Corrosion and Metal Extraction Quiz

Corrosion is the spontaneous destruction and consequent loss of a metal/alloy due to unavoidable chemical/electrochemical attack by the environment.

Many metals exist in nature in combined form as their oxides, carbonates, sulphides, chlorides, and silicates (except noble metals) such as Au (gold), Pt (Platinum) etc.

Considerable amount of energy is required during the extraction of ores because compounds are in a lower energy state than the metals, so the metals need to be reduced to their metallic state from their ores.

<p>When metals are put into use in various forms and get exposed to the environment such as dry gases, moisture, liquids etc., the exposed metal surfaces begin to decay by conversion into a compound.</p> Signup and view all the answers