Evaluation of Sucker Rods in Sour Environment

The objective of this study was to assess the relative importance of the main variables involved in the selection of steel sucker rods following ASTM G31 protocol. Corrosion rates of these steels were analyzed in three solutions: 100% carbon dioxide (CO2), 50% hydrogen sulfide (H2S)/50% CO2, and 100% H2S in the gas phase. The study examined the impact of shot-peening H2S content and alloying content on the corrosion rate of these carbon steels. The corrosion rates were subjected to statistical analysis, and a primary screening model was developed to identify the corrosion resistance of the alloyed carbon steels.