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WO2019089347A1 - Procédé et composition pour traiter des surfaces métalliques à l'aide de composés de chrome trivalent - Google Patents

Procédé et composition pour traiter des surfaces métalliques à l'aide de composés de chrome trivalent Download PDF

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Publication number
WO2019089347A1
WO2019089347A1 PCT/US2018/057533 US2018057533W WO2019089347A1 WO 2019089347 A1 WO2019089347 A1 WO 2019089347A1 US 2018057533 W US2018057533 W US 2018057533W WO 2019089347 A1 WO2019089347 A1 WO 2019089347A1
Authority
WO
WIPO (PCT)
Prior art keywords
composition
metal surface
pretreatment composition
trivalent chromium
chromium compound
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.)
Ceased
Application number
PCT/US2018/057533
Other languages
English (en)
Inventor
Jose B. Rivera
Cody HANNA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bulk Chemicals Inc
Original Assignee
Bulk Chemicals Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bulk Chemicals Inc filed Critical Bulk Chemicals Inc
Priority to MX2020004244A priority Critical patent/MX2020004244A/es
Priority to CA3079516A priority patent/CA3079516A1/fr
Priority to EP18804756.7A priority patent/EP3704286B1/fr
Priority to US16/759,959 priority patent/US20200325582A1/en
Priority to CN201880069568.5A priority patent/CN111356786A/zh
Priority to KR1020207014731A priority patent/KR20200081415A/ko
Priority to BR112020008635-5A priority patent/BR112020008635A2/pt
Priority to JP2020524020A priority patent/JP2021501263A/ja
Publication of WO2019089347A1 publication Critical patent/WO2019089347A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—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
    • C23C22/08—Orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • C23C22/33—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also phosphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—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
    • C23C22/08—Orthophosphates
    • C23C22/10—Orthophosphates containing oxidants
    • 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
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium

