GB1458644A - Compositions and process for blackening steel - Google Patents

Compositions and process for blackening steel

Info

Publication number
GB1458644A
GB1458644A GB2469275A GB2469275A GB1458644A GB 1458644 A GB1458644 A GB 1458644A GB 2469275 A GB2469275 A GB 2469275A GB 2469275 A GB2469275 A GB 2469275A GB 1458644 A GB1458644 A GB 1458644A
Authority
GB
United Kingdom
Prior art keywords
alkali metal
blackening
steel
sulphonated
wetting agent
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
GB2469275A
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.)
Mitchell-Bradford Chemical Co
Original Assignee
Mitchell-Bradford Chemical Co
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 Mitchell-Bradford Chemical Co filed Critical Mitchell-Bradford Chemical Co
Publication of GB1458644A publication Critical patent/GB1458644A/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

1458644 Blackening metal surfaces MITCHELL BRADFORD CHEMICAL CO 9 June 1975 [24 Oct 1974] 24692/75 Heading C7U A dry dichromate free composition suitable for use in aqueous solution for blackening iron and steel including hardened steel and stainless steel contains in parts by weight 50-90 alkali metal hydroxide, 0À1-50 alkali metal nitrate, 0À1-50 alkali metal nitrite, 0À001-20 of a cyclic S containing compound selected from 2-mercaptobenzothiazole, benzothiazyl disulphide and 2-mercaptoimidazoline, 0À001-20 of molybdic acid and/or alkali metal molybdate, 0-20 wetting agent and 0-20 of a metal salt of a sulphonated dye. The aqueous solution may contain 2-10 pounds per gallon of the composition and blackening is effected by immersion for 10-25 minutes in the solution at 255-325‹F. The blackened steel is rinsed in cold water and dried or dipped in oil or wax. A preferred wetting agent is alkyl naphthalene sodium sulphonate and the sulphonated dye salts may be the sodium salts of diphenyl-dis-azo-bis-8-amino-1-naphthal-3; 6-disulphonic acid; 8-anilino-5-(p-hydroxy anilino) -1-naphthalene sulphonic acid and sulphonated anthraquinone vat dyes.
GB2469275A 1974-10-24 1975-06-09 Compositions and process for blackening steel Expired GB1458644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US517485A US3899367A (en) 1974-10-24 1974-10-24 Compositions and methods for blackening hardened steel

Publications (1)

Publication Number Publication Date
GB1458644A true GB1458644A (en) 1976-12-15

Family

ID=24060010

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2469275A Expired GB1458644A (en) 1974-10-24 1975-06-09 Compositions and process for blackening steel

Country Status (4)

Country Link
US (1) US3899367A (en)
JP (1) JPS5159036A (en)
CA (1) CA1034847A (en)
GB (1) GB1458644A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2211782A (en) * 1987-10-31 1989-07-12 Ikeda Bussan Co Method of producing skin-covered foamed plastic article

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6576346B1 (en) 1999-05-24 2003-06-10 Birchwood Laboratories, Inc. Composition and method for metal coloring process
US6695931B1 (en) 1999-05-24 2004-02-24 Birchwood Laboratories, Inc. Composition and method for metal coloring process
US6309476B1 (en) 1999-05-24 2001-10-30 Birchwood Laboratories, Inc. Composition and method for metal coloring process
AU2002363057A1 (en) * 2001-08-03 2003-05-06 Elisha Holding Llc An electrolytic and electroless process for treating metallic surfaces and products formed thereby
US6899956B2 (en) 2002-05-03 2005-05-31 Birchwood Laboratories, Inc. Metal coloring process and solutions therefor
US7964044B1 (en) * 2003-10-29 2011-06-21 Birchwood Laboratories, Inc. Ferrous metal magnetite coating processes and reagents
US7144599B2 (en) 2004-07-15 2006-12-05 Birchwood Laboratories, Inc. Hybrid metal oxide/organometallic conversion coating for ferrous metals
CN101280427B (en) * 2007-04-06 2010-08-25 长春奥普光电技术股份有限公司 Constant temperature chemical oxidation blackening process for iron-nickel alloy for optical instrument
DE102007048750A1 (en) * 2007-10-11 2009-04-16 Schaeffler Kg Method for producing a metallic component, in particular a bearing component or precision component, and component produced according to the method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1723067A (en) * 1926-04-16 1929-08-06 Pacz Aladar Method and composition of matter for coating and coloring metal articles
US2557507A (en) * 1950-05-11 1951-06-19 Jr Victor Lang Adjustable joint structure for electric lamp supports
US2679475A (en) * 1952-01-21 1954-05-25 Joseph C Singler Metal blackening composition and method
US2960420A (en) * 1959-01-23 1960-11-15 Mitchell Bradford Chemical Co Method and composition for blackening metal articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2211782A (en) * 1987-10-31 1989-07-12 Ikeda Bussan Co Method of producing skin-covered foamed plastic article
GB2211782B (en) * 1987-10-31 1991-11-13 Ikeda Bussan Co Method of producing skin-covered foamed plastic article

Also Published As

Publication number Publication date
JPS5159036A (en) 1976-05-22
US3899367A (en) 1975-08-12
CA1034847A (en) 1978-07-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee