Multi-sensor monitoring of the corrosion rate and the assessment of the efficiency of a corrosion inhibitor in utility water installations

This paper presents an implementation of the monitoring of the corrosion rate and the assessment of the efficiency of a corrosion inhibitor in a utility water installation using an automated corrosion monitoring system. Due to the fact that the corrosion inhibitor was added to water intended for human consumption, it was necessary to build a multi-sensor monitoring system. In order to implement corrosion monitoring using a linear polarization and resistometric methods, the system was subjected to lab testing, which allowed for determining the commensurability of measurements using both techniques. Based on the research, an automatic utility water monitoring system was implemented, both before and after the application of an inhibitor. The research has shown, that the inhibitor, when used, is effectively limiting the corrosion rate, though the characteristics of the measurement require a detailed analysis of the changes in the corrosion rate as a function of time and water temperature fluctuations. (C) 2013 Elsevier B.V. All rights reserved.