Investigation of electrochemical corrosion behavior in a 3.5 wt.% NaCl solution of boronized dual-phase steel |
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| Affiliation: | 1. Department of Physics, Federal University of Ouro Preto, Ouro Preto, Brazil;2. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK;1. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China;2. Beijing Shougang Cold Rolling Co., Ltd., Beijing 101304, China;1. Material Science & Engineering Research Center, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;2. Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, 500 W University Avenue El Paso, TX 79968, USA;3. Tsinghua University, Key Laboratory of Advanced Material, School of Material Science and Engineering, Beijing 100084, China |
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| Abstract: | In this study, corrosion behaviors of boronized and non-boronized dual-phase steel were investigated with Tafel extrapolation and linear polarization methods in a 3.5 wt.% NaCl solution. Microstructure analyses show that the boride layer on the dual-phase steel surface had a flat and saw smooth morphology. It was detected by X-ray diffraction (XRD) analysis that the boride layer contained FeB and Fe2B phases. The amount of martensite increases with an increase in the intercritical annealing temperature. Both the amount of martensite and the morphology of the phase constituents have an influence on the corrosion behavior of dual-phase steel. A higher corrosion tendency was observed with an increased amount of martensite. The corrosion resistance of boronized dual-phase steel is higher compared with that of dual-phase steel. |
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