FR2172902A1 - Blackening bath - contains iron sequesterant to give intense black oxide coating on ferrous metal - Google Patents

Blackening bath - contains iron sequesterant to give intense black oxide coating on ferrous metal

Info

Publication number
FR2172902A1
FR2172902A1 FR7206539A FR7206539A FR2172902A1 FR 2172902 A1 FR2172902 A1 FR 2172902A1 FR 7206539 A FR7206539 A FR 7206539A FR 7206539 A FR7206539 A FR 7206539A FR 2172902 A1 FR2172902 A1 FR 2172902A1
Authority
FR
France
Prior art keywords
sequesterant
ferrous metal
oxide coating
derivs
contains iron
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.)
Withdrawn
Application number
FR7206539A
Other languages
French (fr)
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.)
Oxford Chemicals Inc
Original Assignee
Oxford Chemicals Inc
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 Oxford Chemicals Inc filed Critical Oxford Chemicals Inc
Priority to FR7206539A priority Critical patent/FR2172902A1/en
Publication of FR2172902A1 publication Critical patent/FR2172902A1/en
Withdrawn legal-status Critical Current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
    • C23C22/60—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 alkaline aqueous solutions with pH greater than 8
    • C23C22/62—Treatment of iron or alloys based thereon

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)
  • Paints Or Removers (AREA)

Abstract

Bath has compsn. (by wt) - 32-55% alkali metal hydroxide, 1-8% alkali metal nitrite, 0.5-6% alkali metal nitrate, 0.05-10% iron sequestrant, bal. water, the sequestrant being chosen from alcohol amines, sorbitol and its derivs, metal gluconates and derivs, metal nitriloacetates and derivs. Pref. sequestrants are triethanolamine and sodium (hepta)gluconate used in amts. 0.05-2%. The sequestrants can be used to regenerate spent baths and gives increased corrosion resistance of coatings, lower operating temps. and ability to coat a wide range of alloys.
FR7206539A 1972-02-25 1972-02-25 Blackening bath - contains iron sequesterant to give intense black oxide coating on ferrous metal Withdrawn FR2172902A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7206539A FR2172902A1 (en) 1972-02-25 1972-02-25 Blackening bath - contains iron sequesterant to give intense black oxide coating on ferrous metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7206539A FR2172902A1 (en) 1972-02-25 1972-02-25 Blackening bath - contains iron sequesterant to give intense black oxide coating on ferrous metal

Publications (1)

Publication Number Publication Date
FR2172902A1 true FR2172902A1 (en) 1973-10-05

Family

ID=9094177

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7206539A Withdrawn FR2172902A1 (en) 1972-02-25 1972-02-25 Blackening bath - contains iron sequesterant to give intense black oxide coating on ferrous metal

Country Status (1)

Country Link
FR (1) FR2172902A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115433930A (en) * 2022-07-06 2022-12-06 南通群安电子材料有限公司 Phosphorus-free blackening solution for copper metal grid conductive film and preparation and use methods thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115433930A (en) * 2022-07-06 2022-12-06 南通群安电子材料有限公司 Phosphorus-free blackening solution for copper metal grid conductive film and preparation and use methods thereof
CN115433930B (en) * 2022-07-06 2023-11-28 南通群安电子材料有限公司 Non-phosphorus blackening liquid for copper metal grid conductive film and preparation and use methods thereof

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Legal Events

Date Code Title Description
ST Notification of lapse