Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Solid Particle Erosion Properties of Hot-Dip Aluminized Economizer Steel Tube

용융 알루미늄 도금된 절탄기 강재 튜브의 고상입자 침식 특성

  • Park, Il-Cho (Division of Cadet Training, Mokpo Maritime University) ;
  • Han, Min-Su (Division of Marine Engineering, Mokpo Maritime University)
  • 박일초 (목포해양대학교 승선실습과정부) ;
  • 한민수 (목포해양대학교 기관시스템공학부)
  • Received : 2021.11.19
  • Accepted : 2021.11.24
  • Published : 2021.12.31
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Abstract

In this paper, durability evaluation and surface damage mechanism were investigated through solid particle erosion (SPE) test after applying hot-dip aluminizing (HDA) technology for the purpose of maintenance of marine economizer tube. Damaged surface shape was analyzed using SEM and 3D microscope. Compositional changes and microstructure of the HDA layer were analyzed through EDS and XRD. Durability was evaluated by analyzing weight loss and surface damage depth after SPE. HDA was confirmed to have a two-layer structure of Al and Al5Fe2. HDA+HT was made into a single alloy layer of Al5Fe2 by diffusion treatment. In the microstructure of HDA+HT, void and crack defect were induced during the crystal phase transformation process. The SPE damage mechanism depends on material properties. Plastic deformation occurred in the substrate and HDA due to ductility, whereas weight loss due to brittleness occurred significantly in HDA+HT. As a result, the substrate and HDA showed better SPE resistance than HDA+HT.

Keywords

Acknowledgement

본 과제(결과물)는 교육부와 한국연구재단의 재원으로 지원을 받아 수행된 사회맞춤형 산학협력 선도대학(LINC+) 육성사업의 연구결과입니다.

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