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General and localized corrosion of magnesium alloys: A critical review

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Abstract

Magnesium (Mg) alloys as well as experimental alloys are emerging as light structural materials for current, new, and innovative applications. This paper describes the influence of the alloying elements and the different casting processes on the microstructure and performance of these alloys and corrosion. It gives a comprehensible approach for the resistance of these alloys to general, localized and metallurgically influenced corrosion, which are the main challenges for their use. Exposure to humid air with ∼65% relative humidity during 4 days gives 100–150 nm thickness. The film is amorphous and has an oxidation rate less than 0.01 µm/y. The pH values between 8.5 and 11.5 correspond to a relatively protective oxide or hydroxide film; however above 11.5 a passive stable layer is observed. The poor corrosion resistance of many Mg alloys can be due to the internal galvanic corrosion caused by second phases or impurities. Agitation or any other means of destroying or preventing the formation of a protective film leads to increasing corrosion kinetics. The pH changes during pitting corrosion can come from two different reduction reactions: reduction of dissolved oxygen (O) and that of hydrogen (H) ions. Filiform corrosion was observed in the uncoated AZ31, while general corrosion mainly occurred in some deposition coated alloys. Crevice corrosion can probably be initiated due to the hydrolysis reaction. Exfoliation can be considered as a type of intergranular attack, and this is observed in unalloyed Mg above a critical chloride concentration.

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References

  1. Anon., Technical communication, Dow Chemical Company, Dow North America, Freeport, TX, 1994, 77541.

  2. W.K. Miller and E.F. Ryntz, Jr.: “Magnesium for Automotive Applications. A State-of-the-Art Assessment, Localized Corrosion,” Society of Automotive Engineers, Warrendale, PA, 1984, p. 2.524–2.542.

    Google Scholar 

  3. E. Aghion, B. Bronfin, F. Von Buch, S. Schumann, and H. Friedrich: “Dead Sea Magnesium Alloys Newly Developed for High Temperature Applications” in Magnesium Technology 2003, H.I. Kaplan, ed., The Minerals, Metals & Materials Society, Warrandale, PA, 2003, pp. 177–82.

    Google Scholar 

  4. A. Luo, M. Balogh, and B.R. Powell: “Tensile Creep and Microstructure of Magnesium-Aluminum-Calcium Based Alloys for Powertrain Applications: Part 2 of 2,” SAE Paper No. 2001-02-0423, SAE, Warrendale, PA, 2001.

    Google Scholar 

  5. G.L. Dunlop, W.P. Sequeira, M.S. Dargusch, G. Song, A. Atrens, T. Kittel, D. St. John, A.K. Dahle, and M. Murray: “Microstructure and Properties of Magnesium DIE Casting” in Proceedings of the 1998 Annual World Magnesium, A Global Vision for Magnesium, 55th meeting of the International Magnesium Association, ed., May 1998, Coronado, CA, International Magnesium Association, McLean, VA, 1998, pp. 68–73.

    Google Scholar 

  6. M. Pekguleryuz and E. Baril: “Development of Creep Resistant Mg-Al-Sr Alloys” in Magnesium Technology 2001, J. Hryn, ed., The Minerals, Metals & Materials Society, Warrendale, PA, 2001, pp. 119–25.

    Google Scholar 

  7. M. Pekguleryuz, P. Labelle, D. Argo, and E. Baril: “Magnesium Alloy AJ62X with Superior Creep Resistance, Ductility and Die Castability” in Magnesium Technology 2003, H.I. Kaplan, ed., The Minerals, Metals & Materials Society, Warrendale, PA, 2003, pp. 201–206.

    Google Scholar 

  8. K. Pettersen, H. Westengen, J.I. Skar, M. Videm, L-Y. Wei: “Creep Resistant Mg Alloy Development” in Magnesium Alloys and Their Applications, K.U. Kainer, ed., WILEY-VCH Verlag GmbH, Germany, 2000, pp. 29–34.

    Chapter  Google Scholar 

  9. B.R. Powell, A.A. Luo, V. Rezhets, J.J. Bommarito, and B.L. Tiwari: “Development of Creep-Resistant Magnesium Alloys for Powertrain Applications: Part 1 of 2,” SAE Technical Paper 2001-01-0422, SAE, Detroit, MI, 2001.

    Google Scholar 

  10. P. Lyon, J.F. King, and K. Nuttal: “A New Magnesium HPDC Alloy for Elevated Temperature Use” in Proceedings of the Third International Magnesium Conference, G. W. Lorimer, ed., The Institute of Materials, Manchester, UK, 1996, pp. 99–108.

