The acid might attack the aluminium, but the resulting salts may help the tannins to coagulate. If you're following that up with base and extraction into NPS, the aluminium shouldn't be too much of an issue,
except that resulting aluminium hydroxide particles
might contribute to formation of emulsions (but only might).
Thick aluminium pans erode only fairly slowly in the presence of food acids, but caustic base will attack aluminium much more rapidly, along with the evolution of much hydrogen gas. It's definitely important to avoid using aluminium in the base phase!
“There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work."
― Jacques Bergier, quoting Fulcanelli