EP0016298B1 - Solution pour conférer une resistance au ternissage à des surfaces d'aluminium et procédé d'application - Google Patents

Solution pour conférer une resistance au ternissage à des surfaces d'aluminium et procédé d'application Download PDF

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Publication number
EP0016298B1
EP0016298B1 EP80100012A EP80100012A EP0016298B1 EP 0016298 B1 EP0016298 B1 EP 0016298B1 EP 80100012 A EP80100012 A EP 80100012A EP 80100012 A EP80100012 A EP 80100012A EP 0016298 B1 EP0016298 B1 EP 0016298B1
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EP
European Patent Office
Prior art keywords
weight percent
solution
water
poly
acrylic acid
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.)
Expired
Application number
EP80100012A
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German (de)
English (en)
Other versions
EP0016298A1 (fr
Inventor
Arnold F. Marcantonio
Paul Joseph Kress
John William Powers
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.)
Ball Corp
Original Assignee
Ball Corp
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Filing date
Publication date
Application filed by Ball Corp filed Critical Ball Corp
Priority to AT80100012T priority Critical patent/ATE4465T1/de
Publication of EP0016298A1 publication Critical patent/EP0016298A1/fr
Application granted granted Critical
Publication of EP0016298B1 publication Critical patent/EP0016298B1/fr
Expired 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
    • C23C22/60—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 alkaline aqueous solutions with pH greater than 8
    • C23C22/66—Treatment of aluminium or alloys based thereon