    Google Scholar 

  11. J. Mason and R.T.W. Clyne, in A.R. Bunsell, P. Lamicq and A. Massiah (ed.), Proc. 3rd European Conference on Composite Materials (ECCM3), France, 20–23 March 1989, Elsevier, Amsterdam, 1989, p. 213.

    Google Scholar 

  12. C. Jaschik (Sp), H. Haferkamp, and M. Niemeyer: “New Magnesium Wrought Alloys” in Magnesium Alloys and Their Applications, K.U. Kainer, ed., WILEY-VCH Verlag, Germany, 2000, pp. 41–46.

    Chapter  Google Scholar 

  13. A. Sanschagrin, R. Tremblay, R. Angers, and D. Dubé: “Mechanical Properties and Microstructure of New Magnesium-Lithium Base Alloys,” J Mater Sci Eng, 1996, A220, pp. 69–77.

    Article  CAS  Google Scholar 

  14. I.J. Polmear: “Magnesium Alloys and Their Application,” Mater. Sci. Technol., 1994, 10(1), pp. 1–6.

    CAS  Google Scholar 

  15. R.L. Edgar: “Global Overview on Demand and Applications for Magnesium Alloys, International Congress” in Magnesium Alloys and Their Applications, K.U. Kainer, ed., WILEY-VCH, Weinheim, Germany, 2000, pp. 3–8.

    Google Scholar 

  16. P. Bakke, K. Pettersen, and H. Westengen: “Enhanced Ductility and Strength Through RE Addition to Magnesium Die Casting Alloys” in Magnesium Technology 2003, H.I. Kaplan, ed., The Minerals, Metals & Materials Society, Warrendale, PA, 2003, pp. 171–76.

    Google Scholar 

  17. D.M. Walukas, R.F. Decker, R.E. Vining, and R.D. Carnahan: “Thixomolding® of Magnesium” in Magnesium 97 Proceedings of the First Israeli International Conference on Magnesium Science & Technology, E. Aghion and D. Eliezer, ed., Magnesium Research Institute Ltd., Beer-Sheva, Israel, 1977, pp. 54–59.

    Google Scholar 

  18. R. Beals, S. LeBeau, O. Roberto and P. Shashkov: “Advances in Thixomolding Magnesium Alloys Part II, 2003,” in Magnesium Technology 2003, H.I. Kaplan, ed., TMS (The Minerals, Metals & Materials Society), The Minerals, Metals & Materials Society, Warrendale, PA, pp. 283–88.

  19. H. Kaufmann and P.J. Uggowitzer: “The Fundamentals of the New Rheocasting Process for Magnesium Alloys,” in Magnesium Alloys and their Applications Proceedings, K.U. Kainer, ed., Wiley-VCH, Weinheim, Germany, 2000, pp. 533–39.

    Google Scholar 

  20. W. Fragner, C. Peterlechner, and R. Potzinger: “Scale-up of Magnesium New Rheocasting from a Laboratory Level to an Industrial Process” in Magnesium Technology 2003, H.I. Kaplan, ed., The Minerals, Metals & Materials Society, Warrendale, PA, 2003, pp. 277–82.

    Google Scholar 

  21. H. Kaufmann, R. Potzinger, and P.J. Uggowitzer: “NRC — Magnesium Castings for Structural Applications” in Met. Soc., Light Metals 2001 Métaux Légers, COM 2001, M. Sahoo and T.J. Lewis, ed., Canadian Institute of Mining, Metallurgy and Petroleum, Quebec, Canada, pp. 216–23.

  22. M. Pourbaix, Atlas of Electrochemical Equilibria in Aqueous Solutions, NACE International and CEBEL COR (Centre Belge d’Étude de la Corrosion), Houston, TX, 1974, p. 141.

    Google Scholar 

  23. G. G. Perrault: “Magnesium,” in Encyclopedia of Electrochemistry of the Elements, A.J. Bard, ed., Vol. VIII, Marcel Dekker, NY, 1978, Chap. VIII-4, pp. 262–318.

    Google Scholar 

  24. A.F. Froats, T.Kr. Aune, D. Hawke, W. Unsworth, and J. Hillis: “Corrosion of Magnesium and Magnesium Alloys,” in Metals Handbook, 9th ed., Corrosion ASM International, Materials Park, OH, 1987, Vol. 13, pp. 740–54.

