This question is about the corrosion of metals and methods used to prevent it.
a.[3]
A student set up three environmental chambers to investigate the conditions required for steel to rust, as shown in the diagram below:
Explain what would happen to the steel plate in each of the three chambers after one week.
b.[2]
Magnesium blocks are often connected via a conducting wire to underground steel natural gas pipelines.
Explain how this prevents the steel pipeline from corroding.
c.[2]
Although titanium is a highly reactive metal positioned higher than iron in the reactivity series, titanium dental implants do not corrode when exposed to saliva and oxygen in the mouth.
Explain why.