GB718514A - Improvements in or relating to vitreous enameling - Google Patents

Improvements in or relating to vitreous enameling

Info

Publication number
GB718514A
GB718514A GB1994351A GB1994351A GB718514A GB 718514 A GB718514 A GB 718514A GB 1994351 A GB1994351 A GB 1994351A GB 1994351 A GB1994351 A GB 1994351A GB 718514 A GB718514 A GB 718514A
Authority
GB
United Kingdom
Prior art keywords
bath
sodium
coating
nitrate
pickling
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
GB1994351A
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.)
Poor and Co
Original Assignee
Poor and 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
Priority to US115706A priority Critical patent/US2569453A/en
Application filed by Poor and Co filed Critical Poor and Co
Priority to GB1994351A priority patent/GB718514A/en
Publication of GB718514A publication Critical patent/GB718514A/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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D3/00—Chemical treatment of the metal surfaces prior to coating
    • 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
    • C23C22/06—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 aqueous acidic solutions with pH less than 6
    • C23C22/07—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 aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

Low carbon ferrous metals are prepared for nitreous enamelling by pickling in a sulphuric acid bath, depositing on the pickled surface a coating of a phosphate and elemental sulphur, sealing such coating with a thin coating of antimony and sealing the antimony coating with a thin coating of nickel. The pickling bath may contain 4-8 per cent. sulphuric acid to which is preferably added manganese dioxide, manganese nitrate, lithium nitrate, potassium nitrate and/or sodium nitrate, as well as ferrous sulphate and sodium bisulphate and strontium carbonate, lithium carbonate, lithium phosphate or titanium sulphate with a foaming agent, and a wetting agent. After pickling, a rinsing bath containing 0.5-1 per cent. of sulphuric acid is used. In the next stage, a bath of phosphoric acid and a sulphur-liberating compound such as sodium hydrosulphite, sodium thiosulphate or a polysulphide, which may also contain lithium phosphate, is employed at 140 DEG -185 DEG F. The article is then dried or rinsed and immersed in a bath of potassium antimonyl tartrate preferably containing a thiosulphate. It is then again dried or rinsed and nickel deposited chemically or electrolytically; a suitable chemical plating bath comprises nickel chloride, sodium thyophosphite, ammonium chloride, sodium citrate and ammonium hydroxide at pH 8-10; in preparing this bath, nickel chloride and ammonium chloride are first mixed and purified by the addition of hydrogen peroxide.
GB1994351A 1949-09-14 1951-08-23 Improvements in or relating to vitreous enameling Expired GB718514A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US115706A US2569453A (en) 1949-09-14 1949-09-14 Vitreous enamel base stock, vitreous enameled articles and method
GB1994351A GB718514A (en) 1951-08-23 1951-08-23 Improvements in or relating to vitreous enameling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1994351A GB718514A (en) 1951-08-23 1951-08-23 Improvements in or relating to vitreous enameling

Publications (1)

Publication Number Publication Date
GB718514A true GB718514A (en) 1954-11-17

Family

ID=10137715

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1994351A Expired GB718514A (en) 1949-09-14 1951-08-23 Improvements in or relating to vitreous enameling

Country Status (1)

Country Link
GB (1) GB718514A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107460469A (en) * 2016-06-06 2017-12-12 湖北荣太炊具有限公司 Iron-based complex oxide film is used in one kind spraying
CN107460466A (en) * 2016-06-06 2017-12-12 湖北荣太炊具有限公司 A kind of wear-resisting complex oxide film of iron-based

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107460469A (en) * 2016-06-06 2017-12-12 湖北荣太炊具有限公司 Iron-based complex oxide film is used in one kind spraying
CN107460466A (en) * 2016-06-06 2017-12-12 湖北荣太炊具有限公司 A kind of wear-resisting complex oxide film of iron-based

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