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Journal of Chinese Society for Corrosion and protection  2020, Vol. 40 Issue (6): 523-528    DOI: 10.11902/1005.4537.2019.207
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Corrosion Behavior of 17-4 PH Stainless Steel in Simulated Seawater Containing SRB
MA Mingwei1, ZHAO Zhihao2, JING Siwen1, YU Wenfeng1, GU Yien1, WANG Xu1(), WU Ming2
1. School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China
2. College of Petroleum Engineering, Liaoning Shihua University, Fushun 113001, China
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The effect of sulfate-reducing bacteria (SRB) and applied stress on the corrosion behavior of 17-4 PH stainless steel was studied in a simulated marine solution inoculated with SRB. The stress-strain curves and fracture morphology were analyzed to acquire the differences in corrosion behavior induced by sterile solution and SRB inoculum solution respectively. The results showed that the ISCC values were increased by 5.2%, 9.3%, and 4.4% in the SRB-inoculated solution for the steels subjected to single stage aging, double stage aging and tempering treatments respectively. The corrosion product of FeS enhances the anodic dissolution process and accelerates the corrosion reaction. Double stage aging treated steels are more sensitive to SRB due to the microstructure of coarse martensite, facilitating the entry and accumulation of hydrogen. The stress corrosion cracking (SCC) mechanism for single stage aging and tempering treated steels may be ascribed to the anodic dissolution (AD), while the double-stage aging treated steel may be due to the hydrogen induced cracking (HIC).

Key words:  17-4 PH stainless steel      heat treatment      strain      SRB      stress corrosion cracking     
Received:  11 November 2019     
ZTFLH:  TG172.5  
Fund: National Natural Science Foundation of China(51574147)
Corresponding Authors:  WANG Xu     E-mail:

Cite this article: 

MA Mingwei, ZHAO Zhihao, JING Siwen, YU Wenfeng, GU Yien, WANG Xu, WU Ming. Corrosion Behavior of 17-4 PH Stainless Steel in Simulated Seawater Containing SRB. Journal of Chinese Society for Corrosion and protection, 2020, 40(6): 523-528.

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Table 1  Chemical composition of 17-4 PH stainless steel (mass fraction / %)
Fig.1  Dimensions of test specimen (a) and schematic diagram of test vessel for SCC experiment (b)
Fig.2  Microstructures of 17-4 PH stainless steel treated by different processes of single-aging (a), double-aging (b) and quenching and tempering (c)
Fig.3  Stress-strain curves of samples A (a), B (b) and C (c) in different conditions and their reductions of area (d)
Table 2  ISCC values of samples with different heat treatments in sterile and SRB-inoculated solutions
Fig.4  Fracture morphologies of 17-4 PH stainless steel samples with heat treatments of single-stage aging (a, d), double-stage aging (b, e) and quenching and tempering (c, f) in sterile solution (a~c) and SRB-inoculated solution (d~f)
Fig.5  Lateral fracture morphologies of 17-4 PH stainless steel samples with different thermal treatments in SRB-inoculated solution: (a) single-stage aging, (b) double-stage aging, (c) quenching and tempering
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