CONTROL SYSTEM FOR MONITORING ETCHING AND CORROSION PREVENSION

摘要

PURPOSE:To develop a control system for monitoring the corrosion prevention of a metallic material by measuring continuously the corroding rate of the metallic material under corrosive environment and the environmental factor for corrosion and controlling the environmental factor for corrosion in accordance with the correlation thereof. CONSTITUTION:The reference value of an etching rate of a metallic material 2 in a corrosion medium 1 is preliminarily stored in an arithmetic device 6. An environmental factor is measured by a device 5 for measuring the environmental factor from the detection signal emitted by an element 3 for measuring the environmental factor. The correlation between the environmental factor value measured by the device 5 and the corroding rate measured by a device 4 for measuring the corroding rate is calculated by an arithmetic device 6 from both values and the relation therebetween is monitored. An operating part for the environmental factor is further controlled to return the changed environmental factor to the original factor by feeding back the measured value of the environmental factor changed conisiderably from a stationary value in the correlation with the corrding rate to an environment control device 7, thereby maintaining the effect of preventing corrosion of the material 2 under the corrosive environment.