Abstract
The degradation of materials generally occurs via corrosion, fatigue, and wear. Once a magnesium (Mg) alloy is chosen for a certain application, corrosion testing is generally required as a function of the expected service environment, the type of corrosion expected in service, and the type of surface protection, depending on the material and its use in the intended surface. In the absence of appropriate standards for the testing of magnesium alloys, a brief summary of the various procedures of accelerated electrochemical and corrosion testing of Mg alloys that have been adopted by different schools is given, accompanied by some critical comments for future work. Hydroxide, hydroxide-chloride, and corrosive water formulated according to American Society for Testing Materials (ASTM) standard 1384-96 are considered to evaluate general corrosion, localized corrosion, and corrosion influenced by metallurgical parameters. The influence of agitation, oxygenation, pH, and temperature are discussed. Surface cleaning, superficial microstructure, and surface preparation for testing are discussed. Appropriate electrochemical methods that can be applied to this relatively new and electrochemically active structural material are described. Corrosion potential measurements, polarization, impedance, noise electrochemistry, and surface reference electrode technique are recommended as valuable methods for evaluating the resistance of existing or experimental alloys to these types of corrosion. Corrosion kinetics and varying properties of the solution at the alloy/solution interface are examined. A critical description of the relevance and importance of these methods to corrosion testing of Mg alloys is given.
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References
Corrosion, Vol 13, 9th ed., Metals Handbook, ASM International, 1987, p 193–196, 207–220, 231–233, 303–310
B.W. Lifka, Aluminum (and Alloys), Corrosion Testing and Standards: Application and Interpretation, R. Baboian, Ed., American Society for Testing and Materials, 1995, p 447–457
NACE: Metals Section, Corrosion Data Survey, 6th ed., NACE International, The Corrosion Society, 1985
Handbook of Corrosion Data, B.D. Craig and D.S. Anderson, Ed., ASM International, 1995
D.J. De Renzo, Corrosion Resistant Materials Handbook, 4th ed., D.J. De Renzo, Ed., Noyes Data Corporation, 1985
P.A. Schweitzer, Corrosion Resistance Tables: Metals, Plastics, Nonmetallic and Rubbers, 2nd ed., Marcel Dekker, 1986
G.L. Song, A. Atrens, and M. Dargusch, Influence of Microstructure on the Corrosion of Diecast AZ91D, Corrosion Sci. Vol 41, 1999, p 249–273
GI 6–95 Standard Recommended Practice for Applying Statistics to Analysis of Corrosion Data, Annual Book of ASTM Standards, Vol 03-02, p 69–82
W.K. Miller and E.F. Ryntz Jr., “Magnesium for Automotive Applications: A State-of-the-Art Assessment, Localized Corrosion,” paper 83-0521, Society of Automotive Engineers, 1984
A. Stalmann, W. Sebastian, H. Friedrich, S. Schumann, and K. Droder, Properties and Processing of Magnesium Wrought Products for Automotive Applications, Adv. Eng. Mater., Vol 3 (No. 12), 2001, p 969–976
E. Aghion and B. Bronfin, Global Overview on Demand and Applications for Magnesium Alloys, Magnesium Alloys Development Towards the 21st Century, Mater. Sci. Forum, Vol 350–351, 2000, p 19–28
E. Aghion, B. Bronfin, F. Von Buch, S. Schumann, and H. Friedrich, Dead Sea Magnesium Alloys Newly Developed for High Temperature Applications, Magnesium Technology, H.I. Kaplan, Ed., The Minerals, Metals & Materials Society, 2003, p 177–182
R.L. Edgar, Global Overview on Demand and Applications for Magnesium Alloys, International Congress Magnesium Alloys and Their Applications, K.U. Kainer, Ed., 26–28 Sept 2000 (Munich), Wiley-VCH, 2000, p 3–8
