JPS6487783A - Production of surface-treated steel sheet having two chromate-layer coating film - Google Patents

Production of surface-treated steel sheet having two chromate-layer coating film

Info

Publication number
JPS6487783A
JPS6487783A JP24407587A JP24407587A JPS6487783A JP S6487783 A JPS6487783 A JP S6487783A JP 24407587 A JP24407587 A JP 24407587A JP 24407587 A JP24407587 A JP 24407587A JP S6487783 A JPS6487783 A JP S6487783A
Authority
JP
Japan
Prior art keywords
steel sheet
resin
inorg
contg
soln
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.)
Granted
Application number
JP24407587A
Other languages
Japanese (ja)
Other versions
JPH0372714B2 (en
Inventor
Yukinobu Higuchi
Kenichi Asakawa
Hirobumi Nakano
Keizo Oshiba
Ryusuke Inoue
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.)
Nihon Parkerizing Co Ltd
Nippon Steel Corp
Original Assignee
Nihon Parkerizing Co Ltd
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 Nihon Parkerizing Co Ltd, Nippon Steel Corp filed Critical Nihon Parkerizing Co Ltd
Priority to JP24407587A priority Critical patent/JPS6487783A/en
Publication of JPS6487783A publication Critical patent/JPS6487783A/en
Publication of JPH0372714B2 publication Critical patent/JPH0372714B2/ja
Granted 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
    • C23C22/76—Applying the liquid by spraying

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 title steel sheet having beautiful appearance, uniformly coated, and having excellent corrosion resistance and coating performance by applying an inorg. chromating layer and a coating layer thereon by the electrostatic atomization of a Cr-contg. resin soln. having specified composition, viscosity, and electrical conductivity in a specified quantity, and heating the layers. CONSTITUTION:An inorg. chromating layer is provided on a surface-treated steel sheet at 5-150mg/m<2> per one side, expressed in terms of the metallic Cr, by the electrolysis or coating of the aq. soln. of an inorg. Cr compd. consisting essentially of Cr<6+>. A soln. contg. 50-400g/l resin and a Cr component whose ratio to the resin is controlled to 1/50-1/1 and having 3-50 centipoise viscosity and 2-30ms/cm electrical conductivity is applied on the chromating layer by electrostatic atomization. In this case, the resin-contg. chromating layer is provided at the Cr deposition rate of 3-180mg/m<2> per one side, and then heated at 50-350 deg.C.
JP24407587A 1987-09-30 1987-09-30 Production of surface-treated steel sheet having two chromate-layer coating film Granted JPS6487783A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24407587A JPS6487783A (en) 1987-09-30 1987-09-30 Production of surface-treated steel sheet having two chromate-layer coating film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24407587A JPS6487783A (en) 1987-09-30 1987-09-30 Production of surface-treated steel sheet having two chromate-layer coating film

Publications (2)

Publication Number Publication Date
JPS6487783A true JPS6487783A (en) 1989-03-31
JPH0372714B2 JPH0372714B2 (en) 1991-11-19

Family

ID=17113362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24407587A Granted JPS6487783A (en) 1987-09-30 1987-09-30 Production of surface-treated steel sheet having two chromate-layer coating film

Country Status (1)

Country Link
JP (1) JPS6487783A (en)

Also Published As

Publication number Publication date
JPH0372714B2 (en) 1991-11-19

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