Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1997-06-03
1998-02-03
Bell, Bruce F.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204431, 204432, G25B 1100
Patent
active
057140464
ABSTRACT:
A sensing surface for a sensing cathode electrode useful in electrochemical gas sensors for sensing active gases in a gas mixture. The gas sensors are utilized in sensing oxygen or exhaust gases from a motor vehicle, so that there is a potential for causing deposits on the sensing surface of the electrode of either lead oxide species or lead carbonate thereon. The sensing surface is plated with rhodium or platinum for rejecting or prolonging the formation of any of the deposits thereon leading to an increase in rated life for the gas sensor greater than heretofore thought possible.
REFERENCES:
patent: 3429796 (1969-02-01), Lauer
patent: 3767552 (1973-10-01), Lauer
patent: 4077861 (1978-03-01), Lauer
patent: 4477316 (1984-10-01), Sakai et al.
ASTM Standard Practise for Cleaning Metal prior to Electroplating, Designation B 322-68, 1979, pp. 151-161.
ASTM Standard Specification for Electrodeposited Coatings of Rhodium for Engineering Use, Designation B634-78, May 1978, pp. 504-506.
ASTM Standard Practise for Preparation of Copper and Copper-Base Alloys for Electroplating & Conversion Coatings pp. 110-113, Nov. 1982.
ASTM Standard Guide for Autocatalytic Nickel Deposition on Metals for Engineering Use, pp. 528-535, May 1979.
ASTM Standard Practise for Preparation of Nickel for electroplating with Nickel, pp. 175-177, Apr. 1979.
Akmal Naim
Lauer Jay M.
Bell Bruce F.
DaRin Edward J.
Teledyne Industries Inc.
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