Definitions

  • This invention relates generally to compositions and the use of such compositions for passivating and improving the paint adhesion of metal surfaces. More particularly, this invention relates to an aqueous composition, suitable for use as a dried-in-place coating for metal and to methods for using that composition.
  • Known methods of treating metal surfaces to improve paint adhesion and corrosion resistance of painted metal surfaces include two general classes of chemistries.
  • the first class is based on traditional conversion coating types of chemistries, such as zinc phosphate, iron phosphate, chromium chromate, chromium phosphate, etc.
  • the second class is based on more recent developments in the metal pretreatment industry and is characterized by what is now referred to as "dried-in-place" technology.
  • Traditional conversion coating chemistries require rinsing of the metal substrate to remove applied pretreatment solution. Dried-in-place chemistries allow for the applied solutions to be dried on the metal substrate to which they are applied, without rinsing prior to the application of a paint.
  • Hexavalent chromium shows toxicological effects and has been determined by the U.S. Environmental Protection Agency as a risk to the environment and by the U.S. Occupational Safety and Health Agency as a health risk. Moreover, chemistries based on hexavalent chromium are classified as carcinogens by these agencies.
  • the composition consists essentially of water, a trivalent chromium compound with the formula Cr(H x P0 4 )3, where x can be 1.5 or 2, a silica compound, and hydrogen peroxide.
  • the composition consists of water, a trivalent chromium compound with the formula Cr(H x P0 4 )3, where x can be 1.5 or 2, a silica compound, and hydrogen peroxide.
  • the trivalent chromium compound is present in an amount of between: about 10% wt. % to about 5% wt. %, about 10% wt. % to about 2.5% wt. %, about 10% wt. % to about 1% wt. %, or about 10% wt. % to about 0.5% wt. %.
  • the present invention is a process for treating a metal surface.
  • the process includes the step of contacting the metal surface with a composition comprising water, a trivalent chromium compound with the formula Cr(H x P0 4 )3, where x can be 1.5 or 2, a silica compound, and optionally hydrogen peroxide.
  • FIG. 1 is a side-by-side photograhic comparison of the results from Composition 1 as compared to the Control composition for panels scribed and exposed to neutral salt spray for a period of 250 hours per ASTM Bl 17;
  • FIG. 2 is a side-by-side photographic comparison of the results from Composition 1 as compared to the Control composition for panels scribed and exposed to neutral salt spray for a period of 250 hours per ASTM Bl 17;
  • FIG. 5 is a side-by-side photographic comparison of the results from Composition 1 as compared to the Example 1 composition disclosed in the Rausch patent for panels scribed and exposed to neutral salt spray for a period of 250 hours per ASTM Bl 17;
  • compositions of the present invention are applied to a metal surface after cleaning but before some final coat is applied to the metal surface, contributing to at least one of the following: (1) improving the paint adhesion of the metal surface; (2) improving the corrosion resistance of the metal surface; and (3) maintaining or reducing the resistivity of the metal surface.
  • Compositions of the present invention include compositions which significantly improve one or two of these characteristics, even though at least one of the others is worsened to a lesser extent. The improvement could be due to the compositions alone or the compositions in combination with other process steps.
  • Such compositions are referred to herein or in the metal treatment industry as pretreatment compositions, conversion coatings, or working compositions.
  • Resistivity is defined as resistance per unit surface area; typical units of resistivity are microhms per square inch.
  • hexavalent chromium compound means compounds, namely salts, of chromium in which the chromium has a valence of plus 6.
  • anions could be used, and more than one hexavalent chromium compound could be used.
  • the hexavalent chromium compound is anhydrous chromic acid (Cr0 3 ), chromic acid (H 2 C1O 4 ), or chromium chromate (CrsOn).
  • pretreatment composition means any composition which improves the paint adhesion, lowers electrical contact resistance, and improves corrosion resistance of a metal surface.
  • Aqueous pretreatment compositions are used as a pretreatment before painting and may be used as a passivation treatment to reduce the formation of corrosion in the uncoated (unpainted) condition.
  • the composition may be called a pretreatment composition for convenience, it is a composition used to improve the adhesion of subsequently applied paint and resist corrosion of the unpainted surface.
  • the term “treating” means applying a treatment or cleaning, rinsing, and applying a pretreatment.
  • the pretreatment also functions as a sealant to seal the metal surface, so the term “treating” shall optionally include the step of sealing the metal surface.
  • “treating” optionally can include process steps up through and including painting.
  • treatment steps may also include a step of applying a decorative coating, such as painting.
  • the pretreatment may be rinsed first or dried-in-place before application of the paint. Each of these steps play a role in a final product's ability to resist corrosion and minimize paint loss.
  • the treatment composition can be used as a pre-paint treatment.
  • trivalent chromium compound means compounds, namely salts, of chromium in which the chromium has a valence of plus 3. No hexavalent chromium (or at worst a de minimus, inconsequential amount of it) is present in such compounds. A wide range of anions could be used, and more than one trivalent chromium compound could be used.
  • the trivalent chromium compound is a compound with the formula Cr(H x P0 4 ) 3 , where x can be 1.5 or 2.
  • the trivalent chromium compound is present in an amount of between: about 10% wt. % to about 5% wt. %, about 10% wt. % to about 2.5% wt. %, about 10% wt. % to about 1% wt. %, or about 10% wt. % to about 0.5% wt. %.
  • the silica is present in an amount of less than 2% wt. %; less than 1.75% wt. %; or less than 1.5% wt. %.
  • compositions given above are of the working bath. It is desirable, of course, to transport the product in the form of a concentrate, namely up to a 10 to 100 fold increase in concentration of the above working bath concentrations.
  • the upper limit of such concentrates is the solubility limit of the first constituent to meet or exceed its solubility limit.
  • the pH of the compositions is preferably, when the composition is used to treat cold rolled steel, between 1 to 4. More preferably, the pH is about 1 .75.
  • compositions according to the invention may be made by mixing the ingredients in any of a number of sequences.
  • a hexavalent chromium compound is a precursor material
  • the hexavalent chromium compound is first reduced in the presence of phosphoric acid to create a trivalent chromium compound: chromium dihydrogen phosphate (Cr(H 2 P0 4 ) 3 ). Hydrogen peroxide is the reducing agent. After the chromium is reduced, silica is added.
  • hexavalent chromium compound is a precursor material
  • the hexavalent chromium compound is metered into a solution containing phosphoric acid and hydrogen peroxide until the hexavalent chromium compound is fully reduced. After the chromium is reduced, silica is added.
  • a concentrate i.e., master batch
  • a concentrate is created by combining the trivalent chromium compound with the formula Cr(H x P0 4 ) 3 , where x is between 1.5 and 2, with water.
  • a silica compound can then be added to the solution.
  • the concentrate can then be diluted, preferably with deionized water, to create the desired concentration at the metal treatment site prior to use.
  • some residual hydrogen peroxide may remain.
  • the hydrogen peroxide is fully utilized.
  • the hydrogen peroxide concentration is within the following range: from 0 to about 0.85 grams I I2O2 (35%) per gram of Cr(H 2 P0 4 ) 3 .
  • a metal surface is coated with a pretreatment composition of the present invention.
  • the composition may contact the metal surface by any number of techniques known in the art.
  • One such method is immersion coating in which the metal is immersed in the bath of pretreatment.
  • Other techniques known in the art including spraying, roll coating, or reverse roll coating, as well as manual application (e.g., brushing).
  • the coating step is done for a time sufficient to achieve the desired coating weight on the metal surface, which can be determined empirically. This desired coating weight will depend on a number of factors well-known in the art.
  • the amount of coating is sufficient to leave from about 0.1 to about 30 milligrams of chromium and phosphate per each square foot of dried metal surface as determined by the weight-strip-weight method. In another embodiment, the amount of coating is sufficient to leave from about 1 to about 10 milligrams of chromium per each square foot of dried metal surface as determined by x-ray fluorescence, and most preferably about 2.5 to about 3.5 milligrams of chromium per each square foot of dried metal surface as determined by x-ray fluorescence.
  • a process for treating a metal surface to improve corrosion resistance, improve paint adhesion, and/or maintain low electrical contact resistance comprises: (1 ) cleaning the metal surface to form a cleaned metal surface; (2) rinsing the cleaned metal surface with water to form a rinsed metal surface; and (3) contacting the rinsed metal surface with a composition comprising water, a trivalent chromium compound with the formula Cr(H x P0 4 )3, where x can be 1.5 or 2, a silica compound, and hydrogen peroxide.
  • the cleaning step may be carried out in any manner known in the art.
  • the types of cleaners suitable for use in the present invention will vary with a number of factors, including the metal being treated, the desired application, and the amount and type of impurities and soils on the metal surface. As such, the preferred cleaners can be determined empirically based on these factors.
  • an alkaline cleaner is used.
  • An exemplary alkaline cleaning agent which can be used in connection with the present invention is Bulk Kleen® 84 IMC cleaner, an alkaline liquid cleaner sold by Bulk Chemicals, Incorporated of Reading, Pa.
  • a phosphoric acid cleaner is used.
  • the cleaning step may be accomplished by contacting the metal surface with a bath of an alkaline cleaning solution to form a cleaned metal surface.
  • the alkaline cleaning solution may be an aqueous solution of an alkaline cleaning agent.
  • the cleaning bath cleans the metal surface by removing oil and other contaminants from the metal surface.
  • the cleaning bath is effective to remove the loose impurities and surface soils.
  • the cleaning bath removes soils and certain impurities from the metal surface.
  • a detergent cleaner additive may be included in the cleaning step.
  • pretreatment composition It may not be completely cleaned, however, in the sense that substantially all of the impurities have been removed such that it is ready to be exposed to a pretreatment composition. In some cases, it may be adequately cleaned, but in other cases, it should first be rinsed with water before being contacted with a pretreatment composition (i.e., substantially all of the impurities are removed by that point).
  • the rinsing step is well-known in the art, and deionized water is preferably used.
  • deionized water avoids the introduction of any deleterious ions, such as chloride ions, into the system.
  • the rinsing step can be two-fold, with a first rinsing step done using tap water and then rinsing with deionized water.
  • the metal surface may be rinsed with water once again, as is well-known in the art.
  • the rinsed metal surface can then be sealed.
  • Any chemical sealing composition well-known in the industry can be used.
  • the pretreatment composition includes just a composition comprising water, a trivalent chromium compound with the formula Cr(H x P0 4 )3, where x can be 1.5 or 2, a silica compound, and hydrogen peroxide.
  • an intervening rinsing step is preferably applied.
  • Determining the times of treatments of the metal surfaces with the baths of the various steps is well-known in the art. They need only be long enough to permit a sufficient time for cleaning (in the case of the cleaning step) or reaction (in the case of the pretreatment or sealing steps). They can be very short or as long as thirty minutes and depend on the stage of treatment, the type of application (e.g., immersion, spray), the type of metal surface, and the desired coating weight, among other factors.
  • the immersion time of a substrate into the composition solution will vary with the stage, and generally varies between approximately 1 minute up to about 10 minutes. The times for immersion are typically longer man when spray is used as the method of contact. Rinse times in general can be fairly short, e.g., 30 seconds to one minute.
  • the specific times of treatment may vary over wide ranges and can be readily determined by one of ordinary skill in the art.
  • compositions and processes of the present invention provide the stated benefits without the use of additional components which affect the basic and novel characteristics of the invention. When added to the composition in sufficient amounts, other components may affect the novel characteristics. For example, certain components may make the compositions unstable. Such components may affect the shelf-life of the treatment. Other components may degrade t he performance of the compositions and processes of the present invention.
  • the present invention provides environmentally friendly compositions and processes for treating metal, while still maintaining excellent paint adhesion and corrosion resistance. More particularly, the present invention avoids the use of hexavalent chromium, and its associated health hazards and disposal problems.
  • Figs. 1-6 illustrate the improved results obtained by employing aqueous compositi ons of this invention. These examples are exemplary, not restrictive, of the invention.
  • Cold rolled steel panels were treated via the following spray process. First, the panels were cleaned with a 3% v/v solution of Bulk Kleen®841MC for 5 seconds at 165° F. Second, the panels were rinsed at ambient temperature for 30 seconds. Third, the panels were again cleaned with Bulk leen®841MC at 3% v/v for 5 seconds at 165° F. Fourth, the panels were rinsed with deionized water at ambient temperature for 30 seconds. Fifth, Composition 2 was applied to the panels using a roll coater. Sixth, the panels were dried using hot air. Seventh, all panels were painted using a high reflectance white, single coat polyester at a dry film thickness of 0.7-0.8 mils.
  • Cold rolled steel panels were treated via the following spray process. First the panels were cleaned with a 3% v/v solution of Bulk Kleen®841MC for 5 seconds at 165° F. Second, the panels were rinsed at ambient temperature for 30 seconds. Third, the panels were again cleaned with Bulk Kleen®841MC at 3% v/v for 5 seconds at 165° F. Fourth, the panels were rinsed with deionized water at ambient temperature for 30 seconds. Fifth, the composition outlined in Example 1 of the Rausch et al. patent was applied to the panels using a roll coater. Sixth, the panels were dried using hot air. Seventh, all panels were painted using a high reflectance white, single coat polyester at a dry film thickness of 0.7-0.8 mils.
  • Composition 1 and Composition 2 outperformed the Rausch et al. formula because of the additional ions otlier than chromium, phosphate, and silica present in the Rausch et al. formula.

