International Journal of Advanced Materials Research
Articles Information
International Journal of Advanced Materials Research, Vol.1, No.2, May 2015, Pub. Date: May 18, 2015
Corrosion Studies of Al7075 / Silicon Carbide Composites in Mixture of Sodium Hydroxide and Sodium Chloride Solutions
Pages: 41-44 Views: 1291 Downloads: 1000
[01] Pruthviraj R. D., R&D Centre, Department of Engineering Chemistry, RajaRajeswari College of Engineering, Visvesvaraya Technological University, Bangalore, Karnataka, India.
The aim of the research work was to investigate the corrosion behaviour of Silicon Carbide(SiC) reinforced aluminium 7075 metal matrix composites (MMCs) in a mixture of alkaline and salt solution using weight loss method. The mixture alkali and salt solution used is mixture of sodium hydroxide and sodium chloride solutions. The composites are manufactured by liquid metallurgy technique using vortex method. Aluminium 7075 / SiC MMCs containing 2, 4 and 6 weight percentage of SiC particulates are casted. The corrosion characteristics of Aluminium 7075 /SiC composite and the unreinforced alloy were experimentally assessed. The corrosion test was carried out at different concentrations of mixture of sodium hydroxide and sodium chloride solution at a concentration of 0.025M, 0.05M and 0.1 M solutions for different exposure time. The results indicated that corrosion rate of metal matrix composites was lower than that of matrix material Al 7075 under the corrosive atmosphere irrespective of exposure time and concentration of corrodent. Aluminium 7075 / SiC composite become more corrosion resistant as the SiC content is increased. This is because of the formation of stable oxide layer over the specimens. Scanning Electron Microscopy (SEM) show the degree of attack of alkaline solution on the surface of the investigated material.
Metal Matrix Composite (MMCs), Silicon Carbide, Corrosion Loss, Weight Loss
[01] H.E. Deve, C. McCullough, Continuous-fiber reinforced Al composites: A new generation, JOM 47 (1995) 33-37.
[02] V.V. Vikulin, I.Y. Kelina, A.S. Shatalin, L.N. Rusanova, Advanced ceramic structural materials, Refract. Ind.Ceram. 45 (2004) 383-386.
[03] R. Asthana, M. Singh, N. Sobczak, The role of wetting and reactivity in infiltration of ceramic-metal composites, Ceram. Eng. Sci. Proc. 26 (2005) 249-261.
[04] A. Vassel, Continuous fibre reinforced titanium and aluminium composites: A comparison, Mater. Sci. Eng. A 263 (1999) 305-313.
[05] T.P.D. Rajan, R.M. Pillai, B.C. Pai, Reinforcement coatings and interfaces in aluminium metal matrix composites, J. Mater. Sci. 33 (1998) 3491-3503.
[06] J. Rodel, H. Prielipp, M. Knechtel, N. Claussen, Better ceramics through metal modification, Trans. Mater. Res. Soc. Jpn. 19B (1994) 763-776.
[07] S. EzhilVannan and Paul Vizhian Simson, Corrosion Behaviour of Short Basalt Fiber Reinforced with Al7075 Metal Matrix Composites in Sodium Chloride Alkaline Medium, J. Chem. Eng. Chem. Res.1(2), (2014), 122-131
[08] J.M.G.DeSalazar, A.Urefia, S.Mazanedo and M.Barrens, Corrosion behaviour of AA6061 and AA7075 reinforced with Al2O3 particulates in aerated 3.5%chloride solution potentiodynamic measurements and microstructure evaluation, Corrosion Science, 41, (1999), 529-545.
[09] J.E.Castle, L.Sun and H.Yan,The use of scanning auger microscopy to locate cathodic centers in SiC/Al6061 MMC And to determine the current density at which they operate, Corrosion Science, 36(6), (1994), 1093-1110
[10] Krupakara, P. V, Corrosion Characterization of Al6061/Red Mud Metal Matrix Composites, PortugaliaeElectrochimicaActa 31(3), (2013),157-164
[11] Wu.Jianxin, Liu Wei LiPeng Xing &Wurenjie, “Effect of matrix alloying elements on the corrosion resistance of C /Al composites materials, Jr. of Mat.Sci. lett. 12, (1993).1500-1501
[12] J.F.Mclyntyre, R.K.Conrad&S.L.GoHedge, "Technical note: The effect of heat treatment on the pitting behaviour of SiC / AA2124", Corrosion, vol 46, 190-192.
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