A. Luo, M. Balogh, and B.R. Powell, “Tensile Creep and Microstructure of Magnesium-Aluminium-Calcium Based Alloys for Powertrain Applications: Part 2 of 2,” paper 01-0423, Society of Automotive Engineers, 2001
H. Kaufman, R. Potzinger, and P.J. Uggowitzer, NRC, Magnesium Castings for Structural Applications, M. Sahoo and T.J. Lewis, Ed., Metallurgical Society of CIM (Montreal, Canada), Light Metals Métaux Légers, COM, 2001, p 216–223
I. Nakatsugawa, H. Takayasu, and K. Saito, Corrosion Behavior of Thin Wall Magnesium Products Molded by Thixomolding, op. cit. ref. 13, p 445–450
D.M. Walukas, R.F. Decker, R.E. Vining, and R.D. Carnahan, Thixomolding of Magnesium, Magnesium 97 Proceedings of the First Israeli International Conference on Magnesium Science & Technology, E. Aghion and D. Eliezer, Ed., 10–12 Nov 1997 (Dead Sea), p 54–59
C. Jaschik, H. Haferkamp, and M. Niemeyer, New Magnesium Wrought Alloys, op. cit. ref. 13, p 41–46
W. Sebastian, K. Dröder, and S. Schumann. Properties and Processing of Magnesium Wrought Products for Automotive Applications, op. cit. ref. 13, p 602–608
G.L. Song and A. Atrens, Corrosion Mechanisms of Magnesium Alloys, Adv. Eng. Mater., Vol 1 (No. 1), 1999, p 11–33
R.J. Brigham, “Localized Corrosion Initiation on Magnesium Alloys,” Report No. MTL 90-51 (TR), CANMET, 1990
M.M. Avedesian and H. Baker, Ed., ASM Specialty Handbook: Magnesium and Magnesium Alloys, ASM International, 1999, p 138–162, 194–215
J.D. Hanawalt, C.E. Nelson, and J.A. Peloubet, Corrosion Studies of Magnesium and Its Alloys, Trans. Am. Soc. Mining Metall. Eng., Vol 147, 1942, p 273–299
G. Song, A. Atrens, D. St. John, J. Nairn, and Y. Li, The Electrochemical Corrosion of Pure Magnesium in 1 N NaCl, Corrosion Sci., Vol 39 (No. 5), 1997, p 855–875
G. Song, A. Atrens, D. St John, X. Wu, and J. Nairn, The Anodic Dissolution of Magnesium in Chloride and Sulfate Solutions, Corrosion Sci., Vol 39 (No. 10–11), 1997, p 1981–2004
G. Song and A. Atrens, Corrosion Behaviour of Skin Layer and Interior of Die Cast AZ91D, Proceedings, Fourth International Conference on Magnesium Alloys and Their Applications, B.L. Mordike and K.U. Kainer, Ed., 28–30 April 1998 (Wolfsburg, Germany), Wekstoff-Informationsgesellschaft GmbH, 1998, p 415–419
P.P. Trzaskoma, Corrosion Behavior of a Graphite Fiber/Magnesium Metal Matrix Composite in Aqueous Chloride Solution, Corrosion, Vol 42 (No. 10), 1986, p 609–613
E.M. Gutman, A. Eliezer, Ya. Unigovski, and E. Abramov, Mechanelectrochemical Behavior and Creep Corrosion of Magnesium Alloys, Mater. Sci. Eng., Vol 302, 2001, p 63–67
P.L. Bonora, M. Andrei, A. Eliezer, and E.M. Gutman, Corrosion Behaviour of Stressed Magnesium Alloys, Corrosion Sci., Vol 44, 2002, p 729–749
H. Inoue, K. Sugahara, A. Yamamoto, and H. Tsubakino, Corrosion Rate of Magnesium and Its Alloys in Buffered Chloride Solutions, Corrosion Sci., Vol 44, 2002, p 603–610
S. Mathieu, C. Rapin, J. Hazan, and P. Steinmetz, Corrosion Behavior of High Pressure Die-Cast and Semi-Solid Cast AZ91D Alloys, Corrosion Sci., Vol 44, 2002, p 2737–2756
P. Adeva-Ramos, S.B. Dodd, P. Morgan, F. Hehmann, P. Steinmetz, and F. Sommer, Autopassive Wrought Magnesium Alloys, Adv. Eng. Mater., Vol 3 (No. 3), 2001, p 147–152
R. Feser and J.W. Erning, Electrochemical Noise Measurements for the Determination of the Effectiveness of New Corrosion Protection Layers on Aluminum and Magnesium, Mater. Corrosion, Vol 52, 2001, p 456–461
E.D. Morales, E. Ghali, N. Hort, W. Dietzel, and K.U. Kainer, Corrosion Behavior of Magnesium Alloys with RE Additions in Sodium Chloride Solutions, Magnesium Alloys 2003 Part 1, Proceedings of the 2nd International Conference on Platform Science and Technology for Advanced Magnesium Alloys, Y. Koshima, T. Aizawa, K. Higashi, and S. Kamado, Ed., 26–30 Jan 2003 (Osaka, Japan), Trans Tech Publications Ltd, 2003, p 867–872
