Method and apparatus for analyzing the state of protection again

Details Method and apparatus for analyzing the state of protection again Method and apparatus for analyzing the state of protection again

1991-12-26

1994-06-07

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204147, 204196, C23F 1304

Patent

active

053186788

ABSTRACT:
A study is made of the changeover time of the voltage between an electrode and a metal work piece buried in the ground and protected against corrosion by an electric current. For this study, it is intended momentarily to interrupt the circulation of the protective current, to read the voltage between the work piece and the electrode, to pass these readings to an analog filter, to smooth these filtered signals by substituting them with values corresponding to a continuous and monotonic postulated function, and then to mathematically reconstruct the change in the voltage signals between the work piece and electrode such as it would be without filtering.

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Chen, Chi-Tsong, "System And Signal Analysis", New York, 1989, Saunders College Publishing, pp. 164-166 and 314-317.
Extended Abstracts, vol. 84, No. 2, Oct. 1984, Princeton, N.J., p. 265, D. Britz, "The Use of a Computer in the Corrosion Laboratory".
Electrochem. Corrosion Testing, F. Mansfeld, et al. EDS 1981, pp. 110-149; "Electrochem. Impedance Techniques . . . " D. D. MacDonald, et al., pp. 139, 1.10, 140.
Journal of the Electrochemical Society, vol. 130, No. 12, Dec. 1983, Manchester, N.H., pp. 2329-2334, M. Rosen, et al. "Tafel Constants and Changes in Hydrogen . . . ".

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