EMBEDDABLE CORROSION RATE METERS FOR REMOTELY MONITORING STRUCTURES

WIPO Patent Application WO2004010104

A9

An embeddable corrosion rate meter (ECRM) for detecting and measuring corrosion in metal and concrete structures comprises an electrochemical cell with an ECRM sensor circuit (20). Circuit (20) includes at least one working electrode (10) evenly spaced from counter/reference electrode (12) with the separation distance between the electrodes determining an electrolyte medium resistance. Circuit (20) also includes a current source generated by power source (28) connected through different resistances R1 (26) to Rn (24). A first selector is used in applying current through each or the plurality of resistances to working electrode (10) and a second selector (16) selects a duration of the current pulse. Current is applied between the electrodes through galvanostat (22) and polarization of working electrode (10) is measured by volmeter /A-D converter (18) connected via link (34). The volmeter has an input impedance greater than a billion ohms. An external reader-head with power link (32) powers circuit (20) and reads and transfers corrosion measurement data via data link (36) to computer (30).

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JP2018009806	EVALUATION METHOD OF CORROSION RESISTANCE IMPROVEMENT PROCESSING EFFECT

SRINIVASAN RENGASWAMY (US)
SAFFARIAN HASSAN M (US)
PHILLIPS TERRY E (US)

PCT/US2003/022606

April 29, 2004

July 18, 2003

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UNIV JOHNS HOPKINS (US)
SRINIVASAN RENGASWAMY (US)
SAFFARIAN HASSAN M (US)
PHILLIPS TERRY E (US)

G01N17/02; (IPC1-7): G01N17/04; G01N17/02

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