JPS6456879A - Method for chromating galvanized steel sheet - Google Patents

Method for chromating galvanized steel sheet

Info

Publication number
JPS6456879A
JPS6456879A JP21422687A JP21422687A JPS6456879A JP S6456879 A JPS6456879 A JP S6456879A JP 21422687 A JP21422687 A JP 21422687A JP 21422687 A JP21422687 A JP 21422687A JP S6456879 A JPS6456879 A JP S6456879A
Authority
JP
Japan
Prior art keywords
steel sheet
ions
tervalent
soln
contg
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
JP21422687A
Other languages
Japanese (ja)
Inventor
Shingo Nomura
Katsuhiko Tsuji
Mitsutoshi Sakaguchi
Tadayoshi Kamigaki
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP21422687A priority Critical patent/JPS6456879A/en
Publication of JPS6456879A publication Critical patent/JPS6456879A/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
    • C23C22/05—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 using aqueous solutions
    • C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/34—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
    • C23C22/37—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also hexavalent chromium compounds

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)

Abstract

PURPOSE:To produce the titled steel sheet having superior corrosion resistance by applying an aq. soln. contg. specified amts. of sodium silicofluoride and sodium fluoride basing on the total amt. of hexavalent and tervalent Cr ions including a specified amt. of tervalent Cr ions to a galvanized steel sheet and by drying this steel sheet. CONSTITUTION:An aq. soln. contg. Cr ions composed of hexavalent and tervalent Cr ions and including tervalent Cr ions in 0.3-about 0.5 ratio to the total amt. of the Cr ions and further contg. one or more of silicofluorides of Na, K, NH3, Mg and Ca by 1X10<-3>-1X10<-1>mol. per 1mol. Cr ins and one or more of fluorides or acidic fluorides of NH3, Na and K by 3X10<-3>-5X10<-1>mol. per 1mol. Cr ions is prepd. The aq. soln. is applied to a galvanized steel sheet and this steel sheet is dried without washing. A chromated steel sheet having superior corrosion resistance is obtd. without requiring troublesome control of the treating soln. even in case of long-time continuous treatment.
JP21422687A 1987-08-28 1987-08-28 Method for chromating galvanized steel sheet Pending JPS6456879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21422687A JPS6456879A (en) 1987-08-28 1987-08-28 Method for chromating galvanized steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21422687A JPS6456879A (en) 1987-08-28 1987-08-28 Method for chromating galvanized steel sheet

Publications (1)

Publication Number Publication Date
JPS6456879A true JPS6456879A (en) 1989-03-03

Family

ID=16652285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21422687A Pending JPS6456879A (en) 1987-08-28 1987-08-28 Method for chromating galvanized steel sheet

Country Status (1)

Country Link
JP (1) JPS6456879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7122947B2 (en) 1999-02-25 2006-10-17 Ngk Spark Plug Co., Ltd. Glow plug and spark plug, and manufacturing method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7122947B2 (en) 1999-02-25 2006-10-17 Ngk Spark Plug Co., Ltd. Glow plug and spark plug, and manufacturing method therefor

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