(19)
(11) EP 0 435 835 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.11.1991 Bulletin 1991/46

(43) Date of publication A2:
03.07.1991 Bulletin 1991/27

(21) Application number: 90830585.7

(22) Date of filing: 14.12.1990
(51) International Patent Classification (IPC)5: C25D 17/12, C25D 3/56
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 15.12.1989 JP 325562/89

(71) Applicants:
  • TANAKA KIKINZOKU KOGYO K.K.
    Chuo-ku Tokyo 103 (JP)
  • Furuya, Nagakazu
    Kofu-shi Yamanashi (JP)

(72) Inventor:
  • Furuya, Nagakazu
    Yamanashi (JP)

(74) Representative: Pellegri, Alberto et al
c/o Società Italiana Brevetti S.p.A. Via Puccini, 7
21100 Varese
21100 Varese (IT)


(56) References cited: : 
   
       


    (54) Process for electroplating zinc alloy and apparatus employed therefor


    (57) Disclosed herein are a process for electroplating a zinc alloy which comprises disposing in an electrolytic cell (10) a gas diffusion electrode apparatus (g) comprising a plurality of gas diffusion electrodes (1) which function as an anode and are formed by a gas diffusion layer (2) and a reaction layer (3) being attached together, and an electroconductive reinforcing frame (4) to which the gas diffusion electrodes (1) are supported; forming a zinc alloy plating bath on the reaction layer side of the electrolytic cell which functions as anode chamber; supplying electricity to the gas diffusion electrodes through the reinforcing frame while supplying a hydrogen gas to the electrolytic cell of the gas diffusion layer side; and electroplating a steel (16) with the zinc alloy by passing the steel as a cathode material through the zinc alloy bath; and an apparatus employed therefor.






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