Startseite Corrosion behavior of a precipitation hardened Ni–Cr–Co–Mo alloy under partial slagging coal gasification conditions
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Corrosion behavior of a precipitation hardened Ni–Cr–Co–Mo alloy under partial slagging coal gasification conditions

  • Sungkyu Lee , Joohyun Park , Sang Yeon Hwang , Seok-Woo Chung , Seung-Jong Lee , Yongseung Yun und Min Jung Kim
Veröffentlicht/Copyright: 28. Mai 2019
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Materials Testing
Aus der Zeitschrift Materials Testing Band 61 Heft 6

Abstract

A mechanistic exposure experiment was performed on the commercially available precipitation hardened VDM® alloy C–263 (Nicrofer® 5120 CoTi) Ni-Cr-Co-Mo alloy samples (21 wt.-% Cr, 21 wt.-% Co, 6.1 wt.-% Mo, 2.4 wt.-% Ti, 0.7 wt.-% Fe, 0.6 wt.-% Al, 0.6 wt.-% Mn, 0.4 wt.-% Si, 0.2 wt.-% Cu, 0.08 wt.-% C and bal. Ni) at coal gasification pilot plant facilities affiliated with the Institute for Advanced Engineering in Yongin, South Korea. Thermodynamic Ellingham–Pourbaix stability diagrams were constructed to provide insight into the mechanism of the observed corrosion behavior prevailing in the piping materials between the particulate removal unit and water scrubber of the coal gasification pilot plant. The thermodynamic inference on the corrosion mechanism was supplemented with the morphological, compositional and microstructural analyses of the exposed samples using scanning electron microscopy and energy-dispersive X-ray spectroscopy analyses performed on the external and cross–sectional surfaces of the recovered corrosion test samples to comprehensively examine the corrosion scale. Corrosion products with conspicuous spallation were observed after 139 h exposure to the corrosive environment (60 vol.-% CO, 28.4 vol.-%H2, 2.5 vol.-% CO2, 0.8 vol.-% CH4, 600 ppm H2S, and 110 ppm carbonyl sulfide under 2.005 MPa and 170 °C). Scanning electron microscopy and energy-dispersive X-ray spectroscopy positively identified formation of rather extensively peeled–off oxides as corrosion scales on the post–exposure alloy samples, which were attributed to the combined effects of evaporation of hydrated Fe, Al, and Cr chlorides and their subsequent transformation into thin (spalled) oxides. This article contains technical contents on the effects of Cr, Mo, Fe, and Al on the observed corrosion behavior which supplement and cast engineering insight into the previously published MP 2-2018 article on corrosion behavior of Ni-Cr-Mo-Fe alloy in a similar environment.

*Correspondence Address, Dr. Sungkyu Lee, Plant Engineering Division, Institute for Advanced Engineering, 175–28 Goan-ro 51beon-gil, Baegam–myeon, Cheoin–gu, Yongin-si, Gyeonggi–do, 17180, South Korea, E-mail:

Sungkyu Lee, born 1959, received his BSc from Hanyang University of Seoul, Korea, in 1982. He graduated with an MSc and PhD in Materials Science and Engineering from the University of Minnesota in Twin Cities, USA, in 1991 and 1994, respectively. Now, he is working as a principal engineer at the Plant Engineering Division, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, South Korea.

Joohyun Park, born 1975, received his BSc from Yonsei University, Seoul, Korea, in 1997. He graduated with an MSc and PhD degrees in Metallurgical Engineering from Yonsei University, Seoul, Korea, in 1999 and 2002, respectively. Now, he is working as Professor in the Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, South Korea.

Sang Yeon Hwang, born 1979, received his BSc and MSc in Environmental Engineering and Environmental Science from Jeonju University, Jeonju, Korea, in 2004 and 2006, respectively. Now, he is working as a senior researcher at the Plant Engineering Division, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea. Besides, he has completed all requirements for a Ph.D. degree at the Energy System Division, Ajou University, Suwon–si, Korea except for submission of dissertation.