Definitions

  • This invention relates to a solution for imparting tarnish resistance on aluminum surfaces during exposure to hot water baths. This invention relates further to a method of treating an aluminum surface to impart tarnish resistance thereto.
  • inorganic ions including chromates and phosphates
  • conversion coatings Various corrosion inhibitors have been used commercially such as inorganic ions including chromates and phosphates and are referred to as conversion coatings.
  • the surface to be treated is subjected to an aqueous solution containing such ions. It is believed that these inorganic ions or heavy metal ions have the ability to bond or adhere in the form of insoluble oxides which resist tarnishing and corrosion of the metal surface.
  • the conversion coating solution is prepared and sprayed at some elevated temperature for a short period of time. After treating the metal surface with the solution, the surface is thoroughly rinsed with water to remove unreacted coating solution.
  • these inorganic ions have come under increasing scrutinization by environmental groups and governmental agencies with the result that there has been an increasing demand for compositions that do not have these detrimental heavy metal ions.
  • This solution should be free of toxic materials and be capable of forming on an aluminum surface a uniformly clear and colorless coating. Moreover, this solution should be in the position to protect surfaces of aluminum from blackening or other discoloration when exposed to hot or boiling water, especially during pasteurization processes associated with aluminum containers.
  • This object of the present invention is achieved by a solution for imparting tarnish resistance on aluminum surfaces during exposure to hot water baths which is characterized by containing 0.01 to 10 weight percent of a water-soluble portion containing 10 to 95 weight percent of an alkali metal silicate and 5 to 90 weight percent of an organic polymer selected from the group consisting of copolymers of acrylic acid and acrylic acid derivatives, poly(vinyl alcohol), poly(acrylic acid), poly(acrylamide), copolymer of maleic anhydride and methylvinyl ether, and poly(styrene sulfonic acid), and 90 to 99.99 weight percent water.
  • the invention also provides a method of treating an aluminum surface to impart tarnish resistance thereto, which is characterized by the steps of contacting said surface with a solution comprising 0.01 to 10 weight percent of a water-soluble portion containing 10 to 95 weight percent of an alkali metal silicate and 5 to 90 weight percent of an organic polymer selected from the group consisting of copolymers of acrylic acid and acrylic acid derivatives, poly(vinyl alcohol), poly(acrylic acid), poly(acrylamide), copolymers of maleic anhydride and methylvinyl ether, and poly(styrene sulfonic acid), and 90 to 99.99 weight percent water.
  • a solution comprising 0.01 to 10 weight percent of a water-soluble portion containing 10 to 95 weight percent of an alkali metal silicate and 5 to 90 weight percent of an organic polymer selected from the group consisting of copolymers of acrylic acid and acrylic acid derivatives, poly(vinyl alcohol), poly(acrylic acid), poly(acrylamide), copolymers of maleic anhydride
  • US-A-3 450 661 discloses an aqueous solution of an alkali silicate and acrylonitrile-acrylic acid copolymer, suitable for use as a binder for paints, tarnishes and the like.
  • the composition of this reference is formed by heating a solution of the alkali silicate with a particular copolymer to form a reaction product, the product being referred to as an acrylo-silicate binder.
  • the copolymer and alkali silicates constituents of the inventive solution are separate components and exist independently from one another.
  • the inventive solution for surface treating a metal to render the surface thereof tarnish and corrosion resistant contains an alkali metal silicate and a water-soluble organic polymer having displaceable hydrogens or displaced hydrogens.
  • the solutions are free of chromium ions and of the chromium subgroup of the Periodic Table and also materials such as ferricyanide and ferrocyanide.
  • silicates such as sodium, potassium or lithium, or mixtures of such silicates.
  • These silicates are known generally as water glasses and are usually aqueous solutions containing numerous varieties of alkali metal silicates, e.g., and may be represented generally as where M is sodium, potassium or lithium and x is an integer, generally between 1 and 10.
  • these aqueous silicate solutions have a specific gravity range from about 1.3 to about 1.6 and comprise about 23 to about 48 percent by weight of the alkali metal silicate.
  • Effective silica to metal oxide weight ratios range from about 1.87 to ⁇ about 10.0.
  • the useful organic polymers of the inventive solutions are organic, polymeric substances having displaceable or displaced hydrogens and are generally derived by polymerization of at least one monoolefinic compound through an aliphatic unsaturated group to yield a water-soluble synthetic polymer having a structure substantially free of cross-linkage.
  • the polymers herein are those water-soluble polymers having a linear polymeric structure of carbon or carbon with some other atom such as oxygen and contain in a pendent side chain a hydrophilic group from the class consisting of hydroxyl, carboxylic acids, carboxylic acid amides, sulfonic acids and phosphoric acids.
  • the aforementioned polymers fall into two classes, (1) those consisting of polymeric organic substances which in an aqueous medium will form organic anions having a substantial number of negative charges distributed at a multiplicity of positions on the polymer, and (2) those consisting of polymeric organic substances which in an aqueous medium will not form ions but nonetheless contain a sufficient number of hydrophilic groups to be water-soluble.
  • the first class of polymers may be referred to as anionic organic polymers and the second class may be called non-ionic organic polymers.
  • inventive solutions may be readily formulated in an aqueous media.
  • the organic and inorganic ingredients may be mixed in any order into water.
  • the solutions are prepared by mixing the components in a given amount of water with constant stirring within ambient temperatures until the ingredients go fully into solution.
  • the preferred range for both the alkali metal silicates and soluble polymers is 0.05 to 5 weight percent. At its most preferred embodiment a mixture of the alkali metal silicate and soluble polymer is present at about 3 weight percent based on the total weight of the solution. Lower concentrations do not produce an appreciable improvement in corrosion characteristics, and higher concentrations do not increase these characteristics, generally, any further.
  • To the inventive solutions may be readily added other various ingredients that are compatible with the system. Such ingredients include wetting agents, dyes, pigments and germicides.
  • the inventive solutions may be readily applied by various conventional means known to the art and including dipping, spraying, immersion, and roll-on techniques. It is believed that the compositions herein can be readily applied most economically and effectively by spraying.
  • the temperature of the solution will normally be from 30 to 90°C., preferably about 35 to about 60°C., and the contact time will be between about 15 and 90 seconds and usually less than 70 seconds.
  • Two commercial formulations were also tested as indicated in the table. The ratings in the respective columns represent the amount of discoloration for each example. *) Triton X-100 is acknowledged as trade mark
  • aqueous coating solutions containing an alkali metal silicate and a water-soluble organic polymer of the anionic, non-ionic type or mixtures thereof are effective in protecting aluminum surfaces.
  • the corrosion resistant properties of the coating formed by applications of such solutions include the ability of the coating to withstand blackening or other discoloration when subjected to boiling water for a period of time of at least two minutes or longer.
  • the particular solutions of the present invention can be used to protect pure aluminum or alloys of aluminum, for example, aluminum alloys containing minor amounts of metals such as, for example, magnesium, manganese, copper and silicon.
  • the surfaces may be dried by conventional means such as an oven having forced circulation of hot air. After the coating has dried it can be readily subjected to lacquering or to decorative operations which can include applying to the surfaces inks, paints or other resin coating. With the methods and compositions of this invention very excellent adhesion of these decorative finishes is realized.
  • non-ionic polymers poly(vinyl alcohol), poly(acrylamide) and a number of organic polymeric coagulants of vegetable and cellulosic origin including Gum Arabic.
  • anionic types are copolymers of acrylic acid, methacrylic acid, methyl methacrylate, methylacrylate and derivatives thereof, poly(acrylic acid), copolymers of maleic anhydride and methylvinyl ether, poly(styrene sulfonic acid), sodium poly(acrylate), sodium poly(methacrylate), poly(itaconicco-vinyl acetate) and the like.

