Corrosion of metals is minimised in practice by:
Coating with more reactive metal (sacrificial protection)
Corrosion is minimised through sacrificial protection, in which a more reactive metal such as zinc is coated over the metal that needs protection, as done in galvanisation. Since the reactive coating oxidises preferentially, it sacrifices itself and shields the underlying metal from attack. Increasing surface area, keeping metals moist, or exposing them to acidic fumes all speed up corrosion instead of preventing it.
Similar Questions
Reactivity series of metals is mainly based on tendency to:
A displacement reaction will most likely occur when:
Which one of the following changes is most appropriately classified as a physical change with underlying chemical interaction reversible on conditions?
Rusting of iron in presence of moist air is an example of:
Important Questions from Chemical Reaction
An iron nail dipped in copper sulphate solution turns brown. This is due to which one of the following types of reactions?
Copper sulphate crystals available in the market are blue coloured crystals. By careful heating, they turn to white colour. Which one of the following is responsible for the blue colour?
Airbags work on the principle of a chemical reaction triggered by the impact producing a gaseous product that causes a sudden volume change. Which one among the following chemical conversions is responsible for this?
Which one of the following is the correct reactivity series with water?
Silver artefacts get tarnished in air due to the formation of
