Impacts of Heat Treatment on the Electrochemical Properties of AA3003 expose to 0.1M Hydrochloric Acid Media

The Effects of Heat Treatment on the Electrochemical Properties and Corrosion of Aluminium Alloy AA8011 in an Aqueous Acid Media

“…Comparing the effects of heat treatment on alloys of AA3003 Okeoma et al [21], and a different composition of AA8011 Okeoma, et al, [20] in 0.1 M H 2 SO 4 and the present report, it is evidence that AA8011 is superior to AA3003, this adds to the observations made by Delijic et al [23] on the mechanical properties. The positive effects of heat treatment on this AA8011 alloy in the acid environment open up further opportunity to understand the properties of the material and hence usher in another sphere to the application of the alloy.…”

“…But comparing the obtained value with those observed in another variant of AA8011 Okeoma, et al [20] in which the charge transfer resistance increased in order control < air quenched < oven quenched samples. It may therefore be misleading to draw conclusion on the effect of heat treatment on the impedance spectra, but the variation in the spectra maybe attributed to the type of intermetallic particles present, which is a result of heat treatment the alloy was subjected to.…”

“…These are in parallel with R L, which is the resistance offered to the migrating ions in the solution that manifested in the magnetic fields with its associated series inductance L, which becomes dominant within a certain frequency range for a particular specimen, Okeoma, et al [21]. From Fig.…”

Correlation between microstructure and corrosion behavior of two Al-Fe-Si alloys

“…The EIS results obtained in this work are in agreement with the ones reported in the literature that takes capacitive loops associated with aluminum oxide passive layers and the inductive loops with ions adsorption on the oxide film interface .…”

“…The model proposed shows two time constants, with R ox being related to charge transfer processes through the thin oxide film on the alloy surface and CPE ox , probably associated to a series connection between the double layer capacity ( C dl ) and the oxide layer capacity ( C ox ) . The R L / L pair, on the other hand, is likely due to the relaxation of adsorbed species, mainly sulfate and oxygen ions, on the metallic substrate exposed underneath the defects in the thin oxide .…”