Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Corrosion Characteristics of Aluminum Die Casting Alloys with Different Scrap Charge Rate

스크랩 장입 비율에 따른 다이캐스팅용 알루미늄 합금의 부식 특성

  • Kim, Jun-Ho (Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University) ;
  • Lee, Seung-Hyo (Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University)
  • 김준호 (한국해양대학교 해양신소재융합공학과) ;
  • 이승효 (한국해양대학교 해양신소재융합공학과)
  • Received : 2020.12.24
  • Accepted : 2020.12.29
  • Published : 2020.12.31
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Abstract

The utilization of aluminum scrap is a subject of great importance in terms of reducing energy consumption and environmental protection. However, aluminum scrap contains impurities, which can degrade the properties of aluminum alloy, especially corrosion resistance. This study examines the effect of scrap charge rate of aluminum alloys about microstructures and corrosion characteristics. According to the metallographic examinations, Mg2Si tended to become coarser and its uniformity was decreased by increasing aluminum scrap charge rate. The immersion test exhibited corrosion progressed through the eutectic areas due to micro-galvanic interactions. Electrochemical measurements revealed that excess aluminum scrap could reduce the intergranular corrosion resistance of aluminum alloys. Results showed that the scrap charge rate is important factor in the design of corrosion resistance of aluminum die casting alloys.

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References

  1. 국회예산정책처, 지속성장을 위한 기후변화 대응전략, 단행본, (2020) 5-22.
  2. 에너지경제연구원, 세계 에너지시장 인사이트, 제19-23호, (2019) 3-14.
  3. Vargel, C., Corrosion of aluminium, Elsevier, (2020).
  4. 모세준, 자동차 경량소재 개발 동향 및 완성차업체 대응, 자동차경제 459, (2013) 41-53.
  5. Frankel, G. S., Pitting Corrosion of Metals: A Review of the Critical Factors, J. Electrochem. Soc. 145, (1998) 2186-2198. https://doi.org/10.1149/1.1838615
  6. 조재익, 김철우, Al-Mg계 다이캐스팅 합금의 미세조직 및 기계적 성질에 미치는 Mg 및 Si 의 영향, 한국주조공학회지 32.5, (2012), 219-224 https://doi.org/10.7777/jkfs.2012.32.5.219
  7. Wagiman, A., Mustapa, M. S., Asmawi, R., Shamsudin, S., Lajis, M. A., & Mutoh, Y., A review on direct hot extrusion technique in recycling of aluminium chips, Int J Adv Manuf Technol 106, (2020) 641-653. https://doi.org/10.1007/s00170-019-04629-7
  8. Soo, V. K., Peeters, J., Paraskevas, D., Compston, P., Doolan, M., & Duflou, J. R., Sustainable aluminium recycling of end-of-life products: A joining techniques perspective. Journal of Cleaner Production 178, (2018) 119-132. https://doi.org/10.1016/j.jclepro.2017.12.235
  9. Liang, W. J., Rometsch, P. A., Cao, L. F., & Birbilis, N., General aspects related to the corrosion of 6xxx series aluminium alloys: Exploring the influence of Mg/Si ratio and Cu, Corrosion science 76, (2013) 119-128. https://doi.org/10.1016/j.corsci.2013.06.035
  10. Ahlatci, H., Production and corrosion behaviours of the Al-12Si-XMg alloys containing in situ Mg2Si particles, Journal of Alloys and Compounds 503(1), (2010) 122-126. https://doi.org/10.1016/j.jallcom.2010.04.214
  11. Jones, D. A., Principles and prevention of corrosion, Macmillan, (1992).
  12. Arrabal, R., Mingo, B., Pardo, A., Mohedano, M., Matykina, E., & Rodriguez, I., Pitting corrosion of rheocast A356 aluminium alloy in 3.5 wt.% NaCl solution, Corrosion Science 73, (2013) 342-355. https://doi.org/10.1016/j.corsci.2013.04.023
  13. Choi, I. K., Cho, S. H., Kim, S. J., Jo, Y. S., & Kim, S. H., Improved corrosion resistance of 5xxx aluminum alloy by homogenization heat treatment, Coatings 8(1) 39, (2018) 1-9. https://doi.org/10.3390/coatings8010039
  14. Xuehong, X., Deng, Y., Shuiqing, C., & Xiaobin, G., Effect of interrupted ageing treatment on the mechanical properties and intergranular corrosion behavior of Al-Mg-Si alloys, Journal of Materials Research and Technology, 9(1), (2020) 230-241. https://doi.org/10.1016/j.jmrt.2019.10.050
  15. Escalera-Lozan, R., Pech-Canul, M. I., Pech-Canul, M. A., Montoya-Davila, M., & Uribe-Salas, A., The role of Mg2Si in the corrosion behavior of Al-Si-Mg alloys for pressureless infiltration, The Open Corrosion Journal, 3(1), (2010) 73-79. https://doi.org/10.2174/1876503301003010073