Mitigating Erosion-Corrosion in CO2 environments Using Corrosion Resistance Alloys (C2026-00039)

Anass Nassef, Siamack Shirazi, Soroor Karimi

In the oil and gas industry, carbon steel is widely used for piping and process equipment materials due to its mechanical strength and low cost. Carbon steel, however, is vulnerable to erosion-corrosion damage caused by the erosive and corrosive nature of the flow. Solid particle erosion can intensify corrosion by stripping away protective layers such as iron carbonate scale and inhibitor films. This combined effect of erosion and corrosion can result in higher corrosion rates, surface pitting, and material failure.
A commonly utilized method to mitigate the harsh effects and costly losses of erosion-corrosion is the use of corrosion resistance alloys (CRAs). CRAs such as stainless steels, nickel alloys and titanium alloys offer excellent CO2 corrosion resistance. However, these materials can still be affected by depassivation-related mechanisms including erosion-corrosion.
Several studies have been conducted on the erosion-corrosion behavior of 13Cr-L80 stainless steel and its modified types. However, limited data is available for duplex stainless steel and nickel alloys. Therefore, the objective of this work is to investigate the protective properties of 2507 duplex stainless steel and Inconel 718 alloy in a CO2-saturated flow containing sand particles. This research data will enhance understanding of erosion-corrosion in CRAs and improve prediction models.