The influence of chromium content on the electrochemical behavior of weathering steels |
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| Affiliation: | 1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;2. College of Sciences, Northeastern University, Shenyang 110004, China;1. Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;2. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan, 114021, China;3. China Communications Construction Company Highway Consultants CO., Ltd. (HPDI) Beijing, 100083, China;1. National Centre for Metallurgical Research (CENIM/CSIC), Avda. Gregorio del Amo 8, 28040 Madrid, Spain;2. LAPA: SIS2M and NIMBE UMR3299 CEA/CNRS and IRAMAT UMR5060 CNRS, CEA Saclay, 91191 Gif sur Yvette cedex, France;1. Corrosion and Protection Centre, University of Science and Technology Beijing, Beijing 100083, China;2. Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Zhejiang 315201, China |
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| Abstract: | To investigate the influence of chromium content on corrosion characteristics of weathering steels, the electrochemical measurements were performed on the steels containing 0–9% Cr (wt.%) in NaHSO3 aqueous solution. The results indicated that the open circuit potential of these steels shifted to the positive direction remarkably, because the additions of Cr improved the passivation capability of the steels. The corrosion current density of the steels containing more than 7% Cr (wt.%) decreased significantly after pre-rusted treatment, implying the corrosion resistance could be enhanced by the formation of protective goethite rust layer. |
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| Keywords: | A Low alloy steel C Rust C Atmospheric corrosion |
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