Just started using star san a weeks ago and it work wonderfully. The question is that it says its corrosive so is it safe to use in kegs and other metals or should I find an alternative? If so what would you suggest?
It's definitely fine to use on stainless- that's pretty much what it's designed for. Lots of people keep kegs of the stuff around just to keep it handy. If you have any aluminum, it will eat right through the oxide layer and corrode the metal, though.
It's fine to use on stainless. Although I wouldn't store it in stainless for long periods of time. I've listened to a few podcasts\interviews with charlie daniels (worked @ 5 star & created star-san) who advised against extended contact time with stainless.