Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1989-03-23
1990-09-18
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
20415311, G01N 1702
Patent
active
049581309
ABSTRACT:
An evaluation method of corrosion of a steel material in a concrete. The evaluation is made by use of three parameters, i.e., the corrosion potential, the polarization resistance and the concrete resistance measured for plurality of measuring points on the concrete over the steel material. The values of polarization resistance and the concrete resistance are used after converting them to the value per unit area and unit length, thereby quantitative absolute evaluation being made without depending on the ambient conditions. The measured values of each parameter are classified to several zones by threshold value, and the results thereof are collectively took into consideration for the evaluation. The parameters and/or the threshold values are compensated in connection with temperature in view of accuracy.
REFERENCES:
patent: 4080565 (1978-03-01), Polak et al.
patent: 4130464 (1978-12-01), Kanno et al.
patent: 4217544 (1980-08-01), Schmidt
patent: 4575678 (1986-03-01), Hladky
patent: 4587479 (1986-05-01), Rhoades et al.
Mochizuki Noriyasu
Nakauchi Hiroji
Eisenzopf Reinhard J.
Nakagawa Corrosion Protecting Co., Ltd.
Regan Maura K.
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