Erosion/Corrosion of Duplex Stainless Steel in Sweet Production with Sand Versus CaCO3

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In the Oil and Gas industry, carbon steel tubing, piping and process equipment may be susceptible to erosion-corrosion damage due to the erosive and corrosive nature of the flow. To minimize the harsh effects and costly losses of erosion-corrosion, corrosion resistance alloys (CRAs) and corrosion inhibitors are commonly used. CRAs such as stainless steels, nickel and titanium alloys have excellent CO2 corrosion resistance.

Product Number: 51323-19394-SG

Author: Anass S. Nassef, Michael W. Keller, Siamack A. Shirazi

Publication Date: 2023

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Erosion-Corrosion behavior of 2507 duplex stainless steel was studied in a CO2 saturated environment (sweet production) as it was impinged by CaCO3 and sand particles. Experimental data were collected with the objective of investigating the performance of 2507 duplex stainless steel on mitigating CO2 corrosion in erosive environments. Pure erosion, pure corrosion and erosion-corrosion tests were conducted in a flow loop with a direct impingement configuration. Weight loss (WL) and electrochemical linear polarization (LPR) methods were utilized in this study. While WL method was used to measure erosion and total erosion-corrosion, LPR was used to measure pure corrosion and to monitor corrosion part of total erosion-corrosion. The erosivites of particles were characterized at low and high flow velocities. The flowing solution’s pH was monitored and maintained in the range from 4 to 5 throughout corrosion and erosion-corrosion tests. For the experimental conditions considered, pure erosion and erosion-corrosion data showed no synergism between erosion and corrosion.