EP0241415A1 - Electrolyte acide comportant de l'étain (II) - Google Patents

Electrolyte acide comportant de l'étain (II) Download PDF

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Publication number
EP0241415A1
EP0241415A1 EP87810159A EP87810159A EP0241415A1 EP 0241415 A1 EP0241415 A1 EP 0241415A1 EP 87810159 A EP87810159 A EP 87810159A EP 87810159 A EP87810159 A EP 87810159A EP 0241415 A1 EP0241415 A1 EP 0241415A1
Authority
EP
European Patent Office
Prior art keywords
electrolyte
diphenylamine
ring
acidic
aluminum
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
EP87810159A
Other languages
German (de)
English (en)
Other versions
EP0241415B1 (fr
Inventor
Jean-François Paulet
Bruno Boetsch
Fritz Schneeberger
Günther Tscheulin
Hans Bohler
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.)
Sandoz AG
3A Composites International AG
Original Assignee
Alusuisse Holdings AG
Sandoz AG
Schweizerische Aluminium AG
Alusuisse Lonza Services 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4205369&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0241415(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alusuisse Holdings AG, Sandoz AG, Schweizerische Aluminium AG, Alusuisse Lonza Services Ltd filed Critical Alusuisse Holdings AG
Publication of EP0241415A1 publication Critical patent/EP0241415A1/fr
Application granted granted Critical
Publication of EP0241415B1 publication Critical patent/EP0241415B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/30—Electroplating: Baths therefor from solutions of tin
    • 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
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/20—Electrolytic after-treatment
    • C25D11/22—Electrolytic after-treatment for colouring layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/30—Electroplating: Baths therefor from solutions of tin
    • C25D3/32—Electroplating: Baths therefor from solutions of tin characterised by the organic bath constituents used

Definitions

  • the invention relates to the stabilization of acidic Sn (II) -containing electrolytes which are used for coloring anodically produced oxide layers on aluminum or aluminum alloys or for electroplating.
  • Sn (II) salts are used in acidic solutions, e.g. used in the form of sulfate, fluoroborate or chloride solutions.
  • Sn (II) is oxidized to Sn (IV) during the working process.
  • stabilizers By adding substances to the electrolyte, so-called stabilizers, the oxidation can be more or less prevented, i.e. Sn (II) can be more or less stabilized.
  • the effectiveness of the stabilizer is decisive for the quality of the precipitation or the coloring of the anodized layer. It is generally known that in the presence of both types of ions Sn (II) and Sn (IV) inadequate stabilization of Sn (II) results in significant quantities the surface treatment deteriorated. It is therefore desirable to obtain the tin in acidic solutions as Sn (II).
  • organic aromatic compounds are also known as stabilizers which contain amino groups, e.g. Aminophenol, dimethylaniline.
  • the invention is therefore based on the object of finding an acidic Sn (II) -containing electrolyte for coloring anodically oxidized aluminum oxide layers or for electroplating, which contains substances with a better stabilizing effect of Sn (II) than those known hitherto and better scattering and coupled with it has a better power distribution.
  • the object is achieved by an electrolyte which is distinguished by the wording of claim 1. Further advantageous embodiments of the invention are characterized by the features of claims 2 to 5. A further object of the invention is the use g emäss Claim 6, 1, the method according to the dyeing claims 7 to 9 and the colored aluminum articles according to claim 10 degrees.
  • the groups R 1 to R 10 are preferably H, -NH 2 , -COOM or -S0 3 M and R 11 is preferably hydrogen or a group (a), in which n is a number from 1-5 means.
  • An aqueous electrolyte was produced, consisting of H 2 S0 4 , 10 g / l, and SnS0 4 , 20 g / l. Under these conditions, tin is initially available as Sn (II).
  • the electrolyte was divided into 7 vessels of the same geometric shape. There was 1 liter of electrolyte in each vessel.
  • test series 1 The same stock solution as in test series 1 was prepared and likewise placed in the same vessels as in test series 1, 1 liter of electrolyte. In all baths the pH was 1; the baths were at room temperature and were constantly moved with a magnetic stirrer.
  • Bath 10 thus corresponds to bath 5 of test series 1.
  • test series 1 and 2 which contain the new additives according to the invention, coloring tests of anodically oxidized aluminum layers were carried out in 60 liter baths.
  • the voltage was 15 V in all cases, the treatment time varied between 1 and 12 minutes.
  • the sample panels consisted of PERALUMAN-100 (semi-hard) and had the dimensions 200 x 300 x 1.5 mm. They were anodized using the normal direct current / H 2 S0 4 method.
  • the layer thickness was 20 ⁇ m.
  • Amounts of 1 g of the additives according to the invention per liter of electrolyte were found as a sensible upper limit, without wishing to be determined in the process; accordingly as a reasonable lower limit about 20 mg. A mixture is disturbing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Conductive Materials (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP87810159A 1986-03-25 1987-03-19 Electrolyte acide comportant de l'étain (II) Expired - Lifetime EP0241415B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1223/86 1986-03-25
CH122386 1986-03-25

Publications (2)

Publication Number Publication Date
EP0241415A1 true EP0241415A1 (fr) 1987-10-14
EP0241415B1 EP0241415B1 (fr) 1995-03-08

Family

ID=4205369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810159A Expired - Lifetime EP0241415B1 (fr) 1986-03-25 1987-03-19 Electrolyte acide comportant de l'étain (II)

Country Status (8)

Country Link
EP (1) EP0241415B1 (fr)
JP (1) JPH07107198B2 (fr)
KR (1) KR940010459B1 (fr)
AT (1) ATE119587T1 (fr)
AU (1) AU603790B2 (fr)
CA (1) CA1336129C (fr)
DE (1) DE3751126D1 (fr)
ES (1) ES2069532T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993001332A1 (fr) * 1991-07-04 1993-01-21 Henkel Corporation Procede et composition acide permettant de nettoyer l'aluminium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7009679B2 (ja) * 2015-07-29 2022-01-26 石原ケミカル株式会社 電気スズ及び電気スズ合金メッキ浴、当該メッキ浴を用いた電着物の形成方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1089479A (en) * 1965-11-09 1967-11-01 Monsanto Chemicals Improvements relating to electrodeposition of tin
FR2095375A1 (fr) * 1970-06-19 1972-02-11 Ciba Geigy Ag
US4073701A (en) * 1976-10-15 1978-02-14 Bethlehem Steel Corporation Acid electrotinning bath

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1089479A (en) * 1965-11-09 1967-11-01 Monsanto Chemicals Improvements relating to electrodeposition of tin
FR2095375A1 (fr) * 1970-06-19 1972-02-11 Ciba Geigy Ag
US4073701A (en) * 1976-10-15 1978-02-14 Bethlehem Steel Corporation Acid electrotinning bath

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993001332A1 (fr) * 1991-07-04 1993-01-21 Henkel Corporation Procede et composition acide permettant de nettoyer l'aluminium

Also Published As

Publication number Publication date
JPH07107198B2 (ja) 1995-11-15
AU603790B2 (en) 1990-11-29
KR870009055A (ko) 1987-10-23
EP0241415B1 (fr) 1995-03-08
JPS62270791A (ja) 1987-11-25
DE3751126D1 (de) 1995-04-13
ES2069532T3 (es) 1995-05-16
CA1336129C (fr) 1995-07-04
KR940010459B1 (ko) 1994-10-22
AU7054487A (en) 1987-10-01
ATE119587T1 (de) 1995-03-15

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