公开(公告)号：KR810001966B1

公开(公告)日：1981-12-01

申请号：KR780002602

申请日：1978-08-26

Applicant: DIAMOND SHAMROCK CORP

Inventor： MALKIN I ,  BRANNAN J ,  BROWN C

IPC: C25D5/02 ,  C25D5/48

Abstract: The coating of 25-75% Ni/75-25% Zn alloy is electrodeposited by (a)cleaning and rinsing the cathode can, (b)immersing the can in a plating soln. contg. Ni and Zn ions, (c)immersing plating anodes in the can parallel to the cathode tubes(16), (d)passing d.c. between the tubes and anodes to deposit Ni-Zn alloy on the inside and outside of the tubes, and (e)removing the anodes and leaching the coating to remove at least some of the Zn. The method is used to produce active coatings on chloralkali cell cathodes to reduce the hydrogen discharge overpotential.

公开(公告)号：BR7804819A

公开(公告)日：1979-04-24

申请号：BR7804819

申请日：1978-07-26

Applicant: DIAMOND SHAMROCK CORP

Inventor： BROWN C ,  BRANNAN J ,  MALKIN I

IPC: C25B11/06 ,  C25B11/04 ,  C25B11/10 ,  C25D5/02 ,  C25D5/48 ,  C25D7/04 ,  C25D3/56 ,  C25B11/02 ,  C25B1/34

Abstract: An active metal coating which lowers the hydrogen discharge overpotential at the cathode in the electrolysis of aqueous alkali metal halide solutions is deposited on the cathode tubes of a cathode can of an electrolysis cell without the removal of the tubes from the can. Plating solution and anodes of plating metal are placed inside a cathode can and the components are electrically connected so as to deposit an active coating onto the cathode tubes. The plating metal is preferably an alloy of nickel and zinc and the process involves the final step of leaching the zinc component of the alloy deposit from the plated cathode tubes to provide a porous, active nickel surface which results in a reduction of the hydrogen discharge overpotential for the electrolysis of alkali metal halides, particularly sodium chloride.

公开(公告)号：ZA7804255B

公开(公告)日：1979-09-26

申请号：ZA7804255

申请日：1978-07-26

Applicant: DIAMOND SHAMROCK CORP

Inventor： BROWN C ,  MALKIN I ,  BRANNAN J

IPC: C25B11/06 ,  C25B11/04 ,  C25B11/10 ,  C25D5/02 ,  C25D5/48 ,  C25D7/04 ,  C25D ,  C25B

CPC classification number: C25D5/02 ,  C25B11/0447 ,  C25D5/48 ,  C25D7/04

公开(公告)号：PH13906A

公开(公告)日：1980-10-27

申请号：PH21449

申请日：1978-07-31

Applicant: DIAMOND SHAMROCK CORP

Inventor： MALKIN I ,  BRANNAN J ,  BROWN C

IPC: C25B1/24 ,  C25B1/26 ,  C25B11/00 ,  C25C7/02

公开(公告)号：ZA784255B

公开(公告)日：1979-09-26

申请号：ZA784255

申请日：1978-07-26

Applicant: DIAMOND SHAMROCK CORP

Inventor： BROWN C ,  MALKIN I ,  BRANNAN J

IPC: C25B11/06 ,  C25B11/04 ,  C25B11/10 ,  C25D5/02 ,  C25D5/48 ,  C25D7/04 ,  C25D ,  C25B

Abstract: An active metal coating which lowers the hydrogen discharge overpotential at the cathode in the electrolysis of aqueous alkali metal halide solutions is deposited on the cathode tubes of a cathode can of an electrolysis cell without the removal of the tubes from the can. Plating solution and anodes of plating metal are placed inside a cathode can and the components are electrically connected so as to deposit an active coating onto the cathode tubes. The plating metal is preferably an alloy of nickel and zinc and the process involves the final step of leaching the zinc component of the alloy deposit from the plated cathode tubes to provide a porous, active nickel surface which results in a reduction of the hydrogen discharge overpotential for the electrolysis of alkali metal halides, particularly sodium chloride.