US2814577A - Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces - Google Patents

Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces Download PDF

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Publication number
US2814577A
US2814577A US586646A US58664656A US2814577A US 2814577 A US2814577 A US 2814577A US 586646 A US586646 A US 586646A US 58664656 A US58664656 A US 58664656A US 2814577 A US2814577 A US 2814577A
Authority
US
United States
Prior art keywords
bath
aluminum
corrosion resistant
color
fluoride
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 - Lifetime
Application number
US586646A
Other languages
English (en)
Inventor
Jr Nelson J Newhard
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.)
Henkel Corp
Original Assignee
Amchem Products 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
Priority to NL210440D priority Critical patent/NL210440A/xx
Application filed by Amchem Products Inc filed Critical Amchem Products Inc
Priority to US586646A priority patent/US2814577A/en
Priority to DEA25536A priority patent/DE1112370B/de
Priority to NL210440A priority patent/NL97942C/nl
Priority to FR1157610D priority patent/FR1157610A/fr
Priority to GB32899/56A priority patent/GB803405A/en
Priority to BE555607D priority patent/BE555607A/xx
Application granted granted Critical
Publication of US2814577A publication Critical patent/US2814577A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C23C22/73—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 characterised by the process
    • C23C22/77—Controlling or regulating of the coating process

Definitions

  • This invention relates to the art of applying a chemically bonded coating to the surface of aluminum or alloys thereof in which aluminum is the principal ingredieat, but before stating the objects of the invention, it is desired to refer briefly to certain coating procedures which are now familiar to those skilled in the art.
  • the present invention is based upon the discovery that, if the maintenance of a set and definite fiuoride:chromate ratio is dispensed with and if, for lack of a better expression what may be termed active fluoride, is kept substantially constant, regardless of the actual fluoride:chromate ratio, the bath will produce corrosion resistant and decorative coatings of uniform color and appearance on a succession of aluminum surfaces. Naturally, the concentration of hexavalent chromium and phosphate or arsenate should be maintained at conventional concentrations by conventional means.
  • active fluoride is used herein to mean the ability of the coating bath to etch a piece of lime soda glass as measured by weight loss.
  • Such a bath is capable of producing a soft green color when used in a dip process at F. with a treating time of approximately 1 /2 minutes.
  • the fluoride activity was measured by immersing a lime soda microscope slide in a part of the bath for /2 hour at a temperature of F.
  • the microscope slide was approximately 4 x 3% inches in size.
  • the fluoride activity caused a loss of 39.5 mgs. of glass.
  • the method of replenishing the solution which includes adding thereto compounds containing chromate ions and ions from the class of phosphates and arsenates sufficient to maintain the required concentrations thereof plus fluoride in suflicient quantity to maintain the fluoride activity of the solution substantially constant as measured by determining the weight loss of a standard piece and type of glass when immersed in the solution for a given period of time at a substantially constant temperature.

Landscapes

  • 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)
US586646A 1956-05-23 1956-05-23 Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces Expired - Lifetime US2814577A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL210440D NL210440A (de) 1956-05-23
US586646A US2814577A (en) 1956-05-23 1956-05-23 Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces
DEA25536A DE1112370B (de) 1956-05-23 1956-08-23 Verfahren zur Erzeugung gleichfoermiger gefaerbter UEberzuege auf Aluminium und dessen Legierungen
NL210440A NL97942C (nl) 1956-05-23 1956-09-07 Werkwijze voor het aanbrengen van gelijkmatige bekledingen op aluminium en legeringen daarvan
FR1157610D FR1157610A (fr) 1956-05-23 1956-09-24 Perfectionnements apportés aux procédés pour obtenir des revêtements uniformes sur l'aluminium et ses alliages
GB32899/56A GB803405A (en) 1956-05-23 1956-10-29 Improvements in or relating to the production of corrosion-resistant coatings on aluminium or aluminium-alloys
BE555607D BE555607A (de) 1956-05-23 1957-03-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US586646A US2814577A (en) 1956-05-23 1956-05-23 Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces

Publications (1)

Publication Number Publication Date
US2814577A true US2814577A (en) 1957-11-26

Family

ID=24346583

Family Applications (1)

Application Number Title Priority Date Filing Date
US586646A Expired - Lifetime US2814577A (en) 1956-05-23 1956-05-23 Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces

Country Status (6)

Country Link
US (1) US2814577A (de)
BE (1) BE555607A (de)
DE (1) DE1112370B (de)
FR (1) FR1157610A (de)
GB (1) GB803405A (de)
NL (2) NL97942C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140245A (en) * 1961-08-23 1964-07-07 Gallaccio Anthony Dulling hard aluminum oxide coatings on aluminum-rich basis metals

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB851027A (en) * 1959-12-17 1960-10-12 Amchem Prod Improvements in or relating to the application of chemically-bonded coatings to the surface of aluminium
US5462634A (en) * 1991-08-23 1995-10-31 Honda Giken Kogyo Kabushiki Kaisha Surface-treated aluminum material and method for its surface treatment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438877A (en) * 1945-09-06 1948-03-30 American Chem Paint Co Composition for and method of coating aluminum
US2679752A (en) * 1949-11-25 1954-06-01 Socony Vacuum Oil Co Inc Method for measuring corrosivity of fluids

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE467610A (de) * 1945-06-30
US2487137A (en) * 1947-09-10 1949-11-08 Armco Steel Corp Producing coatings on metal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438877A (en) * 1945-09-06 1948-03-30 American Chem Paint Co Composition for and method of coating aluminum
US2679752A (en) * 1949-11-25 1954-06-01 Socony Vacuum Oil Co Inc Method for measuring corrosivity of fluids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140245A (en) * 1961-08-23 1964-07-07 Gallaccio Anthony Dulling hard aluminum oxide coatings on aluminum-rich basis metals

Also Published As

Publication number Publication date
BE555607A (de) 1957-03-30
NL210440A (de)
NL97942C (nl) 1961-05-15
FR1157610A (fr) 1958-06-02
DE1112370B (de) 1961-08-03
GB803405A (en) 1958-10-22

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