GB720050A - Corrosion-resistant coatings on copper infiltrated ferrous skeleton bodies - Google Patents

Corrosion-resistant coatings on copper infiltrated ferrous skeleton bodies

Info

Publication number
GB720050A
GB720050A GB14988/52A GB1498852A GB720050A GB 720050 A GB720050 A GB 720050A GB 14988/52 A GB14988/52 A GB 14988/52A GB 1498852 A GB1498852 A GB 1498852A GB 720050 A GB720050 A GB 720050A
Authority
GB
United Kingdom
Prior art keywords
chromium
copper
corrosion
treatment
resistant coatings
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
GB14988/52A
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.)
American Electro Metal Corp
Original Assignee
American Electro Metal Corp
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 American Electro Metal Corp filed Critical American Electro Metal Corp
Publication of GB720050A publication Critical patent/GB720050A/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
    • C23C10/02—Pretreatment of the material to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F3/26—Impregnating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Powder Metallurgy (AREA)

Abstract

A method of producing a corrosion-resistant coating on a ferrous skeleton with a copper infiltrant comprises removing the copper from a thin surface layer, preferably less than 0.001 inch thick, and then depositing chromium from a chromium-containing substance on to the surface. The heat treatment of the body at 870 DEG C. in an atmosphere of cracked ammonia followed by quenching and precipitation hardening at 500 DEG C. is described, after which copper is removed by immersion in a chromic acid or cyanamide solution, and chromium deposited, for example by treatment with a chromium halide at 900-1200 DEG C. or by the use of a chromizing pack of aluminium oxide, chromium and methyl alcohol at about 950 DEG C., or 1100 DEG C. if diffusion of the chromium into the body is desired. The chromizing pack may also contain ferro-columbium and/or titanium hydride. The treatment of jet-engine compressor blades is described and illustrated. U.S.A. Specification 2,566,752 is referred to.
GB14988/52A 1951-06-13 1952-06-13 Corrosion-resistant coatings on copper infiltrated ferrous skeleton bodies Expired GB720050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US720050XA 1951-06-13 1951-06-13

Publications (1)

Publication Number Publication Date
GB720050A true GB720050A (en) 1954-12-08

Family

ID=22104951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14988/52A Expired GB720050A (en) 1951-06-13 1952-06-13 Corrosion-resistant coatings on copper infiltrated ferrous skeleton bodies

Country Status (1)

Country Link
GB (1) GB720050A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120436A (en) * 1961-03-23 1964-02-04 Presmet Corp Powdered metal article and method of making
US3414391A (en) * 1963-12-13 1968-12-03 Porter Prec Products Inc Ferrous die element formed of powdered metal impregnated with copper
US3623630A (en) * 1969-04-29 1971-11-30 John E Rode Infiltrated powdered metal cooking utensil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120436A (en) * 1961-03-23 1964-02-04 Presmet Corp Powdered metal article and method of making
US3414391A (en) * 1963-12-13 1968-12-03 Porter Prec Products Inc Ferrous die element formed of powdered metal impregnated with copper
US3623630A (en) * 1969-04-29 1971-11-30 John E Rode Infiltrated powdered metal cooking utensil

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