Prevention of Corrosion
Chemistry ⇒ Metals and Non-metals
Prevention of Corrosion starts at 8 and continues till grade 12.
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A ship's hull is protected from corrosion by attaching blocks of a more reactive metal. What is this method called?
A steel water tank is coated with a layer of zinc. What is this process called and why is it effective?
Describe how electroplating helps in preventing corrosion.
Describe the principle of cathodic protection in preventing corrosion.
Explain how painting prevents corrosion of metals.
Explain why iron corrodes faster in coastal areas.
A ship's hull is protected from corrosion by attaching blocks of a more reactive metal. What is this method called?
A steel water tank is coated with a layer of zinc. What is this process called and why is it effective?
Which method is most suitable for protecting iron bridges from corrosion?
(1) Painting
(2) Alloying
(3) Electroplating with gold
(4) Leaving it exposed
Which of the following is a chemical method of preventing corrosion?
(1) Painting
(2) Applying grease
(3) Using anti-rust solutions
(4) Covering with plastic
Which of the following is NOT a factor affecting the rate of corrosion?
(1) Presence of moisture
(2) Temperature
(3) Shape of the metal
(4) Presence of salts
Which of the following is NOT a method to prevent corrosion?
(1) Painting
(2) Galvanization
(3) Rusting
(4) Oiling
Fill in the blank: The brown flaky substance formed on iron due to corrosion is called __________.
Fill in the blank: The chemical formula for rust is __________.
Fill in the blank: The process of depositing a thin layer of a less reactive metal on iron to prevent corrosion is called __________.
Fill in the blank: The process of mixing metals to form an alloy that resists corrosion is called __________.
True or False: All metals corrode at the same rate.
True or False: Alloying iron with chromium and nickel increases its resistance to corrosion.
True or False: Applying grease or oil to metal surfaces can help prevent corrosion.
True or False: Corrosion can only occur in the presence of water.
