Prevention of Corrosion
Chemistry ⇒ Metals and Non-metals
Prevention of Corrosion starts at 8 and continues till grade 12.
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See sample questions for grade 9
Describe how alloys can help prevent corrosion.
Describe how galvanization protects iron from corrosion.
Describe how the use of alloys such as bronze and brass helps in preventing corrosion compared to pure metals.
Describe one disadvantage of using galvanization to prevent corrosion.
Describe one way in which corrosion can be detected early in metal structures.
Describe the process of sacrificial protection in preventing corrosion.
Explain how painting prevents corrosion of metals.
Explain why aluminum does not corrode easily even though it is a reactive metal.
Which of the following is a benefit of using cathodic protection?
(1) It makes metals heavier
(2) It prevents corrosion
(3) It changes the color of metals
(4) It increases electrical conductivity
Which of the following is a disadvantage of using paint to prevent corrosion?
(1) It is expensive
(2) It can wear off over time
(3) It makes the metal heavier
(4) It changes the metal's properties
Which of the following is an example of sacrificial protection?
(1) Painting iron gates
(2) Coating iron with zinc
(3) Using stainless steel
(4) Applying grease
Which of the following is NOT a component of rust?
(1) Iron
(2) Oxygen
(3) Water
(4) Carbon dioxide
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 presence of __________ in the air increases the rate of corrosion of iron.
Fill in the blank: The process of adding a thin layer of another metal to a metal object to prevent corrosion is called __________.
True or False: All metals corrode at the same rate.
True or False: Applying grease or oil to metal surfaces can help prevent corrosion.
True or False: Corrosion can be completely stopped by using preventive methods.
True or False: Corrosion can weaken the structure of bridges and buildings.
