GB1472029A - Oxalate conversion coating process for treating stainless steel - Google Patents

Oxalate conversion coating process for treating stainless steel

Info

Publication number
GB1472029A
GB1472029A GB4453375A GB4453375A GB1472029A GB 1472029 A GB1472029 A GB 1472029A GB 4453375 A GB4453375 A GB 4453375A GB 4453375 A GB4453375 A GB 4453375A GB 1472029 A GB1472029 A GB 1472029A
Authority
GB
United Kingdom
Prior art keywords
stainless steel
coating process
conversion coating
oxalate conversion
treating stainless
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
GB4453375A
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.)
Dalmine SpA
Original Assignee
Dalmine SpA
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 Dalmine SpA filed Critical Dalmine SpA
Publication of GB1472029A publication Critical patent/GB1472029A/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
    • C23C22/73—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 characterised by the process
    • C23C22/77—Controlling or regulating of the coating process

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)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

1472029 Oxalate conversion coatings DALMINE SpA 29 Oct 1975 [11 Nov 1974] 44533/75 Headings C7E and C7U In an oxalic acid conversion coating process for stainless steel the process is controlled by measuring the electro-potential of the article. A stainless steel tube is first oxidized by heating at 1050‹C, and then pickled in a solution comprising, per cent by wt., 6HF, 12HNO 3 , 15H 2 SO 4 .
GB4453375A 1974-11-11 1975-10-29 Oxalate conversion coating process for treating stainless steel Expired GB1472029A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5397774A IT1023210B (en) 1974-11-11 1974-11-11 PREPARATION TREATMENT FOR THE COLD WORKING OF STAINLESS STEELS

Publications (1)

Publication Number Publication Date
GB1472029A true GB1472029A (en) 1977-04-27

Family

ID=11286217

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4453375A Expired GB1472029A (en) 1974-11-11 1975-10-29 Oxalate conversion coating process for treating stainless steel

Country Status (6)

Country Link
AT (1) AT357589B (en)
DE (1) DE2550655C3 (en)
FR (1) FR2290506A1 (en)
GB (1) GB1472029A (en)
IT (1) IT1023210B (en)
SE (1) SE417334B (en)

Also Published As

Publication number Publication date
FR2290506A1 (en) 1976-06-04
DE2550655B2 (en) 1978-09-28
ATA853675A (en) 1979-12-15
SE417334B (en) 1981-03-09
IT1023210B (en) 1978-05-10
DE2550655A1 (en) 1976-05-13
AT357589B (en) 1980-07-25
SE7512607L (en) 1976-05-12
DE2550655C3 (en) 1979-05-23
FR2290506B1 (en) 1979-04-06

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Legal Events

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