GB952573A - Protective coating for aluminium - Google Patents

Protective coating for aluminium

Info

Publication number
GB952573A
GB952573A GB611662A GB611662A GB952573A GB 952573 A GB952573 A GB 952573A GB 611662 A GB611662 A GB 611662A GB 611662 A GB611662 A GB 611662A GB 952573 A GB952573 A GB 952573A
Authority
GB
United Kingdom
Prior art keywords
aluminium
polytetrafluoroethylene
nickel
hydrochloric acid
articles
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
GB611662A
Inventor
Stanley Francis Robinson
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB611662A priority Critical patent/GB952573A/en
Publication of GB952573A publication Critical patent/GB952573A/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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/16—Acidic compositions
    • C23F1/20—Acidic compositions for etching aluminium or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
    • B05D5/086—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers having an anchoring layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2350/00—Pretreatment of the substrate
    • B05D2350/30—Change of the surface
    • B05D2350/33—Roughening
    • B05D2350/35—Roughening by chemical means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • ing And Chemical Polishing (AREA)
  • Chemically Coating (AREA)

Abstract

Articles of aluminium are etched prior to coating with polytetrafluoroethylene by treatment with a hydrochloric acid solution containing a salt of manganese, cobalt, nickel or tin. In an example the etching bath comprises 120 gm. of nickel chloride per litre of 10% hydrochloric acid; it is postulated that a porous deposit of nickel is formed on the aluminium.ALSO:Aluminium articles are etched by a hydrochloric acid bath containing a salt of manganese, cobalt, nickel or tin, then coated by applying an aqueous suspension of polytetrafluoroethylene by pouring, spraying or flowing; the water is evaporated and the article heated to sinter the polytetrafluoroethylene on the surface. The articles may first be cleaned. In an example a solution of nickel chloride in hydrochloric acid is used as etchant. Aluminium discs may be coated, while rotating, by pouring on a dispersion of polytetrafluoroethylene, any excess being thrown off by centrifugal force.
GB611662A 1962-02-16 1962-02-16 Protective coating for aluminium Expired GB952573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB611662A GB952573A (en) 1962-02-16 1962-02-16 Protective coating for aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB611662A GB952573A (en) 1962-02-16 1962-02-16 Protective coating for aluminium

Publications (1)

Publication Number Publication Date
GB952573A true GB952573A (en) 1964-03-18

Family

ID=9808678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB611662A Expired GB952573A (en) 1962-02-16 1962-02-16 Protective coating for aluminium

Country Status (1)

Country Link
GB (1) GB952573A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051222A1 (en) * 2000-01-14 2001-07-19 Astrazeneca Ab A method for applying a polymer coating to the internal surface of a container

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051222A1 (en) * 2000-01-14 2001-07-19 Astrazeneca Ab A method for applying a polymer coating to the internal surface of a container
AU783070B2 (en) * 2000-01-14 2005-09-22 Astrazeneca Ab A method for applying a polymer coating to the internal surface of a container
US7205026B2 (en) 2000-01-14 2007-04-17 Astrazeneca Ab Method for applying a polymer coating to the internal surface of a container
KR100804382B1 (en) 2000-01-14 2008-02-15 아스트라제네카 아베 A method for applying a polymer coating to the internal surface of a container

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