Metal working – Method of mechanical manufacture – Electrical device making
Patent
1982-02-26
1984-06-19
Lusignan, Michael R.
Metal working
Method of mechanical manufacture
Electrical device making
29825, 427113, 427115, 427125, 427226, 427379, 427380, 4273722, 427443, 429 44, 204290R, C25B 1104, C25B 1108
Patent
active
044546491
ABSTRACT:
Referring to FIG. 1, a method for making an improved electrode 15 having a gold coating 9 for use in the anode compartment 12 of a REDOX cell 10 is described. The anode fluid utilizes a chromic/chromous couple.
The flow chart FIG. 2 illustrates the method wherein a carbon felt is soaked in methanol, rinsed in water, dried and then heated in KOH after which it is again washed in deionized water and dried.
The felt is then moistened with a methanol-water solution containing chloroauric acid and is stored in a dark place while still in contact with the gold-containing solution.
After all the gold-containing solution is absorbed by the felt, the latter is dried by heat and then heat-treated at a substantially greater temperature. The felt is now suitable for use as an electrode and is wetted with water or up to 2 molar HCl prior to installation in a REDOX cell.
The two curves on the far right of FIG. 3 illustrate the low hydrogen evolution of the improved electrode.
REFERENCES:
patent: 3097974 (1963-07-01), McEvoy et al.
patent: 3212930 (1965-10-01), Thompson et al.
patent: 3310434 (1967-03-01), Kordesch
patent: 3316124 (1967-04-01), Kronenberg
patent: 3840407 (1974-10-01), Yao
patent: 3996064 (1976-12-01), Thaller
patent: 4029854 (1977-06-01), Walsh et al.
patent: 4104447 (1978-08-01), Walsh
patent: 4192910 (1980-03-01), Giner et al.
patent: 4215184 (1980-07-01), Gutmann et al.
Charleston Jo Ann
Jalan Vinod
Reid Margaret A.
Bueker Richard
Lusignan Michael R.
Mackin James A.
Manning John R.
Musial Norman T.
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