Corrosion sensors and electrochemistry-based corrosion measurement technology were used to study internal corrosion of environments similar to those in natural gas transmission pipelines. Field tests were conducted at a gas gathering site. Test locations were selected in environments consisting of dry/moist natural gas and the hydrocarbon/water mixture removed from natural gas. Sensors were made using A106 pipeline steel in the form of flange probes. Linear polarization resistance, electrochemical noise, and harmonic distortion analysis were used to measure corrosion rates, Stern-Geary constants, and pitting factors. Results show that the measurements were sensitive enough to detect small rates of corrosion in the selected environments.

Subject
Humidity, Water, Sensors, Piping, Corrosion rate, Transmission pipelines, Pipelines, Flanges, Mixtures, Natural gas, Corrosion data, Linear polarization resistance, Pitting factor
Keywords:
corrosion, natural gas, hydrocarbon/water mixture, electrochemical noise, harmonic distortion analysis, linear polarization resistance, Stern-Geary constant, gas transmission pipeline
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2004
GOV
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