Eventually? Yes the wire will oxidize and corrode, what doesn't? I recently purchased a used pair of expensive cables that were a few years old. When I removed one of the banana connectors the amount of corrosion was much more than expected. These cables connectors had been crimped, soldered and wrapped in shrink tube and still corroded. It's a matter of time and environmental factors. With the connectors you're using it would be easy to remove any corrosion by cutting off affected wire and reterminating.
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