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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)
  • Paints Or Removers (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (12)

1. Solution propre à conférer de la résistance au ternissage à des surfaces d'aluminium alors qu'elles sont exposées à des bains d'eau chaude, caractérisée en ce qu'elle contient 0,01 à 10% en poids d'une fraction soluble dans l'eau contenant 10 à 95% en poids d'un silicate de métal alcalin et 5 à 90% en poids d'un polymère organique choisi dans le groupe qui comprend copolymères d'acide acrylique et de dérivés d'acide acrylique, l'alcool polyvinylique, l'acide polyacrylique, le polyacrylamide, des copolymères d'anhydride moléique et d'éther méthylvinylique et l'acide poly styrène sulfonique, et 90 à 99,99% en poids d'eau.
2. Solution selon la revendication 1, caractérisée en ce que le silicate de métal alcalin est du silicate de sodium.
3. Solution selon la revendication 1, caractérisée en ce qu'elle comprend 0,01 à 5% en poids de la fraction soluble dans l'eau et 95 à 99,99% en poids d'eau.
4. Solution selon la revendication 1, caractérisée en ce que le silicate de métal alcalin est présent à raison d'une quantité comprise entre 60 et 70% en poids et le polymère organique est présent à raison d'une quantité comprise entre 30 et 40% en poids de la fraction soluble dans l'eau.
5. Solution selon la revendication 1, caractérisée en ce que le polymère organique est un copolymère d'acide acrylique et le dérivés d'acide acrylique.
6. Procédé de traitement d'une surface d'aluminium pour conférer à celle-ci de la résistance au ternissage, caractérisé par les étapes de mise en contact de cette surface avec une solution comprenant 0,01 à 10% en poids d'une fraction soluble dans l'eau contenant 10 à 95% en poids d'un silicate de métal alcalin et 5 à 90% en poids d'un polymère organique choisi dans le groupe qui comprend des polymères d'acide acrylique et des dérivés d'acide acrylique, l'alcool polyvinylique, l'acide polyacrylique, le polyacrylamide, des copolymères d'anhydride maléique et d'éther méthylvinylique et l'acide poly styrène sulfonique, et 90 à 99,99% en poids d'eau.
7. Procédé selon la revendication 6, caractérisé en ce que la surface d'aluminium est mise en contact avec la solution pendant au moins 10 secondes à une température d'au moins 40°C.
8. Procédé selon la revendication 6, caractérisé en ce que la surface est exposée à la solution à une température supérieure à 60°C.
9. Procédé selon la revendication 6, caractérisé en ce que le silicate de métal alcalin est présent à raison d'une quantité comprise entre 60 et 70% en poids et le polymère organique est présent à raison d'une quantité comprise entre 30 et 40% en poids de la fraction soluble dans l'eau.
10. Procédé selon la revendication 6, caractérisé en ce que la solution comprend 0,01 à 5% en poids de la fraction soluble dans l'eau et 95 à 99,99% en poids d'eau.
11. Procédé selon la revendication 6, caractérisé en ce que la solution est en contact avec la surface pendant environ une minute.
12. Procédé selon la revendication 6, caractérisé en ce qu'après avoir été mise en contact avec la solution, la surface d'aluminium est rincée.
EP80100012A 1979-01-22 1980-01-03 Solution pour conférer une resistance au ternissage à des surfaces d'aluminium et procédé d'application Expired EP0016298B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100012T ATE4465T1 (de) 1979-01-22 1980-01-03 Eine loesung zum verhindern des anlaufens von aluminiumoberflaechen und verfahren zu ihrer anwendung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US528079A 1979-01-22 1979-01-22
US5280 1979-01-22

