I can tell you it's a rapier. The rapier style dates back to the 1500's. Not saying that's how old yours is though because they are still made today. Yours does look to have some age on it though, was it dug or found in a barn or something?
I don't know enough about them to give you any kind of date, but I would suggest contacting someone with a good knowledge of antique arms and have it looked at. If it's an early piece it's an amazing find. Even if it's not it's still a great find, and definitely not scrap metal....