Question

Write a note of Chrome plating.

Answer 1

Chrome plating is a method of coating which is used to create a thin layer chromium metal on the surface of the material. Chrome plating can be used for corrosion and wear resistance. Chrome plating increases the hardness, durability, and corrosion resistance of a surface, while also creating a shiny and smooth surface that is easier to clean.

Complete step by step answer:
Chrome plating, often referred to simply as chrome, is a technique of electroplating a thin layer of chromium onto a metal object. The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness.
There are two main types of chrome plating -
Decorative chrome plating - This type employs a layer of nickel and chromium. The nickel gives the surface of the object shine and chromium helps in increasing the corrosion resistance.
Hard chrome plating - It increases the corrosion resistance of the material. It is commonly applied to various types of steel. It also increases the wear resistance.
Chromium plating is traditionally made from a solution of chromic acid ( $Cr{O_3}$ which forms ${H_2}Cr{O_4}$ after dissolving in water) and sulphuric acid $\left( {{H_2}S{O_4}} \right)$ using insoluble anodes. The chromium is reduced to metal from the hexavalent state due to the catalytic effect of sulphate ions.

Note: The chrome plating process is very expensive because of many factors. There is a use of a lot of electricity. Stripping the old coatings from your parts creates hazardous waste that is much more expensive to separate and treat than chrome plating rinse water. Regulatory compliance is very time consuming and therefore expensive.