Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Erosion
Patent
1992-02-20
1993-06-22
Harvey, Jack B.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Erosion
324693, 324700, 324707, 324721, 427 8, G01N 2702, G01R 2716
Patent
active
052218937
ABSTRACT:
In a method of diagnosing deterioration of a paint film, a probe is applied to the surface of a paint film. A voltage having a predetermined waveform is applied by a preamplifier across the probe and a base metal on which the paint film is formed. A current flowing through the paint film is measured by the preamplifier. An analog signal indicative of a measured current value is converted to a corresponding digital signal by an analog-to-digital converter. A personal computer operates to analyze the digital signal in accordance with a predetermined analyzing procedure so that the degree of deterioration of the paint film is determined. The resultant determination is displayed on the display.
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Tooru Tsuru, "AC Impedance Method and Its Application to Corrosion and Corrosion Prevention," Rust Prevention Control, vol. 11, 1986, pp. 13-19.
Kondou Takeshi
Yamamoto Sumio
Brown Glenn
Harvey Jack B.
Kabushiki Kaisha Toshiba
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