GB1452074A - Process for treating steel sheets for the purpose of enamelling the sheets - Google Patents

Process for treating steel sheets for the purpose of enamelling the sheets

Info

Publication number
GB1452074A
GB1452074A GB5286273A GB5286273A GB1452074A GB 1452074 A GB1452074 A GB 1452074A GB 5286273 A GB5286273 A GB 5286273A GB 5286273 A GB5286273 A GB 5286273A GB 1452074 A GB1452074 A GB 1452074A
Authority
GB
United Kingdom
Prior art keywords
enamelling
nov
sheets
metal
salts
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
GB5286273A
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.)
USINOR SA
Original Assignee
USINOR SA
Union Siderurgique du Nord et de lEst de France SA USINOR
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 claimed from FR7241241A external-priority patent/FR2213353A1/en
Priority claimed from FR7339504A external-priority patent/FR2249967A2/en
Application filed by USINOR SA, Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical USINOR SA
Publication of GB1452074A publication Critical patent/GB1452074A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising

Abstract

1452074 Steel sheet for enamelling UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE 14 Nov 1973 [21 Nov 1972 7 Nov 1973] 52862/73 Headings C7D and C7F Steel sheet for enamelling is coated with Ni and/or Co or salts thereof to deposit 0.45 - 20g of metal per sq. m and then gas decarburized to eliminate substantially all carbon with reduction of the salt to metal; during cooling from the decarburizing anneal the sheet is subjected to an oxidizing atmosphere containing 2% to 7% of water vapour and having an H 2 /H 2 O ratio less than 6 whereby the coating metal is converted to a tightly adherent oxide. Preferably decarburization is carried out in a nitrogen-hydrogen mixture containing 10 - 75% hydrogen with a dewpoint of 20 - 55‹C and a H 2 :H 2 O ratio of 3.5:1 to 6:1, while the coating may be applied by dipping in an aqueous solution of Co and/or Ni salts, or by applying the nitrates, possibly by spraying, while molten in their water of crystallization.
GB5286273A 1972-11-21 1973-11-14 Process for treating steel sheets for the purpose of enamelling the sheets Expired GB1452074A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7241241A FR2213353A1 (en) 1972-11-21 1972-11-21 Pretreatment of steel strip - providing a coating which can be directly enamelled
FR7339504A FR2249967A2 (en) 1973-11-07 1973-11-07 Pretreatment of steel strip - providing a coating which can be directly enamelled

Publications (1)

Publication Number Publication Date
GB1452074A true GB1452074A (en) 1976-10-06

Family

ID=26217415

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5286273A Expired GB1452074A (en) 1972-11-21 1973-11-14 Process for treating steel sheets for the purpose of enamelling the sheets

Country Status (5)

Country Link
JP (1) JPS5311260B2 (en)
GB (1) GB1452074A (en)
IT (1) IT997741B (en)
LU (1) LU68784A1 (en)
NL (1) NL7315955A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59190331A (en) * 1983-04-12 1984-10-29 Kawasaki Steel Corp Continuous casting steel plate of extralow carbon and extralow nitrogen for enamel
JPS60192033A (en) * 1984-01-17 1985-09-30 Katsuyoshi Harada Mud forced-feeding tank device

Also Published As

Publication number Publication date
JPS5046526A (en) 1975-04-25
NL7315955A (en) 1974-05-24
IT997741B (en) 1975-12-30
JPS5311260B2 (en) 1978-04-20
LU68784A1 (en) 1974-01-21

Similar Documents

Publication Publication Date Title
Tegehall et al. Nucleation and formation of zinc phosphate conversion coating on cold-rolled steel
CA2110281A1 (en) Surface treated steel sheet reduced in plating defects and production thereof
GB936937A (en) Solutions for treating metal surfaces, either bare or chemically-coated, to improve their corrosion resistance, methods of preparing such solutions, and treatment processes in which they are employed
GB1324429A (en) Method of forming electric insulating coating on the surface of silicon steel sheet
CA2073258A1 (en) Method for hot-dip chromium-bearing steel
US4153479A (en) Acidic zinc phosphate solution and method
ES440399A1 (en) Method of coating carbon steel
GB1452074A (en) Process for treating steel sheets for the purpose of enamelling the sheets
GB674490A (en) Improvements in and relating to method of treating iron or mild steel to promote theadherence of porcelain enamel, and stock so produced
ES8406564A1 (en) Process for phosphatizing zinc-electroplated metal objects.
GB1515040A (en) Method of producing coated steel sheets
US3868277A (en) Method of producing a steel product having an oxidation-resistant coating
US4012239A (en) Process for treating steel sheets for the purpose of enamelling the sheets
US3677797A (en) Method of forming corrosion resistant films on steel plates
CA2038504A1 (en) Method of producing hot-dip galvannealed steel sheet
US3052575A (en) Method of inhibiting corrosion
GB1493224A (en) Zinc-based alloy for coating steel and products coated therewith
US2594129A (en) Method of preparing surfaces for tinning
US2862842A (en) Pretreatment of iron or steel base for single coat vitreous enameling
ES274253A1 (en) Improvements relating to the phosphate-coating of metals
GB1040057A (en) Composite steel article
RU2186150C2 (en) Steel product zinc plating method
JPS6137974A (en) Coloring treatment of stainless steel to provide superior corrosion resistance
GB1510277A (en) Accelerator for phosphating solutions
JPS54147125A (en) Treating method for hot rolled steel strip

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee