GB327615A - Improvements in processes for the blackening, by oxidation, of iron and steel, and articles thereof - Google Patents

Improvements in processes for the blackening, by oxidation, of iron and steel, and articles thereof

Info

Publication number
GB327615A
GB327615A GB1508229A GB1508229A GB327615A GB 327615 A GB327615 A GB 327615A GB 1508229 A GB1508229 A GB 1508229A GB 1508229 A GB1508229 A GB 1508229A GB 327615 A GB327615 A GB 327615A
Authority
GB
United Kingdom
Prior art keywords
iron
bath
weight
parts
potassium
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.)
Expired
Application number
GB1508229A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1508229A priority Critical patent/GB327615A/en
Publication of GB327615A publication Critical patent/GB327615A/en
Expired 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)

Abstract

327,615. Taricco, L. May 14, 1929. Coating.-In a process for blackening iron or steel or articles thereof by oxidation, the iron &c. is immersed in a bath of a hot alkaline solution of potassium cyanate, produced by the action of litharge upon potassium cyanide in a solution of sodium or potassium hydrate. The constitution of the bath is as follows :-Potassium hydrate, 35.85 parts by weight; water, 39.82 parts by weight; potassium cyanide, 2.12 parts by weight; litharge, 22.21 parts by weight. The bath has a working temperature of 125-127‹ C., and should the temperature rise through increase of concentration, water must be added. The bath is regenerated by the addition of litharge.
GB1508229A 1929-05-14 1929-05-14 Improvements in processes for the blackening, by oxidation, of iron and steel, and articles thereof Expired GB327615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1508229A GB327615A (en) 1929-05-14 1929-05-14 Improvements in processes for the blackening, by oxidation, of iron and steel, and articles thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1508229A GB327615A (en) 1929-05-14 1929-05-14 Improvements in processes for the blackening, by oxidation, of iron and steel, and articles thereof

Publications (1)

Publication Number Publication Date
GB327615A true GB327615A (en) 1930-04-10

Family

ID=10052696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1508229A Expired GB327615A (en) 1929-05-14 1929-05-14 Improvements in processes for the blackening, by oxidation, of iron and steel, and articles thereof

Country Status (1)

Country Link
GB (1) GB327615A (en)

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