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Investigation of protective surface film behavior of fluorine containing cover gas parameters on molten magnesium alloy

Year 2020, Volume: 26 Issue: 1, 51 - 53, 20.02.2020

Abstract

Protection of molten magnesium is one of the most important issues for existing and potential magnesium users. An effective melt protection system is necessary for safety reasons as well as minimizing expensive metal losses. Since SF6 has an extremely high global warming potential, HFC-134a is an effective solution in many applications. In this study, surface films formed on molten AZ91A alloy under HFC-134a/N2 atmosphere are examined in various parameters such as molten metal temperatures, exposure times, concentrations and flow rates of the protective gases. The obtained surface films as a result of the experiments were analyzed by optical microscope. The Taguchi experimental design method was used to determine the optimum process parameters. Process parameters provide the best protective layer on the melt; exposure time of 60 min, molten magnesium temperature of 660 °C, concentration of 0.30% vol., and the flow rate of protective gas mixture of 600 l/h. were determined.

References

  • Mathis K, Zdražilova Z, Farkas G, Trojanova Z, Lukač P, Vidrich G. “Effect of temperature on mechanical properties of continuously cast AZ31 magnesium alloy”. Kovove Mater., 50, 139-143, 2012.
  • Liu JR, Chen HK, Zhao L, Huang WD. “Oxidation behavior of molten magnesium and AZ91D magnesium alloy in 1,1,1,2-tetrafluoroethane/air Atmospheres”. Corrosion Science, 51, 129-134, 2009.
  • Zhao L, Liu JR, Chen HK, Huang WD. “The Characterization of Surface Films Formed on Molten Magnesium and AZ91D Alloy in air/1,1,1,2-tetrafluoroethane Atmospheres”. Journal of Alloys and Compounds, 480, 711-716, 2009.
  • Chen H, Liu J, Huang W. “The protective surface film formed on molten ZK60 magnesium alloy in 1,1,1,2-tetrafluoroethane/air atmospheres”. Corrosion Science, 52, 3639-3645, 2010.
  • Ha W, Kim Y. “Effects of cover gases on melt protection of Mg alloys”. Journal of Alloys and Compounds, 422, 208-213, 2006.
  • Mirak A, Davidson CJ, Taylor JA. “Characterization of fresh surface oxidation films formed on pure molten magnesium in different atmospheres”. Corrosion Science, 52, 1992-2000, 2010.
  • Wang X., Xiong S. “Protection behavior of SO2-containing cover gases to molten magnesium alloy”. Transactions of Nonferrous Metals Society of China, 21(4), 807-813, 2011.
  • Xiong S, Wang X. “Protection behavior of fluorine-containing cover gases on molten magnesium alloys”. Transactions of Nonferrous Metals Society of China, 20(7), 807-813, 2010.

Florin içerikli koruyucu gaz parametrelerinin ergiyik magnezyum alaşımlarının yüzey filmi üzerine etkilerinin incelenmesi

Year 2020, Volume: 26 Issue: 1, 51 - 53, 20.02.2020

Abstract

Ergimiş magnezyumun korunması, mevcut ve potansiyel magnezyum kullanıcıları için en önemli konulardan biridir. Pahalı metal kayıplarının en az seviyeye indirilmesinin yanı sıra güvenlik gibi nedenlerinden de ötürü, etkili bir ergiyik koruma sistemi gereklidir. SF6, son derece yüksek bir küresel ısınma potansiyeline sahip olduğundan, HFC-134a birçok uygulamada etkili bir çözümdür. Bu çalışmada, HFC-134a/N2 atmosferi altında ergimiş AZ91A alaşımında oluşan yüzey filmleri, farklı ergimiş metal sıcaklıkları, temas süreleri, konsantrasyonları ve koruyucu gaz debileri gibi çeşitli parametrelerde incelenmektedir. Optimum işlem parametrelerinin belirlenmesi için Taguchi deneysel tasarım yöntemi kullanılmıştır. Deneyler neticesinde elde edilen yüzey filmleri optik mikroskop ile analiz edilmiştir. Proses parametrelerinin ergiyik üzerinde en iyi koruyucu tabaka sağlayanları; 60 dakikalık temas süresi, 660 °C ergimiş magnezyum sıcaklığı, % 0.30 hacimsel gaz konsantrasyon ve 600 l/h'lik koruyucu gaz karışım debisi olarak belirlenmiştir.