Seok-Woo Chung, born 1968, received his BSc and MSc in Chemistry and Energy from Ajou University, Suwon, Korea, in 1993 and 1995, respectively. Now, he is working as head of the Plant Process Development Center, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea. He has also completed all requirements for a Ph.D. degree at the Department of Systems Engineering, Ajou University, Suwon–si, Korea except for submission of dissertation.

Seung-Jong Lee, born 1966, received his BSc and MSc in Chemistry and Organic Chemistry from Yonsei University, Seoul, Korea in 1988 and 1990, respectively. His PhD was conferred in Systems Engineering by Ajou University, Suwon, Korea, in 2002. Now, he is working as a principal engineer at the Plant Engineering Division, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea.

Yongseung Yun, born 1957, received his BSc in Chemical Engineering from Yonsei University, Seoul, Korea in 1979. His MSc and PhD degrees were conferred in the field of Chemical Engineering by Korea Advanced Institute of Science and Technology, Daejeon, Korea and the University of Utah, Salt Lake City, USA, in 1981 and 1990, respectively. He is currently working as Vice President in charge of Plant Engineering, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea.

Min Jung Kim, born 1983, received her BSc in Materials Science and Engineering from Incheon National University, Incheon, Korea in 2007. Her MSc and PhD degrees were conferred in Materials Science and Engineering by Hongik University, Seoul, Korea and Sungkyunkwan University, Suwon, Korea in 2009 and 2013, respectively. She is currently working as a research fellow at the Advanced Materials Technology Research Center, Sungkyunkwan University, Suwon-si, Gyeonggi-do, Korea.

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Published Online: 2019-05-28
Published in Print: 2019-06-01

© 2019, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Investigation of phase transformations in mill scales for the purification process
  5. Exposure response function for a quantitative prediction of weathering caused aging of polyethylene
  6. Mechanical properties characterization of resistance spot welded DP1000 steel under uniaxial tensile tests
  7. Corrosion failure analysis of a perforated F32 reactor
  8. Prediction of mechanical properties of Al6061 metal matrix composites reinforced with zircon sand and boron carbide
  9. Tribological behavior of a hydrostatically extruded ultra-fine grained Ti-13Nb-13Zr alloy
  10. Characterization of boronized AISI 1050 steel and optimization of process parameters
  11. Experimental investigation on mechanical properties of AA7075-AlN composites
  12. Modeling of machining parameters for MRR and TWR in EDM characteristics on Al/10 wt.-% TiB2 composites
  13. Artificial neural network approach to predict ion nitrided case depth and surface hardness of AISI 4340 steel
  14. Theoretical and experimental investigation of stress distribution in a crane hook
  15. Mechanical properties, degradation and flue gas analysis of basalt and glass fiber reinforced recycled polypropylene
  16. Corrosion behavior of a precipitation hardened Ni–Cr–Co–Mo alloy under partial slagging coal gasification conditions
  17. Effect of different loading systems on acousto-ultrasonic characteristics of concrete under axial compression
https://doi.org/10.3139/120.111359

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Investigation of phase transformations in mill scales for the purification process
  5. Exposure response function for a quantitative prediction of weathering caused aging of polyethylene
  6. Mechanical properties characterization of resistance spot welded DP1000 steel under uniaxial tensile tests
  7. Corrosion failure analysis of a perforated F32 reactor
  8. Prediction of mechanical properties of Al6061 metal matrix composites reinforced with zircon sand and boron carbide
  9. Tribological behavior of a hydrostatically extruded ultra-fine grained Ti-13Nb-13Zr alloy
  10. Characterization of boronized AISI 1050 steel and optimization of process parameters
  11. Experimental investigation on mechanical properties of AA7075-AlN composites
  12. Modeling of machining parameters for MRR and TWR in EDM characteristics on Al/10 wt.-% TiB2 composites
  13. Artificial neural network approach to predict ion nitrided case depth and surface hardness of AISI 4340 steel
  14. Theoretical and experimental investigation of stress distribution in a crane hook
  15. Mechanical properties, degradation and flue gas analysis of basalt and glass fiber reinforced recycled polypropylene
  16. Corrosion behavior of a precipitation hardened Ni–Cr–Co–Mo alloy under partial slagging coal gasification conditions
  17. Effect of different loading systems on acousto-ultrasonic characteristics of concrete under axial compression
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