Method of degreasing anode cups

Details Method of degreasing anode cups Method of degreasing anode cups

1997-06-11

1999-10-26

El-Arini, Zeinab

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

134 26, 134 29, 134 40, 134 2214, 134 2219, B08B 304, B08B 312, C23G 506

Patent

active

059721227

ABSTRACT:
A method of degreasing an anode cup used in a zero-mercury, zinc air electrochemical cell involves contacting the anode cup with an aqueous detersive system containing one or more surfactants and which is subjected to an ultrasonic field. After being immersed in the detersive system for a suitable period of time, the anode cups are rinsed, preferably in an ultrasonic field, and dried. The resulting anode cups have lower levels of impurities, and lower levels of oxygen atoms on the surface, which provide a more hydrophobic surface containing lower levels of water and hydroxyl groups. Zinc air cells prepared from the anode cups degreased in accordance with the method of this invention exhibit less hydrogen gassing and improved performance characteristics.

REFERENCES:
patent: 3842487 (1974-10-01), Hartz
patent: 5279905 (1994-01-01), Mansfield, Jr. et al.
patent: 5464477 (1995-11-01), Awad
Metals Handbook, Ninth Edition, vol. 5--Surface Cleaning, Finishing and Coating, American Society for Metals, Metals Park, OH, 1985, pp. 3-21.

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