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.
Steel rusts because it contains iron. Iron decomposes over time when it comes in contact with oxygen. Gold, silver and platinum are all pure metals that don't contain iron and, therefore, don't rust. Stainless steel doesn't rust because it is an alloy that contains the metals chromium and nickel. Chromium must comprise at least 10 percent of the steel alloy for stainless steel to be rust resistant.