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Reliability Level of Al-Mn Alloy Corrosion Rate Dependence on Its As-Cast Manganese Content and Pre-Installed Weight in Sea Water Environment

C. I. Nwoye, P. C. Nwosu, E. C. Chinwuko, S. O. Nwakpa, I. E. Nwosu, N. E. Idenyi

American Journal of Mining and Metallurgy. 2014, 2(3), 57-63 doi:10.12691/ajmm-2-3-4
  • Figure 1. As-cast Al-Mn alloy
  • Figure 2. Corroded pieces of Al-Mn alloy cut and exposed to sea water environment
  • Figure 3. Surface structure of Al-Mn alloy (a) control (b), (c) (d), (e) and (f) for as-cast manganese contents: 2, 2.5, 2.8, 3 and 4 wt % respectively. (x200)
  • Figure 4. Coefficient of determination between Al-Mn alloy corrosion rate and as-cast manganese content as obtained from the experiment
  • Figure 5. Coefficient of determination between Al-alloy Mn corrosion rate and as-cast manganese content as predicted by derived model
  • Figure 6. Coefficient of determination between Al-Mn alloy corrosion rate and its pre-installed weight as obtained from the experiment
  • Figure 7. Coefficient of determination between Al-Mn alloy corrosion rate and its pre-installed weight as obtained from the experiment
  • Figure 8. Comparison of the Al-Mn alloy corrosion rate (relative to as-cast manganese content) as obtained from experiment and derived model
  • Figure 9. Comparison of the Al-Mn corrosion rate (relative to alloy pre-installed weight) as obtained from experiment and derived model
  • Figure 10. Variation of model-predicted corrosion rate with associated deviation from experimental results (relative to as-cast manganese content)
  • Figure 11. Variation of model-predicted corrosion rate with associated deviation from experimental results (relative to pre-installed weight)