Identification of the critical microstructural parameters on the corrosion behaviour of commercially pure aluminium alloy
Source abstract
Abstract
The influence of microstructure on the corrosion behaviour of commercially pure Al alloy in a chloride-containing sulphate solution was systematically investigated. An isothermal annealing at 300 °C led to an increase in the density of high-angle grain boundaries (HAGBs) and decrease in number density of intermetallic particles (IMPs). The grain size did not affect the pitting potential, but the corrosion current decreased with increase in the density of HAGBs. IMPs acted as pit initiation sites and influenced the pitting potential. After pit initiation, pit propagation occurred along HAGBs; pit width and depth were strongly dependent on the density of HAGBs.
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Research context
OpenAlex topics: Aluminum Alloy Microstructure Properties · Microstructure and mechanical properties · Corrosion Behavior and Inhibition
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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