âSpoons come in many different sizes and are not precise enough to measure a childâs medication,â said pediatrician Ian Paul, MD, FAAP, lead author of the policy statement. âFor infants and toddlers, a small error â especially if repeated for multiple doses â can quickly become toxic.â.
Copper and bronze do not contain any iron, and only iron can rust (because rust is defined as iron oxide, a compound of iron and oxygen); so the answer is that steel will rust the fastest and copper and bronze will never 'rust'. But, yes, copper and bronze do tarnish, they do corrode.
The iron oxide particles remain suspended in the water, but when the water evaporates, the particles remain, forming a reddish coating on the surface of the iron. Without the presence of water, objects cannot rust. Other metals besides iron and steel can rust when exposed to moisture, but not all rust is ârust-colored.â For instance, when copper or bronze rusts, it turns green. The green crust is called a patina.