Pitting Behavior of 304 Stainless Steel in Simulated Condensate in Refining High Sulfur and Salt Heavy Oil

Abstract:

The pitting behavior of 304 stainless steel in the simulated condensate with different salt content (4 mg/L, 8 mg/L, 16 mg/L, 32 mg/L, 64 mg/L) and sulfur content (1.2 g/L, 2.5 g/L, 5 g/L) was studied using potentiodynamic polarization curve and static immersion methods. The simulated condensate was simulating the condensed water in the unit of refining heavy oil with high salt and high sulfur. The results showed that with the increase in chloride ions concentration, the pitting potential of 304 stainless steel decreased and the pitting sensitivity increased. The pitting sensitivity of 304 stainless steel also increased with the increase in sulfide ions concentration. In several experimental mediums, when the concentration of chloride ions and sulfide ions were 64 mg/L, 5 g/L respectively, the number and the size of corrosion pits both were the largest, the pitting behavior was the most serious.

• Periodical: Materials Science Forum (Volume 814)
• Pages: 249-255
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.814.249
• Online since: March 2015
• Authors: Xiao Hong Wang*, Xiao Hua Guo, Yuan Hua Lin, Ying Ying Li, Shu Liang Wang, Hai Lun Hu
• Keywords: 304 Stainless Steel, Pitting, Polarization Curves, Salt Content, Sulfur Content

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