2. To Study the ‘Rusting of iron’ and corrosion on copper and silver articles , harmful effect of
rusting of iron and corrosion and methods to prevent rusting on iron articles .[ material required :
an iron nail, Copper wire or copper article in your kitchen , silver article etc.] For Odd Roll no.
Guidelines : How to write the project report : Students are required to get their report written
on A4 plain sheets and to represent in the best possible manner. The project report should be
written in the following sequence :
1. Aim of the project
2. Introduction or theory : Information collected from various sources related totopic.
3. Procedure followed : write the details of the experimental work you have followed
4. Observation : Record your observations in the form of table , graphs or photographs.
5. Conclusion : Give analysis of the data and compare your data with those available in literature
and draw conclusions.
6. Diagrams + Original pictures taken of observation to be pasted
7. References or Bibliography : Give the list of books , internet websites , you have consulted , for
the project work.
Answers
Answer:
Rusting happens on the surface of iron objects making it coarse and flaky. It also makes the iron objects fragile. Rusting happens quicker in a humid environment. As a result, it is easier for water tanks and pipes to get rusted. Therefore, various methods are used to reduce the effect of rusting. Getting wounded from a corroded metal object especially rusted iron objects can prove to be dangerous.
Chemistry of Rusting of Iron
Corrosion of any metal is a natural process. It results in the conversion of the metal into its chemically stable form that can be either oxides or hydroxides or sulphides.
Rusting is a type of Chemical Change. It results in the formation of Iron Oxide which is an entirely new substance. Chemical Reaction of Rusting is as follows:
Iron + Oxygen (from environment) + Water (Humidity) —> Iron Oxide (Rust)
Fe + O2 + H2O —> FeO and Fe2O3
Iron occurs naturally in two different forms: Iron (II) and Iron (III).
Scientific Name of Oxide of Iron (II) is Ferrous Oxide (FeO).
Scientific Name of Oxide of Iron (III) is Ferric Oxide (Fe2O3).
Prevention from Rusting
Methods used to prevent Rusting of Iron are as follows:
Alloying – Since Rusting of Iron is a chemical process that happens because the metal is attaining more stable chemical state, alloying (mixing) the iron with other stable metals or alloys can slow down the process of rusting.
Galvanizing – Galvanizing a metal object means to coat the surface of that object with a layer of metallic zinc. Also, it is an inexpensive procedure. In conclusion, it will provide it with protection against rusting.
Coating and Painting – Coating the surface of a metal object with a layer of either Paint or Varnish will break the contact between the surface and atmospheric oxygen making it consequently immune to rusting.
Humidity Control – Controlling the humidity of the environment is also a solution. Therefore, the chances of the metal object rusting will reduce