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GB1042589A - Improvements in or relating to insulating coatings for silicon steel - Google Patents

Improvements in or relating to insulating coatings for silicon steel

Info

Publication number
GB1042589A
GB1042589A GB3237864A GB3237864A GB1042589A GB 1042589 A GB1042589 A GB 1042589A GB 3237864 A GB3237864 A GB 3237864A GB 3237864 A GB3237864 A GB 3237864A GB 1042589 A GB1042589 A GB 1042589A
Authority
GB
United Kingdom
Prior art keywords
annealed
strip
silicon steel
silica
cro3
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
GB3237864A
Inventor
Charles Dean Boyer
Clarence Lake Miller
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.)
Allegheny Ludlum Steel Corp
Original Assignee
Allegheny Ludlum Steel 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 Allegheny Ludlum Steel Corp filed Critical Allegheny Ludlum Steel Corp
Priority to GB3237864A priority Critical patent/GB1042589A/en
Publication of GB1042589A publication Critical patent/GB1042589A/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
    • 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
    • C23C24/00—Coating starting from inorganic powder

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

Strip or sheet electrical grade silicon steel, which may have been coated with MgO or CaO powder and annealed in hydrogen at 2000 DEG F to form a complex orthosilicate glass surface, is passed through an aqueous slurry containing 6-23% (all percentages by weight) of colloidal silica, 3-15% of chromium trioxide and a small amount of wetting agent, sodium lauryl sulphate, to form an inorganic insulating film which is dried before baking at 1200-1700 DEG F. The strip then may be annealed in air or in a non oxidizing atmosphere. The deposited film is 0.05-0.12 mils thick and comprises 29-88% silica and 12-71% CrO3.ALSO:Strip or sheet electrical grade silicon steel, which may have been coated with MgO or CaO powder and annealed in hydrogen at 2000 DEG F. to form a complex orthosilicate glass surface, is passed through an aqueous slurry containing 6-23% (all percentages by weight) of colloidal silica, 3-15% of chromium trioxide and a small amount of wetting agent, sodium lauryl sulphate, to form an inorganic insulating film which is dried before baking at 1200-1700 DEG F. The strip then may be annealed in air or a non oxidizing atmosphere. The deposited film is 0.05-0.12 mils thick and comprises 29-88% silica and 12-71% CrO3.
GB3237864A 1964-08-07 1964-08-07 Improvements in or relating to insulating coatings for silicon steel Expired GB1042589A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3237864A GB1042589A (en) 1964-08-07 1964-08-07 Improvements in or relating to insulating coatings for silicon steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3237864A GB1042589A (en) 1964-08-07 1964-08-07 Improvements in or relating to insulating coatings for silicon steel

Publications (1)

Publication Number Publication Date
GB1042589A true GB1042589A (en) 1966-09-14

Family

ID=10337681

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3237864A Expired GB1042589A (en) 1964-08-07 1964-08-07 Improvements in or relating to insulating coatings for silicon steel

Country Status (1)

Country Link
GB (1) GB1042589A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180080127A1 (en) * 2015-03-27 2018-03-22 Jfe Steel Corporation Insulating-coated oriented magnetic steel sheet and method for manufacturing same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180080127A1 (en) * 2015-03-27 2018-03-22 Jfe Steel Corporation Insulating-coated oriented magnetic steel sheet and method for manufacturing same
US10920323B2 (en) * 2015-03-27 2021-02-16 Jfe Steel Corporation Insulating-coated oriented magnetic steel sheet and method for manufacturing same

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