US1638273A - Method and composition of matter for surface-treating aluminum - Google Patents

Method and composition of matter for surface-treating aluminum Download PDF

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Publication number
US1638273A
US1638273A US87463A US8746326A US1638273A US 1638273 A US1638273 A US 1638273A US 87463 A US87463 A US 87463A US 8746326 A US8746326 A US 8746326A US 1638273 A US1638273 A US 1638273A
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Prior art keywords
aluminum
matter
composition
salt
treating aluminum
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Expired - Lifetime
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US87463A
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Pacz Aladar
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Individual
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Publication date
Priority to BE338925D priority Critical patent/BE338925A/xx
Application filed by Individual filed Critical Individual
Priority to US87463A priority patent/US1638273A/en
Priority to DEP54132D priority patent/DE480720C/en
Priority to FR626709D priority patent/FR626709A/en
Application granted granted Critical
Publication of US1638273A publication Critical patent/US1638273A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C18/00Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31Coating with metals
    • C23C18/32Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C18/00Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31Coating with metals
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical 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
    • C23C22/05Chemical 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
    • C23C22/06Chemical 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
    • C23C22/34Chemical 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

Definitions

  • the fluo-silicate employed is preferably that of sodium which is the cheapest and most readily available, although I do not limit myself thereto, a very convenient, satisfactory and effective concentration in practical use is that wherein the bath contains 0.15% of this material, but I do not limit myself to this strength.
  • a very convenient, satisfactory and effective concentration in practical use is that wherein the bath contains 0.15% of this material, but I do not limit myself to this strength.
  • iron-group, metal I intend to designate nickel and cobalt and any convenient salt thereof can apparently be used. I have had excellent success with the sulphate, nitrate, and chloride of these metals. A very convenient and practical concentration of the same is from 0.2% to 0.3%, although I do not limit myself thereto.
  • alkali salt I designate salts both of the fixed alkalies and of the volatile alkali, and the particular salt which I prefer to use is the nitrate although I have had a measurable degree of success with such other salts as the phosphate and sulphate.
  • ammonium, sodium, or potassium nitrate I have found that 1% is a very satisfactory concentration although I do not limit myself thereto. It appears to be necessary that this third ingredient be preponderant.
  • the solution is preferably employed hot, even up to the boiling point, and the articles to be treated are immersed therein for a greater or less length of time as determined by the extent of treatment desired which can readily be judged by the eye.
  • the effect of this treatment is to produce upon the surface a mottled, speckled, or spotted appearance, irregular portionsof varying sizes and shapesbein covered with a dense adherent,
  • the resulting coating is unaffected by heat and is highly resistant to abrasion even that of a steel brush, the unmodifiedaluminum surface yielding rather than the modified 'or coated portion.
  • the surface can be very thoroughly covered with the coating described. Care however, must be observed not to permit too great proximity between metallic articles receiving simultaneous treatment.
  • Stencils or other protective means can be employed if desired to shield any desired portion against the action of the solution.
  • the solution can be used repeatedly although additions of the several ingredients are required from time to time. Eventually the solution becomes sufiiciently contaminated with impurities, partly dissolved from the articles and partly of accidental entrance so that it must be discarded.
  • the articles after receiving the treatment hereinbefore described can be subjected, if desired, to further treatments designed to color the unmodified portions, or may be' covered with paint, lacquer, etc, which adheres much more strongly thereto than to the unmodified metal. Alloys of aluminum with other metals.
  • a dipping I solution for aluminum articles comprising a soluble flue-silicate, a soluble salt of a nonferrous metal of the iron group, and an alkali nitrate, all dissolved in water.

