DEVICE AND METHOD FOR CONTROLLING AND MONITORING THE CORROSION BY USING A DIFFERENTIAL-RESISTIVE TRANSDUCER IN CONJUNCTION WITH REAL-TIME DATA ACQUISITION SYSTEM

摘要

The invention relates to a device and a method for controlling and monitoring the corrosion of heat exchanger surfaces within thermoenergetic installations. The claimed device comprises two metal tubular transducers (1 and 2) having the same size characteristics of the heat exchange surfaces (24) within the thermoenergetic installations (23), the first transducer (1), named witness transducer being entirely protected by being covered with an anticorrosion ceramic layer, and the second transducer (2) named sample transducer being protected only internally with an anticorrosion ceramic layer, each of the two transducers (1 and 2) being provided with two electrodes for supplying from a stabilized current source (15) and two electrodes for connection to a data acquisition system (17) connected at its turn both to a computer (18) for processing and displaying the data and to a warning system (22) which is activated when a pre-established value corresponding to the admissible maximal degree of corrosion of the heat exchange surfaces (24) of thermoenergetic installation (23) is reached. The claimed method consists in the differential (comparative) measurement of the resistors of witness and sample transducers within the claimed device, the resulting values of the measurements being acquired by the computer and used for calculating the penetration depth of the heat exchanger surfaces.