BIMETALLIC ECN SENSOR FOR MONITORING INHIBITOR EFFICIENCY IN WATERBASED HYDRAULIC FLUIDS

摘要

The "Coulombs Counting" method, a new versatile electrochemical noise (ECN) data evaluation method, has been successfully applied to evaluate the efficiency of corrosion inhibitor packages in concentrates for water based hydraulic fluids (HFA fluids) for underground mining or tunnel work. It was demonstrated that not only pairs of "identical" electrodes can be used for ECN systems diagnostics but also bimetallic couples, e.g. steel / bronze. Such electrode systems are currently used for optimization of additive packages and online-monitoring of inhibitor efficiency and quality assurance of HFA fluids under service conditions in underground mining.