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Effect of a grain-refined microalloyed steel substrate on the formation mechanism of a tight oxide scale

Journal Article


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Abstract


  • The formation mechanism of tight oxide scale on the microalloyed steel was investigated at temperatures of 550–850 °C in dry air. Microstructural characterisations reveal that the spallation of oxide scale dominates at the centre of coarse grains on the oxidation initiation. The fine-grained steel improves the adhesive properties of oxide scale by enhanced grain-boundary diffusion. The lower activation energy and higher oxidation rate accelerate cation/anion migration along grain boundaries, leading to high magnetite content in the oxide scale. The approach by grain refinement at initial oxidation has been proposed to generate the pickle-free tight oxide scale.

Authors


  •   Yu, Xianglong (external author)
  •   Jiang, Zhengyi
  •   Zhao, Jingwei
  •   Wei, Dongbin
  •   Zhou, Cunlong (external author)
  •   Huang, Qingxue (external author)

Publication Date


  • 2014

Citation


  • Yu, X., Jiang, Z., Zhao, J., Wei, D., Zhou, C. & Huang, Q. (2014). Effect of a grain-refined microalloyed steel substrate on the formation mechanism of a tight oxide scale. Corrosion Science, 85 115-125.

Scopus Eid


  • 2-s2.0-84901618400

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3968&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2959

Number Of Pages


  • 10

Start Page


  • 115

End Page


  • 125

Volume


  • 85

Abstract


  • The formation mechanism of tight oxide scale on the microalloyed steel was investigated at temperatures of 550–850 °C in dry air. Microstructural characterisations reveal that the spallation of oxide scale dominates at the centre of coarse grains on the oxidation initiation. The fine-grained steel improves the adhesive properties of oxide scale by enhanced grain-boundary diffusion. The lower activation energy and higher oxidation rate accelerate cation/anion migration along grain boundaries, leading to high magnetite content in the oxide scale. The approach by grain refinement at initial oxidation has been proposed to generate the pickle-free tight oxide scale.

Authors


  •   Yu, Xianglong (external author)
  •   Jiang, Zhengyi
  •   Zhao, Jingwei
  •   Wei, Dongbin
  •   Zhou, Cunlong (external author)
  •   Huang, Qingxue (external author)

Publication Date


  • 2014

Citation


  • Yu, X., Jiang, Z., Zhao, J., Wei, D., Zhou, C. & Huang, Q. (2014). Effect of a grain-refined microalloyed steel substrate on the formation mechanism of a tight oxide scale. Corrosion Science, 85 115-125.

Scopus Eid


  • 2-s2.0-84901618400

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3968&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2959

Number Of Pages


  • 10

Start Page


  • 115

End Page


  • 125

Volume


  • 85