Influence of corrosion on the interface between zinc phosphate steel fiber and cement

Authors

  • M. Sun,

    Corresponding author
    1. Institute of Material and Chemical, Soochow University, Moye Road, Suzhou 215006 (P R China)
    2. Institute of Civil Engineering, Suzhou University of Science and Technology, Binhe Road, Suzhou 215011 (P R China)
    • Institute of Material and Chemical, Soochow University, Moye Road, Suzhou 215006 (P R China).
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  • D.-J. Wen,

    1. Institute of Material and Chemical, Soochow University, Moye Road, Suzhou 215006 (P R China)
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  • H.-W. Wang

    1. Institute of Material and Chemical, Soochow University, Moye Road, Suzhou 215006 (P R China)
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Abstract

The interface bond between steel fibers and concrete matrix is a key factor influencing bearing capacity of steel fiber reinforced concrete (SFRC). In order to improve the interface bond strength and corrosion resistance, a kind of method was put forward by depositing zinc phosphate (ZnPh) coating on steel fiber surface in this paper. The corrosion behavior was investigated in 5% NaCl solution by using linear polarization measurement. Microstructure analysis (SEM and EDX) and fiber pull-out test in combination with linear polarization measurement were carried out. The results prove that ZnPh coatings fabricated on the carbon steel surface can not only protect steel fiber against corrosion, but also enhance the mechanical interlocking bonds between fibers and matrix.

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