EP0533823B1 - Composition liquide et procede de traitement de boites en aluminium ou en fer blanc destines a ameliorer la resistance a la corrosion et a reduire le coefficient de friction - Google Patents

Composition liquide et procede de traitement de boites en aluminium ou en fer blanc destines a ameliorer la resistance a la corrosion et a reduire le coefficient de friction Download PDF

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EP0533823B1
EP0533823B1 EP91912131A EP91912131A EP0533823B1 EP 0533823 B1 EP0533823 B1 EP 0533823B1 EP 91912131 A EP91912131 A EP 91912131A EP 91912131 A EP91912131 A EP 91912131A EP 0533823 B1 EP0533823 B1 EP 0533823B1
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Prior art keywords
liquid composition
water
tin
aluminum
soluble resin
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EP91912131A
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German (de)
English (en)
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EP0533823A1 (fr
Inventor
Shigeo Tanaka
Tomoyuki Aoki
Masayuki Yoshida
Yasuo Iino
Shinichiro Nihon Parkerizing Asai
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Henkel Corp
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Henkel Corp
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Priority claimed from JP16044390A external-priority patent/JPH0450272A/ja
Priority claimed from JP17927190A external-priority patent/JPH0466671A/ja
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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
    • C23C22/07—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 phosphates
    • C23C22/23—Condensed phosphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/68—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 solutions with pH between 6 and 8

