Influence of Thermal Ageing on the Electrochemical Corrosion Behaviour of Al-3.5% Cu-0.8% Mg/DOUM Palm Nut Shell Ash Particulate (DPNSAp) Composite

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@article{1705170,
      author = {Mahdi Sani Udu, Auwal Kasim, Umar Shehu, Evarastics Polycarp},
      title = {Influence of Thermal Ageing on the Electrochemical Corrosion Behaviour of Al-3.5% Cu-0.8% Mg/DOUM Palm Nut Shell Ash Particulate (DPNSAp) Composite},
      journal = {Iconic Research And Engineering Journals},
      year = {2023},
      volume = {7},
      number = {5},
      pages = {45-54},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1705170.pdf},
      abstract = {The influence of thermal ageing on the electrochemical corrosion behavior of Al-3.5%Cu-0.8%Mg/Doum Palm Nut Shell Ash particulate (DPNSAp) composite was investigated. DPNSAp reinforcement was characterized using Zetasizer Analyser and X-Ray Diffractometer (XRD). The composite was developed via the stir casting method by incorporating 3.0, 6.0 and 9.0wt% (DPNSAp) reinforcement with the base alloy as control. Solution heat treatment was carried out on the developed samples and corrosion examinations were carried out using Linear Polarization Resistance (LPR) method. Morphological examination was carried out on the as-cast and aged samples using a Scanning Electron Microscope (SEM). The results obtained from Zetasizer Analyzer showed that the reinforcement had an average particle size of 639.6 nm, and a Poly Dispersion Index (PDI) of 0.595 which is an indication of wide variation in particle sizes. Additionally, characterization of the reinforcement by (XRD) revealed the presence of 41% Quartz (SiO2), 44% Albite (Na.Al.Si3.O8), 4.2% Muscovite (H2.K.Al3.(SiO4)3), 6.9% Orthoclase (Al2O3.K2O.6SiO2), 0.013% Chlorite (Al-Fe-SiO2-O) and 4.1% Sylvite (KCl). Linear Polarization Resistance (LPR) of the as-cast and aged samples showed a decrease in the corrosion rate from 4.15 to 1.11 mils/year for the control sample and 1.87 to 1.39 mils/year for the 9% reinforced sample. Morphological examination of the base alloy showed pits and craters with CuAl2 intermetallics within the Al-Matrix which after exposure to artificial seawater showed localized corrosion along grain boundaries. The morphology of the reinforced samples showed reinforcement particles agglomerating along grain boundaries and cracks in the matrix which upon ageing were dispersed within the matrix.},
      keywords = {Aluminium Composite, Doum Palm, Stir casting, LPR, Electrochemical corrosion.},
      month = {November},
  }