Publications (2)

Publication Number Publication Date
EP0016298A1 EP0016298A1 (fr) 1980-10-01
EP0016298B1 true EP0016298B1 (fr) 1983-08-17

Family

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EP80100012A Expired EP0016298B1 (fr) 1979-01-22 1980-01-03 Solution pour conférer une resistance au ternissage à des surfaces d'aluminium et procédé d'application

Country Status (4)

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EP (1) EP0016298B1 (fr)
JP (1) JPS55119179A (fr)
AT (1) ATE4465T1 (fr)
DE (1) DE3064550D1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232485A1 (de) * 1982-09-01 1984-03-01 Hoechst Ag, 6230 Frankfurt Verfahren zur nachbehandlung von aluminiumoxidschichten mit alkalisilikat enthaltenden waessrigen loesungen und dessen verwendung bei der herstellung von offsetdruckplattentraegern
JPS62235477A (ja) * 1986-04-03 1987-10-15 Showa Alum Corp アルミニウムの親水性皮膜形成剤
CA2126887A1 (fr) * 1993-08-16 1995-02-17 Betzdearborn Inc. Produit exempt de chrome et de fluorure pour le traitement d'une surface metallique
DE19518514A1 (de) * 1995-05-19 1996-11-21 Setral Chemie Technology Gmbh Korrosionsschutzmittel
EP1221497A3 (fr) * 1998-06-19 2003-12-03 Alcoa Inc. Procédé d'inhibition de tâches à la surface de produits en aluminium
WO1999066104A2 (fr) * 1998-06-19 1999-12-23 Alcoa Inc. Procede d'inhibition de taches a la surface de produits en aluminium
JP2001164175A (ja) * 1999-12-09 2001-06-19 Kansai Paint Co Ltd 熱交換器フィン材用親水化処理剤
JP4558875B2 (ja) * 1999-12-21 2010-10-06 関西ペイント株式会社 熱交換器フィン材用親水化処理組成物
KR100376561B1 (ko) * 2000-07-11 2003-03-17 지성규 알루미늄 피막제의 제조방법 및 동 방법에 의해 제조한 피막제를 이용한 알루미늄판의 피막방법
FR2837218B1 (fr) * 2002-03-18 2005-02-18 Dacral Sa Composition de revetement de substrat metallique
CN115305464B (zh) * 2022-08-23 2024-02-06 江门市安诺特炊具制造有限公司 铝合金炊具的表面处理方法及铝合金炊具

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DE871239C (de) * 1951-06-08 1953-03-19 Basf Ag Verfahren zur Herstellung eines dichten feinkoernigen UEberzuges auf Gegenstaenden aus Aluminium oder Aluminiumlegierungen
FR1204092A (fr) * 1957-10-08 1960-01-22 Ca Atomic Energy Ltd Perfectionnements à la protection des alliages d'aluminium contre la corrosion
FR1381908A (fr) * 1963-02-07 1964-12-14 Alusuisse Procédé de protection de la surface de récipients en aluminium devant être stérilisés
US3175931A (en) * 1963-11-26 1965-03-30 Carl A Burgess Treatment of aluminum surfaces
US3297616A (en) * 1963-12-02 1967-01-10 Koppers Co Inc Self-curing silicate and acrylate coatings
NL135862C (fr) * 1964-07-28
CA994544A (en) * 1971-08-05 1976-08-10 Chih M. Hwa Corrosion inhibition

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TENSIDE-TEXTILHILFSMITTEL-WASCHROHSTOFFE, K. LINDER, Band III, 1971 Wissenschaftliche Verlagsgesellschaft mbH, Stuttgart *

Also Published As

Publication number Publication date
EP0016298A1 (fr) 1980-10-01
ATE4465T1 (de) 1983-09-15
JPS55119179A (en) 1980-09-12
DE3064550D1 (en) 1983-09-22

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