Corrosion behavior of 2205 duplex stainless steel in NaCl solutions containing sulfide ions. (15th May 2022)

• Record Type: Journal Article
• Authors: Xiao, Ying; Tang, Junlei; Wang, Yingying; Lin, Bing; Nie, Zhen; Li, Yunfei; Normand, Bernard; Wang, Hu
• Is Part Of: Corrosion science. Volume 200(2022)
• Publication Date: 2022-05-15
• Subjects: Duplex stainless steel -- PH -- Chloride -- Sulfide -- Pitting corrosion; DSS duplex stainless steel -- SCE saturated calomel electrode -- XPS X-ray photoelectron spectroscopy -- SEM scanning electron microscopy; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110240
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: The corrosion behavior of 2205 duplex stainless steel (DSS) in sulfide-containing NaCl solutions at different pH values are investigated. In 0.8 g/L NaCl solutions, the 2205 DSS pitting corrosion resistance increased with Na2 S addition. The pH has significant effects on the corrosion mechanism of 2205 DSS in a 35 g/L NaCl solution with sulfide. In 35 g/L NaCl solutions, addition of Na2 S can improve pitting resistance of 2205 DSS at pH 11.5, but the Na2 S addition promotes pitting corrosion at pH 9, 7 and 4. At pH 7, the pitting corrosion resistance of 2205 DSS is the worst with sulfide. Highlights: Pitting corrosion resistance of 2205 DSS increases in 0.8 g/L NaCl solution with Na2 S. Pitting corrosion resistance of 2205 DSS increases in 35 g/L NaCl solution of pH 11.5 with Na2 S. HS - weakens passive film of 2205 DSS in 35 g/L NaCl solution of pH 7. Anti-corrosion FeS2 film forms in 35 g/L NaCl solution of pH 4 with Na2 S.