Effects of Erosion Angle on Erosion Properties of Fe-B Alloy in Flowing Liquid Zinc
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LIQUID metals, such as liquid Na, Li, Bi, Pb, and Zn, are widely used in industry.[1–6] These liquid metals are usually flowing in working conditions, and they can significantly erode machine parts.[7–10] Erosion results in huge economic losses and serious safety hazards. Liquid zinc is mainly used in the hot-dip galvanizing industry. Hot-dip galvanizing is a low-cost and effective method for preventing corrosion of materials such as steel, stainless steel, and cast iron. Rapid development of manufacturing technology for hot-dip galvanizing requires the immersed equipment (e.g., rolls, bearings, stabilizers, and heaters) to have good corrosion resistance in liquid zinc. Several materials have been investigated and used in the continuous galvanizing line.[11] Because Fe2B and FeB possess excellent corrosion resistances and exhibit non-wetting with liquid zinc, boronized steels and Fe-B alloys demonstrate good corrosion resistance in static liquid zinc.[12–18] However, the erosion resistance of Fe-B alloys in flowing liquid zinc is seldom reported. The parameters that significantly influence erosion in single and multiphase flow are erosion angle and erosion
GUANGZHU LIU, YONG WANG, and YIRAN WANG, PhD Candidates, JIANDONG XING, Professor, SHENGQIANG MA, PhD Lecturer, YUAN GAO, Master Candidate, are with the State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an, Shaanxi 710049, P.R. China. Contact e-mail: [email protected] YALING HE, Professor, is with the MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, P.R. China. HANGUANG FU, Professor, is with the Research Institute of Advanced Materials Processing Technology, School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, P.R. China. Manuscript submitted September 5, 2014. METALLURGICAL AND MATERIALS TRANSACTIONS A
velocity.[19–21] Erosion testing showed that erosion rate increases with increasing erosion velocity, but different results were observed when the erosion angle was varied, as seen in previous studies on erosion.[19–21] Many researchers have investigated the effects of erosion angle on erosion by multiphase flow. Results indicate that the maximum erosion rate occurs at low erosion angles in ductile material, and at high erosion angles in brittle materials.[22–24] Hattori et al. examined the effect of erosion angle on liquid droplet impingement erosion, and the experimental results suggest that changing the water film thickness by varying of erosion angle has an important influence on erosion rate.[25] Investigations that focused on the effect of erosion angle on erosion behavior in various single-phase erosive liquids were carried out by Wang et al.[20] and Xu et al.[26] They suggest that with increasing impact angle, the sample surface under a high velocity flow field decreases, while it increases under a low velocity flow fie
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