GB1113148A - Method for blackening metals and novel compositions therefor - Google Patents

Method for blackening metals and novel compositions therefor

Info

Publication number
GB1113148A
GB1113148A GB5724366A GB5724366A GB1113148A GB 1113148 A GB1113148 A GB 1113148A GB 5724366 A GB5724366 A GB 5724366A GB 5724366 A GB5724366 A GB 5724366A GB 1113148 A GB1113148 A GB 1113148A
Authority
GB
United Kingdom
Prior art keywords
parts
alkali metal
water
soluble
blackening
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
GB5724366A
Inventor
Abraham John Mitchell
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
Priority to GB5724366A priority Critical patent/GB1113148A/en
Publication of GB1113148A publication Critical patent/GB1113148A/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

Stainless steel or other ferrous metal is blackened by immersion in an aqueous bath maintained at 220 DEG F. to 310 DEG F. and containing 2 to 12 lb/gallon of a composition comprising by weight:- 40 to 90 parts of an alkali metal hydroxide 0.1 to 50 parts of an alkali metal nitrate 0.1 to 50 parts of a water-soluble sulphur-bearing compound, reactive with the metal to form a black product, together with 0.0001 to 20 parts of a water-soluble molybdate or 0.0001 to 2 parts of a water soluble dichromate, or preferably both. Alkali metal molybdates and dichromates are preferred, and the bath may contain a wetting agent. Alkali metal and ammonium thiosulphates, thiocyanates and sulphides, thioureas, benzothiazyl disulphide, 2-mercaptoimidazoline and 2-mercaptobenzothiazole are stated to be suitable sulphur-bearing compounds. A protective coating of oil, wax or resin may be applied over the blackened surface.
GB5724366A 1966-12-21 1966-12-21 Method for blackening metals and novel compositions therefor Expired GB1113148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5724366A GB1113148A (en) 1966-12-21 1966-12-21 Method for blackening metals and novel compositions therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5724366A GB1113148A (en) 1966-12-21 1966-12-21 Method for blackening metals and novel compositions therefor

Publications (1)

Publication Number Publication Date
GB1113148A true GB1113148A (en) 1968-05-08

Family

ID=10478717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5724366A Expired GB1113148A (en) 1966-12-21 1966-12-21 Method for blackening metals and novel compositions therefor

Country Status (1)

Country Link
GB (1) GB1113148A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758339A1 (en) * 1997-01-14 1998-07-17 Cirdep Anticorrosion treatment of ferrous metals
WO2003035942A2 (en) * 2001-08-03 2003-05-01 Elisha Holding Llc An electrolytic and electroless process for treating metallic surfaces and products formed thereby
CN103668227A (en) * 2012-09-03 2014-03-26 Skf公司 Method for treating a bearing component
FR3048703A1 (en) * 2016-03-09 2017-09-15 Sarl Ind Et Techniques METHOD AND SYSTEM FOR ANTI-CORROSIVE TREATMENT AND CORRESPONDING COMPUTER PROGRAM

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758339A1 (en) * 1997-01-14 1998-07-17 Cirdep Anticorrosion treatment of ferrous metals
WO2003035942A2 (en) * 2001-08-03 2003-05-01 Elisha Holding Llc An electrolytic and electroless process for treating metallic surfaces and products formed thereby
WO2003035942A3 (en) * 2001-08-03 2004-01-29 Elisha Holding Llc An electrolytic and electroless process for treating metallic surfaces and products formed thereby
US6753039B2 (en) 2001-08-03 2004-06-22 Elisha Holding Llc Electrolytic and electroless process for treating metallic surfaces and products formed thereby
CN103668227A (en) * 2012-09-03 2014-03-26 Skf公司 Method for treating a bearing component
FR3048703A1 (en) * 2016-03-09 2017-09-15 Sarl Ind Et Techniques METHOD AND SYSTEM FOR ANTI-CORROSIVE TREATMENT AND CORRESPONDING COMPUTER PROGRAM

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