This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Both metal and copper oxidize when exposed to oxygen and this is a natural process. Copper that is exposed to the outside environment is more likely to turn green and that is why copper vases and decorative pieces in gardens are often green.
Does anyone know which metals (or alloys) does not rust (or react with) when they are regularly exposed to water and subsequently oxygen? I have a container that currently has a system of copper piping. This container is filled with water, but regularly the water level drops below the copper piping, exposing the copper to oxygen. Eventually, the copper starts to rust, so I need an alternative metal/alloy as a replacement of copper.