Effect of tensile stress on corrosion behavior of 13Cr martensitic stainless steel

ZHANG Hui-juan; ZHAO Mi-feng; ZHANG Lei; MA Lei; WANG Ya-wen; YUE Xiao-qi; LU Min-xu

doi:10.13374/j.issn2095-9389.2019.05.008

Volume 41 Issue 5

May 2019

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ZHANG Hui-juan, ZHAO Mi-feng, ZHANG Lei, MA Lei, WANG Ya-wen, YUE Xiao-qi, LU Min-xu. Effect of tensile stress on corrosion behavior of 13Cr martensitic stainless steel[J]. Chinese Journal of Engineering, 2019, 41(5): 618-624. doi: 10.13374/j.issn2095-9389.2019.05.008

Citation:

ZHANG Hui-juan, ZHAO Mi-feng, ZHANG Lei, MA Lei, WANG Ya-wen, YUE Xiao-qi, LU Min-xu. Effect of tensile stress on corrosion behavior of 13Cr martensitic stainless steel[J]. Chinese Journal of Engineering, 2019, 41(5): 618-624. doi: 10.13374/j.issn2095-9389.2019.05.008

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Effect of tensile stress on corrosion behavior of 13Cr martensitic stainless steel

doi: 10.13374/j.issn2095-9389.2019.05.008

1.
Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
2.
PetroChina Traim Oilfield Company, Korla 841000, China
3.
CRRC Beijing Locomotive Co., Ltd., Beijing 100072, China

More Information

Corresponding author: ZHANG Lei, E-mail: Zhanglei@ustb.edu.cn
Received Date: 2018-05-02
Publish Date: 2019-05-01

Abstract

Abstract

Tubes in deep wells are subjected to the mixed effects of the environment and stress and thus suffer many failures. Therefore, studying the corrosion of materials under stress deformation is necessary. This paper aims to investigate the effect of applied tensile stress on the dissolution of passive film and the repair mechanism of L80-13Cr martensitic stainless steel in solution of 80 g·L^-1 sodium chloride. Electrochemical tests were employed for measurements, where the main test measurements include open circuit potential (OCP), electrochemical impedance spectra (EIS), and potentiodynamic polarization tests. Contact angle measurement was combined with microscopic morphology analysis (Zoom stereo microscope) to investigate the surface activity. The test results show that there is the positive relation between applied tensile stress and the passivation characteristic of L80-13Cr martensitic stainless steel. Increase in the applied tensile stress negatively shifts the OCP value of L80-13Cr martensitic stainless steel, decreases the electron transfer resistance (R_t) and polarization resistance (R_p), and increases the rate of reaction; however, the passivation region significantly reduces, the passivation current density (E_corr) increases, and the self-corrosion current density decreases, which forms at a high potential. The results of contact angle test and microscopic morphology analysis show that the applied tensile stress reduces the surface contact angle and promotes the pitting of L80-13Cr martensitic stainless steel. Applied tensile stress can increase the surface energy of L80-13Cr martensitic stainless steel, promote the dissolution of the passivation film, and inhibit the regeneration of the passivation film; thus, it can deteriorate the corrosion resistance of materials.
- 13Cr stainless steel,
- tensile stress,
- passivation characteristic,
- surface activity

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References(19)

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