Acidic Corrosion Behavior of Slag-free Self-shielded Flux-cored Arc Welding Overlay

DOI Web Site 参考文献27件
  • Liu Dashuang
    School of Material Science and Engineering, Hefei University of Technology Zhengzhou Research Institute of Mechanical Engineering Co., Ltd.
  • Wei Ping
    School of Material Science and Engineering, Jiangsu University of Science and Technology
  • Long Weimin
    Zhengzhou Research Institute of Mechanical Engineering Co., Ltd. China Innovation Academy of Intelligent Equipment (Ningbo) Co., Ltd
  • Wu Yucheng
    School of Material Science and Engineering, Hefei University of Technology
  • Wang Rui
    School of Material Science and Engineering, Jiangsu University of Science and Technology

抄録

<p>The corrosion resistance of slag-free self-shielded flux-cored welding overlays with different ferrotitanium (Fe–Ti) additions in 3.5 wt.% NaCl + 0.01 mol/L HCl acidic solution was investigated. The corrosion occurs in the matrix rather than M7(C, B)3, M3(C, B) and TiC in the microstructure of all the welding overlays. The corrosion resistance of hypereutectic welding overlay is decreased when the Fe–Ti addition is increased from 0 wt.% to 12 wt.%. The corrosion resistance of the welding overlay is the lowest since the overlay is a eutectic structure at the Fe–Ti addition of 12 wt.%. The eutectic structure increases the interface of corrosion reaction, which accelerates the corrosion rate and increases the corrosion current. With the Fe–Ti addition increasing from 12 wt.% to 24 wt.%, the corrosion resistance of the welding overlays with hypoeutectic structure is gradually increased, owing to the increase of the proportion of TiC and chromium content in the matrix.</p>

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