If tires are removed you could spin balance them but there's no need for an alignment. Unless, of course, the alignment is off ...as in... the car is wandering on a flat road, etc..
When you change front struts it becomes essential to redo the alignment as that is normal maintenance. On some cars there are struts all around plus some cars also have the ability to do a rear alignment adjustment. If you have struts changed on the back, then you could need an alignment there, but I'll defer to a mechanical expert on that one.
I've never heard of this issue of sulphides on wheels and the need to grind off. Though, admittedly, I'm not an expert but it sounds unlikely to me.
Maybe rust (oxides) to be ground off ...but...?