Electrochemical and Corrosion Behavior of Stainless Steel 316L in Sulfiran Process

Document Type : Research Paper

Authors

1 Industrial Protection Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran

2 Gas science Department, Research Institute of Petroleum Industry (RIPI), Tehran, Iran

3 Engineering and Process Development Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran

Abstract

In this paper, the corrosion behavior of stainless steel 316L was evaluated in used catalyst solution in Sulfiran plant in temperature range of 35-45 °C. The electrochemical techniques consisted of polarization curves and electrochemical impedance spectroscopy (EIS) were used in laboratory tests. It was found that the corrosion rate of stainless steel 316L alloy was less than 1 mpy in this process. In the meantime, there was low possibility of pitting corrosion on stainless steel 316L. The weight loss technique was used for the determination of corrosion rate in pilot tests. In addition, surface analysis techniques such as XRD, XRF, and SEM were applied in this research. The evaluations of microstructure of stainless steel 316L were also carried out. The results of pilot tests confirmed the findings of laboratory tests. While inclusions were present in alloy stainless steel 316L microstructure, the investigation of metallurgical aspect of the mentioned alloy showed negligible uniform corrosion damage.
 

Keywords

References

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Journal of Petroleum Research
Volume 23, Issue 76 - Serial Number 76
January and February 2014
Pages 80-91

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