GB604379A - Process for the treatment of sheet iron - Google Patents

Process for the treatment of sheet iron

Info

Publication number
GB604379A
GB604379A GB25562/45A GB2556245A GB604379A GB 604379 A GB604379 A GB 604379A GB 25562/45 A GB25562/45 A GB 25562/45A GB 2556245 A GB2556245 A GB 2556245A GB 604379 A GB604379 A GB 604379A
Authority
GB
United Kingdom
Prior art keywords
parts
acid
metal
per cent
washing
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
GB25562/45A
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.)
FRANCISCO AMBROSIO RICCARDO FR
Original Assignee
FRANCISCO AMBROSIO RICCARDO FR
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 FRANCISCO AMBROSIO RICCARDO FR filed Critical FRANCISCO AMBROSIO RICCARDO FR
Publication of GB604379A publication Critical patent/GB604379A/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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/085—Iron or steel solutions containing HNO3
    • 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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

Abstract

In a process of treating sheet iron to obtain a clean metallic surface, the metal is immersed for 5 to 30 minutes in an acid bath composed of 3 to 9 parts by weight of nitric acid, 31 to 33 parts of hydrochloric acid, 10 to 20 parts of sulphuric acid, 8 to 12 parts of hydrogen sulphide, 1 to 7 parts of acetic acid, and 2 to 9 parts of bitriphosphate of potassium in 100 parts by weight of water. The surface may then be neutralized in an alkaline bath consisting of an aqueous solution containing 3 to 10 per cent caustic soda, 2-8 per cent caustic potash and 3-15 per cent of ammonium hydrate and immersion may be for 2 to 6 minutes followed by washing. The metal is then suitable for varnishing, tinning or galvanising but if this operation is not being carried out within a short time the metal may be given a further treatment in a silicate solution of pH value 8-12 at 75 DEG to 100 DEG C. The silicate protection may be removed by washing in warm water.
GB25562/45A 1945-02-23 1945-10-02 Process for the treatment of sheet iron Expired GB604379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH604379X 1945-02-23

Publications (1)

Publication Number Publication Date
GB604379A true GB604379A (en) 1948-07-02

Family

ID=4522941

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25562/45A Expired GB604379A (en) 1945-02-23 1945-10-02 Process for the treatment of sheet iron

Country Status (4)

Country Link
US (1) US2455411A (en)
BE (1) BE460366A (en)
FR (1) FR911200A (en)
GB (1) GB604379A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207442A (en) * 1987-07-09 1989-02-01 Inco Alloys Int Method for surface activation of water atomized powders by pickling prior to compacting
US4960459A (en) * 1987-07-09 1990-10-02 Inco Alloys International, Inc. Method for surface activation of water atomized powders by pickling

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873256A (en) * 1955-05-05 1959-02-10 Aris P Saris Rust eradicator and method of using same
US3033710A (en) * 1957-03-12 1962-05-08 Branson Instr Method of surface cleaning using ultrasonic energy
FR2560893B1 (en) * 1984-03-09 1986-09-12 Snecma CHEMICAL STRIPPING BATH FOR HOT-RESISTANT ALLOY PARTS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207442A (en) * 1987-07-09 1989-02-01 Inco Alloys Int Method for surface activation of water atomized powders by pickling prior to compacting
US4960459A (en) * 1987-07-09 1990-10-02 Inco Alloys International, Inc. Method for surface activation of water atomized powders by pickling
GB2207442B (en) * 1987-07-09 1991-06-19 Inco Alloys Int Method for surface activation of water atomized powders

Also Published As

Publication number Publication date
BE460366A (en)
FR911200A (en) 1946-07-01
US2455411A (en) 1948-12-07

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