Galvanic corrosion behavior and finite element simulation of overlaying welded nuclear steam turbine rotor

HUANG Yuhui; ZHANG Jianhui; HU Yulin; SUN Wenxuan; XU Yubin; WANG Yihao

doi:10.12073/j.hjxb.20210222003

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2021 > 42(8): 33-39. > DOI: 10.12073/j.hjxb.20210222003

HUANG Yuhui, ZHANG Jianhui, HU Yulin, SUN Wenxuan, XU Yubin, WANG Yihao. Galvanic corrosion behavior and finite element simulation of overlaying welded nuclear steam turbine rotor[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(8): 33-39. DOI: 10.12073/j.hjxb.20210222003

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Galvanic corrosion behavior and finite element simulation of overlaying welded nuclear steam turbine rotor

Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai 200030, China

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Received Date: February 21, 2021
Available Online: October 24, 2021

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Abstract

Abstract

The galvanic corrosion behavior of 25Cr2Ni2MoV overlaying welded nuclear steam turbine rotor was investigated by macro-electrochemical tests and immersion tests in chloride solution at 80 ℃. The results of electrochemical experiments show that the weld metal is the weak corrosion zone, and the corrosion potential from low to high is the heat-affected zone, the base metal, and the weld metal. The results of the immersion tests show that as the area of the BM increases, the average corrosion thickness of the WM gradually increases Furthermore, the galvanic corrosion finite element model of welded joint was established by using the electrochemical parameters obtained from macro electrochemical test. The results show that the finite element simulation results can effectively simulate the galvanic corrosion behavior of overlaying welding joint and provide galvanic corrosion rate prediction for actual production.
- welded joint,
- galvanic corrosion,
- finite element simulation,
- immersion test

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References (19)

References

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Galvanic corrosion behavior and finite element simulation of overlaying welded nuclear steam turbine rotor