Discuss the methods by which rusting of iron can be prevented.
Discuss the methods by which rusting of iron can be prevented.
Corrosion: The degradation of the metal surface when exposed to air, moisture, or a chemical (such as an acid) in order to form metal oxide. For example, rusting of iron.
Rusting of Iron: the destruction of iron when the iron is exposed to air and water it reacts with them and forms a red-brown layer of iron oxide known as rust and the process is known as rusting. The below picture clearly shows the red-brown colored layer of rust on the metal surface.
Factors affecting rusting:
Moisture: the rusting of iron enhances the presence of moisture.
Acid: In presence of acid the rate of corrosion increases thus the rusting of iron also increases.
Salts and electrolytes: also increase corrosion.
Methods of prevention:
Galvanization: it is the process of coating the layer of zinc over iron or steel by the process of electrolysis to protect the surface of iron and steel from rusting.
Electroplating: If the metal layer is coated with Chromium, Nickle, or Aluminium with the help of electrolysis then the process is known as electroplating.
Painting: the rusting of iron or corrosion can be prevented by painting the metal surface with paint as it forms a protective layer on the metal surface which protects it from air and water.
Grease and varnish: it also forms a thin layer on the metal surface preventing it from corrosion.
Alloys: conversion of pure iron to its alloy (which is corrosion resistant) by mixing some impurities.
Corrosion: The degradation of the metal surface when exposed to air, moisture, or a chemical (such as an acid) in order to form metal oxide. For example, rusting of iron.
Rusting of Iron: the destruction of iron when the iron is exposed to air and water it reacts with them and forms a red-brown layer of iron oxide known as rust and the process is known as rusting. The below picture clearly shows the red-brown colored layer of rust on the metal surface.
Factors affecting rusting:
Moisture: the rusting of iron enhances the presence of moisture.
Acid: In presence of acid the rate of corrosion increases thus the rusting of iron also increases.
Salts and electrolytes: also increase corrosion.
Methods of prevention:
Galvanization: it is the process of coating the layer of zinc over iron or steel by the process of electrolysis to protect the surface of iron and steel from rusting.
Electroplating: If the metal layer is coated with Chromium, Nickle, or Aluminium with the help of electrolysis then the process is known as electroplating.
Painting: the rusting of iron or corrosion can be prevented by painting the metal surface with paint as it forms a protective layer on the metal surface which protects it from air and water.
Grease and varnish: it also forms a thin layer on the metal surface preventing it from corrosion.
Alloys: conversion of pure iron to its alloy (which is corrosion resistant) by mixing some impurities.