Definitions

  • the present invention relates to a novel liquid composition for treating the surface of tin-plated steel and/or aluminum and alloys that are predominantly aluminum (both the pure metal and alloys being denoted hereinafter by the word "aluminum” unless the context requires otherwise), particularly the surfaces of drawn-and-ironed (hereinafter "DI") cans made from these materials.
  • the composition imparts an excellent corrosion resistance and paint adhesiveness to the surface of such a can after its formation by the drawing and ironing of metal sheet but before its painting or printing.
  • This novel liquid composition also imparts the excellent mobility or slideability, i.e., low frictional resistance, which is required for the smooth conveyor transport of such a can.
  • the composition also is relatively low in pollution potential, because it contains no deliberately introduced chromate or fluorine.
  • the invention also relates to processes for using the composition according to the invention.
  • This particular invention comprises a film-forming liquid composition for the treatment of metal surfaces in which the liquid composition has a pH of 2 to 6 and contains 1 to 50 g/L of phosphate ions, 0.2 to 20.0 g/L of oxyacid ions, 0.01 to 5.0 g/L of tin ions, and 0.01 to 5.0 g/L of condensed phosphate ion.
  • Treatment with this conversion treatment liquid composition lays down a strongly corrosion-resistant phosphate film on the surface of a tin-plated DI can.
  • the inventions disclosed in (2) Japanese Patent Application Laid Open Number 01-172,406 [172,406/89] and U. S. Patent 4,457,790 are examples of a treatment method intended to develop corrosion resistance and adhesiveness through the use of water soluble resin. These inventions teach methods for treating metal surfaces with a solution which contains a derivative of a suitable polyhydric phenol compound and an aminomethylene substituted phenolic polymer or oligomer respectively.
  • the treatment baths previously employed to treat the surface of aluminum and aluminum alloy of the aforementioned type can be generally classified into chromate types and non-chromate types.
  • the chromate types typically take the form of chromic acid chromate conversion treatments and phosphoric acid chromate conversion treatments. Chromic acid chromate conversion treatments entered into practical application in about 1950, and these are still widely used for heat exchanger fin material and the like.
  • This type of conversion treatment bath is based on chromic acid (CrO3) and hydrofluoric acid (HF) and also contains an accelerator. It lays down a film which contains modest quantities of hexavalent chromium.
  • the phosphoric acid chromate conversion treatment derives from the invention in United States Patent Number 2,438,877 (1945), and this type of conversion treatment bath is based on chromic acid (CrO3), phosphoric acid (H3PO4), and hydrofluoric acid (HF). It forms a film whose principal component is hydrated chromium phosphate (CrPO4 ⁇ 4H2O). As this film does not contain hexavalent chromium, it is currently widely employed as a paint under-coating treatment for the body and lid of beverage cans.
  • the invention disclosed in Japanese Patent Application Laid Open [Kokai or Unexamined] Number 52-131937 [131,937/77] is a typical prior art example within the realm of non-chromate types of treatments for aluminum.
  • the application of this conversion treatment bath exemplary of the prior art to the surface of aluminum generates a conversion film whose principal component is zirconium oxide or titanium oxide.
  • the high friction coefficient of the exterior can surface causes the can surface to have a poor slideability during conveyor transport of the can, which causes the can to tumble over sideways and thus impairs the transport operation.
  • Can transportability is a particular issue with respect to transport to the printer in a high speed continuous manufacturing plant. It is therefore important in the can manufacturing industry to reduce the static friction coefficient of the exterior can surface without compromising the adhesiveness of any paint or lacquer to be coated on the can.
  • the invention disclosed in (3) Japanese Patent Application Laid Open Number 64-85292 [85,292/89] is an example of a method for improving the slideability.
  • This invention concerns an agent for treating the surfaces of metal cans.
  • This particular agent contains water-soluble organic material selected from phosphate esters, alcohols, monovalent and polyvalent fatty acids, fatty acid derivatives, and mixtures of the preceding.
  • EP-A-0 091 166 discloses a process and compositions for conversion coatings on treated or untreated metal surfaces, e.g. untreated aluminum.
  • EP-A-0 312 176 do not contain any resin but contain phosphate and condensed phosphate and tin ions being used for conversion coating of metal surfaces.
  • the above-described invention (1) does lead to the formation of a strongly corrosion-resistant phosphate film on conventional tin-plated DI can; however, the tin-plated DI can produced over the last few years has used smaller quantities of tin plating in response to economic pressures. This has necessitated surface treatments with a far better corrosion resistance than before, and this demand is not entirely satisfied by invention (1).
  • the other above described inventions do not always result in a satisfactorily stable corrosion resistance with the tin-plated DI can produced over the last few years or with aluminum cans.
  • the above-described invention (3) does in fact improve the slideability, but it sometimes does not improve the corrosion resistance or paint adhesiveness to an adequate degree.
  • the present invention provides a liquid composition for treating the surface of tin-plated DI can, said liquid composition being characterized by a pH of 2.0 to 6.5 and containing 1 to 30 g/L of phosphate ions, 0.1 to 5 g/L of condensed phosphate ion if used on tin plated steel or 0.1 to 10 g/L of condensed phosphate ions if used on aluminum, and 0.1 to 20 g/L (as solids) of water-soluble resin with the following general formula: where n is an integer within the range from 10 to 80 inclusive; each of X and Y is independently selected from hydrogen or a group "Z" with the formula given below, except that at least 15 % of the total of all the X and Y groups in this component of the composition are Z rather than hydrogen; and where each of R1 and R2 independently is a C1 to C10 alkyl and/or hydroxyalkyl group.
