Corrosion studies of Al-Cu Particulate composites produced through liquid metallurgy route

S. MADHUSUDAN*, M.M.M. SARCAR¹, N.R.M.R. BHARGAVA² and K.V. RAO³

*Mechanical Engineering Department, Sir C.R.Reddy College of Engineering, Eluru - 534 007 (India). ¹Mechanical Engineering. Department, A.U College of Engineering, Visakhapatnam - 530 003 (India). ²Metallurgical Engineering. Department, A.U College of Engineering, Visakhapatnam - 530 003 (India). ³Mechanical Engineering Department, Sir C.R.Reddy College of Engg, Eluru - 534 007 (India).

Received on December 10, 2009 and accepted on January 10, 2010

ABSTRACT

Attempts have been made to disperse fine Cu filings in aluminium matrix by conventional stir cast technique to produce metal-metal composites. SEM-EDX analysis shows a gradual variation in chemistry from dispersoid to the matrix. Production of composites show an ease of dispersion of metallic dispersoid compared to a ceramic one. Corrosion study in terms of loss in weight in acid media has been investigated. Composite show a lesser dissolution rate compared to the alloy having same composition, at different concentrations of the corrosive media. Composite with higher concentration of dispersoid show reduced corrosion resistance.

Keywords : Stir casting, Dispersion, Metal-metal Composite, Microstructure, Corrosion.