I forget, what’s the pH of StarSan? The FDA now says galvanized steel is safe for use with food if it’s not too acidic, like below 5.5 – I’d have to look it up again.
i taste tested one of the CPF bottles I filled and it seems fine.
I can’t imagine that the reaction would be all that significant in 1-2 hours time. plus the bottles and equipment was let dry beforehand - not like I’m drinking the star san solution.
Galvanized = Zinc
Zinc is dissolved by acid and excessive Zinc is toxic. I wouldn’t risk it.
Wikipedia has a pretty good write up. The toxicity part is about 2/3 of the way down.
Though the results of scientific studies are mixed, there are some cold remedies and lozenges marketed that claim zinc is effective at shortening the common cold. Maybe you should just save the brew for the next time you have the sniffles. If the zinc doesn’t work, you can just have a few more beers until your cold “goes away.”
It’s probably in the parts per million then diluted into 12oz of beer in the worst case scenario. I think 5 star chem should be able to put your mind at ease.