    Google Scholar 

  25. D.L. Hawke, J.E. Hillis, M. Pekguleryuz, and I. Nakatsugawa: “Corrosion Behavior,” in Magnesium and Magnesium Alloys, M.M. Avedesian and H. Baker, ed., ASM International, Materials Park, OH, 1999, pp. 194–210.

    Google Scholar 

  26. N.S. McIntyre and C. Chen: “Role of Impurities on Mg Surfaces Under Ambient Exposure Conditions,” Corrosion Science, 1998, 40 (10), pp. 1697–1709.

    Article  CAS  Google Scholar 

  27. J.H. Nordlien, S. Ono, N. Masuko, and K. Nisancioglu: “Morphology and Structure of Oxide Films Formed on Magnesium by Exposure to Air and Water, J. Electrochemical Soc., 1995, 142(10), pp. 3320–22.

    Article  CAS  Google Scholar 

  28. E. Ghali: “Magnesium and Magnesium alloys” in Uhlig’s Corrosion Handbook, R.W. Revie, ed., John Wiley, New York, 2000, Ch. 44, pp. 793–830.

    Google Scholar 

  29. G.L. Song and A. Atrens: “Corrosion Mechanisms of Magnesium Alloys,” Adv. Eng. Mater., 1999, 1(1), pp. 11–33.

    Article  CAS  Google Scholar 

  30. G.L. Song, A. Atrens, and M. Dargusch: “Influence of Microstructure on the Corrosion of Diecast AZ 910,” Corros., Sci., 1999, 41, pp. 249–73.

    Article  CAS  Google Scholar 

  31. J.H. Nordlien, K. Nisancioglu, S. Ono, and N. Masuko: “Morphology and Structure of Oxide Films Formed on MgAl Alloys by Exposure to Air and Water,” J. Electrochem. Soc., 1996, 143(8), pp. 2654–72.

    Article  Google Scholar 

  32. W.A. Ferrando: “Review of Corrosion and Corrosion Control of Magnesium Alloys and Composites,” J. Mater. Eng., 1989, 11(4), pp. 299–313.

    CAS  Google Scholar 

  33. J.E. Hillis: “Magnesium” in Corrosion Testing and Standards: Application and Interpretation, ASTM Manual Series: MNL 20, R. Baboian, ed., ASTM, Philadelphia, PA, 1995, Ch. 45, pp. 438–46.

    Google Scholar 

  34. S. Mathieu, C. Rapin, J. Hazan, and P. Steinmetz: “Corrosion Behavior of High Pressure Die-Cast and Semi-Solid Cast AZ91D Alloys,” Corrosion Science, 2002, 44, pp. 2737–56.

    Article  CAS  Google Scholar 

  35. G.L. Makar and J. Kruger: “Corrosion Studies of Rapidly Solidified Magnesium Alloys,” J. Electrochem. Soc., 1990, 137, pp. 414–21.

    Article  CAS  Google Scholar 

  36. C.H. Baloun: “Corrosion Testing in Water,” in Corrosion, ASM, Metals Handbook, 9th ed., ASM International, Materials Park, OH, 1987, Vol. 13, pp. 207–208.

    Google Scholar 

  37. B-Y. Hur, and K-W. Kim: “A New Method for Evaluation of Pitting Corrosion Resistance of Magnesium Alloys,” Corrosion Rev, 1998, 16(1–2), pp. 85–94.

    CAS  Google Scholar 

  38. J.D. Hanawalt, C.E. Nelson, and J.A. Peloubet: “Corrosion Studies of Magnesium and Its Alloys,” Trans. Am. Soc. Mining Metall. Eng., 1942, 147, pp. 273–99.

    Google Scholar 

  39. J.L. Robinson, and P.F. King: J. Electrochem. Soc., 1961, 108, pp. 36–41.

    Article  CAS  Google Scholar 

  40. G. Baril, and N. Pebere: “The Corrosion Behavior of Pure Magnesium in Aerated and De-Aerated Sodium Sulfate Solution,” Corrosion Science, 2001, 43, pp. 471–84.

    Article  CAS  Google Scholar 

  41. F. Czerwinski: “The Oxidation of Magnesium Alloys in Solid and Semisolid States” in Magnesium Technology 2003, H.I. Kaplan, ed., The Minerals, Metals & Materials Society, Warrendale, PA, 2003, pp. 39–42.

    Google Scholar 

  42. O. Lunder, K. Nisancioglu, and R.S. Hansen: “Corrosion of Die Cast Magnesium-Aluminum Alloy,” Congress and Exposition, Paper No. 930755, SAE, Detroit, MI, Society of Automotive Engineering, Inc., Warrendale, PA, pp. 117–126.

