the galvanised article is protected against rusting even if the zinc coating is broken .why?
Answers
Answer:
ANSWER(1)
Zinc is more reactive than iron and so will always oxidise before iron. Even if the zinc is just in a large block and iron is fully exposed, it will still oxidise first; this is how sacrificial protection of ships works.
To be oxidised, a metal must lose electrons. Zinc, being more reactive can give up electrons easier than iron can. If an iron atom lost an electron, another would be conducted from the block of zinc to replace it. This will continue until all the zinc has oxidised or unless it is no longer in direct contact.
ANSWER(2)
The galvanised article is protected against rusting even if the zinc coating is broken.Can you reason this out? ... Zinc is more reactive than iron, and loses electrons more easily. The outer layer of zinc of any galvanized material, reacts with the atmospheric oxygen to form Zinc Oxide (ZnO), which is stronger than Zinc
Explanation:
Answer:The main reason behind this is that Zinc is more reacrive than Iron.So zic will actively react with corrosive reagent .
Explanation: