JPS54133439A - Forming method for insulating film on surface of electrical sheet - Google Patents

Forming method for insulating film on surface of electrical sheet

Info

Publication number
JPS54133439A
JPS54133439A JP4158178A JP4158178A JPS54133439A JP S54133439 A JPS54133439 A JP S54133439A JP 4158178 A JP4158178 A JP 4158178A JP 4158178 A JP4158178 A JP 4158178A JP S54133439 A JPS54133439 A JP S54133439A
Authority
JP
Japan
Prior art keywords
sheet
film
parts
electrical sheet
insulating film
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.)
Pending
Application number
JP4158178A
Other languages
Japanese (ja)
Inventor
Minoru Kitayama
Motoharu Nakamura
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.)
Nippon Steel Corp
Original Assignee
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP4158178A priority Critical patent/JPS54133439A/en
Publication of JPS54133439A publication Critical patent/JPS54133439A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To form film which is uniformly coated and which causes no burning during stress-relieving annealing, no peeling of film, and no carburizing, by applying a prescribed amount of a mixt. contg. limited quantity of phosphoric acid, chromic acid, Mg cpd. as essential components to electrical sheet, and by baking it. CONSTITUTION:Electrical sheet is applied with 0.5-2.5 g/cm<2> of a soln. of a mixt. consisting of, as essential components, 10-25 parts chromic anhydride, 15-25 parts Mg cpd. (as MgO) based on 100 wt. parts phosphoric acid (as 100 % H3PO4) on the surface. Then the sheet is baked at a sheet-temp. of 350-600 deg.C. This method yield an insulating film which is excellent in combined characteristics, i.e., excellent in uniform coating property and layer resistance, causing no trouble due to powder formation, no stickiness because it is insolubilized, no burning in stress-relieving annealing, no peeling of the film, and no carburizing.
JP4158178A 1978-04-08 1978-04-08 Forming method for insulating film on surface of electrical sheet Pending JPS54133439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4158178A JPS54133439A (en) 1978-04-08 1978-04-08 Forming method for insulating film on surface of electrical sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4158178A JPS54133439A (en) 1978-04-08 1978-04-08 Forming method for insulating film on surface of electrical sheet

Publications (1)

Publication Number Publication Date
JPS54133439A true JPS54133439A (en) 1979-10-17

Family

ID=12612401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4158178A Pending JPS54133439A (en) 1978-04-08 1978-04-08 Forming method for insulating film on surface of electrical sheet

Country Status (1)

Country Link
JP (1) JPS54133439A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58103107A (en) * 1981-12-16 1983-06-20 Kawasaki Steel Corp Formation of insulating film for electromagnetic steel plate
JPS6056071A (en) * 1983-09-08 1985-04-01 Nippon Steel Corp Surface treatment of amorphous magnetic steel strip

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS496746A (en) * 1972-05-08 1974-01-21
JPS5217503A (en) * 1975-08-01 1977-02-09 Hitachi Ltd Apparatus for trapping fuel vapor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS496746A (en) * 1972-05-08 1974-01-21
JPS5217503A (en) * 1975-08-01 1977-02-09 Hitachi Ltd Apparatus for trapping fuel vapor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58103107A (en) * 1981-12-16 1983-06-20 Kawasaki Steel Corp Formation of insulating film for electromagnetic steel plate
JPS6222241B2 (en) * 1981-12-16 1987-05-16 Kawasaki Steel Co
JPS6056071A (en) * 1983-09-08 1985-04-01 Nippon Steel Corp Surface treatment of amorphous magnetic steel strip

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