Detection of imperfections in the inert coating of a rotating me

Details Detection of imperfections in the inert coating of a rotating me Detection of imperfections in the inert coating of a rotating me

1990-08-23

1992-06-02

Snow, Walter E.

Electricity: measuring and testing

For insulation fault of noncircuit elements

G01B 3112

Patent

active

051190320

ABSTRACT:
A method and apparatus for testing, in situ, for imperfections in an inert coating of a moving metal component of an apparatus (e.g. a metal basket of a centrifuge) involves covering the inert coating with an electrically conductive liquid, applying an electrical voltage across the inert coating while the apparatus is operational, monitoring the current or applied voltage, and utilizing the measured current or voltge to provide an indication of the condition of the inert coating. If the coating is defective, the conductive liquid will find its way into any flaws or imperfections, thereby providing a path of lower electrical resistance.

REFERENCES:
patent: 4188267 (1980-04-01), Gaud et al.
patent: 4240878 (1980-12-01), Carter
patent: 4543525 (1985-09-01), Borytra et al.
patent: 4558273 (1985-12-01), Nishimara
patent: 4584521 (1985-02-01), Gaud et al.
Industrial Laboratory, vol. 53, No. 2, Feb., 1987.
Patent Abstracts of Japan, vol. 9, No. 109 (P380) (1922).

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