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.
Ensure that the metal you are working with will rust. Only metals containing iron will rust, and some iron alloys will rust slowly or not at all. Stainless steel, an alloy of iron and chromium, will be very difficult to rust. Cast iron or wrought iron will rust most easily.