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.
Make sure the object is brass. Some other metals look similar to brass, but will respond differently to these aging methods. The wrong treatment could corrode your object, so take your object to an antique shop or other expert if you can't identify it yourself. Clean brass has a bright, golden brown appearance. The most similar metals in appearance are copper, which is brown or pink-brown, and bronze, which is a much darker brown.