FR2143231A1 - Colouring chromium alloys - with aqs soln of chromic/sulphurc acids - Google Patents

Colouring chromium alloys - with aqs soln of chromic/sulphurc acids

Info

Publication number
FR2143231A1
FR2143231A1 FR7222436A FR7222436A FR2143231A1 FR 2143231 A1 FR2143231 A1 FR 2143231A1 FR 7222436 A FR7222436 A FR 7222436A FR 7222436 A FR7222436 A FR 7222436A FR 2143231 A1 FR2143231 A1 FR 2143231A1
Authority
FR
France
Prior art keywords
colouring
chromic
sulphurc
acids
chromium alloys
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.)
Granted
Application number
FR7222436A
Other languages
French (fr)
Other versions
FR2143231B1 (en
Inventor
A C Hart
V A Smith
A N Skedgell
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.)
Inco Ltd
Original Assignee
Inco Ltd
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 Inco Ltd filed Critical Inco Ltd
Publication of FR2143231A1 publication Critical patent/FR2143231A1/en
Application granted granted Critical
Publication of FR2143231B1 publication Critical patent/FR2143231B1/fr
Granted 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/12—Process control or regulation
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02—Hoppers; Delivery shoots

Abstract

Colouring of the surface of a chromium alloy which is immersed in an aqs. solns of chromic acid and sulphuric acid, is controlled by maintaining a potential difference between the surface of the alloya dn a reference electrode and removing the alloy from the soln when this potential difference alters by a definite degree from the predefined bending potential, the definite degree being related to the desired colour. Process enables a definite colour to be obtd. reproducibly on the surface of the chromium alloy without using visual control of the colouring process.
FR7222436A 1971-06-22 1972-06-21 Colouring chromium alloys - with aqs soln of chromic/sulphurc acids Granted FR2143231A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2922971 1971-06-22
GB1794072 1972-04-18

Publications (2)

Publication Number Publication Date
FR2143231A1 true FR2143231A1 (en) 1973-02-02
FR2143231B1 FR2143231B1 (en) 1978-03-03

Family

ID=26253018

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7222436A Granted FR2143231A1 (en) 1971-06-22 1972-06-21 Colouring chromium alloys - with aqs soln of chromic/sulphurc acids

Country Status (16)

Country Link
JP (1) JPS5225817B1 (en)
AT (1) AT313013B (en)
AU (1) AU462078B2 (en)
BE (1) BE785277A (en)
CA (1) CA970667A (en)
CH (1) CH554422A (en)
DK (1) DK136623B (en)
FI (1) FI53136C (en)
FR (1) FR2143231A1 (en)
IE (1) IE36418B1 (en)
IL (1) IL39698A0 (en)
IT (1) IT958597B (en)
LU (1) LU65545A1 (en)
NL (1) NL147790B (en)
NO (1) NO130690C (en)
SE (1) SE373883B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5479823U (en) * 1977-11-11 1979-06-06
JPS6022065B2 (en) * 1983-07-11 1985-05-30 日新製鋼株式会社 Continuous coloring method for stainless steel strip
US4576414A (en) * 1984-01-27 1986-03-18 Caterpiller Tractor Co. Seat belt apparatus
JP5030560B2 (en) * 2006-11-29 2012-09-19 クリナップ株式会社 Mirror cabinet

Also Published As

Publication number Publication date
CH554422A (en) 1974-09-30
NL7208471A (en) 1972-12-28
NL147790B (en) 1975-11-17
DE2230157B2 (en) 1975-12-11
NO130690C (en) 1975-01-22
JPS5225817B1 (en) 1977-07-09
SE373883B (en) 1975-02-17
AT313013B (en) 1974-01-25
FI53136B (en) 1977-10-31
DK136623B (en) 1977-10-31
NO130690B (en) 1974-10-14
FR2143231B1 (en) 1978-03-03
AU462078B2 (en) 1975-05-20
DK136623C (en) 1978-04-10
IE36418L (en) 1972-12-22
LU65545A1 (en) 1973-01-22
IT958597B (en) 1973-10-30
FI53136C (en) 1978-02-10
IL39698A0 (en) 1972-08-30
AU4349572A (en) 1973-12-20
BE785277A (en) 1972-12-22
CA970667A (en) 1975-07-08
DE2230157A1 (en) 1973-02-01
IE36418B1 (en) 1976-10-27

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