Evaluation of the Pitting Corrosion Behavior of Al-nano Zro2 composite Produced by Accumulative Roll Bonding (ARB) Process
Subject Areas :
1 - دانشگاه شیراز
2 - دانشگاه شیراز
Keywords: Nano Composite, Accumulative Roll Bonding (ARB), Cyclic Polarization Test,
Abstract :
In this study, the pitting corrosion behaviour of Al-Nano ZrO2 Nano composites fabricated by Accumulative Roll bonding (ARB) process was investigated. Strips of 1050-aluminum alloy of length 250 mm, width of 40 mm, and thickness of 1 mm annealed at 623K in ambient atmosphere and analytical grade of ZrO2 powder with an average size of 40nm were used as raw materials. The Al-Nano ZrO2 composite was produced in 5 cycles. For electrochemical measurements, the square specimens of 10mm×10mm×1mm were cut, connected to copper wires and cold mounted. The open circuit potentials (OCP) of the specimens were measured after 24h immersion in the artificial seawater (3.5wt% NaCl), then Cyclic Polarization test were carried out at range of -0.25 / 1 v with respect to OCP and scan rate of 1mV/s. The results of Cyclic Polarization test indicated that when rolling cycles increase, the Eb and Eb-Erp decrease. The repassivation improved by decrease in Eb-Erp. SEM images represent the decrease and uniform distribution of pits on the surface of samples by increasing the rolling cycles.
[1] J. W. Kaczmar, K. Pietrzak & W. Wlosinski, “The production and application of metal matrix composite materials”, J. Mater. Process. Technol, Vol. 106, pp.58-67, 2000.
[2] Y. Saito, N. Tsuji, H. Utsunomiya, T. Sakai & R. G. Hong, “ultra-fine grained bulk aluminium produced by accumulative roll bonding process”, ScriptaMaterialia, Vol. 39, pp. 1221-1227, 1998.
[3] Y. Saito, H. Utsunomiya, N. Tsuji & T. Sakai, “Novel ultra-high straining process for bulk materials development of the accumulative roll bonding (ARB) process”, Acta Mater, Vol. 4, No. 2, pp. 579-583, 1999.
[4] R. Song, D. Ponge, D. Raabe, J. G. Speer & D. K. Matlock, “Overview of processing,Overview of processing, microstructure and mechanical properties of ultrafine grainedbccsteels”, Materials Science and Engineering, Vol. 441A, pp. 1-17, 2006.
[5] M. R. Rezaei, M. R. Toroghinejad & F. Ashrafizadeh, “Effects of ARB and ageing processeson mechanical properties and microstructure of 6061 aluminum alloy”, Journal of MaterialsProcessing Technology, Vol. 211, pp. 1148-1190, 2011.
[6] R. Jamaati, S. Amirkhanlou, M. R. Toroghinejad & B. Niroumand, “Significant improvement of semi-solid microstructure and mechanical properties of A356 alloy byARB process”, Materials Science and Engineering, Vol. 528A, pp. 2495-2501, 2011.
[7] B. L. Li, N. Tsuji & N. Kamikawa, “Microstructure homogeneity in various metallicmaterials heavily deformed by accumulative roll-bonding”, Materials Science andEngineering, Vol. 423A, pp. 331-342, 2006.
[8] B. Beausir, J. Scharnweber, J. Jaschinskib, H. G. Brokmer, C. G. Oertel & W. Skrotzki, “Plastic anisotropy of ultrafine grained aluminium alloys produced by accumulative rollbonding”, Materials Science and Engineering, Vol. 527A, pp. 3271-3278, 2010.
[9] Ch. Kwan, Zh. Wang & S. B. Kang, “Mechanical behavior and microstructural evolutionupon annealing of the accumulative roll-bonding (ARB) processed Al alloy 1100”, Materials Science and Engineering, Vol. 480A, pp. 148-159, 2008.
[10] H. Pirgazi, A. Akbarzadeh, R. Petrov, J. Sidor & L. Kestens, “Texture evolution of AA3003 aluminum alloy sheet produced by accumulative roll bonding”, Materials Science andEngineering, Vol. 492A, pp. 110-117, 2008.
[11] N. Tsuji, Y. Ito, Y. Saito & Y. Minamino, “Strength and ductility of ultrafine grainedaluminum and iron produced by ARB and annealing”, ScriptaMaterialia, Vol. 47, pp. 893-899, 2002.
[12] B. L. Li, N. Tsuji & N. Kamikawa, “Microstructure homogeneity in various metallicmaterials heavily deformed by accumulative roll-bonding”, Materials Science andEngineering, Vol. 423A, pp. 331-342, 2006.
[13] S. Dan, M. Ai-bin, J. Jing-hua, L. Pin-hua & Y. Dong-hui, “Corrosion behavior of ultra finegrained industrial pure Al fabricated by ECAP”, Transactions of Nonferrous MetalsSociety of China, Vol. 19, pp. 1065-1070, 2009.
[14] M. K. Chung, Y. S. Choi, J. G. Kima, Y. M. Kimb & J. C Lee, “Effect of the number of ECAPpass time on the electrochemical properties of 1050 Al alloys”, Materials Science and Engineering, Vol. 366A, pp. 282-291, 2004.
[15] M. FadaeiNaeini, M. H. Shariat & M. Eizadjou, “On the chloride-induced pitting of ultrafine grains 5052 aluminum alloy produced by accumulative roll bonding process”, Journal of Alloys and Compounds, Vol. 509, pp. 4696-4700, 2011.
[16] W. Wei, K. X. Wei & Q. B. Du, “Corrosion and tensile behaviors of ultra-fine grained Al-Mn alloy produced by accumulative roll bonding”, Materials Science and Engineering, Vol. 454-455A, pp. 536-541, 2007.
[17] E. McCafferty, “Sequence of steps in the pitting of aluminum by chloride ions”, Corrosion Science, Vol. 45, pp. 1421-1438, 2003.
[18] E. Darmiani, I. Danaee, M. A. Golozar & M. R. Toroghinejad, “Corrosion investigation of Al-sic nano-composite fabricated by accumulative roll bonding (ARB) process”, Journal of Alloy and Compounds, Vol. 552, pp. 31-39, 2013.
[19] Woo-Jin. Lee & Su-Il. Pyun, “Effects of sulphateionadditives on the pitting corrosion of pure aluminum in 0.01 M NaCl solution”, Electrochimica Acta, Vol. 45, pp. 1901-1910, 2000.
[20] Annual book of ASTM standard, “standard practice for preparing”, cleaning and evaluation corrosion test specimens. Vol. 03. 02, 2002.
[21] Ch. W. Schmidt, C. Knieke, V. Maier, H. Werner Hoppel, W. Peukret & M. Goken, “Accelerated grain refinement during accumulative roll bonding by nano particle reinforcement”, Scripta Materialia, Vol. 64, pp. 245-248, 2011.