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne des compositions aqueuses utiles en tant que prétraitements avant la peinture permettant de réduire la formation de rouille dans l'état non revêtu. Les compositions sont essentiellement constituées d'eau, d'un composé de chrome trivalent de formule Cr(HxPO4)3, x pouvant représenter 1,5 ou 2, un composé de silice et éventuellement du peroxyde d'hydrogène. La composition peut avoir un pH compris entre environ 1 et environ 4. Un procédé de traitement d'une surface métallique comprend la mise en contact de la surface avec de telles compositions aqueuses. Les compositions et les procédés offrent des avantages par rapport au prétraitement de métal phosphate de zinc supposé être la norme dans l'industrie.
PCT/US2018/057533 2017-10-30 2018-10-25 Procédé et composition pour traiter des surfaces métalliques à l'aide de composés de chrome trivalent Ceased WO2019089347A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
MX2020004244A MX2020004244A (es) 2017-10-30 2018-10-25 Proceso y composicion para tratar superficies metalicas utilizando compuestos de cromo trivalente.
CA3079516A CA3079516A1 (fr) 2017-10-30 2018-10-25 Procede et composition pour traiter des surfaces metalliques a l'aide de composes de chrome trivalent
EP18804756.7A EP3704286B1 (fr) 2017-10-30 2018-10-25 Procédé et composition pour traiter des surfaces métalliques à l'aide de composés de chrome trivalent
US16/759,959 US20200325582A1 (en) 2017-10-30 2018-10-25 Process and composition for treating metal surfaces using trivalent chromium compounds
CN201880069568.5A CN111356786A (zh) 2017-10-30 2018-10-25 使用三价铬化合物处理金属表面的方法和组合物
KR1020207014731A KR20200081415A (ko) 2017-10-30 2018-10-25 3가 크롬 화합물을 이용한 금속 표면을 처리하기 위한 공정 및 조성물
BR112020008635-5A BR112020008635A2 (pt) 2017-10-30 2018-10-25 composição aquosa de pré-tratamento, método para preparar uma composição de pré-tratamento de metal e método para revestir uma superfície metálica
JP2020524020A JP2021501263A (ja) 2017-10-30 2018-10-25 三価クロム化合物を使用して金属表面を処理するためのプロセスおよび組成物