  • a surface-treatment liquid composition according to the present invention provides an aluminum or a tin-plated DI can surface with an excellent corrosion resistance and paint adhesiveness prior to its painting or printing and also generates the excellent slideability necessary for smooth conveyor transport of the can. Finally, because the treatment bath according to the present invention does not contain chromium or fluorine, the waste water treatment load is substantially reduced compared to most prior treatment baths, especially for aluminum.
  • the surface-treatment liquid composition according to the present invention is an acidic treatment liquid composition whose essential components are phosphate ions, condensed phosphate ions, and water-soluble resin of a particular type.
  • the phosphate ions can be introduced into the treatment liquid composition using phosphoric acid (H3PO4), sodium phosphate (Na3PO4), and the like. Its content should fall within the range preferably of 1 to 30 g/L and more preferably of 5 to 15 g/L. At below 1 g/L, the reactivity is relatively poor and film formation generally will not be satisfactory. A good-quality film can be formed at values in excess of 30 g/L, but the cost of the treatment liquid composition is increased and the economics are therefore impaired.
  • H3PO4 phosphoric acid
  • Na3PO4 sodium phosphate
  • the condensed phosphate ions are selected from pyrophosphate ions, tripolyphosphate ions, and tetrapolyphosphate ions.
  • the acid or salt can be used to introduce the condensed phosphate ions.
  • pyrophosphate ions when pyrophosphate ions are to be introduced, pyrophosphoric acid (H4P2O7), sodium pyrophosphate (Na4P2O7), and the like can be used.
  • This component should be present at 0.1 to 5 g/L for treating tin plated steel or at 0.1 to 10 g/L for treating aluminum, and the range of 0.4 to 1 g/L for tin plate or 1.0 to 4.0 g/L for aluminum is particularly preferred.
  • the etching activity is undesirably high at values in excess of 5 g/L on tin plate or 10 g/L on aluminum, and the film-forming reaction is inhibited.
  • the water-soluble resin used by the present invention comprises polymers with the general formula already given above.
  • the molecular weight is too low at values of n in this formula below 10, so that little or no improvement in corrosion resistance will normally be observed.
  • the aqueous solution has a reduced stability, which will normally generate problems in practical applications.
  • Functional groups R1 or R2 containing 11 or more carbons usually would reduce the stability of an aqueous solution containing them.
  • the group Z is preferably -CH2N(CH3)2 or -CH2N(CH3)CH2CH2OH. When less than 15 % of the total of all the X's and Y's in the resin are Z, there are usually stability problems with the compositions that would otherwise be according to the invention.
  • the water soluble resin should be present at a concentration of from 0.1 to 20 g/L on a solids basis. At values less than 0.1 g/L, stable film formation on the can surface highly problematic. Values in excess of 20 g/L are uneconomical due to the increased cost of the treatment solution.
  • the pH of the treatment liquid composition must be from 2.0 to 6.5. Etching is heavy and film formation is impaired at pH values less than 2.0. At values in excess of 6.5, the liquid composition life is shortened because the resin tends to precipitate and sediment.
  • the pH can be adjusted through the use of an acid, for example, phosphoric acid, nitric acid, hydrochloric acid, and the like, or through the use of a base, for example, sodium hydroxide, sodium carbonate, ammonium hydroxide, and the like.
  • metal ions e.g., tin, aluminum, or iron
  • precipitation may occur due to the formation of a resin/metal ion complex
  • a chelating agent in addition to the resin as specified above should preferably be added to the treatment liquid composition in such cases. While this chelating agent is not specifically restricted, chelating agents useful within this context are exemplified by tartaric acid, ethanolamine, gluconic acid, oxalic acid, and the like.
  • the method for preparing the surface-treatment liquid composition according to the present invention can be briefly described as follows. Prescribed quantities of phosphate ions and condensed phosphate ions as described above are dissolved in water with thorough stirring. When the pH of this liquid composition is not already less than 7, it is adjusted to below 7 using the appropriate acid as noted above. The water-soluble resin specified by the present invention is then added and completely dissolved while stirring, and the pH is adjusted if necessary as discussed above.
  • the film which is formed by means of the present invention's surface-treatment liquid composition is believed to be an organic and inorganic composite film which is composed primarily of the resin and phosphate salts (the main component is believed to be tin phosphate when tin plated substrates are treated). While the invention is not limited by any theory, it is believed that the substrate is etched by the phosphate ions and condensed phosphate ions, the pH at this time is locally increased at the interface, and phosphate salt is deposited on the surface. Moreover, the amino group in the resin has a chelating activity, and it may form a type of coordination compound with the fresh surface of the substrate generated by etching. The simultaneous presence of the condensed phosphate ions is thought to promote formation of resin/metal coordination compounds, and this may make possible the stable formation of the composite film on the surface over a broad pH range.
  • a process according to the invention for treating tin-plated DI can using a surface-treatment liquid composition of the present invention will now be considered.
  • the present invention's treatment liquid composition can be applied by the following process sequence, which is a preferred sequence for a process according to this invention.
  • the corrosion resistance of treated tin plated cans was evaluated using the iron exposure value ("IEV"), which was measured in accordance with the teaching of United States Patent No. 4,332,646. The corrosion resistance is better at lower IEV values, and a score below 150 is generally regarded as excellent.
  • the paint adhesiveness was evaluated based on the peel strength as follows: The surface of the treated can was coated with an epoxy/urea can paint to a film thickness of 5 to 7 micrometers; this was baked at 215 ° C for 4 minutes; the can was then cut into a 5 x 150 mm strip; a test specimen was prepared by hot-press adhesion with polyamide film; and this was peeled by the 180 ° peel test method. Accordingly, the paint adhesiveness improves as the peel strength increases, and values in excess of 1.5 kilograms of force per 5 millimeters of width (hereinafter "kgf/5 mm-width") on tin plate or in excess of 4.0 kgf/5 mm-width on aluminum are generally regarded as excellent.
