Corrosion of Metals
Chemistry ⇒ Metals and Non-metals
Corrosion of Metals starts at 8 and continues till grade 12.
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See sample questions for grade 12
A metal sample loses 0.5 g of mass after 30 days due to corrosion. Calculate the average rate of corrosion in mg/day.
A steel bridge is exposed to a coastal environment. Suggest two methods to protect it from corrosion and explain your choices.
Describe the chemical reaction that leads to the rusting of iron.
Describe the difference between dry and wet corrosion.
Describe the effect of temperature on the rate of corrosion.
Describe the role of moisture in the corrosion of metals.
Describe the role of oxygen in the corrosion of iron.
Explain the principle of cathodic protection in preventing corrosion.
Explain the term 'passivation' in the context of corrosion.
Explain the term 'pitting corrosion' and give an example of where it might occur.
Explain why aluminum does not corrode as rapidly as iron, even though it is more reactive.
Explain why copper roofs develop a green layer over time.
Explain why iron corrodes faster in saline water than in pure water.
Explain why magnesium is used as a sacrificial anode in the protection of underground pipelines.
Explain why painting a metal surface helps prevent corrosion.
Name one alloy that is resistant to corrosion and explain why.
State one environmental factor that accelerates the corrosion of metals.
What is corrosion? Define the process in your own words.
