Corrosion behaviour of Stir-Squeeze cast optimised AA7075 CuCNT/CuGrP reinforced metal matrix composites

The present article deals with reinforced AA7075 CuCNT/CuGrP Hybrid nano Composite. To find the corrosion resistance of such an alloy composites, was made by compo casting (Stir- Squeeze) are commonly used for the production of components, such as cylinders, pistons, pumps, valves and combustion chambers, which in service may experience a corrosion phenomenon. Initially different percentage of microstructure, hardness, and mechanical properties were measured. Corrosion tests were carried out according to different mass fraction of copper coated CNTs and copper coated GrP was added to the AA7075 casting and the composition is optimised. The electrochemical corrosion behaviour of CuGrP and CuCNT reinforced AA7075 were studied using Electrochemical Polarization Technique (ACM Gill) and Electrochemical Impedance Spectroscopy Technique. The phase analysis of the composites were done by XRD, microstructure by optical microscope even severity of corrosion is measured optical microscope. The corrosion behaviour of the composites and the possible mechanism for the effect of CuCNT and CuGrP in the properties have been studied in detail in this paper.