US1105251A - Method of oxidizing steel or iron sheets. - Google Patents

Method of oxidizing steel or iron sheets. Download PDF

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Publication number
US1105251A
US1105251A US77248913A US1913772489A US1105251A US 1105251 A US1105251 A US 1105251A US 77248913 A US77248913 A US 77248913A US 1913772489 A US1913772489 A US 1913772489A US 1105251 A US1105251 A US 1105251A
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Prior art keywords
sheets
oxidizing
iron sheets
steel
steam
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US77248913A
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John E Carnahan
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    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising
    • C23C8/16—Oxidising using oxygen-containing compounds, e.g. water, carbon dioxide
    • C23C8/18—Oxidising of ferrous surfaces

Definitions

  • the invention relates to the oxidation of the surface of steel or iron sheets for the purpose of giving them a deeply oxidized hard and uniform dark blue finish.
  • Ordinary oxidation by air gives such sheets a deeply oxidized hard light blue finish, which is not always uniform throughout the surface, while ordinary oxidation by steam gives a superficially oxidized soft and dark blue finish.
  • the object of the present invention is attained by first oxidizing the surface of the sheets by an air oxidizing process and then uniformly darkening the color thereof by a steam oxidizing process.
  • the improved process may be performed by first heating the sheets in an annealing box to an annealing heat and then separately exposing the heated sheets to the air, which deeply oxidizes the surfaces and gives them a hard finish with a light blue color, which hardness and color are, however, not always uniform throughout the surface of the sheets.
  • the sheets are then again heated in Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,
  • an annealing box to a dark red temperature, that is to say, to a degree which will not decompose the air-formed oxidation thereon, after whichthe sheets are permitted to cool while in the annealing box.
  • Steam is introduced into the annealing box while the sheets are thus heated, and also while they are cooling; and it has been found that the further oxidation caused bv the steam not only darkens the blue color of the air oxidation, but renders uniform the varying color which has been produced by the previous processes.
  • the action of the steam furthermore, serves to soften any excessive hardness of the oxidation, which may have been Patented July 28, 1914:.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Description

JOHN E. CARNAHAN, 0F CANTON, OHIO.
METHOD OF OXIDIZING- STEEL 0R IRON SHEETS.
No Drawing.
Specification of Letters Patent.
Application filed June 9, 1913. Serial No. 772,489.
To all whom it may concern:
Be it known that I, JOHN E. GA NAHAN, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a certain new and useful Method of Oxidizing Steel or Iron Sheets, of which the following is a specification.
The invention relates to the oxidation of the surface of steel or iron sheets for the purpose of giving them a deeply oxidized hard and uniform dark blue finish. Ordinary oxidation by air gives such sheets a deeply oxidized hard light blue finish, which is not always uniform throughout the surface, while ordinary oxidation by steam gives a superficially oxidized soft and dark blue finish.
The object of the present invention is attained by first oxidizing the surface of the sheets by an air oxidizing process and then uniformly darkening the color thereof by a steam oxidizing process.
The improved process may be performed by first heating the sheets in an annealing box to an annealing heat and then separately exposing the heated sheets to the air, which deeply oxidizes the surfaces and gives them a hard finish with a light blue color, which hardness and color are, however, not always uniform throughout the surface of the sheets. The sheets are then again heated in Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,
an annealing box to a dark red temperature, that is to say, to a degree which will not decompose the air-formed oxidation thereon, after whichthe sheets are permitted to cool while in the annealing box. Steam is introduced into the annealing box while the sheets are thus heated, and also while they are cooling; and it has been found that the further oxidation caused bv the steam not only darkens the blue color of the air oxidation, but renders uniform the varying color which has been produced by the previous processes. The action of the steam, furthermore, serves to soften any excessive hardness of the oxidation, which may have been Patented July 28, 1914:.
caused by the previousprocesses, especially along and near the edges of the sheets; thus producing a sheet which will not crack or scale in the ordinarystamping, bending and drawing processes used in the various arts.
I claim:
The process of oxidizing steel or iron sheets consisting in first bluing the sheets by an oxidizing process, then heating the sheets in an annealing box to a dark red and introducing steam into the annealing box and cooling the sheets therein in the presence of the steam. v
J OHN E. GARNAHAN. WVitnesses: v
ELFRIEDE ScHMIoT,
E. S. HAL
Washington, D. 0.
US77248913A 1913-06-09 1913-06-09 Method of oxidizing steel or iron sheets. Expired - Lifetime US1105251A (en)

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US77248913A US1105251A (en) 1913-06-09 1913-06-09 Method of oxidizing steel or iron sheets.

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US77248913A US1105251A (en) 1913-06-09 1913-06-09 Method of oxidizing steel or iron sheets.

Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919210A (en) * 1956-11-07 1959-12-29 Owens Illinois Glass Co Method of applying glass forming metal borates to surfaces
US4141759A (en) * 1975-01-30 1979-02-27 Uranit Uran-Isotopentrennungs-Gesellschaft Mbh Process for the formation of an anticorrosive, oxide layer on maraging steels
US4153480A (en) * 1976-11-17 1979-05-08 Uranit Uran-Isotopentrennungs-Gesellschaft Mbh Method for forming an anticorrosive oxide layer on steels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919210A (en) * 1956-11-07 1959-12-29 Owens Illinois Glass Co Method of applying glass forming metal borates to surfaces
US4141759A (en) * 1975-01-30 1979-02-27 Uranit Uran-Isotopentrennungs-Gesellschaft Mbh Process for the formation of an anticorrosive, oxide layer on maraging steels
US4153480A (en) * 1976-11-17 1979-05-08 Uranit Uran-Isotopentrennungs-Gesellschaft Mbh Method for forming an anticorrosive oxide layer on steels

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