O. Lunder, T.K. Aune, and K. Nisancioglu, Effect of Mn Additions on the Corrosion Behavior of Mould-Cast Magnesium ASTM AZ91, Corrosion, Vol 43, 1987, p 291–295
T. Beldjoudi, C. Fiaud, and L. Robbiola, Influence of Homogenization and Artificial Aging Heat Treatments on Corrosion Behavior of Mg-Al Alloys, Corrosion, Vol 49, 1993, p 738–745
G. Baril and N. Pebere, The Corrosion Behavior of Pure Magnesium in Aerated and Deaerated Sodium Sulfate Solution, Corrosion Sci., Vol 43, 2001, p 471–484
G. Song, A. Atrens, and D. St. John, An Hydrogen Evolution Method for the Estimation of the Corrosion Rate of Magnesium Alloys, Magnesium Technology, J. Hryn, Ed., The Minerals, Metals & Materials Society, 2001, p 255–262
B.L. Tiwari and J.J. Bommarito, A Novel Technique to Evaluate the Corrosion Behavior of Magnesium Alloys, Magnesium Technology, H.I. Kaplan, Ed., The Minerals, Metals & Materials Society, 2002, p 269–275
A.F. Froats, T.K. Aune, D. Hawke, W. Unsworth, and J. Hillis, Corrosion, Vol 13, 9th ed., Metals Handbook, ASM International, 1987, p 740–754
J.I. Skar and D. Albright, Corrosion Behavior of Die-Cast Magnesium in ASTM B117 Salt Spray and GM9540P Cyclic Corrosion Test, op. cit. ref. 12, p 59–63
D. Weiss, B. Bronfin, G. Golub, and E. Aghion, Corrosion Resistance Evaluation of Magnesium and Magnesium Alloys by an Ion Selective Electrode, Magnesium 97, Proceedings of the First Israeli International Conference on Magnesium Science & Technology, E. Aghion and D. Eliezer, Ed., 10–12 Nov 1997 (Dead Sea), 1997, p 208–213
Y.-S. Choi, J.-G. Kim, S.K. Kim, and Y.-J. Kim, Aqueous Corrosion Characteristics of Mg-4Ni-xAl Alloys in Acid-Chloride Solution, op. cit. ref. 39, p 277–282
P. Roberge, Acceleration and Amplification of Corrosion Damage, Handbook of Corrosion Engineering, McGraw Hill, 1999, p 486–576
O. Lunder, J.E. Lein, S.M. Hesjevik, T.K. Aune, and K. Nisancioglu, Corrosion Morphologies on Magnesium Alloy AZ91, Werkstoffe Korrosion, Vol 45, 1994, p 331–340
L. Ciaghi, L. Fedrizzi, F. Deflorian, and P.L. Bonora, Evaluation of the Corrosion Rate of Mg/Al Zn Alloys, International Congress Magnesium Alloys and Their Applications (Garmich, Germany), Wiley-VCH, 1992, p 151–158
C.F. Baker, New Alloys and Shot Delivery System Developments, Magnesium Alloys and Their Applications, B.L. Mordike and F. Hehman, Ed., Informations Gesellschaft, 1992, p 77–87
V. Mitrovic-Scepanovic and R.J. Brigham, Localized Corrosion Initiation on Magnesium Alloys, Corrosion, Vol 48 (No. 9), 1992, p 780–784
“Standard Method for Pitting of Crevice of Metallic Surgical Implant Materials,” F 746-87, 1997 Annual Book of ASTM Standards, ASTM, Vol 13.01, p 181–186
B.-Y. Hur and K.-W. Kim, A New Method for Evaluation of Pitting Corrosion Resistance for Magnesium Alloys, Corrosion Rev., Vol 16, 1998, p 85–94
I. Nakatsugawa, F. Yamada, H. Takaysu, T. Tsukeda, and K. Saito, Corrosion Behavior of Thixomolded Mg-Al Alloys, Proceedings of the 38th Annual Conference METSOC, CIM, Environmental Degradation of Materials and Corrosion Control in Metals, M. Elboujdaini and E. Ghali, Ed., 22–26 Aug 1999 (Quebec), p 113–123
M.O. Oteyaka, A.-M. Lafront, R. Tremblay, and E. Ghali, Pitting Corrosion of Some Magnesium Alloys by Scanning Reference Electrode Techniques (SRET), NACE International Seminar Proceedings, Northern Area, Montreal Section, Session 2, 26–27 Aug 2002 (Montreal)
A.-M. Lafront, M.O. Oteyaka, R.D. Klassen, P.R. Roberge, and E. Ghali, Study of the Corrosion of Zinc and Aluminum Magnesium Alloys by Electrochemical Noise (EN) and Scanning Reference Electrode Technique (SRET), ibid.
