INVESTIGATION OF THE EFFECT OF SHOT PEENING PROCESS ON THE CORROSION CHARACTERISTICS OF AA2024-T3 ALUMINIUM ALLOY
Keywords:
Aluminium, Corrosion, Glass Beads, PolarizationAbstract
The performance of components in many applications depends on the life of the materials. The durability of materials depends upon its strength. Many materials fail due to corrosion. Corrosion takes place in the materials extensively used in the field of marine, automobile and aerospace applications. Shot peening is one of the widely used surface treatment methods. An attempt is made to address the surface corrosion of Al 2024 T3 alloy by treating the material surface using shot penning process. Shot peening can affect the corrosion behaviour of aluminium, particularly if a ferrous medium is employed in the peening process. It is known that small additions of iron can significantly increase the corrosion rate of aluminium. This is generally attributed due to the transfer of iron between shot and work piece during the peening process. In this work the corrosion behaviour of Al alloy 2024-T3 was studied before shot peening and after shot peening condition. It is found that shot peening process using glass beads increased the surface corrosion resistance. Corrosion studies were carried out in a 3.5% NaCl solution using open circuit potential and potentiodynamic polarization technique. However, the potentiodynamic polarization study indicates there is an enhancement of corrosion potential (Ecorr) and a decrease of corrosion current density (Icorr).
Downloads
References
Jayaraman M, Siva Subramanian R, Balasubramanian V Kalainathan S S, Sathyajith S and Swaroop S (2012), “Effect of laser shot peening without coating on the surface properties and corrosion behaviour of 316L steel”, International Journal of Optics and Lasers in Engineering Vol. 50(12), 1740- 1745,.
Hashemi B, Rezaee Yazdi M and Azar V (2011), “The wear and corrosion resistance of shot peened nitrided 316L austenitic stainless steel”, Materials and Design, Vol.45(9), 3287-3292.
Renato Altobelli Antunes and Mara Cristina Lopes de Oliveira (2012), “Corrosion fatigue of biomedical metallic alloys: Mechanisms and mitigation”, Acta Biomaterialia Vol. 8(3), 937–962.
Suresh S (2004), “A text book on Fatigue of materials”, Cambridge University Press, 2nd edition.
Azevedo C R F (2003), “Failure analysis of a commercially pure titanium plate for osteosynthesis”, Engineering Failure Analalysis, vol.10(2), 153–164.
Magnissalis E A, Zinelis S and Karachalios T H (2003), “Failure analysis of two Ti-alloy total hip arthroplasty femoral stems fractured in vivo”, Journal of Biomedical Materials, Vol. 66B(1), 299–305.
Giordani E J, Guimarães V A, Pinto T B and Ferreira I (2004), “Effect of precipitates on the corrosion fatigue crack initiation of ISO 832–9 stainless steel biomaterial”, International Journal of Fatigue, Vol. 26(10), 1129-1136.
Gebert A (2010), “Effect of shot-peening on the corrosion resistance of a Zr-based bulk metallic glass”, Scripta Materialia, Vol. 62(9), 635-638.
Asquith D T and Yerokhin A L (2007), “The effect of combined shot-peening and PEO treatment on the corrosion performance of 2024 Al alloy”, Thin Solid Films, Vol. 516(2), 417-421.
Tiansheng Wang, Jinku Yu and Bingfeng Dong (2006), “Surface nanocrystallization induced by shot peening and its effect on corrosion resistance of 1Cr18Ni9Ti stainless steel”, Surface & Coatings Technology, Vol. 200(16), 4777- 4781.
Do Haeng Hur, Myung Sik Choi, Deok Hyun Lee and Jung Ho Han (2004), “Effect of shot peening on primary water stress corrosion cracking of Alloy 600 steam generator tubes in an operating PWR plant”, Nuclear Engineering and Design, Vol. 227(2), 155-160.
Azar V, Hashemi B and Mahboobeh Rezaee Yazdi (2010), “The effect of shot peening on fatigue and corrosion behavior of 316L stainless steel in Ringer's solution, Surface & Coatings Technology, Vol.204(21-22), 3546-3551.
Park J B and Lakes R S (1992), “Biomaterials: An Introduction”, Plenum Publishing.
Redmond J D, Miska K H (1982), “The basics of stainless steels”, Chemical Engineering, 79-93.
Peyre P, Scherpereel X, Berthe L, Carboni C, Fabbro R, Beranger G (2000), “Surface modifications induced in 316L steel by laser peening and shot-peening. Influence on pitting corrosion resistance”, Materials Science and Engineering, A Vol. 280(2), 294-301.
