mike, yes you can use zinc covered hvac pipe for your wood stove. however,you will have a huge ammount of creosote buildup inside the pipe if you run it outside.see, the steam off the wood burning will condense in the inside of the pipe because it will reach a piont where the outside temps will cool the pipe below 212 degrees therefore volitiles in the steam will condense,build up layer after layer,and flake off in big sheets inside the pipe.if you use it inside your house,yes,it will burn the zinc off the outside the pipe,but no,it wont hurt anything.also,my current setup at my 2 story rock house is a stick of 6 inch pipe inside a stick of 8 inch pipe and common fiberglass batt insulation packed between the two as an insulating barrier.it keeps the steam from condensing on the inside of the pipe and causing creosote.if you do use it on the inside going to your flue or side exit,put in a tee instead of an elbow,it makes cleanout easier.put a cap on the unused side and pop it off to clean it out.also,if you use it on the outside with no form of insulation and you burn the zinc off the pipe will rust,fast! good luck my friend.