EP0247525A1 - Verfahren zur elektrolytischen Metallplattierung auf Titan - Google Patents

Verfahren zur elektrolytischen Metallplattierung auf Titan Download PDF

Info

Publication number
EP0247525A1
EP0247525A1 EP87107410A EP87107410A EP0247525A1 EP 0247525 A1 EP0247525 A1 EP 0247525A1 EP 87107410 A EP87107410 A EP 87107410A EP 87107410 A EP87107410 A EP 87107410A EP 0247525 A1 EP0247525 A1 EP 0247525A1
Authority
EP
European Patent Office
Prior art keywords
titanium
deposition
nickel
electrolytic
rinsing
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.)
Withdrawn
Application number
EP87107410A
Other languages
English (en)
French (fr)
Inventor
Serge Temprano
Bernard Artero
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.)
Alcatel Espace Industries SA
Original Assignee
Alcatel Espace Industries SA
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 Alcatel Espace Industries SA filed Critical Alcatel Espace Industries SA
Publication of EP0247525A1 publication Critical patent/EP0247525A1/de
Withdrawn legal-status Critical Current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
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/38—Pretreatment of metallic surfaces to be electroplated of refractory metals or nickel

Definitions

  • the most used is that which consists of stripping the titanium in pure hydrochloric acid at 90 ° C and then making a passage in sulfo-hydrochloric acid. But with this solution, more than 50% of adhesion defects appear on the base material, caused by the rapid oxidation of titanium.
  • the object of the invention is to overcome these drawbacks.
  • the invention proposes, in fact, a method of metallic deposition on titanium by electrolytic means, characterized in that it comprises a step of pickling with sulfuric acid at 95% RP, the bath temperature being between 30 ° C and 80 ° C, the concentration being between 20 and 80% in water, the immersion time being between 30 seconds and 5 minutes.
  • the inventive method comprises the following steps: . chemical degreasing then rinsing; . electrolytic degreasing then rinsing; . pickling with 95% RP sulfuric acid then quick rinses. . deposition of a nickel sublayer; . deposit of a final layer (gold, silver ).
  • the new process therefore consists of a pickling change which guarantees a success rate of around 99%, and which meets the severe requirements of the standards imposed on space equipment: in particular the respect of good adhesion at the temperatures included between - 100 ° C and + 260 ° C.
  • titanium is used as a microelectric support in thin or thick layer on ceramic, because of different specific properties: in fact it has qualities of lightness, non-magnetism. Plus his expansion coefficient is adapted to that of the ceramics to be welded on.
  • the process of the invention consists of pickling applied to the titanium grade T40.
  • This stripping has the following characteristics: . nature of the pickling product: sulfuric acid 95% RP ("pure recta"); . bath temperature: 30 ° to 80 ° C; . concentration: 20 to 80% in water; . immersion time: 30 seconds to 5 minutes.
  • Such a treatment overcomes the adhesion defect of a nickel undercoat on titanium. It makes it possible to improve the adhesion of an electrolytic deposit of a metal such as gold, silver, or copper, etc. on this bonding under layer made of nickel. Such a method can be used, in particular, in the field of the aerospace industry.
  • the titanium treatment therefore comprises the following stages: . chemical degreasing then rinsing; . electrolytic degreasing then rinsing; . pickling according to the method of the invention then quick rinses (between 15 and 20 seconds); . deposition of a nickel undercoat: - by matt electrolytic nickel plating (immerse the live parts in the bath, for example with 3 amperes per dm2); - or by chemical nickel plating . possible deposit of a final metallic layer such as: gold, silver, copper .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
EP87107410A 1986-05-26 1987-05-21 Verfahren zur elektrolytischen Metallplattierung auf Titan Withdrawn EP0247525A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8607475A FR2599052B1 (fr) 1986-05-26 1986-05-26 Procede et depot metallique sur titane par voie electrolytique
FR8607475 1986-05-26

Publications (1)

Publication Number Publication Date
EP0247525A1 true EP0247525A1 (de) 1987-12-02

Family

ID=9335608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107410A Withdrawn EP0247525A1 (de) 1986-05-26 1987-05-21 Verfahren zur elektrolytischen Metallplattierung auf Titan

Country Status (7)

Country Link
US (1) US4787962A (de)
EP (1) EP0247525A1 (de)
JP (1) JPS6324094A (de)
CA (1) CA1311211C (de)
DK (1) DK265087A (de)
FR (1) FR2599052B1 (de)
NO (1) NO169353C (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5074970A (en) * 1989-07-03 1991-12-24 Kostas Routsis Method for applying an abrasive layer to titanium alloy compressor airfoils
USRE33800E (en) * 1989-07-03 1992-01-21 United Technologies Corporation Method for electroplating nickel onto titanium alloys
US4902388A (en) * 1989-07-03 1990-02-20 United Technologies Corporation Method for electroplating nickel onto titanium alloys
DE4224316C1 (en) * 1992-07-23 1993-07-29 Freiberger Ne-Metall Gmbh, O-9200 Freiberg, De Metal coating of titanium@ (alloys) - by oxidising in acidic, fluorine-free soln., removing oxide layer, treating with ultrasound, and galvanically coating
US9267218B2 (en) 2011-09-02 2016-02-23 General Electric Company Protective coating for titanium last stage buckets
CN103160892A (zh) * 2011-12-13 2013-06-19 贵州黎阳航空动力有限公司 一种钛合金镀银层的制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU176767A (de) *
JPS5110132A (de) * 1974-07-17 1976-01-27 Seiko Instr & Electronics

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632490A (en) * 1968-11-12 1972-01-04 Titanium Metals Corp Method of electrolytic descaling and pickling
US4127709A (en) * 1977-08-24 1978-11-28 Samuel Ruben Process for electro-plating nickel on titanium
US4412892A (en) * 1981-07-13 1983-11-01 The United States Of America As Represented By The Secretary Of The Army Pretreatment of superalloys and stainless steels for electroplating

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU176767A (de) *
JPS5110132A (de) * 1974-07-17 1976-01-27 Seiko Instr & Electronics

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 105, no. 8, 25 août 1986, page 545, résumé no. 68875f, Columbus, Ohio, US; E. KHOROZOVA et al.: "Effect of the preliminary treatment of the support on the electrocatalytic activity of platinized titanium electrode catalyst", & NAUCHNI TR. - PLOVDIVSKI UNIV. 1984, 22(1, KHIM), 129-36 *
CHEMICAL ABSTRACTS, vol. 85, no. 8, 23 August 1976, Columbus, Ohio, US; abstract no. 53733C, page 485; *

Also Published As

Publication number Publication date
NO872129L (no) 1987-11-27
JPS6324094A (ja) 1988-02-01
US4787962A (en) 1988-11-29
NO169353B (no) 1992-03-02
NO872129D0 (no) 1987-05-21
DK265087A (da) 1987-11-27
CA1311211C (fr) 1992-12-08
FR2599052A1 (fr) 1987-11-27
NO169353C (no) 1992-06-10
DK265087D0 (da) 1987-05-25
FR2599052B1 (fr) 1988-07-22

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Inventor name: ARTERO, BERNARD

Inventor name: TEMPRANO, SERGE