Description

Patented Aug, 9, 1927.
UNITED STA TES- PATENT OFFICE.
ALAIDAR PACZ, OF EAST CLEVELAND, OHIO.
METHOD AND COMPOSITIONOF MATTER FOR SURFACErTBEATING ALUMINUM.
1T0 Drawing.
and an alkali salt. The fluo-silicate employed is preferably that of sodium which is the cheapest and most readily available, although I do not limit myself thereto, a very convenient, satisfactory and effective concentration in practical use is that wherein the bath contains 0.15% of this material, but I do not limit myself to this strength. By non-ferrous, iron-group, metal I intend to designate nickel and cobalt and any convenient salt thereof can apparently be used. I have had excellent success with the sulphate, nitrate, and chloride of these metals. A very convenient and practical concentration of the same is from 0.2% to 0.3%, although I do not limit myself thereto. By alkali salt I designate salts both of the fixed alkalies and of the volatile alkali, and the particular salt which I prefer to use is the nitrate although I have had a measurable degree of success with such other salts as the phosphate and sulphate. In using ammonium, sodium, or potassium nitrate I have found that 1% is a very satisfactory concentration although I do not limit myself thereto. It appears to be necessary that this third ingredient be preponderant.
The solution is preferably employed hot, even up to the boiling point, and the articles to be treated are immersed therein for a greater or less length of time as determined by the extent of treatment desired which can readily be judged by the eye. The effect of this treatment is to produce upon the surface a mottled, speckled, or spotted appearance, irregular portionsof varying sizes and shapesbein covered with a dense adherent,
dark, deposit intermingled with streaks and ridges of color. In general the more concentrated the solution or the higher the temperature the smaller are the s ots and the finer grained the design; an also the more rapidly the process is performed. Variations in the relative quantities of the ingredients bright and unaffected aluminum Application filed February 19, 1928. Serial No. 87,463.
also affect the size of the grain and the mann nor of the ornamentation. 1n the amount of the fiuo-silicate produces a finer grain and a decrease tends to coarsen the same. .An increase in the amount of the iron grou metal produces a much similar change 0 the graining. The effectof the alkali salt appears more especially to influence the strength or depth of the colorization which becomes faint with low con- Thus an increase centrations and darker and blacker withgreater strengths.
The resulting coating is unaffected by heat and is highly resistant to abrasion even that of a steel brush, the unmodifiedaluminum surface yielding rather than the modified 'or coated portion. By the use of proper concentrations and temperatures the surface can be very thoroughly covered with the coating described. Care however, must be observed not to permit too great proximity between metallic articles receiving simultaneous treatment. Stencils or other protective means can be employed if desired to shield any desired portion against the action of the solution. The solution can be used repeatedly although additions of the several ingredients are required from time to time. Eventually the solution becomes sufiiciently contaminated with impurities, partly dissolved from the articles and partly of accidental entrance so that it must be discarded.
The articles after receiving the treatment hereinbefore described can be subjected, if desired, to further treatments designed to color the unmodified portions, or may be' covered with paint, lacquer, etc, which adheres much more strongly thereto than to the unmodified metal. Alloys of aluminum with other metals.
such as silicon, magnesium, zinc, copper and the like are likewise'susceptible to this process, although in many cases the surface does not exhibit the striking contrast between the color of the modified and unmodified portions which is presented by pure aluminum. For example an alloy of aluminum and silicon treated in this manner exhibits areas of lead color interspersed with areas of a comparatively light grey, the whole resembling marble.
It will be understood that I, do not limit myself to the concentrations herein described nor to the particular salts above enumerated except within the limits specifically indie Within its own class and I do not limit myself except as specifically set forth in my several 7 claims.
Having thus described by invention what I claim is:
1. The process of surface treatin metallic articles consisting at least super cially of aluminum which contains the step of immersing the article in a solution containing a soluble fluo-silicate, a salt of a non-ferrous iron-group metal, and an alkali salt.
2. The process of producing an irregularly mottled aluminum surface which contains the step of subjecting a clean aluminum surface to the simultaneous action of a soluble ac flue-silicate, a salt of a non-ferrous iron group metal, and an alkali nitrate.
3. The process of providing aluminum 4. As a composition of matter, adipping solution for aluminum articles containing a soluble lino-silicate, a soluble metallic salt,
and a neutral alkali salt. 1
. second a metallic salt,and the third a neutral alkali salt.
5. As a composition of matter, a dipping I solution for aluminum articles comprising a soluble flue-silicate, a soluble salt of a nonferrous metal of the iron group, and an alkali nitrate, all dissolved in water.
i In testimony whereof I hereunto afix my signature.
ALADAR PACZ.
US87463A 1926-02-10 1926-02-10 Method and composition of matter for surface-treating aluminum Expired - Lifetime US1638273A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE338925D BE338925A (en) 1926-02-10
US87463A US1638273A (en) 1926-02-10 1926-02-10 Method and composition of matter for surface-treating aluminum
DEP54132D DE480720C (en) 1926-02-10 1926-12-02 Process for providing metal that consists predominantly or entirely of aluminum with an irregularly speckled coating
FR626709D FR626709A (en) 1926-02-10 1926-12-24 Articles of aluminum or aluminum alloys with a decorative appearance, and method of obtaining the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87463A US1638273A (en) 1926-02-10 1926-02-10 Method and composition of matter for surface-treating aluminum

Publications (1)

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US1638273A true US1638273A (en) 1927-08-09

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US87463A Expired - Lifetime US1638273A (en) 1926-02-10 1926-02-10 Method and composition of matter for surface-treating aluminum

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US (1) US1638273A (en)
BE (1) BE338925A (en)
DE (1) DE480720C (en)
FR (1) FR626709A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4650525A (en) * 1984-04-10 1987-03-17 Nihon Parkerizing Co., Ltd. Surface treatment of aluminum and its alloys
US4985087A (en) * 1988-08-10 1991-01-15 Nihon Parkerizing Co., Ltd. Treating zinciferous metal surfaces to blacken them
US5176947A (en) * 1990-12-07 1993-01-05 International Business Machines Corporation Electroerosion printing plates

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764419C (en) * 1937-12-06 1952-01-31 Leonhard Perner Process for producing firmly adhering metal coatings on aluminum and aluminum alloys
US5562950A (en) * 1994-03-24 1996-10-08 Novamax Technologies, Inc. Tin coating composition and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4650525A (en) * 1984-04-10 1987-03-17 Nihon Parkerizing Co., Ltd. Surface treatment of aluminum and its alloys
US4985087A (en) * 1988-08-10 1991-01-15 Nihon Parkerizing Co., Ltd. Treating zinciferous metal surfaces to blacken them
US5176947A (en) * 1990-12-07 1993-01-05 International Business Machines Corporation Electroerosion printing plates

Also Published As

Publication number Publication date
BE338925A (en)
DE480720C (en) 1929-08-08
FR626709A (en) 1927-09-17

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