R.M. Kain, Crevice Corrosion Behavior of Stainless Steel in Sea Water and Related Environments, Corrosion, Vol 40 (No. 6), 1984, p 313–321
B.A. Boukamp, A Non Linear Least-Squares Fit Procedure for Analysis of Immittance Data of Electrochemical Systems, Solid State Ionics, Vol 20 (No. 1), 1986, p 31–44
R. Udhayan and D.P. Prokash Bhatt, J. Power Sources, Vol 63, 1996, p 103–107
S. Turgoose and R.A. Cottis, The Impedance Response of Film-Covered Metals, Electrochemical Impedance: Analysis and Interpretation, Scully, Silverman and Kendig, Ed., 1993, p 173–191
N. Pebere, C. Riera, and F. Dabosi, Investigation of Magnesium Corrosion in Aerated Sodium Sulfate Solution by Electrochemical Impedance Spectroscopy, Electrochem. Acta, Vol 35 (No. 2), 1990, p 555–561
C.H. Tsai, Analysis of EIS Data for Common Corrosion Processes, op. cit. ref. 57, p 37–52
R.G. Kelly, Pitting, Corrosion Testing and Standards: Application and Interpretation, R. Baboian, Ed., ASTM, 1995, p 166–174
J.Q. Zhang, Z. Zhang, J.M. Wang, H.B. Shao, and C.N. Cao, Corrosion Monitoring of LY12 in 1 N Sodium Chloride Solution with Electrochemical Noise Technique, Acta Metall. Sinica, Vol 14 (No. 2), 2001, p 91–96
K.R. Trethewey, D.A. Sargent, D.J. Marsh, and S. Haines, New Methods of Quantitative Analysis of Localized Corrosion Using Scanning Electrochemical Probes, Modelling Aqueous Corrosion From Individual Pits to System Management, NATO ASI Series, Series E: Applied Sciences, Vol 266, K.R. Trethewey and P.R. Roberge, Ed., 1994, p 417–442
L.F. Jaffe and R. Nuticelli, An Ultrasensitive Vibrating Probe for Measuring Steady Extracellular Currents, J. Cell Biol., Vol 63, 1974, p 614–628
H.S. Isaacs and M.W. Kendig, Determination of Surface Inhomogeneities Using a Scan Probe Impedance Technique, Corrosion, Vol 36, 1980, p 269–274
D.A. Eden, Electrochemical Noise, Uhlig’s Corrosion Handbook, W.R. Revie, Ed., John Wiley, 2000, Chap. 69, p 1227–1238
N. Morihiro, M. Takeda, G. Katayama, M. Kido, and Y. Harada, Corrosion Behaviour of WC Thermal Spray Materials, Proceedings of the Second International Conference on Environment Sensitive Cracking and Corrosion Damage, “ESCCD,” M. Matsumura, H. Nagano, K. Nakasa, and Y. Isomoto, Ed., 29 Oct–2 Nov 2001 (Hiroshima, Japan), Nishiki Printing Ltd, 2001, p 153–159
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Ghali, E., Dietzel, W. & Kainer, KU. Testing of general and localized corrosion of magnesium alloys: A critical review. J. of Materi Eng and Perform 13, 517–529 (2004). https://doi.org/10.1361/10599490420665
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DOI: https://doi.org/10.1361/10599490420665