Electrode and method of preparation thereof

Details Electrode and method of preparation thereof Electrode and method of preparation thereof

1995-09-21

1996-12-24

Bell, Bruce F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C25B 1108, C25B 1110

Patent

active

055870589

ABSTRACT:
An electrode for electrolysis of solutions of electrolytes comprising a support of passivated film forming metal or alloy thereof, having a composite coating consisting essentially of oxides of metals selected from the group consisting of iridium, ruthenium, titanium and tantalum having the molecular ratios (IrO.sub.2 +RuO.sub.2):TiO.sub.2 +Ta.sub.2 O.sub.5) is (1-19):(3-1) wherein IrO.sub.2 :RuO.sub.2 is (24-4):1, and TiO.sub.2 :Ta.sub.2 O.sub.5 is 1:(0-0.05). The electrodes are of particular use as anodes in the production of chlorine and alkali, electrosynthesis of chlorates and hypochlorites, electrolysis of sea and waste water and cathodic protection. The electrodes have improved corrosive resistant to alkaline solutions and have improved interface stability to oxidation and blocking.

REFERENCES:
patent: 3948751 (1976-04-01), Bianchi et al.
patent: 4070504 (1978-01-01), Bianchi et al.
patent: 4331528 (1982-05-01), Beer et al.
patent: 4469581 (1984-09-01), Asano et al.
patent: 4564434 (1986-01-01), Busse-Machukas et al.
patent: 5334293 (1994-08-01), Cairns et al.

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