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Effect of temperature and Cl− concentration on pitting of 2205 duplex stainless steel

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Abstract

The electrochemical behaviors of 2205 duplex stainless steel in NaCl solution with different temperatures and concentrations were studied by gravimetric tests, potentiodynamic polarization, electrochemical impedance spectroscopy and scanning electron microscopy. The experinental results show that temperature and chloride concentration have a great influence on the pitting resistance of 2205 duplex stainless steels. They not only effect the corrosion rate of pitting, but also change the shape of the pits. When NaCl solution was in low concentration and temperature below the critical pitting temperature, pits were very small and scattered with hemisphere-like shape. On the contrary, the pits of 2205 duplex stainless steel were large and sometimes had a lacy cover when the NaCl concentration was higher and the temperature was 70°C.

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Authors and Affiliations

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

    Chaofang Dong  (董超芳), Hong Luo, Kui Xiao, Ting Sun, Qian Liu & Xiaogang Li

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  1. Chaofang Dong  (董超芳)
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  2. Hong Luo
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  3. Kui Xiao
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  4. Ting Sun
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  5. Qian Liu
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  6. Xiaogang Li
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Corresponding author

Correspondence to Chaofang Dong  (董超芳).

Additional information

Funded by the National Program for Basic Conditions Platform (No.2005DKA10400) and the National Science Foundation of China (No. 50771020)

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Dong, C., Luo, H., Xiao, K. et al. Effect of temperature and Cl− concentration on pitting of 2205 duplex stainless steel. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 26, 641–647 (2011). https://doi.org/10.1007/s11595-011-0283-4

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  • DOI: https://doi.org/10.1007/s11595-011-0283-4

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