Question

Why is Iron pillar rust free?

Answer 1

Hint :Corrosion is a natural phenomenon that transforms a refined metal into a more chemically stable form like oxide, hydroxide, or sulphide. That is the degradation of products over time as a result of chemical and/or electrochemical reactions with their surroundings.

Complete Step By Step Answer:
Corrosion is a natural phenomenon that transforms a refined metal into a more chemically stable form like oxide, hydroxide, or sulphide. That is the degradation of products over time as a result of chemical and/or electrochemical reactions with their surroundings.
The accumulation of rust, a combination of iron oxides, on the surface of iron artefacts or materials is referred to as rusting of iron. In a water-rich climate, rust is created by a redox reaction between oxygen and iron (such as air containing high levels of moisture). The creation of a coating of a red, flaky material that quickly crumbles into powder characterises the rusting of iron.
This is an excellent example of metal degradation, in which metal surfaces are degraded into more chemically inert oxides. However, the word "rusting" is often used to describe the deterioration of iron or iron-alloy objects.
Rust is formed when iron (or an alloy of iron) is exposed to oxygen in the presence of moisture. This reaction is not instantaneous; rather, it takes place over a long period of time. Iron oxides are formed when oxygen atoms bond with iron atoms. The relations between the iron atoms in the object/structure are weakened as a result.
The oxidation state of iron increases as a result of the rusting reaction, which is caused by the loss of electrons. Rust is primarily composed of two types of iron oxides that differ in the oxidation state of the iron atom. These are the oxides:
Iron(II) oxide is also known as ferrous oxide. This compound has an oxidation state of +2 and the chemical formula FeO.
Iron(III) oxide, also known as ferric oxide, is a compound in which the iron atom has an oxidation state of +3. $ F{e_2}{O_3} $ s is the molecular formula for this substance.
Iron is a reducing agent, while oxygen is an excellent oxidising agent. When exposed to oxygen, the iron atom readily gives up electrons.
The below are some of the reasons that an iron pillar hasn't rusted:
a) The iron used in the pillar's production is of high purity.
b) There is a lot of phosphorus in it.
c) It has a lower sulphur content.
d) No other metals are present.
e) The forge welding on the pillar is easier.
f) The pillar's base is coated with cinder.
g) Metal mass impact
h) The weather conditions, which should be dry and uncontaminated.

Note :
Rust is formed when iron (or an alloy of iron) is exposed to oxygen in the presence of moisture. This reaction is not instantaneous; rather, it takes place over a long period of time. Iron oxides are formed when oxygen atoms bond with iron atoms. The relations between the iron atoms in the object/structure are weakened as a result.