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762578787P 2017-10-30 2017-10-30
US62/578,787 2017-10-30

Publications (1)

Publication Number Publication Date
WO2019089347A1 true WO2019089347A1 (fr) 2019-05-09

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PCT/US2018/057533 Ceased WO2019089347A1 (fr) 2017-10-30 2018-10-25 Procédé et composition pour traiter des surfaces métalliques à l'aide de composés de chrome trivalent

Country Status (9)

Country Link
US (1) US20200325582A1 (fr)
EP (1) EP3704286B1 (fr)
JP (1) JP2021501263A (fr)
KR (1) KR20200081415A (fr)
CN (1) CN111356786A (fr)
BR (1) BR112020008635A2 (fr)
CA (1) CA3079516A1 (fr)
MX (1) MX2020004244A (fr)
WO (1) WO2019089347A1 (fr)

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Publication number Priority date Publication date Assignee Title
US20240401204A1 (en) * 2023-06-05 2024-12-05 Bulk Chemicals Method and composition for adjusting hydrophilicity of metal using a polyphenol and a silane modified nano particulate or amino acid amnd silica

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CA3079516A1 (fr) 2019-05-09
EP3704286B1 (fr) 2023-12-06
MX2020004244A (es) 2020-07-29
BR112020008635A2 (pt) 2020-10-06
EP3704286A1 (fr) 2020-09-09
US20200325582A1 (en) 2020-10-15

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