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JPS648278A - Chromate treatment - Google Patents

Chromate treatment

Info

Publication number
JPS648278A
JPS648278A JP15965187A JP15965187A JPS648278A JP S648278 A JPS648278 A JP S648278A JP 15965187 A JP15965187 A JP 15965187A JP 15965187 A JP15965187 A JP 15965187A JP S648278 A JPS648278 A JP S648278A
Authority
JP
Japan
Prior art keywords
compd
copper
phosphoric
chromate treatment
metal
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
JP15965187A
Other languages
Japanese (ja)
Inventor
Mitsuo Suzuki
Muneharu Ohara
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.)
Mitsui Mining and Smelting Co Ltd
Original Assignee
Mitsui Mining and Smelting Co 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 Mitsui Mining and Smelting Co Ltd filed Critical Mitsui Mining and Smelting Co Ltd
Priority to JP15965187A priority Critical patent/JPS648278A/en
Publication of JPS648278A publication Critical patent/JPS648278A/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
    • C23C22/24—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 hexavalent chromium compounds
    • C23C22/33—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 hexavalent chromium compounds containing also phosphates

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 form a chromate film excellent in corrosion resistance and electric conductivity at ordinary temp. by treating the surface of metal or metallic alloy with chromate treatment liquid contg. chromium compd. phosphoric compd. and copper compd. CONSTITUTION:The surface of metal or metallic alloy is treated with chromate treatment liquid contg. chromium compd., phosphoric compd. and copper compd. as an essential component. As the above-mentioned chromium compd., about 0.1-3.0g/l chromic acid anhydride or about 0.2-6.0g/l dischromate is used. Further as phosphoric compds., phosphoric acid or sodium hydrogenphosphate, etc., is used and concn. of about 0.005-2.0g/l phosphate ion is suitable. As copper compd., copper oxide or copper carbonate, etc., is used and concn. of about 0.1-3.0g/l copper ion is suitable. pH of the chromate treatment liquid is properly regulated to 2.0 or more and a material to be treated which has metal or metallic alloy e.g. copper or copper alloy at least on the outer surface is immersed therein at about 20-50 deg.C treatment temp. and thereafter it is washed with water and dried.
JP15965187A 1987-06-29 1987-06-29 Chromate treatment Pending JPS648278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15965187A JPS648278A (en) 1987-06-29 1987-06-29 Chromate treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15965187A JPS648278A (en) 1987-06-29 1987-06-29 Chromate treatment

Publications (1)

Publication Number Publication Date
JPS648278A true JPS648278A (en) 1989-01-12

Family

ID=15698366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15965187A Pending JPS648278A (en) 1987-06-29 1987-06-29 Chromate treatment

Country Status (1)

Country Link
JP (1) JPS648278A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999028536A1 (en) * 1997-12-03 1999-06-10 Toto Ltd. Method of reducing elution of lead in lead-containing copper alloy, and city water service fittings made of lead-containing copper alloy
CN105441918A (en) * 2015-10-26 2016-03-30 安徽长安专用汽车制造有限公司 Automobile copper alloy passivation process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999028536A1 (en) * 1997-12-03 1999-06-10 Toto Ltd. Method of reducing elution of lead in lead-containing copper alloy, and city water service fittings made of lead-containing copper alloy
US6656294B1 (en) 1997-12-03 2003-12-02 Toto Ltd. Method of reducing elution of lead in lead-containing copper alloy, and drinking water service fittings made of lead-containing copper alloy
CN105441918A (en) * 2015-10-26 2016-03-30 安徽长安专用汽车制造有限公司 Automobile copper alloy passivation process

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