  • kgf/5 mm-width 1.5 kilograms of force per 5 millimeters of width
  • the slideability was evaluated by measuring the static friction coefficient of the exterior surface of the can.
  • the slideability improves as the static friction coefficient declines, and values below 1.0 are generally regarded as excellent.
  • Tin-plated DI cans were prepared by drawing and ironing tin-plated steel sheet. They were cleaned with a 1% hot aqueous solution of a weakly alkaline degreaser (FINE CLEANERTM 4361A, registered brand name of Nihon Parkerizing Company, Limited), then sprayed with a surface-treatment liquid composition according to the invention as described below for each specific example.
  • a weakly alkaline degreaser FINE CLEANERTM 4361A, registered brand name of Nihon Parkerizing Company, Limited
  • Aluminum DI cans were prepared by drawing and ironing aluminum alloy (A3004) sheet. They were cleaned with a 3 % hot aqueous solution of an acidic degreaser (PARCLEANTM 400, commercially available from Nihon Parkerizing Company, Ltd.), then sprayed a with surface-treatment liquid composition according to the invention as described below for each specific example.
  • PARCLEANTM 400 commercially available from Nihon Parkerizing Company, Ltd.
  • a tin-plated DI can was cleaned as described above, then sprayed with surface-treatment liquid composition 1 as described below, heated to 60 ° C, for 30 seconds, then washed with tap water, sprayed with de-ionized water (with a specific resistance of at least 3,000,000 ohm ⁇ cm) for 10 seconds, and, finally, dried in a hot air-drying oven at 180 ° C for 3 minutes.
  • CELLOSOLVETM solvent in an amount of 100 grams was introduced into a 1,000 milliliter (“mL”) reaction flask equipped with a condenser, nitrogen inlet tube, overhead stirrer, and thermometer, and 60 g of poly ⁇ 4-vinylphenol ⁇ with a molecular weight of 5,000 was added and dissolved. Then 40 g of 2-methylaminoethanol and 100 g of deionized water were added, and this was reacted by heating to 50 ° C. Then 40 g of 37 % aqueous formaldehyde solution was added over 1 hour, followed by stirring at 50 ° C for 2 hours and by stirring for an additional 3 hours at 80 ° C.
  • the reaction product was cooled, 15 g of 85% orthophosphoric acid was added, and 700 g of deionized water was also added.
  • the resin was then precipitated by the addition of 10 % aqueous sodium hydroxide solution until the pH of the reaction solution reached 8 to 9.
  • the precipitated resin was filtered off, washed with water, and dried.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 2, heated to 60 ° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 3 heated to 60 ° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 4 heated to 60 ° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 5 heated to 60 ° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 6 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 7 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 8 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 9 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 10 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Tin-plated DI can was cleaned using the same conditions as in Example 1 and was then treated with a 30 second spray of surface-treatment liquid composition 11 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • H3PO4 75% phosphoric acid
  • Water-soluble resin 4 had the chemical formula: The average value of n was about 40.
  • SO3 liquid sulfur trioxide
  • Table 1 Test Results IEV Peel Strength, kgf/5 mm-width Frictional Coefficient Example 1 40 2.0 0.8 Example 2 40 2.0 0.8 Example 3 50 2.0 0.8 Example 4 40 2.0 0.8 Example 5 40 2.0 0.8 Example 6 60 2.0 0.8 Example 7 40 2.0 0.8 Comparison Example 1 250 1.5 1.0 Comparison Example 2 950 1.3 1.0 Comparison Example 3 500 1.5 1.0 Comparison Example 4 750 1.3 1.0
  • An aluminum DI can was cleaned as described above, then sprayed with surface-treatment liquid composition 12 as described below, heated to 60 ° C, for 30 seconds, then washed with tap water, sprayed with de-ionized water (with a specific resistance of at least 3,000,000 ohm ⁇ cm) for 10 seconds, and, finally, dried in a hot air-drying oven at 180 ° C for 3 minutes.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 13, heated to 60 ° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 14 heated to 60 ° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 15 heated to 60 ° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 16 heated to 60 ° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 17 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 18 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 19 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 20 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 21 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned using the same conditions as in Example 8 and was then treated with a 30 second spray of surface-treatment liquid composition 22 heated to 60° C. This treatment was followed with a water wash and drying using the same conditions as in Example 1.
  • Example 8 An aluminum DI can was cleaned under the same conditions as in Example 8 and was then treated with a 30 second spray of a 2 % aqueous solution (heated to 50° C) of a commercial non-chromate agent (PARCOATTM K 3761, from Nihon Parkerizing Company, Ltd.). This treatment was followed by a water wash and drying under the same conditions as in Example 1.
  • a commercial non-chromate agent PARCOATTM K 3761, from Nihon Parkerizing Company, Ltd.
  • Treatment of tin-plated or aluminum DI cans using a surface-treatment liquid composition with the composition given above imparts an excellent corrosion resistance and painting or printing. In addition, it also produces a film which has the excellent slideability necessary for smooth conveyor transport of the can.
  • the condensed phosphate ions comprises at least one selection from pyrophosphate ions, tripolyphosphate ions, and tetrapolyphosphate ions and when: or a film is produced which evidences an even greater improvement in the corrosion resistance, paint adhesiveness, and slideability.
  • the treatment solution according to this invention is substantially free from chromium and fluoride and therefore has relatively low pollution potential.

