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Pitting corrosion of 316L stainless steel under low stress below yield strength

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Abstract

Pitting corrosion of 316L stainless steel (316L SS) under various stress was studied by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and Mott-Schottky (M-S) analysis in 3.5% NaCl solution. The results of polarization curves show that, with the increase of the stress, the pitting potentials and the passive current density markedly decrease fi rstly (180 MPa), and then increase greatly (200 MPa). The corresponding surface morphologies of the samples after the polarization test well correspond to the results. Mott-Schottky analysis proved the least Cl− adsorbed to the surface of passive fi lm with more positive fl at potential, indicating that a moderate stress could increase the pitting corrosion resistance of 316L SS in 3.5% NaCl solution.

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Authors and Affiliations

  1. Center of Corrosion & Protection, Science and Technology University Beijing, Beijing, 100083, China

    Shengjie Lü  (吕胜杰), Xuequn Cheng  (程学群) & Xiaogang Li

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  1. Shengjie Lü  (吕胜杰)
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  2. Xuequn Cheng  (程学群)
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  3. Xiaogang Li
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Correspondence to Xuequn Cheng  (程学群).

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Funded by the National Natural Science Foundation of China(No.50871020)

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Lü, S., Cheng, X. & Li, X. Pitting corrosion of 316L stainless steel under low stress below yield strength. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 27, 238–241 (2012). https://doi.org/10.1007/s11595-012-0444-0

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  • DOI: https://doi.org/10.1007/s11595-012-0444-0

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