GB164128A - Improvements in or relating to oxidation and colouration of ferrous surfaces - Google Patents

Improvements in or relating to oxidation and colouration of ferrous surfaces

Info

Publication number
GB164128A
GB164128A GB6391/20A GB639120A GB164128A GB 164128 A GB164128 A GB 164128A GB 6391/20 A GB6391/20 A GB 6391/20A GB 639120 A GB639120 A GB 639120A GB 164128 A GB164128 A GB 164128A
Authority
GB
United Kingdom
Prior art keywords
articles
boiling
coloured
steel
point
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
GB6391/20A
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.)
SESTRON COLOUR OXIDISING COMPA
Original Assignee
SESTRON COLOUR OXIDISING COMPA
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 SESTRON COLOUR OXIDISING COMPA filed Critical SESTRON COLOUR OXIDISING COMPA
Priority to GB6391/20A priority Critical patent/GB164128A/en
Publication of GB164128A publication Critical patent/GB164128A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces

Abstract

164,128. Rondelli, T., Sestini, Q., and Sestron Colour Oxidising Co., Ltd. March 2, 1928. Addition to 106,774. Metallic oxides, obtaining; treating after electrolysis.-Iron and steel articles are coloured by anodic oxidation in a hot concentrated alkaline liquid. A caustic soda solution, having a boiling- point of 135-180‹ C., is suitable. Organic or inorganic oxidizing agents, such as nitrates and chlorates, may be present; 10-20 per cent sodium nitrate may, for instance, be added. The temperature may be 5-15‹ C. below the boiling-point of the electrolyte, and the articles are left in sufficiently long to attain the same temperature, current being passed either throughout the whole time of immersion or only after the articles are hot. For steel of ordinary hardness, the current density may be 10-15 amperes per sq. dcm. Violet or bronze colours may be obtained. After drying, the coloured articles may be dipped in olive oil or a mixture of linseed and mineral oil, heated to 150-180‹ C.
GB6391/20A 1916-05-26 1920-03-02 Improvements in or relating to oxidation and colouration of ferrous surfaces Expired GB164128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB6391/20A GB164128A (en) 1916-05-26 1920-03-02 Improvements in or relating to oxidation and colouration of ferrous surfaces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6216 1916-05-26
GB6391/20A GB164128A (en) 1916-05-26 1920-03-02 Improvements in or relating to oxidation and colouration of ferrous surfaces

Publications (1)

Publication Number Publication Date
GB164128A true GB164128A (en) 1921-06-02

Family

ID=26240658

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6391/20A Expired GB164128A (en) 1916-05-26 1920-03-02 Improvements in or relating to oxidation and colouration of ferrous surfaces

Country Status (1)

Country Link
GB (1) GB164128A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPS20100025A1 (en) * 2010-10-19 2012-04-20 Dmm S P A SURFACE FINISH PROCEDURE OF STAINLESS STEEL AND STAINLESS STEEL SURFACES WITH THIS PROCEDURE OBTAINED.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPS20100025A1 (en) * 2010-10-19 2012-04-20 Dmm S P A SURFACE FINISH PROCEDURE OF STAINLESS STEEL AND STAINLESS STEEL SURFACES WITH THIS PROCEDURE OBTAINED.
EP2444529A1 (en) * 2010-10-19 2012-04-25 DMM S.p.A. Stainless steel surface finishing process and stainless steel panels obtained by said process

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