EFFECT OF USSP DURATION ON CORROSION BEHAVIOR OF 5Cr–0.5Mo STEEL IN H2S MEDIUM

Wenbin Xu, Minggang Liao and Yan Li
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Wenbin Xu: Anhui Vocational and Technical College, Hefei, Anhui 230011, P. R. China
Minggang Liao: ��Nanjing Tech University, Nanjing, Jiangsu 211816, P.R. China
Yan Li: Anhui Vocational and Technical College, Hefei, Anhui 230011, P. R. China

Surface Review and Letters (SRL), 2022, vol. 29, issue 12, 1-8

Abstract: The flow accelerated corrosion of H2S media widely exists in chemical equipment and chemical pipe fittings. It can lead to equipment failure and cause safety accidents. In this paper, ultrasonic shot peening (USSP) was used to realize surface nanocrystallization of the 5Cr–0.5Mo steel specimens. It was found that strong plastic deformation occurred on the surface of the specimen, and dense nanoscale corrosion product film was formed. A closed flow accelerated corrosion test device with H2S media was used to test the corrosion of the specimens. The experimental results showed that the corrosion current density of the specimen was decreased, the corrosion potential was increased, and the corrosion resistance was enhanced. However, with the increase of USSP duration, the density of the corrosion product film formed on the surface of the specimen was decreased, and the corrosion rate of the specimen was increased.

Keywords: USSP duration; material nanocrystallization; flow accelerated corrosion (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22501566

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