Question

Define the following. a) Rusting b) Galvanisation c) Crystallisation​

Answer 1

Answer:

a)Rusting is oxidation of iron or iron objects. It takes place in the presence of air and moisture. It is a slow process. Due to rusting, rust is formed on iron objects. It is a red-orange colored iron oxide which is formed by the oxidation of iron in presence of oxygen and moisture or water.

b)Galvanization or galvanizing is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are submerged in a bath of molten hot zinc.

c)Crystallisation is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.

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Answer 2

A) the reddish brittle coating formed on iron especially when chemically attacked by moist air and composed essentially of hydrated ferric oxide. b : a comparable coating produced on a metal other than iron by corrosion. 

B) The most common hot dipping process for industrial applications is galvanizing, which refers to the coating of zinc over iron or steels for rust proofing. It is an extremely versatile and easy means of providing corrosion protection for construction materials exposed to atmospheric conditions

C) Crystallization or crystallisation is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas