GB686781A - Improvements in or relating to the lacquering of iron or steel - Google Patents

Improvements in or relating to the lacquering of iron or steel

Info

Publication number
GB686781A
GB686781A GB48?9/50A GB485950A GB686781A GB 686781 A GB686781 A GB 686781A GB 485950 A GB485950 A GB 485950A GB 686781 A GB686781 A GB 686781A
Authority
GB
United Kingdom
Prior art keywords
solution
acid
lacquering
iron
compound
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
GB48?9/50A
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of GB686781A publication Critical patent/GB686781A/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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

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

Ferrous sheets are prepared for lacquering by treating with an aqueous acidic solution (pH not more than 1.9) containing orthophosphate ions corresponding to at least 5 gms. P2O5 per litre and then passivating with an aqueous solution of chromic acid, a chromate or a nitrite or a mixture thereof, such solution also containing a compound having the property of sequestering metallic ions to avoid sludge formation. The first solution may contain orthophosphoric acid and a primary phosphate of zinc, manganese, iron or calcium, a wetting agent such as a fatty alcohol sulphonate or an alkylated arylsulphonic acid and a fat solvent such as an alcohol. The ion-sequestering compound in the second solution may be a pyrophosphate, metaphosphate, polyphosphate, or the sodium salt of iminotriacetic or ethylene bis-imino diacetic acid; this solution may also contain sodium carbonate. The first solution may be applied by spraying or immersion with or without brushing.
GB48?9/50A 1948-10-01 1950-02-24 Improvements in or relating to the lacquering of iron or steel Expired GB686781A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE686781X 1948-10-01

Publications (1)

Publication Number Publication Date
GB686781A true GB686781A (en) 1953-01-28

Family

ID=6598129

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48?9/50A Expired GB686781A (en) 1948-10-01 1950-02-24 Improvements in or relating to the lacquering of iron or steel

Country Status (1)

Country Link
GB (1) GB686781A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935423A (en) * 1956-09-25 1960-05-03 William H Kapfer Process for applying a protective coating to a magnesium surface
US2954309A (en) * 1956-08-17 1960-09-27 Pennsalt Chemicals Corp Composition for and method of coating ferrous metals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954309A (en) * 1956-08-17 1960-09-27 Pennsalt Chemicals Corp Composition for and method of coating ferrous metals
US2935423A (en) * 1956-09-25 1960-05-03 William H Kapfer Process for applying a protective coating to a magnesium surface

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