A real time electrochemical noise corrosion monitoring field trial was conducted at the Cahn 3 Water Treatment Plant in Lost Hills, California in late 1995. Five corrosion-monitoring probes were installed at different locations in the plant that had a history of weight loss corrosion between 0.5 to 450 mils per year (mpy).
The five-element probes simultaneously performed Linear Polarization Resistance (LPR) and Electrochemical Noise (EN) measurements. Instantaneous and time averaged corrosion rates were calculated and recorded along with various other statistically relevant parameters for each probe. While absolute measurements of corrosion rates differed from weight loss measurements made on probe elements by factors of between...