherein each R is selected from hydrogen, alkyl or alkylene groups with not more than
- Alkali metals, alkyl or alkylene groups having not more than 4 carbon atoms are examples of Alkali metals, alkyl or alkylene groups having not more than 4 carbon atoms.
- the aromatic heterocycles additionally have a chelating effect on polyvalent metal cations which in the passivating pretreatment stage either from the metal substrate by pickling processes in the
- Conversion or passive layer are incorporated or contained as such in the pretreatment stage and with the adhering to the substrate wet film in the
- 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 ß-position to a nitrogen heteroatom with the abovementioned substituents is also advantageous for the effectiveness of the post-treatment stage iii) for the improvement of
- 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).
- chelating agents are suitable for the purposes of the present invention
- 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.
- 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.
- aqueous compositions (A, B) in process steps ii) and iii) can be carried out, for example, by immersion in the treatment solution ("dip process") or by spraying ("spraying process") with the respective composition.
- the temperature of the compositions is preferably in the range of 15 to 60 0 C, in particular in the range of 25 to 50 0 C.
- the necessary treatment time is dependent on the respective process step and the
- 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 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.
- processes according to the invention are particularly suitable for improving paint adhesion to subsequently applied and cured binder systems in the dipping process. Therefore, processes according to the invention are preferably distinguished by the fact that process step iii) with or without intervening rinsing and / or drying step, particularly preferably with rinsing step, particularly preferably with rinsing step but without drying step, is followed by electrocoating 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. However, this unintentional drying is harmless.
- the present invention comprises a metallic substrate treated according to the method described above, wherein the surface of the metallic substrate has a titanium and / or zirconium deposit of preferably not less than 20 mg / m 2 and preferably not more than 150 mg / m 2 has.
- a titanium and / or zirconium deposit of preferably not less than 20 mg / m 2 and preferably not more than 150 mg / m 2 has.
- metallic substrates are preferred in which the layer support based on copper does not exceed 100 mg / m 2 , preferably 80 mg / m 2 , but at least 10 mg / m 2 of copper deposited.
- Multilayer system is encompassed by the present invention.
- the metallic materials, components and composite structures treated in accordance with the underlying invention can be found in the manufacture of semi-finished products, in automotive production in vehicle body construction, in shipbuilding, in the automotive industry
- metal sheets of cold rolled steel (CRS), hot dip galvanized steel (HDG) and aluminum (6014 GB) are treated according to the following process steps. i) Cleaning and degreasing at 55 0 C for 5 minutes with an alkaline cleaner of
- Fluoride content (with Grano Toner ® 38, Henkel) of 100 ppm and optionally 20 ppm Cu, at 30 0 C for 90 seconds
- Nitrogen-containing aromatic heterocycle at 30 0 C for 90 seconds
- Process steps i) -vi) are carried out sequentially.
- the passivating treatment of metal sheets which omits the method step v) corresponds to a conventional pretreatment known in the prior art and therefore serves as a comparison treatment for the proof of the invention contribution.
- compositions of pretreatment and aftertreatment are listed.
- Presence of copper (II) ions in the composition (A) of the pretreatment already causes a significant inhibition of corrosion, so that an additional effect at Storage of the test sheets in the salt spray and alternating climate test for the specified period can not be determined.
- Salt spray test 1000 h alternating climate test, 70 days
- composition (A) of treated hot-dip galvanized steel sheets is markedly reduced by the aftertreatment with the composition (B) containing aromatic heterocycles with nitrogen atom (Table 3: compare B2, B4 and B6 with VB2).
