GB489211A - Improved method of bright-pickling articles of copper-zinc alloys - Google Patents

Improved method of bright-pickling articles of copper-zinc alloys

Info

Publication number
GB489211A
GB489211A GB25984/37A GB2598437A GB489211A GB 489211 A GB489211 A GB 489211A GB 25984/37 A GB25984/37 A GB 25984/37A GB 2598437 A GB2598437 A GB 2598437A GB 489211 A GB489211 A GB 489211A
Authority
GB
United Kingdom
Prior art keywords
pickling
articles
copper
bright
zinc 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.)
Expired
Application number
GB25984/37A
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.)
GEORG VON GIESCHE S ERBEN
Original Assignee
GEORG VON GIESCHE S ERBEN
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 GEORG VON GIESCHE S ERBEN filed Critical GEORG VON GIESCHE S ERBEN
Publication of GB489211A publication Critical patent/GB489211A/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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/04—Heavy metals
    • C23F3/06—Heavy metals with acidic solutions
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/10—Other heavy metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

A bright finish is produced on copper-zinc alloys by pickling in a solution containing chromic acid and hydrochloric acid, rinsing, and then removing any coating or discoloration produced by the first solution by pickling in a solution containing chromic acid only. The articles are not degreased before treatment; the first solution preferably contains not less than 15 per cent by weight of chromium trioxide and not more than 15 per cent of hydrochloric acid, and the second solution preferably contains 10-70 per cent of chromic acid. The temperature of the solutions must not exceed 30 DEG C.
GB25984/37A 1936-09-30 1937-09-24 Improved method of bright-pickling articles of copper-zinc alloys Expired GB489211A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE489211X 1936-09-30

Publications (1)

Publication Number Publication Date
GB489211A true GB489211A (en) 1938-07-21

Family

ID=6543923

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25984/37A Expired GB489211A (en) 1936-09-30 1937-09-24 Improved method of bright-pickling articles of copper-zinc alloys

Country Status (1)

Country Link
GB (1) GB489211A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434021A (en) * 1943-03-08 1948-01-06 Ncr Co Process of bright dipping
US2446060A (en) * 1944-07-04 1948-07-27 Battelle Development Corp Chemical polishing of metal surfaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434021A (en) * 1943-03-08 1948-01-06 Ncr Co Process of bright dipping
US2446060A (en) * 1944-07-04 1948-07-27 Battelle Development Corp Chemical polishing of metal surfaces

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