GB680325A - Improvements in or relating to the production of phosphate coatings on ferrous surfaces - Google Patents

Improvements in or relating to the production of phosphate coatings on ferrous surfaces

Info

Publication number
GB680325A
GB680325A GB29243/48A GB2924348A GB680325A GB 680325 A GB680325 A GB 680325A GB 29243/48 A GB29243/48 A GB 29243/48A GB 2924348 A GB2924348 A GB 2924348A GB 680325 A GB680325 A GB 680325A
Authority
GB
United Kingdom
Prior art keywords
weight
parts
silica
water
composition
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
GB29243/48A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International Co
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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB680325A publication Critical patent/GB680325A/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
    • C23C22/73—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
    • C23C22/74—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 for obtaining burned-in conversion coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/24—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
    • Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Silicon Compounds (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

Ferrous metal surfaces are treated with a composition comprising 100 parts by weight of orthophosphoric acid, 5-55 parts by weight of a silica hydrogel composed of particles substantially all of which are 1-20 microns in diameter, and 7-15 parts by weight of water for each part of silica, the maximum water content not exceeding 600 parts by weight, the composition being applied to provide 0.5lbs. of silica for each 300 sq. ft. of surface; the surfaces are subsequently heated at 300-950 DEG C to drive off water and cause reaction with the ferrous metal. A silica hydrosol, formed by mixing sodium silicate having a SiO2 : Na2O ratio of 3-3.5 with an equimolecular proportion or slight excess of sulphuric acid, is allowed to age, the hydrogel formed being broken up, washed and passed through a colloid or ball mill with additional water; 0.001 per cent of ammonia may be added as a stabilizer. Specifications 560,667, [Group XXXVI], and 639,844 are referred to.ALSO:Ferrous metal surfaces are treated with a composition comprising 100 parts by weight of orthophosphoric acid, 5-55 parts by weight of a silica hydrogel composed of microns in diameter, and 7-15 parts by particles substantially all of which are 1-20 weight of water for each part of silica, the maximum water content not exceeding 600 parts by weight, the composition being applied to provide 0.5-5 lbs. of silica for each 300 sq. ft. of surface; the surfaces are subsequently heated at 300-900 DEG C to drive off water and to cause reaction with the ferrous metal. Specifications 560,667, [Group XXXVI], and 639,844 are referred to.
GB29243/48A 1947-12-11 1948-11-10 Improvements in or relating to the production of phosphate coatings on ferrous surfaces Expired GB680325A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US791168A US2554250A (en) 1947-12-11 1947-12-11 Insulating compositions for laminations and product produced therewith

Publications (1)

Publication Number Publication Date
GB680325A true GB680325A (en) 1952-10-01

Family

ID=25152875

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29243/48A Expired GB680325A (en) 1947-12-11 1948-11-10 Improvements in or relating to the production of phosphate coatings on ferrous surfaces

Country Status (3)

Country Link
US (1) US2554250A (en)
FR (1) FR976367A (en)
GB (1) GB680325A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809907A (en) * 1953-04-17 1957-10-15 Parker Rust Proof Co Vitreous enameling
US2753282A (en) * 1953-07-27 1956-07-03 Allegheny Ludlum Steel Method of forming insulating coat on steel and composition therefor
US2790739A (en) * 1953-12-07 1957-04-30 United States Steel Corp Method of coating core plates and composition therefor
US2811473A (en) * 1953-12-07 1957-10-29 United States Steel Corp Composition and method for increasing surface resistivity of silicon steel
US2835618A (en) * 1954-03-09 1958-05-20 Parker Rust Proof Co Solution and method for producing heat resistant electrical insulation coatings on ferrous surfaces
US2809137A (en) * 1954-12-02 1957-10-08 Gen Electric Insulating coating for magnetic sheet material and method of making the same
US2979430A (en) * 1955-06-04 1961-04-11 Parker Rust Proof Co Heat resistant phosphate coatings, methods and articles produced therefrom
US2926123A (en) * 1956-03-30 1960-02-23 Sidney L Simon Temperature reducing coating for metals subject to flame exposure
US2837122A (en) * 1956-06-28 1958-06-03 Ungethuem Method of reducing leaks in conduits
US3104993A (en) * 1960-09-20 1963-09-24 Inland Steel Co Galvanizing process
US3144364A (en) * 1960-11-14 1964-08-11 Westinghouse Electric Corp Induction annealing of magnetic alloy sheet
US3138492A (en) * 1961-10-11 1964-06-23 Allegheny Ludlum Steel Insulating coating for magnetic steel
US3522113A (en) * 1968-01-02 1970-07-28 Armco Steel Corp Potassium silicate coated silicon steel article
US3996073A (en) * 1974-10-11 1976-12-07 Armco Steel Corporation Insulative coating for electrical steels
US3948786A (en) * 1974-10-11 1976-04-06 Armco Steel Corporation Insulative coating for electrical steels
DE3319847A1 (en) * 1983-06-01 1984-12-06 Ruhrgas Ag, 4300 Essen Process for producing laminated cores from unsiliconised grades for the field-carrying parts of electrical machines and apparatus
US6455100B1 (en) 1999-04-13 2002-09-24 Elisha Technologies Co Llc Coating compositions for electronic components and other metal surfaces, and methods for making and using the compositions
EP1546438A2 (en) * 2002-09-23 2005-06-29 Elisha Holding LLC Coating compositions for electronic components and other metal surfaces, and methods for making and using the compositions

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1750270A (en) * 1927-06-13 1930-03-11 Parker Rust Proof Co Coated iron and steel articles and method of making the same
BE356718A (en) * 1928-12-18 1929-01-31 La Societe Continentale Parker PROCESS FOR SURFACE COATING OF IRON OR STEEL OBJECTS
US1850726A (en) * 1931-05-20 1932-03-22 Gen Electric Laminated core structure
US2030601A (en) * 1934-04-20 1936-02-11 Victor Chemical Works Rustproofing composition and method of coating iron and steel
US2413949A (en) * 1942-12-23 1947-01-07 Gen Electric Treating silicon steel strip
US2492095A (en) * 1946-11-01 1949-12-20 Armco Steel Corp Production of silicon steel sheet stock having high surface resistivity and resistance to adhesion

Also Published As

Publication number Publication date
US2554250A (en) 1951-05-22
FR976367A (en) 1951-03-16

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