  43. V. Mitrovic-Scepanovic and R.J. Brigham: “Localized Corrosion Initiation on Magnesium Alloys,” Corrosion, 1992, 48(9), pp.780–84.

    CAS  Google Scholar 

  44. S.J. Splinger and N.H. McIntyre: “The Initial Interaction of Water Vapour with Mg-Al Alloy Surfaces at Room Temperature,” Surf. Sci., 1994, 314, pp. 157–71.

    Article  Google Scholar 

  45. T. Beldjoudi, C. Fiaud, and L. Robbiola: “Influence of Homogenization and Artificial Aging Heat Treatments on Corrosion Behavior of Mg-Al Alloys,” Corrosion, 1993, 49, pp. 738–45.

    Article  CAS  Google Scholar 

  46. M.J. Danielson and R.H. Jones: “The Interaction Between Microstructure and Corrosion Initiation in Certain Die Cast and Thixomolded® Magnesium Alloys” in Magnesium Technology 2001, J. Hryn, ed., The Minerals, Metals & Materials Society, Warrendale, PA, 2001, pp. 263–68.

    Google Scholar 

  47. P.Y. Li, H. J. Yu, S.C. Chen, and Y.M. Yu: “Factors Affecting the Corrosion Resistance of Cast Magnesium Alloys” in Magnesium Technology 2003, H.I. Kaplan, ed. The Minerals, Metals & Materials Society, Warrendale, PA, 2003, pp. 51–58.

    Google Scholar 

  48. B.R. Powell, A.A. Luo, B.L. Tiwari, and V. Rezhets: “The Die Castability of Calcium-Containing Magnesium Alloys: Thin-Wall Computer Case” in Magnesium Technology 2002, H.I. Kaplan, ed., The Minerals, Metals & Materials Society, Warrendale, PA, 2002, pp. 123–29.

    Google Scholar 

  49. B.L. Tiwari and J.J. Bommarito: “A Novel Technique to Evaluate the Corrosion Behavior of Magnesium Alloys” in Magnesium Technology 2002, H.I. Kaplan, ed., The Minerals, Metals & Materials Society, Warrendale, PA, 2002, pp. 269–75.

    Google Scholar 

  50. C. Chen, S.J. Splinter, T. Do, and N.S. McIntyre: “Measurement of Oxide Film Growth on Mg and Al Surfaces Over Extended Periods Using XPS,” Surf. Sci., 1997, 382, p. L652-L657.

    Article  CAS  Google Scholar 

  51. P.L. Bonora, M. Andrei, A. Eliezer, E.M. Gutman: “Corrosion Behavior of Stressed Magnesium Alloys,” Corrosion Sci., 2002, 44, pp. 729–49.

    Article  CAS  Google Scholar 

  52. O. Lunder, T.Kr. Aune, and K. Nisancioglu: “Effect of Mn Additions on the Corrosion Behavior of Mould-Cast Magnesium ASTM AZ91,” Corrosion, 1987, 43, pp. 291–95.

    CAS  Google Scholar 

  53. D. Daloz, P. Steinmetz, and G. Michot: “Corrosion Behavior of Solidified Magnesium-Aluminum-Zinc Alloys,” Corrosion, 1993, 53(12), pp. 944–54.

    Google Scholar 

  54. I. Nakatsugawa, H. Takayasu, and K. Saito: “Corrosion Behavior of Thin Wall Magnesium Products Molded by Thixomolding, Magnesium Alloys and Their Applications” in Magnesium Alloys and Their Applications, K.U. Kainer, ed., WILEY-VCH Verlag, Weinheim, Germany, 2000, pp. 445–50.

    Chapter  Google Scholar 

  55. I. Nakatsugawa, F. Yamada, H. Takaysu, T. Tsukeda, and K. Saito: “Corrosion Behavior of Thixomolded Mg-Al Alloys” in Proceedings 38th Annual Conference METSOC, CIM, Environmental Degradation of Materials and Corrosion Control in Metals, M. Elboujdaini and E. Ghali, ed, Canadian Institute of Mining, Metallurgy and Petroleum, Quebec, Canada, 1999, pp. 113–23.

    Google Scholar 

  56. H.B. Yao, Y. Li, A.T.S. Wee, J.S. Pan, and J.W. Chai: Surf. Rev. Lett., 2001, 8(5), p. 575.

    CAS  Google Scholar 

  57. S. Krishnamurthy, M. Khobaib, E. Robetson, and F.H. Froes: “Corrosion Behavior of Rapidly Solidified Mg-Nd and Mg-Y Alloys,” Mater. Sci. Eng., 1988, 99, pp. 507–11.

