A real-time coupled multielectrode array sensor was used to measure the non-uniform corrosion of carbon steel material in a crude oil containing different amounts of brine solutions. Parallel immersion tests with carbon steel specimens in the crude oil were also conducted. The measurement results from the sensor and the results from immersion tests show that the crude-brine mixtures were not corrosive if there was no segregated phase of brine or water formed. However, the crude-brine mixture was highly corrosive when a segregated brine phase was present even in a small quantity. The measured results also show that, once initiated by even a small amount of suspended brine particulates, it took a long time for the corrosion to stop after the brine was homogeneously mixed with the crude oil.

Subject
Immersion tests, Sensors, Probes, Steel coupons, Mixtures, Sodium chloride solution, Solutions, Brines, Corrosion probes, Crude, Carbon steel, Electrodes, Oil
Keywords:
multielectrode sensor, corrosion monitoring, localized corrosion monitoring, corrosion in crude oil, real-time corrosion sensor, online corrosion monitoring
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).
2005
GOV
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