GB597754A - Process for treating ferrous sheets and other ferrous articles - Google Patents

Process for treating ferrous sheets and other ferrous articles

Info

Publication number
GB597754A
GB597754A GB2182445A GB2182445A GB597754A GB 597754 A GB597754 A GB 597754A GB 2182445 A GB2182445 A GB 2182445A GB 2182445 A GB2182445 A GB 2182445A GB 597754 A GB597754 A GB 597754A
Authority
GB
United Kingdom
Prior art keywords
ferrous
washing
water
sheets
articles
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
GB2182445A
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.)
Joseph Sankey and Sons Ltd
Original Assignee
Joseph Sankey and Sons Ltd
Filing date
Publication date
Application filed by Joseph Sankey and Sons Ltd filed Critical Joseph Sankey and Sons Ltd
Publication of GB597754A publication Critical patent/GB597754A/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
    • C23C22/06—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
    • C23C22/24—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 hexavalent chromium compounds

Abstract

Ferrous sheets or other ferrous articles are passivated by pickling in dilute sulphuric acid, washing in water, dipping in dilute nitric acid, washing in water, dipping in chromic acid solution, washing and drying. A suitable chromic acid solution contains 50 grams CrO3 in 100 mls. of water or an equivalent amount of sodium chromate, potassium chromate or potassium dichromate may be used. The treatment is stated to be suitable for the treatment of 4 per cent silicon steel used as cores for electrical machines.
GB2182445A 1945-08-24 Process for treating ferrous sheets and other ferrous articles Expired GB597754A (en)

Publications (1)

Publication Number Publication Date
GB597754A true GB597754A (en) 1948-02-03

Family

ID=1736505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2182445A Expired GB597754A (en) 1945-08-24 Process for treating ferrous sheets and other ferrous articles

Country Status (1)

Country Link
GB (1) GB597754A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768103A (en) * 1952-03-18 1956-10-23 Heintz Mfg Co Method for coating metals
US2773623A (en) * 1954-06-01 1956-12-11 Heintz Mfg Co Corrosion resistant coated steel members and method of making
US2777785A (en) * 1953-07-30 1957-01-15 Heintz Mfg Co Composition for and method of treating metals as well as the treated product
US2853406A (en) * 1956-04-17 1958-09-23 Kelsey Hayes Co Metal coating
US2858244A (en) * 1954-05-14 1958-10-28 Solar Aircraft Co Oxidizing process for ferrous alloys containing at least 5% chromium
US2861906A (en) * 1956-10-15 1958-11-25 Kelsey Hayes Co Metal treatment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768103A (en) * 1952-03-18 1956-10-23 Heintz Mfg Co Method for coating metals
US2777785A (en) * 1953-07-30 1957-01-15 Heintz Mfg Co Composition for and method of treating metals as well as the treated product
US2858244A (en) * 1954-05-14 1958-10-28 Solar Aircraft Co Oxidizing process for ferrous alloys containing at least 5% chromium
US2773623A (en) * 1954-06-01 1956-12-11 Heintz Mfg Co Corrosion resistant coated steel members and method of making
US2853406A (en) * 1956-04-17 1958-09-23 Kelsey Hayes Co Metal coating
US2861906A (en) * 1956-10-15 1958-11-25 Kelsey Hayes Co Metal treatment

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