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What is corrosion? Explain its advantage and disadvantage.

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Corrosion is the decay of metal when it is exposed to the elements in the environment. Scientifically, it is the oxidation of a metal which forms a layer of metal oxide on the top layer. Advantages of corrosion It protects the top layer of the metal. Since the oxide layer is formed on the metal,...
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Corrosion is the decay of metal when it is exposed to the elements in the environment. 

Scientifically, it is the oxidation of a metal which forms a layer of metal oxide on the top layer. 

 

Advantages of corrosion

  • It protects the top layer of the metal. Since the oxide layer is formed on the metal, it prevents it from further oxidation, by protecting the inner layers. It prevents the air and water from seeping into the inner layers of the metal.
  • sacrificial anodes like the zinc metal are used for such processes. It reacts with the oxygen in the air, to form zinc oxide. This zinc oxide acts as a protective layer and prevents the metal from further corrosion.
  • The process of galvanic corrosion is practised, where two metals are in contact electrically, through an electrolyte. One metal erodes preferentially, compared to another. This prevents the actual metal from being corroded.

 

Disadvantages of Corrosion

  • Due to the reaction with oxygen and other elements in the environment, the purity of the metal is hampered.
  •  A major part of the top layer of the metal is lost, due to corrosion
  • It changes the physical appearance of the metal.
  •  It changes the chemical composition and the appearance of a metal
  • Reduces the life span of the metallic objects and is forced to replace it frequently
  • The metal loses its efficiency.
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Maths Tutor

Corrosion means degradation of material due to its reaction with its environment. Corrosion deteriorates physical properties of the metal DISADVANTAGES OF CORROSION — 1. Weakens material due to prolonged corrosive action. 2. loss, contamination, and deterioration of the appearance of a material. 3. safety,...
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Corrosion means degradation of material due to its reaction with its environment. Corrosion deteriorates physical properties of the metal DISADVANTAGES OF CORROSION — 1. Weakens material due to prolonged corrosive action. 2. loss, contamination, and deterioration of the appearance of a material. 3. safety, health and environmental risks due to corrosion, especially in manufacturing plants. 4. Corrosion tends to vent in technical malfunctions in machines. ADVANTAGES OF CORROSION — 1. Corrosion of a material has to be renewed, thus giving scope of continuous demand for materials. 2. Corrosion becomes advantageous when a surface produces an oxide film that will keep corrosion from proceeding further; which happens to aluminum metal. read less
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Teacher

Corrosion is oxidation of iron due to the oxygen in the air. Iron becomes iron oxide which deposits on the surface of iron and we call it rust. Disadvantage-It reduces the tickness of the iron body. It loses strength over the years can become too weak to carry the load it is intended to. Advantage There...
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Corrosion is oxidation of iron due to the oxygen in the air. Iron becomes iron oxide which deposits on the surface of iron and we call it rust.

Disadvantage-It reduces the tickness of the iron body. It loses strength over the years can become too weak to carry the load it is intended to. 

Advantage There is hardly any but we may consider it advantageous when the surface layer of corrosion prevents the inner core material to come in contact with the oxygen in the air and get corroded.

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Experienced and Creative Maths Teacher 7780973011

Corrosion is a degradation process applicable mostly for metals. Just like we call rust for Iron. Unlike plastics, corrosion helps disposed metals to get back into the bio-cycle. Advantages: i. Protection : Surface corrosion forms an oxide layer which further protects the inner metal form corrosion. ii....
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Corrosion is a degradation process applicable mostly for metals. Just like we call rust for Iron. Unlike plastics, corrosion helps disposed metals to get back into the bio-cycle.

Advantages:

i. Protection : Surface corrosion forms an oxide layer which further protects the inner metal form corrosion.

ii. Corrosion prevents corrosion: Some metals like zinc are used as sacrificial anodes to prevent corrosion to other metal.

iii. Galvanic corrosion: The principle on which primary batteries work. In which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte.

Disadvantages Of Corrosion:

1. Weakens material due to prolonged corrosive action.

2. Loss, contamination, and deterioration of the appearance of a material.

3. Safety, health and environmental risks due to corrosion, especially in manufacturing plants.

4. Corrosion tends to vent in technical malfunctions in machines.

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