A COMPARATIVE STUDY TO EVALUATE THE CORROSION PERFORMANCE OF FRICTION STIR WELDED AZ31B MAGNESIUM ALLOY UNDER IMMERSION, SALT FOG, PITTING AND GALVANIC CORROSION TESTS UNDER NACL ENVIRONMENT
DOI:
https://doi.org/10.37255/jme.v4i1pp010-025Keywords:
AZ31B magnesium alloys, Friction stir welding, Corrosion tests, Scanning electron microscopy and X-ray DiffractionAbstract
An investigation was carried out to quantify and characterize the corrosion behaviour of AZ31B magnesium alloy joints. Extruded Mg alloy plates of 6 mm thick of AZ31B grade were butt welded using a solid state, environmentally cleaner welding process, friction stir welding process. The weld specimens were underwent immersion, salt spray, pitting and galvanic corrosion tests in order to quantify and characterize the corrosion rates of the welds with the influence of different pH values, chloride ion concentration and the corrosion time. The corrosion rates, microstructure, scanning electron microscopy and X-ray diffraction analysis concludes the optimum parameter for the usage of the magnesium alloy welds for the best service applications. Keywords: Keywords: EDM, Alumina and Genetic Algorithm
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References
Modike B.L and Ebert T (2001) “Magnesium – Properties, Applications, Potential”, Mater. Sci. and Engg. A, Vol. 302 37-45.
Zeng R.C, Dietzel W, Zettler R, Chen J and Kainer K.U (2008),” Trans. of Non-Ferr.”, Met. Soc. of China, Vol.18, 76-80.
Zeng R.C, Zhang J, Huang W.J, Dietzel W, Kainer K.U, Blawert C, and Ke W (2006), “Trans. of Non-Ferr.”, Met. Soc. of China Vol.16,763-771.
Nagasawa T, Otsuka M, Yokota T and Ueki T (2000), “Structure and Mechanical Properties of Friction stir Weld Joints of Magnesium alloy AZ31; in: H.I Kaplan, J. Hryn, B. Clow [Eds.] Magnesium Technology 2000”, TMS, Warrendale 383-387.
Weifeng X, Liu J, Zhu H (2011), “Pitting corrosion of friction stir welded aluminium alloy thick plate in alkaline chloride solution”, Trans. of Non-Ferr. Met. Soc. of China Vol.21, 188-193
Zhao M and Wu S (2006), “A Chromium free conversion coating of magnesium alloy by a phosphate permanganate solution”, Surf. Coat and Tech. Vol.200, 5407-5412.
Altun H and Sadrisen (2004), “Studies on the influence of chloride ion concentration and pH on the corrosion of AZ63 magnesium alloy”, Mater. And Des. Vol.25, 637-641.
Song Y, Shan D, Chen R and Han E (2010), “Effect of second phases on the corrosion behavior of wrought Mg-Zn-Y Zr alloy”, Corr. Sci. Vol.52, 1830-1837.
Dhanapal A, Rajendra Boopathy S and Balasubramanian V (2011), “Developing an empirical relationship to predict the corrosion rate of friction stir welded AZ31B magnesium alloy under salt fog environment”, Mater. And Des., Vol.32, 5066-5072.
Box G.E.P and Draper N.R (1987), “Empirical Model Building and Response Surface”, John Wiley and Sons, New York.
ASM International, Metals Handbook, Corrosion, ninth ed., ASM International, 1987.
Jones D.A (1992), “Principles and Prevention of Corrosion”, Prentice-Hall, Englewood Cliffs, NJ.
Fontana M.G and Greene N.D (1984), “Corrosion Engineering”, McGraw-Hill, New York.
Uhlig H.H (1973), “Corrosion and Corrosion Control”, Wiley, New York.
Song G, Atrens A, St. John D and Hryn J.N (2001), “Magnesium Technology 2001 Symposium”, Minerals, Metals & Materials Society, New Orleans, LA, 255–262.
Zhao M.C, Liu M, Song G and Atrens A (2008), “Influence of the beta-phase morphology on the corrosion of the Mg alloy AZ91”, Corr. Sci. Vol.50, 1939–1953
Zhao M.C, Liu M and Song G (2008), “Influence of microstructure on corrosion of as-cast ZE41”, Adv. Engg. Mater. Vol. 10, 104–111.
Zhao M.C, Schmutz P, Brunner S, Liu M, Song G and Atrens A (2009), “An exploratory study of the corrosion of Mg alloys during interrupted salt spray testing”, Corr. Sci. Vol.51, 1277–1292.
Kok-Hui Goh, Teik-Thye Lim and Peng Chui (2008), “Evaluation of the effect of dosage, pH and contact time on highdose phosphate inhibition for copper corrosion control using response surface methodology (RSM)”, Corr. Sci. Vol.50, 918-927.
Aslan N (2008), “Application of response surface methodology and central composite rotatable design for modeling and optimization of a multi gravity separator for chromite concentration”, Powd. Tech, Vol.185,80-86.
Bruce D Craig (1995), “Handbook of Corrosion Data”, ASM International
Uhlig H (1948), “The Corrosion Handbook”, J. Wiley Publication, New York.
Babion R (2005), “Corrosion tests and standards: Application and Interpretation”, ASTM international.
Peng L, Chang J, Guo X, Atrens A, Ding W and Peng Y, “Influence of heat treatment and microstructure on the corrosion of magnesium alloy Mg–10Gd–3Y–0.4Zr”, J. of Appl. Electrochem., doi:10.1007/s10800-008-9739-4.
Song G and Atrens A(1999), “Corrosion mechanisms of magnesium alloys”, Adv. Engg. Mater. Vol.1, 11–33.
Zeng R.C, Chen J, Dietzel, Zettler R., Santos J.F, Nascimento L and Kainer K. U (2009), “Corrosion of friction stir welded magnesium alloy AM50”, Corrosion Science, Vol.51, 1738-1746.
Rose R, Manisekar K. and Balasubramanian V (2011), “Effect of axial force on microstructure and tensile properties of friction stir welded AZ31B magnesium alloy”, Transactions of Nonferrous Metals Society of China, Vol. 16, 974-984.
Holly J Martin, Horstemeyer M.F, Paul T Wang (2011), “Quantification of corrosion mechanisms under immersion and salt-spray environments on an extruded AZ31 magnesium alloy”, Corr. Sci. Vol.53, 1348-1361.
Song G (2005), “Recent Progress in Corrosion and Protection of Magnesium Alloys”, Adv. Engg. Mater. Vol.7, 563.
Hara N, Kobayashi Y, Kagaya D and Akao N (2007), “Formation and breakdown of surface films on magnesium and its alloys in aqueous solutions”, Corr. Sci. Vol.49, 166-175.
Zhi-min Z, Xu H and Cheng L (2010), “Corrosion properties of plastically deformed AZ80 magnesium alloy”, Tran. of Non-ferr. Met. Soc. China, Vol. 20, 697-702.
Wang L, Zhang B and Shinohara T (2010), “Corrosion Behaviour of AZ91Magnesium alloy in dilute