GB978955A - Improvements in or relating to the stripping of nickel - Google Patents

Improvements in or relating to the stripping of nickel

Info

Publication number
GB978955A
GB978955A GB19869/61A GB1986961A GB978955A GB 978955 A GB978955 A GB 978955A GB 19869/61 A GB19869/61 A GB 19869/61A GB 1986961 A GB1986961 A GB 1986961A GB 978955 A GB978955 A GB 978955A
Authority
GB
United Kingdom
Prior art keywords
composition
parts
compound
ammonium
ammonia
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
GB19869/61A
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.)
ELTEX RES CORP
Original Assignee
ELTEX RES 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 ELTEX RES CORP filed Critical ELTEX RES CORP
Publication of GB978955A publication Critical patent/GB978955A/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
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
    • 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
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/32—Alkaline compositions
    • C23F1/40—Alkaline compositions for etching other metallic material

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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • ing And Chemical Polishing (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

A composition for selectively stripping electrodeposited nickel from a base metal comprises a nitro-organic compound, an ammonium compound and a sulphur compound yielding sulphide ions in aqueous solution, whereby ammonia is released in solution during stripping. The nitro-organic compound, preferably at least 1% by weight of the composition, corresponds to the formula RNO2 wherein R is preferably an aromatic-carboxylic/sulphonic/phosphoni acid or -hydroxyl radical, or a mixture of the o-, m- and pisomers thereof, or the alkali metal or ammonium salt thereof, e.g. nitrochlorobenzenes, nitrobenzoic acid salts, nitrobenzene sulphonates, nitroanilines or nitrophenols. Alternatively R may be an aliphatic radical such as in the nitroparaffins with 1-6 carbon atoms. The ammonium compound may be a (bi)carbonate, (bi)sulphate, (bi)phosphate, nitrate, chloride, citrate, tartrate, oxalate, lactate, acetate, propionate, benzoate, phthalate, maleate, or a salt of an amino acid, e.g. nitriloacetic, ethylenediaminetetraacetic, diethylenetriaminepentaacetic acid, from which ammonia is released by adding caustic alkali. The sulphur compound is preferably an alkali metal sulphide. Some of the ammonium salt may be replaced by ammonia solution and urea may be additionally added. For example, the composition may comprise by weight 2-20 parts of Na m-nitrobenzene sulphonate, 10-85 parts of ammonium sulphate, trace-1 part of Na2S and 0-10 parts of urea. A further 10-40 parts of NaOH may be added to a bath of this composition. Specification 892,054 and U.S.A. Specifications 2,649,361 and 2,698,781 are referred to.
GB19869/61A 1961-04-13 1961-06-01 Improvements in or relating to the stripping of nickel Expired GB978955A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US102658A US3245780A (en) 1961-04-13 1961-04-13 Nickel stripping ammoniacal solution containing a nitro benzene compound

Publications (1)

Publication Number Publication Date
GB978955A true GB978955A (en) 1965-01-01

Family

ID=22290990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19869/61A Expired GB978955A (en) 1961-04-13 1961-06-01 Improvements in or relating to the stripping of nickel

Country Status (3)

Country Link
US (1) US3245780A (en)
DE (1) DE1281778B (en)
GB (1) GB978955A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4720332A (en) * 1986-04-21 1988-01-19 Coffey Barry W Nickel strip formulation
PL1654387T3 (en) 2003-08-15 2009-10-30 Univ South Florida Materials and methods for capture of pathogens and removal of aurintricarboxylic acid from a sample
US7618891B2 (en) * 2006-05-01 2009-11-17 International Business Machines Corporation Method for forming self-aligned metal silicide contacts

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA576045A (en) * 1959-05-19 R. Meyer Walter Process for accelerating the acid stripping of metals
US2200782A (en) * 1935-05-23 1940-05-14 Metal & Thermit Corp Detinning
US2670271A (en) * 1948-11-27 1954-02-23 Alfred M Thomsen Process of recovering metal values from leach liquors
US2649361A (en) * 1949-05-13 1953-08-18 Enthone Method of dissolving metals and compostion therefor
US2694006A (en) * 1952-03-14 1954-11-09 Chemical Construction Corp Separation of nickel and cobalt metal from ammine solution
US2698781A (en) * 1953-04-27 1955-01-04 Enthone Accelerating action of acids on metals
US2937940A (en) * 1957-07-01 1960-05-24 Eltex Chemical Corp Selective stripping of electroplated metals
US2915388A (en) * 1957-11-19 1959-12-01 American Cyanamid Co Separation of nickel and cobalt

Also Published As

Publication number Publication date
US3245780A (en) 1966-04-12
DE1281778B (en) 1968-10-31

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