GB986455A - Improvements relating to the chromating of aluminium surfaces - Google Patents

Improvements relating to the chromating of aluminium surfaces

Info

Publication number
GB986455A
GB986455A GB31334/62A GB3133462A GB986455A GB 986455 A GB986455 A GB 986455A GB 31334/62 A GB31334/62 A GB 31334/62A GB 3133462 A GB3133462 A GB 3133462A GB 986455 A GB986455 A GB 986455A
Authority
GB
United Kingdom
Prior art keywords
fluoride
chromating
cro3
aluminium
amino 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
GB31334/62A
Inventor
Dennis Brian Freeman
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.)
Pyrene Co Ltd
Original Assignee
Pyrene Co Ltd
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 BE635940D priority Critical patent/BE635940A/xx
Application filed by Pyrene Co Ltd filed Critical Pyrene Co Ltd
Priority to GB31334/62A priority patent/GB986455A/en
Priority to DEP1271A priority patent/DE1271499B/en
Priority to CH977063A priority patent/CH435913A/en
Priority to FR944064A priority patent/FR1372055A/en
Priority to US301906A priority patent/US3307980A/en
Publication of GB986455A publication Critical patent/GB986455A/en
Expired 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
    • C23C22/05—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
    • C23C22/34—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 fluorides or complex fluorides
    • C23C22/37—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 fluorides or complex fluorides containing also hexavalent chromium compounds

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)

Abstract

A chromate coating is formed on a surface of aluminium or aluminium base alloy by treatment, e.g. spraying at 70-130 DEG F. or immersion, with an aqueous acid solution containing hexavalent chromium ions, e.g. 1-10 g./1. CrO3, and fluoride ions, e.g. 0.05-5 g./1. F, together with an aliphatic a -amino acid in which one or both of the H atoms of the amino group may be substituted, such as glycine, sarcosine or EDTA, e.g. 0.1-10 g./1. Hexavalent chromium may be introduced into solution as CrO3 or a dichromate, e.g. K2Cr2O7, while fluoride may be derived from HF, a simple fluoride, a fluosilicate, e.g. H2SiF6 and/ or a fluoborate, e.g. HBF4. The amino acid may be introduced as such as as an alkali metal salt, e.g. of Na. Specification 846,363 is referred to.
GB31334/62A 1962-08-15 1962-08-15 Improvements relating to the chromating of aluminium surfaces Expired GB986455A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE635940D BE635940A (en) 1962-08-15
GB31334/62A GB986455A (en) 1962-08-15 1962-08-15 Improvements relating to the chromating of aluminium surfaces
DEP1271A DE1271499B (en) 1962-08-15 1963-07-30 Process and solution for applying a chromate coating to surfaces made of aluminum and its alloys
CH977063A CH435913A (en) 1962-08-15 1963-08-07 Method and solution for applying a chromate coating to surfaces made of aluminum and its alloys
FR944064A FR1372055A (en) 1962-08-15 1963-08-07 Aluminum chromating process and resulting products
US301906A US3307980A (en) 1962-08-15 1963-08-13 Treatment of metal surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31334/62A GB986455A (en) 1962-08-15 1962-08-15 Improvements relating to the chromating of aluminium surfaces

Publications (1)

Publication Number Publication Date
GB986455A true GB986455A (en) 1965-03-17

Family

ID=10321589

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31334/62A Expired GB986455A (en) 1962-08-15 1962-08-15 Improvements relating to the chromating of aluminium surfaces

Country Status (5)

Country Link
US (1) US3307980A (en)
BE (1) BE635940A (en)
CH (1) CH435913A (en)
DE (1) DE1271499B (en)
GB (1) GB986455A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3307980A (en) * 1962-08-15 1967-03-07 Hooker Chemical Corp Treatment of metal surfaces
US3519542A (en) * 1964-11-12 1970-07-07 Toyo Kohan Co Ltd Process for treating a cathodically chromated metal surface
GB2215740A (en) * 1988-02-08 1989-09-27 Brent Chemicals Int Composition and process for chromating metal surfaces
AU614024B2 (en) * 1988-02-08 1991-08-15 Brent Chemicals International Plc Composition and process for treating metal surfaces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779815A (en) * 1972-01-03 1973-12-18 Diamond Shamrock Corp Applying chromic acid-amino acid, or lactam, or amide coating compositions to metals
SU384443A1 (en) * 1972-04-05 1977-12-05 Ордена Трудового Красного Знамени Институт Химии И Химической Технологии Ан Литовской Сср Composition for preparing solution passivating the surface of zinc and cadmium

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2322205A (en) * 1939-05-01 1943-06-22 Dow Chemical Co Method of treating magnesium and its alloys
US2522474A (en) * 1942-07-02 1950-09-12 Battelle Memorial Institute Treatment of zinc surfaces
US2438740A (en) * 1944-03-27 1948-03-30 Canadian Copper Refiners Ltd Method of protecting the surface of articles formed from a magnesium alloy
GB577731A (en) * 1944-08-17 1946-05-29 High Duty Alloys Ltd Improved process for protecting magnesium and magnesium rich alloys against corrosion
US2507956A (en) * 1947-11-01 1950-05-16 Lithographic Technical Foundat Process of coating aluminum
US2613165A (en) * 1950-07-03 1952-10-07 Aluminum Co Of America Surface treatment of magnesium and magnesium alloy articles
US2786002A (en) * 1954-04-28 1957-03-19 American Chem Paint Co Method of treating zinciferous surfaces
US2904413A (en) * 1954-06-23 1959-09-15 Jervis Corp Process of bright dipping zinc base alloys
US2844496A (en) * 1957-02-25 1958-07-22 Newell Isaac Laird Formation of corrosion resistant films on aluminum
GB889322A (en) * 1960-11-07 1962-02-14 Pyrene Co Ltd Improvements relating to the chromating of zinc and cadmium
BE635940A (en) * 1962-08-15
GB990352A (en) * 1963-08-15 1965-04-28 Pyrene Co Ltd Improvements relating to the chromating of aluminium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3307980A (en) * 1962-08-15 1967-03-07 Hooker Chemical Corp Treatment of metal surfaces
US3519542A (en) * 1964-11-12 1970-07-07 Toyo Kohan Co Ltd Process for treating a cathodically chromated metal surface
GB2215740A (en) * 1988-02-08 1989-09-27 Brent Chemicals Int Composition and process for chromating metal surfaces
AU614024B2 (en) * 1988-02-08 1991-08-15 Brent Chemicals International Plc Composition and process for treating metal surfaces
GB2215740B (en) * 1988-02-08 1992-06-03 Brent Chemicals Int Composition and process for treating metal surfaces

Also Published As

Publication number Publication date
BE635940A (en)
US3307980A (en) 1967-03-07
DE1271499B (en) 1968-06-27
CH435913A (en) 1967-05-15

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