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GB998687A - Improvements in or relating to surface treatment of bright annealed strip - Google Patents

Improvements in or relating to surface treatment of bright annealed strip

Info

Publication number
GB998687A
GB998687A GB10691/63A GB1069163A GB998687A GB 998687 A GB998687 A GB 998687A GB 10691/63 A GB10691/63 A GB 10691/63A GB 1069163 A GB1069163 A GB 1069163A GB 998687 A GB998687 A GB 998687A
Authority
GB
United Kingdom
Prior art keywords
treatment
effected
relating
surface treatment
acid
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
GB10691/63A
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.)
Allegheny Ludlum Steel Corp
Original Assignee
Allegheny Ludlum Steel Corp
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 Allegheny Ludlum Steel Corp filed Critical Allegheny Ludlum Steel Corp
Publication of GB998687A publication Critical patent/GB998687A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/22—Polishing of heavy metals
    • C25F3/24—Polishing of heavy metals of iron or steel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/26—Anodisation of refractory metals or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/34—Anodisation of metals or alloys not provided for in groups C25D11/04 - C25D11/32

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Stainless steel sheet or strip is first annealed in a reducing atmosphere, e.g. of H or cracked ammonia, and then treated anodically in an electrolyte containing one of acetic acid, formic acid, chromic acid, or caustic soda solution, to give it a high polish. A pre-treatment applying HNO3 or H2SO4 cathodically may be applied. The annealing treatment is effected at 1250-2050 DEG F. using a reducing gas low in moisture, and is applied to all types of Cr-containing stainless steels which may include other alloying metals. The anodic treatment is effected at 40-120 DEG F. using a solution containing 3-60% of chromic acid, and lower concentrations for the other specified reagents, down to 3-20% NaOH.
GB10691/63A 1962-03-28 1963-03-18 Improvements in or relating to surface treatment of bright annealed strip Expired GB998687A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18302662A 1962-03-28 1962-03-28
US343153A US3287237A (en) 1962-03-28 1964-02-06 Surface treatment of bright annealed strip

Publications (1)

Publication Number Publication Date
GB998687A true GB998687A (en) 1965-07-21

Family

ID=26878667

Family Applications (2)

Application Number Title Priority Date Filing Date
GB10691/63A Expired GB998687A (en) 1962-03-28 1963-03-18 Improvements in or relating to surface treatment of bright annealed strip
GB18280/64A Expired GB1020269A (en) 1962-03-28 1964-05-01 Improvements in or relating to surface treatment of bright annealed strip

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB18280/64A Expired GB1020269A (en) 1962-03-28 1964-05-01 Improvements in or relating to surface treatment of bright annealed strip

Country Status (4)

Country Link
US (1) US3287237A (en)
BE (2) BE649912A (en)
DE (2) DE1496704A1 (en)
GB (2) GB998687A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966570A (en) * 1974-01-14 1976-06-29 Nippon Kokan Kabushiki Kaisha Electrolytic post-treating method of electrolytically chromate treated or metallic chromium plated steel sheet

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5912755B2 (en) 1981-06-04 1984-03-26 日本金属株式会社 Stainless steel surface treatment method
US4412892A (en) * 1981-07-13 1983-11-01 The United States Of America As Represented By The Secretary Of The Army Pretreatment of superalloys and stainless steels for electroplating
JPS60218498A (en) * 1984-04-14 1985-11-01 Nippon Steel Corp Method for improving corrosion resistance of bright annealed stainless steel
US5188714A (en) * 1991-05-03 1993-02-23 The Boc Group, Inc. Stainless steel surface passivation treatment
US5259935A (en) * 1991-05-03 1993-11-09 The Boc Group, Inc. Stainless steel surface passivation treatment
US5607520A (en) * 1995-08-18 1997-03-04 Northrop Grumman Corporation Reel-to-reel passivation of stainless steel wire
JP5970796B2 (en) * 2010-12-10 2016-08-17 Ｊｆｅスチール株式会社 Steel foil for solar cell substrate and manufacturing method thereof, and solar cell substrate, solar cell and manufacturing method thereof
CN108716015A (en) * 2018-06-05 2018-10-30 浙江苏泊尔股份有限公司 A method of improving the discoloration of stainless steel work-piece high temperature resistance
CN114395790B (en) * 2021-12-30 2024-04-26 上海电力大学 Corrosion liquid and corrosion method for metallographic structure sample preparation of ferrite and austenite dissimilar steel welded joint

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1901039A (en) * 1931-12-09 1933-03-14 Internaitonal Nickel Company I Process of bright annealing steels and alloys
US2331721A (en) * 1939-08-12 1943-10-12 Rustless Iron & Steel Corp Polishing stainless iron and steel
US2381167A (en) * 1943-06-28 1945-08-07 American Steel & Wire Co Electrolytically polishing stainless steel
US2576680A (en) * 1945-09-15 1951-11-27 Electro Chimie Metal Method for increasing the resistance to corrosion of stainless steel
FR1027550A (en) * 1950-11-10 1953-05-12 Improvements to electrolytic metal polishing baths
US3097980A (en) * 1957-08-22 1963-07-16 Hamilton Watch Co Heat treatment of stainless steel
DE1202607B (en) * 1961-01-20 1965-10-07 Nyby Bruk Ab Process for anodic surface treatment of metal objects
US3247086A (en) * 1961-05-25 1966-04-19 Crucible Steel Co America Method for enhancing corrosion resistance of stainless steels and products thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966570A (en) * 1974-01-14 1976-06-29 Nippon Kokan Kabushiki Kaisha Electrolytic post-treating method of electrolytically chromate treated or metallic chromium plated steel sheet

Also Published As

Publication number Publication date
DE1496704A1 (en) 1969-06-19
BE630167A (en)
BE649912A (en) 1964-12-30
US3287237A (en) 1966-11-22
GB1020269A (en) 1966-02-16
DE1496708A1 (en) 1969-08-21

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