References

  • Mathis K, Zdražilova Z, Farkas G, Trojanova Z, Lukač P, Vidrich G. “Effect of temperature on mechanical properties of continuously cast AZ31 magnesium alloy”. Kovove Mater., 50, 139-143, 2012.
  • Liu JR, Chen HK, Zhao L, Huang WD. “Oxidation behavior of molten magnesium and AZ91D magnesium alloy in 1,1,1,2-tetrafluoroethane/air Atmospheres”. Corrosion Science, 51, 129-134, 2009.
  • Zhao L, Liu JR, Chen HK, Huang WD. “The Characterization of Surface Films Formed on Molten Magnesium and AZ91D Alloy in air/1,1,1,2-tetrafluoroethane Atmospheres”. Journal of Alloys and Compounds, 480, 711-716, 2009.
  • Chen H, Liu J, Huang W. “The protective surface film formed on molten ZK60 magnesium alloy in 1,1,1,2-tetrafluoroethane/air atmospheres”. Corrosion Science, 52, 3639-3645, 2010.
  • Ha W, Kim Y. “Effects of cover gases on melt protection of Mg alloys”. Journal of Alloys and Compounds, 422, 208-213, 2006.
  • Mirak A, Davidson CJ, Taylor JA. “Characterization of fresh surface oxidation films formed on pure molten magnesium in different atmospheres”. Corrosion Science, 52, 1992-2000, 2010.
  • Wang X., Xiong S. “Protection behavior of SO2-containing cover gases to molten magnesium alloy”. Transactions of Nonferrous Metals Society of China, 21(4), 807-813, 2011.
  • Xiong S, Wang X. “Protection behavior of fluorine-containing cover gases on molten magnesium alloys”. Transactions of Nonferrous Metals Society of China, 20(7), 807-813, 2010.
There are 8 citations in total.

Details

Primary Language English
Subjects Engineering
Journal Section Research Article
Authors

Ali Serdar Vanlı This is me

Anıl Akdoğan This is me

Meltem Eryıldız This is me

Publication Date February 20, 2020
Published in Issue Year 2020 Volume: 26 Issue: 1

Cite

APA Vanlı, A. S., Akdoğan, A., & Eryıldız, M. (2020). Investigation of protective surface film behavior of fluorine containing cover gas parameters on molten magnesium alloy. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, 26(1), 51-53.
AMA Vanlı AS, Akdoğan A, Eryıldız M. Investigation of protective surface film behavior of fluorine containing cover gas parameters on molten magnesium alloy. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi. February 2020;26(1):51-53.
Chicago Vanlı, Ali Serdar, Anıl Akdoğan, and Meltem Eryıldız. “Investigation of Protective Surface Film Behavior of Fluorine Containing Cover Gas Parameters on Molten Magnesium Alloy”. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi 26, no. 1 (February 2020): 51-53.
EndNote Vanlı AS, Akdoğan A, Eryıldız M (February 1, 2020) Investigation of protective surface film behavior of fluorine containing cover gas parameters on molten magnesium alloy. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi 26 1 51–53.
IEEE A. S. Vanlı, A. Akdoğan, and M. Eryıldız, “Investigation of protective surface film behavior of fluorine containing cover gas parameters on molten magnesium alloy”, Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, vol. 26, no. 1, pp. 51–53, 2020.
ISNAD Vanlı, Ali Serdar et al. “Investigation of Protective Surface Film Behavior of Fluorine Containing Cover Gas Parameters on Molten Magnesium Alloy”. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi 26/1 (February 2020), 51-53.
JAMA Vanlı AS, Akdoğan A, Eryıldız M. Investigation of protective surface film behavior of fluorine containing cover gas parameters on molten magnesium alloy. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi. 2020;26:51–53.
MLA Vanlı, Ali Serdar et al. “Investigation of Protective Surface Film Behavior of Fluorine Containing Cover Gas Parameters on Molten Magnesium Alloy”. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, vol. 26, no. 1, 2020, pp. 51-53.
Vancouver Vanlı AS, Akdoğan A, Eryıldız M. Investigation of protective surface film behavior of fluorine containing cover gas parameters on molten magnesium alloy. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi. 2020;26(1):51-3.

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