Electrochemical investigation of calcined agrowastes powders on friction stir processing of aluminium-based matrix composites

The ultimate goal of this report was to use eco-friendly calcined agro-waste powders such as coconut shell ash (CSA), cow bone ash (CBA) as well as palm kernel shell ash (PKSA) and to analyze the percentage inhibition performance efficiency (percent IPE) on friction stir processed (FSP) of super strength aluminum alloy 7075-T651. The motive behind this study was to establish whether agro-waste powders could serve as a successful alterative to metallic powders for enhancing as well as corrosion resistance in aluminum alloy 7075-T651. The study reported three different carbonaceous agro-waste powders such as PKSA, CBA and CSA in 3.5 percent NaCl as reinforcements and corrosion prevention and confirmed that PKSA as corrosion susceptible performed better than CBA and CSA under the same environmental factors and can be an acceptable substitute for metallic powders as a corrosion protection. The results established that PKSA has the least corrosion rate of 0.4357 mm/year and this was followed by the reinforcement from CSA with 0.8291 mm/yr and lastly 1.42284 mm/yr for CBA. In the same vein, reinforcing with PKSA yielded the highest polarization resistance with 1075.6 X and this was followed by the reinforcement of CSA with 564.4 X and CBA of 276.42 X.