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Manjunatha, K. G.
- Evaluation of Corrosion Studies of as Casted Aluminum 6065 Metal Matrix Composite by Weight Loss Method
Authors
1 Department of Chemistry, City Engineering College, Bangalore, Karnataka, IN
2 Department of Chemistry, Ghousia College of Engineering, Ramanagaram, Karnataka, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 11Sp (2016), Pagination: 19-22Abstract
Aluminum matrix composites (AMCs) are a range of advanced engineering materials that can be used for a wide range of applications within the aerospace, automotive, biotechnology, electronic and sporting goods industries. AMCs consist of a non-metallic reinforcement (SiC, Graphite etc.) incorporated into Aluminum matrix which provides advantageous properties over base metal (Al) alloys. These include improved abrasion resistance, creep resistance, dimensional stability, exceptionally good stiffness-to-weight and strength-to-weight ratios and better high temperature performance. Present paper involves the study of corrosion properties of aluminum metal matrix composites and unreinforced alloy. AMCs is prepared using Silicon Carbide and Graphite. Al 6065 series alloy is used to prepare composite with varied percentage of SiC (0, 2, 4%) and hybrid composite with equal amount of SiC and Graphite is prepared by liquid metallurgy technique using vortex method. The corrosion studies were carried out by weight loss method by immersing the specimen for 24 hrs., in various corrosion medium such as acid chloride, acid sulphate and neutral mediums. Results indicate that hybrid composite shows more resistance to corrosion.
Keywords
Aluminum, Composites, Silicon Carbide, Graphite, Corrosion Rate.Full Text
- Corrosion Studies on Aluminium-7075 Alloy and its Composites by Weight Loss Method
Authors
1 Department of Chemistry, BTL Institute of Technology and Management, Bommasandra Industrial Area, Bangalore, Karnataka, IN
2 R&D Centre, Department of Engineering Chemistry, Ghousia College of Engineering, Ramanagaram, Bangalore, Karnataka, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 11Sp (2016), Pagination: 23-27Abstract
Aluminium 7075 alloy constitutes a very important engineering material widely employed in the aircraft and aerospace industry for the manufacturing of different parts and components. It is due to its high strength to density ratio that it is a sought after metal matrix composite. At sub-zero temperatures, its strength increases, thus making them a useful low-temperature alloy. Here we emphasise on corrosion studies of Al7075 Metal Matrix Composites. The aluminium metal matrix composites (MMCs) are prepared using Silicon Carbide and Graphite. Al-7075 series alloy is used to prepare composites with varied percentage of SiC and hybrid composite (HMMCs) with equal amount of SiC and Graphite by liquid metallurgy technique using vortex method. Specimens for corrosion test were prepared as per ASTM standard of as casted composites. The corrosion studies were carried out for 7 days by weight loss method by immersing the as casted specimens in acid chloride, acid sulphate, acid nitrate and neutral chloride medium at room temperature for 24 hrs and the weight loss is monitored continuously for a weak. The Corrosion rate is measured based on Weight loss of the specimens and it was assessed by plotting graph of corrosion rate against time in hours, using origin-8 software. The studies have revealed that the rate of corrosion is lower in neutral chloride medium when compared to other mediums.
Keywords
Aluminium Composites, Acid Chloride, Neutral Chloride, Rule of Mixture, Weight Loss.Full Text