Claims (10)

  1. Composition liquide aqueuse pour le traitement de surfaces d'acier étamé ou d'aluminium et d'alliages d'aluminium, cette composition ayant un pH dans la plage de 2,0 à 6,5 et consistant essentiellement en de l'eau et :
    (A) de 1 à 30 g/l d'ions phosphate,
    (B) de 0,1 à 5 g/l d'ions phosphate condensés si l'utilisation concerne l'acier étamé ou de 0,1 à 10 g/l si l'utilisation concerne l'aluminium, et
    (C) de 0,1 à 20 g/l sous forme de matière solide d'une résine hydrosoluble, composant choisi dans le groupe de résines, y compris les mélanges de résines, ayant la formule chimique générale :
    Figure imgb0018
     dans laquelle n est un nombre entier dans la plage de 10 à 80 inclus; chacun de X et Y est choisi indépendamment de l'hydrogène ou d'un groupe "Z" avec la formule donnée ci-dessous, sauf qu'au moins 15% du total de tous les groupes X et Y dans de composant de la composition sont Z plutôt que l'hydrogène; et
    Figure imgb0019
     dans laquelle chacun de R₁ et R₂ dans chacun des groupes Z dans la formule est choisi indépendamment dans le groupe constitué dans les groupes alkyle contenant de 1 à 10 atomes de carbone par groupe et des groupes hydroxyalkyle contenant de 1 à 10 atomes de carbone par groupe; la composition ne contient pas de chrome et de fluor mais elle contient facultativement un agent chélatant.
  2. Composition liquide selon la revendication 1, dans laquelle le composant (B) est choisi dans le groupe constitué par les ions pyrophosphate, les ions tripolyphosphate, les ions tétrapolyphosphate, et leurs mélanges.
  3. Composition liquide selon la revendication 2, dans laquelle la formule chimique générale pour le composant résine hydrosoluble est
    Figure imgb0020
     ou
    Figure imgb0021
  4. Composition liquide selon la revendication 1, dans laquelle dans la formule chimique générale pour le composant de résine hydrosoluble est
    Figure imgb0022
     ou
    Figure imgb0023
  5. Composition liquide selon les revendications 1 à 4, comprenant de 5 à 15 g/l du composant (A).
  6. Composition liquide selon les revendications 1 à 5, comprenant de 0,4 à 1 g/l du composant (B) lors d'une utilisation sur de l'acier étamé ou de 1,0 à 4,0 g/l du composant (B) lors d'une utilisation sur de l'aluminium.
  7. Procédé pour le traitement d'un acier étamé embouti et étiré, d'un conteneur en métal aluminium ou alliage d'aluminium par mise en contact avec une composition liquide aqueuse pour former à la surface du conteneur métallique une couche de revétement par conversion qui augmente la résistance à le corrosion du conteneur après la peinture ou l'impression subséquente, caractérisé en ce que la composition liquide aqueuse est telle que mentionnée dans les revendications 1 - 6.
  8. Procédé selon la revendication 7, dans lequel le temps d'impact se situe dans la plage de 2 à 60 secondes, le contact s'effectue par pulvérisation, et la température de la composition liquide pendant le contact se situe entre 20 et 80°C.
  9. Procédé selon la revendication 8, dans lequel la température de la composition liquide pendant le contact se situe entre 40 et 60 °C.
  10. Procédé selon les revendications 7 à 9, comprenant les étapes supplémentaires consistant d'abord à dégraisser puis à laver à l'eau du robinet la surface du conteneur avant la mise en contact avec la composition liquide aqueuse et dans l'ordre, le lavage à l'eau du robinet, le lavage à l'eau désionisée et le séchage après contact avec le liquide aqueux.
EP91912131A 1990-06-19 1991-06-13 Composition liquide et procede de traitement de boites en aluminium ou en fer blanc destines a ameliorer la resistance a la corrosion et a reduire le coefficient de friction Expired - Lifetime EP0533823B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP16044390A JPH0450272A (ja) 1990-06-19 1990-06-19 ぶりきｄｉ缶の表面処理液
JP160443/90 1990-06-19
JP179271/90 1990-07-06
JP17927190A JPH0466671A (ja) 1990-07-06 1990-07-06 アルミニウム及びアルミニウム合金用表面処理液
PCT/US1991/004250 WO1991019828A1 (fr) 1990-06-19 1991-06-13 Composition liquide et procede de traitement de boites en aluminium ou en fer blanc destines a ameliorer la resistance a la corrosion et a reduire le coefficient de friction

