Question

fill in the blanks _______ air causes metal to corrode easily

Answer 1

Moist air causes metal to corrode easily.

Explanation:

• Humidity and condensed water vapour on the surface of metals are the main causes of corrosion.
• Corrosion is a kind of electrochemical reaction.
• It takes place when the atoms on the metal surface are oxidized and eventually damage the whole surface.
• During this electrochemical process, the metals lose electrons to oxygen in the atmosphere.
• Since oxygen is reduced (gains electrons), it forms an oxide with the metal known as rust.

Answer 2

Moist air causes metal to corrode easily.

• In the presence of air and water (moisture), metal oxide is formed.
• The metal oxide is a rust of usually reddish brown color which will develop on the metal.
• This is the reason why certain metals, such as iron, should be kept away from air or moisture.
• A humid air also has high water content and such metals should be avoided from humid air.