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| Corrosion Resistance and Antifouling Performance of Copper-bearing Low-carbon Steel in Marine Environment |
LIU Hongyu, ZHANG Xiqing, TENG Yingxue, LI Shengli( ) |
| School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China |
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Abstract A novel Cu-bearing low-carbon steel 0Cu2Cr (with 2.5%Cu) was independently designed and developed, then the corrosion resistance and antifouling performance of 0Cu2Cr carbon steel and the ordinary weathering steel Q345 steel in natural seawater and the SRB culture medium were comparatively investigated. The results show that the corrosion potential and impedance loop diameters of 0Cu2Cr steel are both greater than, and the corrosion current density is less than those of Q345 steel, namely the 0Cu2Cr steel presents significantly better corrosion resistance, which may be ascribed to that the presence of Cu in 0Cu2Cr steel can promote the transformation of γ-FeOOH to the more stable α-FeOOH in the rust layer, hence the rust layer became denser, meanwhile the enriched copper and the precipitated Cr could form complex oxides such as Cu2Cr2O4, which are adsorbed around the rust layer, so that reduce the conductivity of the rust layer. As a result, the 0Cu2Cr steel presents good corrosion resistance. On the other hand, the Cu-rich phase in carbon steel can lead to SRB apoptosis, so that 0Cu2Cr steel has good antifouling properties.
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Received: 24 November 2020
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| Fund: National Key R&D Program of China(2017YFB0304201);National Natural Science Foundation of China(51974155);State Key Laboratory of Marine Equipment Made of Metal Material and Application(SKLMEA-USTLN 201902);University of Science and Technology Liaoning Graduate Science and Technology Innovation Project(LKDYC202002) |
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Corresponding Authors:
LI Shengli
E-mail: Lishengli@ustl.edu.cn
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About author: LI Shengli, E-mail: Lishengli@ustl.edu.cn
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