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EP0533823A1 EP0533823A1 (fr) 1993-03-31
EP0533823B1 true EP0533823B1 (fr) 1995-01-04

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EP (1) EP0533823B1 (fr)
AT (1) ATE116694T1 (fr)
AU (1) AU647498B2 (fr)
BR (1) BR9106572A (fr)
CA (1) CA2085489C (fr)
DE (1) DE69106510T2 (fr)
ES (1) ES2067942T3 (fr)
WO (1) WO1991019828A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04187782A (ja) * 1990-11-21 1992-07-06 Nippon Parkerizing Co Ltd ぶりきｄｉ缶用表面処理液
JP2771110B2 (ja) * 1994-04-15 1998-07-02 日本パーカライジング株式会社 アルミニウム含有金属材料用表面処理組成物および表面処理方法
DE69616066T2 (de) * 1995-07-10 2002-05-29 Nippon Paint Co Ltd Metalloberflächenbehandlung, verfahren dafür und obeflächenbehandeltes metallisches material
JP3620893B2 (ja) * 1995-07-21 2005-02-16 日本パーカライジング株式会社 アルミニウム含有金属用表面処理組成物及び表面処理方法
US6059896A (en) * 1995-07-21 2000-05-09 Henkel Corporation Composition and process for treating the surface of aluminiferous metals
JP3544761B2 (ja) * 1995-10-13 2004-07-21 日本パーカライジング株式会社 アルミニウム含有金属材料用表面処理組成物および表面処理方法
GB9625652D0 (en) * 1996-12-11 1997-01-29 Novamax Technologies Limited The treatment of aluminium surfaces
JP2002518594A (ja) * 1998-06-19 2002-06-25 アルコア インコーポレイテッド アルミニウム製品表面の汚れを防止する方法
EP1221497A3 (fr) * 1998-06-19 2003-12-03 Alcoa Inc. Procédé d'inhibition de tâches à la surface de produits en aluminium

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4376000A (en) * 1980-11-28 1983-03-08 Occidental Chemical Corporation Composition for and method of after-treatment of phosphatized metal surfaces
US4433015A (en) * 1982-04-07 1984-02-21 Parker Chemical Company Treatment of metal with derivative of poly-4-vinylphenol
US4457790A (en) * 1983-05-09 1984-07-03 Parker Chemical Company Treatment of metal with group IV B metal ion and derivative of polyalkenylphenol
GB8523572D0 (en) * 1985-09-24 1985-10-30 Pyrene Chemicals Services Ltd Coating metals
JPH01100281A (ja) * 1987-10-13 1989-04-18 Nippon Parkerizing Co Ltd 金属表面の皮膜化成処理液
US4970264A (en) * 1987-12-04 1990-11-13 Henkel Corporation Treatment and after-treatment of metal with amine oxide-containing polyphenol compounds
JPH02101174A (ja) * 1988-10-06 1990-04-12 Nippon Paint Co Ltd 冷間加工用リン酸亜鉛処理方法
JPH03207766A (ja) * 1990-01-10 1991-09-11 Nippon Parkerizing Co Ltd ぶりきｄｉ缶の表面処理方法

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CA2085489A1 (fr) 1991-12-20
DE69106510D1 (de) 1995-02-16
ES2067942T3 (es) 1995-04-01
EP0533823A1 (fr) 1993-03-31
AU647498B2 (en) 1994-03-24
WO1991019828A1 (fr) 1991-12-26
AU8069391A (en) 1992-01-07
BR9106572A (pt) 1993-06-01
ATE116694T1 (de) 1995-01-15
CA2085489C (fr) 2000-12-12
DE69106510T2 (de) 1995-08-03

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