- Mean thread length in mm mean thread length in mm
- Composite metal structures which in addition to surfaces of zinc also have surfaces of iron or iron and aluminum, using copper (II) -containing compositions (A) is preferred, since in this case the corrosion on steel is strongly inhibited already in the pretreatment and then the aftertreatment with the composition (B) provides the inhibition of the zinc surfaces, without a deterioration of the corrosion properties of the passivation on the
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- General Chemical & Material Sciences (AREA)
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Abstract
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102009028025A DE102009028025A1 (de) | 2009-07-27 | 2009-07-27 | Mehrstufiges Verfahren zur Behandlung von Metalloberflächen vor einer Tauchlackierung |
PCT/EP2010/060053 WO2011012443A1 (de) | 2009-07-27 | 2010-07-13 | Mehrstufiges verfahren zur behandlung von metalloberflächen vor einer tauchlackierung |
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EP2459770A1 true EP2459770A1 (de) | 2012-06-06 |
EP2459770B1 EP2459770B1 (de) | 2015-05-13 |
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EP10734099.4A Active EP2459770B1 (de) | 2009-07-27 | 2010-07-13 | Mehrstufiges verfahren zur behandlung von metalloberflächen vor einer tauchlackierung |
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US (1) | US8557096B2 (de) |
EP (1) | EP2459770B1 (de) |
JP (1) | JP5684255B2 (de) |
CN (1) | CN102482783A (de) |
AU (1) | AU2010278178B2 (de) |
BR (1) | BR112012001698A2 (de) |
DE (1) | DE102009028025A1 (de) |
ES (1) | ES2544980T3 (de) |
RU (1) | RU2012106611A (de) |
WO (1) | WO2011012443A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10400337B2 (en) | 2012-08-29 | 2019-09-03 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing lithium, associated methods for treating metal substrates, and related coated metal substrates |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102009029334A1 (de) * | 2009-09-10 | 2011-03-24 | Henkel Ag & Co. Kgaa | Zweistufiges Verfahren zur korrosionsschützenden Behandlung von Metalloberflächen |
EP2825691B1 (de) * | 2012-03-15 | 2021-05-26 | Carrier Corporation | Mehrschichtige schutzschicht für einen aluminiumwärmetauscher |
IN2015DN01537A (de) | 2012-08-29 | 2015-07-03 | Ppg Ind Ohio Inc | |
EP2868719A1 (de) * | 2013-10-31 | 2015-05-06 | PPG Coatings Europe B.V. | Tank oder Leitung mit Beschichtungssystem |
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 |
DE102015209910A1 (de) | 2015-05-29 | 2016-12-01 | Henkel Ag & Co. Kgaa | Vorspüle enthaltend ein quartäres Amin zur Konditionierung vor einer Konversionsbehandlung |
DE102015209909A1 (de) | 2015-05-29 | 2016-12-01 | Henkel Ag & Co. Kgaa | Konditionierung vor einer Konversionsbehandlung von Metalloberflächen |
WO2018039462A1 (en) | 2016-08-24 | 2018-03-01 | Ppg Industries Ohio, Inc. | Alkaline composition for treating metal substartes |
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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US3964936A (en) | 1974-01-02 | 1976-06-22 | Amchem Products, Inc. | Coating solution for metal surfaces |
US4370177A (en) * | 1980-07-03 | 1983-01-25 | Amchem Products, Inc. | Coating solution for metal surfaces |
US5401337A (en) * | 1991-04-15 | 1995-03-28 | Henkel Corporation | Secondary protective treatments for metal surfaces |
US5226976A (en) * | 1991-04-15 | 1993-07-13 | Henkel Corporation | Metal treatment |
JP4205939B2 (ja) | 2002-12-13 | 2009-01-07 | 日本パーカライジング株式会社 | 金属の表面処理方法 |
DE10310972A1 (de) * | 2003-03-13 | 2004-09-23 | Basf Ag | Stickstoffhaltige Polymere für die Metalloberflächenbehandlung |
EP1863952B1 (de) * | 2005-02-15 | 2013-03-06 | The United States of America as represented by The Secretary of The Navy | Zusammensetzung und verfahren zur herstellung von schutzüberzügen auf metallsubstraten |
DE102005059314B4 (de) | 2005-12-09 | 2018-11-22 | Henkel Ag & Co. Kgaa | Saure, chromfreie wässrige Lösung, deren Konzentrat, und ein Verfahren zur Korrosionsschutzbehandlung von Metalloberflächen |
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 |
JP4276689B2 (ja) * | 2006-12-20 | 2009-06-10 | 日本ペイント株式会社 | カチオン電着塗装方法、及びカチオン電着塗装された金属基材 |
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 |
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2009
- 2009-07-27 DE DE102009028025A patent/DE102009028025A1/de not_active Ceased
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2010
- 2010-07-13 WO PCT/EP2010/060053 patent/WO2011012443A1/de active Application Filing
- 2010-07-13 ES ES10734099.4T patent/ES2544980T3/es active Active
- 2010-07-13 RU RU2012106611/02A patent/RU2012106611A/ru unknown
- 2010-07-13 CN CN2010800326538A patent/CN102482783A/zh active Pending
- 2010-07-13 BR BR112012001698A patent/BR112012001698A2/pt not_active Application Discontinuation
- 2010-07-13 AU AU2010278178A patent/AU2010278178B2/en not_active Ceased
- 2010-07-13 JP JP2012522084A patent/JP5684255B2/ja not_active Expired - Fee Related
- 2010-07-13 EP EP10734099.4A patent/EP2459770B1/de active Active
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10400337B2 (en) | 2012-08-29 | 2019-09-03 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing lithium, associated methods for treating metal substrates, and related coated metal substrates |
Also Published As
Publication number | Publication date |
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AU2010278178B2 (en) | 2015-12-10 |
CN102482783A (zh) | 2012-05-30 |
US20120186986A1 (en) | 2012-07-26 |
DE102009028025A1 (de) | 2011-02-03 |
US8557096B2 (en) | 2013-10-15 |
JP5684255B2 (ja) | 2015-03-11 |
ES2544980T3 (es) | 2015-09-07 |
RU2012106611A (ru) | 2013-09-10 |
JP2013500393A (ja) | 2013-01-07 |
EP2459770B1 (de) | 2015-05-13 |
BR112012001698A2 (pt) | 2016-04-12 |
AU2010278178A1 (en) | 2012-02-23 |
WO2011012443A1 (de) | 2011-02-03 |
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