Title
EVALUATION OF CORROSIVITY OF MARINE
ATMOSPHERE BY ACM (ATMOSPHERIC CORROSION
MONITOR) TYPE CORROSION SENSOR
Author
Tadashi Shinohara
Abstract
An ACM (Atmospheric Corrosion Monitor) type corrosion sensor, consisted of a Fe-Ag galvanic
couple, was developed and applied in the evaluation of corrosivity of atmospheric environments.
The sensor was designed considering mass-production and good reproducibility of results,
making it convenient for long-term corrosion data acquisition. Besides the sensor’s output, I,
temperature, relative humidity (RH) were also recorded by a microcomputer. By analyzing the
magnitude and time variation of I, the occurrence and duration of rain, dew and dry periods, T rain ,
T dew and T dry , respectively, could be distinguished and determined. And by referencing to the
empirical I-RH calibrating curve, the amount of deposited sea salt, Ws, could also be estimated.