    Article  CAS  Google Scholar 

  58. E.A. Shaw, R.M. Ormerod, and R.M. Lambert: “Oxidation of Neodymium Overlays and Nd/Cu Alloy Films on Cu(111): Observation of Chemisorbed Oxygen on Top of Ndx/Cu(111),” Surf. Sci. 1992, 275, pp. 157–69.

    Article  CAS  Google Scholar 

  59. H.B. Yao, Y. Li, A.T.S. Wee, J.W. Chai, and J.S. Pan: “Correlation Between Corrosion Behavior and Corrosion Films Formed on the Surfaces of Mg82-xNi18Ndx (x = 0, 5, 15) Amorphous Alloys,” Appl. Surf. Sci, 2001, 173, pp. 54–61.

    Article  CAS  Google Scholar 

  60. H.B. Yao, Y. Li, A.T.S. Wee, J.W. Chai, and J.S. Pan: “The Alloying Effect of Ni on the Corrosion Behavior of Melt-spun Mg-Ni Ribbons,” Electrochim. Acta, 2001, 46, p. 2649–57.

    Article  CAS  Google Scholar 

  61. C.H. Kam, Y. Ki, S.C. Ng, A.T.S. Wee, J.S. Pan, and H. Jones: “The Effect of Heat Treatment on the Corrosion Behavior of Amorphous Mg-Ni-Nd Alloys,” J. Mater. Res. 1999, 14(4), pp. 1638–44.

    Article  CAS  Google Scholar 

  62. A. Gebert, U. Wolff, A. John, J. Eckert, and L. Schultz: “Stability of the Bulk Glass-Forming Mg65Y10Cu25 Alloy in Aqueous Electrolytes Materials,” Mater. Sci. Eng. 2001, A299, pp. 125–35.

    CAS  Google Scholar 

  63. C.B. Baliga and P. Tsakpoulos: “Development of Corrosion-Resistant Magnesium Alloys 1. Characterization of Splat Quenched Mg-10Al and Mg-16Al,” Mater. Sci. Technol., 1993, 9, pp. 507–11.

    CAS  Google Scholar 

  64. G.L. Song, and A. Atrens: “Corrosion Behavior of Skin Layer and Interior of Die Cast AZ91D” in Magnesium Alloys and Their Applications, Proc. Fourth Intl. Conf. on Magnesium Alloys and Their Applications, Wolfsburg, Germany, B.L. Mordike and K.U. Kainer ed., Werkstoff-Informationsgesellschat, Frankfurt, Germany, 1998, pp. 415–19.

    Google Scholar 

  65. K. Lübbert, J. Kopp, and E. Wendler-Kalsh: “Corrosion Behavior of Laser Beam Welded Aluminum and Magnesium Alloys in the Automotive Industry,” Mater. Corrosion, 1999, 50, pp. 65–72.

    Article  Google Scholar 

  66. O. Lunder, J.E. Lein, S.M. Hesjevik, T.K. Aune, and K. Nisancioglu: “Corrosion Morphologies on Magnesium Alloy AZ91,” Werkstoffe und Korrosion 1994, 45, pp. 331–40.

    Article  CAS  Google Scholar 

  67. A. Yamamoto, A. Watanabe, K. Sugahara, S. Fukumoto, and H. Tsubakino: “Applying a Vapor Deposition Technique to Improve Corrosion Resistance in Magnesium Alloys” in Proceedings of the Second International Conference on Environment Sensitive Cracking and Corrosion Damage, M. Matsumura, H. Nagano, K. Nakasa, and Y. Isomoto, ed., Nishiki Printing Ltd, ESCCD 2001, Hiroshima, Japan, 2001, pp. 160–67.

    Google Scholar 

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  1. Department of Mining, Metallurgical and Materials Engineering, Laval University Quebec, G1K 7P4, Canada

    Edward Ghali

  2. GKSS-Forschungszentrum GmbH, Institute for Materials Research, Center for Magnesium Technology, Geesthacht, Germany

    Wolfgang Dietzel & Karl-Ulrich Kainer

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Ghali, E., Dietzel, W. & Kainer, KU. General and localized corrosion of magnesium alloys: A critical review. J. of Materi Eng and Perform 13, 7–23 (2004). https://doi.org/10.1361/10599490417533

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