Electrochemical noise measurement technique for the determinatio

Details Electrochemical noise measurement technique for the determinatio Electrochemical noise measurement technique for the determinatio

1991-05-26

1992-09-29

Weisstuch, Aaron

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204404, 324 712, 324700, G01N 1702

Patent

active

051511630

ABSTRACT:
A technique is disclosed for using electrochemical noise (ECN) to charactze halide pitting reactions on a high strength aluminum alloy. ECN signals resulting from the pitting interaction of an aqueous halide solution with the oxide film on the aluminum alloy sample are measured. The signals are amplified, digitized, and then transferred to a digital computer where they are transformed from the time domain to the frequency domain by a fast Fourier transform function. Frequency spectrum amplitude data is then converted to a log-log scale thereby revealing a pattern of spectrum amplitudes indicative of pit initiation rates.

REFERENCES:
patent: 3878064 (1974-04-01), Weisstuch et al.
patent: 4575678 (1986-03-01), Hladky

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