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GB781594A - A process for coating metals - Google Patents

A process for coating metals

Info

Publication number
GB781594A
GB781594A GB2939754A GB2939754A GB781594A GB 781594 A GB781594 A GB 781594A GB 2939754 A GB2939754 A GB 2939754A GB 2939754 A GB2939754 A GB 2939754A GB 781594 A GB781594 A GB 781594A
Authority
GB
United Kingdom
Prior art keywords
chromium
coating
metal
silicate
cryolite
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
GB2939754A
Inventor
Robert Lionel Samuel
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.)
Diffusion Alloys Ltd
Original Assignee
Diffusion Alloys 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 Diffusion Alloys Ltd filed Critical Diffusion Alloys Ltd
Priority to GB2939754A priority Critical patent/GB781594A/en
Publication of GB781594A publication Critical patent/GB781594A/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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

A metal is provided with a chromium-containing coating by being first coated with a liquid or pasty composition containing chromium or chromium alloy in powder form, together with a carrier which is solid at room temperature but becomes liquid or begins to melt at the operating temperature, and which is a halide other than a chromium halide, and then heated by high frequency heating until diffusion of chromium takes place. The metal to be coated may be aluminium, copper, cobalt, iron, steel, nickel, molybdenum, tungsten or titanium. The coating may contain, besides chromium, aluminium, copper, cadmium, iron, manganese, molydbenum, titanium, vanadium, tungsten, zirconium, silicon, nickel or cobalt. Carriers which may be used are cryolite and alkali metal or alkaline earth metal fluorides, chlorides, bromides and iodides, e.g. flourspar, potassium iodide and barium chrolide. The composition may also contain a bonding agent such as an organic silicate, e.g. ethyl silicate, a complex silicate, e.g. Portland cement, solutions of cryolite cellulose esters or ethers, e.g. cellulose acetate, or organic colloidal substances, e.g. glue or gelatine. The heating is effected in an induction furnace or by means of a high-frequency inductor: atmosphere-controlled furnaces may be used as well as gas-tight retorts or boxes, or salt-bath furnaces. Two examples described relate (a) to the coating of a sparking plug made of medium carbon steel, and (b) to the coating of a molybdenum rod. Specification 718,095 is referred to.
GB2939754A 1954-10-12 1954-10-12 A process for coating metals Expired GB781594A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2939754A GB781594A (en) 1954-10-12 1954-10-12 A process for coating metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2939754A GB781594A (en) 1954-10-12 1954-10-12 A process for coating metals

Publications (1)

Publication Number Publication Date
GB781594A true GB781594A (en) 1957-08-21

Family

ID=10290928

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2939754A Expired GB781594A (en) 1954-10-12 1954-10-12 A process for coating metals

Country Status (1)

Country Link
GB (1) GB781594A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2986808A (en) * 1958-08-04 1961-06-06 Armco Steel Corp Steel body having alloyed zinc coating and method of producing such coating
EP1270089A1 (en) * 2001-06-29 2003-01-02 Kabushiki Kaisha Yoshino Kosakujo Apparatus and method for powder coating with induction heating
GB2394478A (en) * 2002-10-21 2004-04-28 Rolls Royce Plc Method of forming a diffusion barrier on a metallic substrate
US6797066B2 (en) 2000-10-24 2004-09-28 Kabushiki Kaisya Yoshino Kosakujo Apparatus and method for powder coating

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2986808A (en) * 1958-08-04 1961-06-06 Armco Steel Corp Steel body having alloyed zinc coating and method of producing such coating
US6797066B2 (en) 2000-10-24 2004-09-28 Kabushiki Kaisya Yoshino Kosakujo Apparatus and method for powder coating
EP1270089A1 (en) * 2001-06-29 2003-01-02 Kabushiki Kaisha Yoshino Kosakujo Apparatus and method for powder coating with induction heating
GB2394478A (en) * 2002-10-21 2004-04-28 Rolls Royce Plc Method of forming a diffusion barrier on a metallic substrate
GB2394478B (en) * 2002-10-21 2004-10-20 Rolls Royce Plc Method of forming a diffusion barrier on a metallic substrate

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