Yes and no.
Some organisms can break down some metals. In everyday life, it is far more common for metal to degrade chemically (via reaction to water, or the air, or soil acidity etc.)
In an environmental context, whether metal is degraded biologically or chemically, it can still lead to problems. For instance, many metal compounds are poisonous, a good example being Mercury, which will usually pass through an organism without harming it, but when converted into methylmercury by microbes (or by chemical plants) becomes highly toxic (see Minamata disease).
Biodegradable refers to products or materials that may be broken down by organic means, or by other organisms. Metals break down by oxidation. Biodegradable materials also become part of the environment, putting nutrients back into the soil. Most metal or the oxides of metals pollute the soil and cause many organisms to die.
It can take tin cans anywhere from 50 to 100-years to biodegrade. The decomposition is very dependent on the environment where the material is decomposing.
Depends on which metal. Also, it depends on what you mean by degrade. The metal molecules will never disappear, they will just disperse or get incorporated into molecules. But in general, a LONG TIME.
how long does a crisp packet to biodegrade
It takes 1000 years for it too biodegrade and that is if it is buried. :)
How long it takes for an aluminum can to biodegrade
plastic
about a week
2years
100 millennium
Aluminium... No. Tin... Yes.
Eraser is made out of rubber. If exposed under the sun, an eraser will take between 50 to 80 years to biodegrade.
Foam? Like old coffee cups and such? They never biodegrade. Unlike plastic that will take a thousand years foam will never biodegrade. In ten millions years of something is digging in the ground, it could find your cup that you left behind.