What are the differences between aluminum and other metals in terms of biodegradability?

Aluminum is not biodegradable in the traditional sense, meaning it does not break down into simpler substances through natural processes. It is highly resistant to corrosion and can persist in the environment for a long time. Unlike metals like iron, which rust and degrade over time, aluminum remains largely intact. However, aluminum can react with other elements in the environment, such as oxygen, to form a thin layer of aluminum oxide on its surface, which can alter its properties. Other metals like magnesium and zinc are more biodegradable as they can corrode and break down more readily in certain conditions, contributing to their use in biodegradable materials.