what is corrosion explain clearly
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Corrosion is a natural process, which converts a refined metal to a more chemically-stable form, such as its oxide,hydroxide, or sulfide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment. Corrosion engineeringis the field dedicated to controlling and stopping corrosion.
In the most common use of the word, this means electrochemical oxidation of metal in reaction with an oxidant such as oxygen orsulfates. Rusting, the formation of iron oxides, is a well-known example of electrochemical corrosion. This type of damage typically produces oxide(s) or salt(s) of the original metal, and results in a distinctive orange colouration. Corrosion can also occur in materials other than metals, such as ceramicsor polymers, although in this context, the term "degradation" is more common. Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases.
Many structural alloys corrode merely from exposure to moisture in air, but the process can be strongly affected by exposure to certain substances. Corrosion can be concentrated locally to form a pit or crack, or it can extend across a wide area more or less uniformly corroding the surface. Because corrosion is a diffusion-controlled process, it occurs on exposed surfaces. As a result, methods to reduce the activity of the exposed surface, such as passivation and chromate conversion, can increase a material's corrosion resistance. However, some corrosion mechanisms are less visible and less predictable.
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Corrosion is a natural process, which converts a refined metal to a more chemically-stable form, such as its oxide,hydroxide, or sulfide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment. Corrosion engineeringis the field dedicated to controlling and stopping corrosion.
In the most common use of the word, this means electrochemical oxidation of metal in reaction with an oxidant such as oxygen orsulfates. Rusting, the formation of iron oxides, is a well-known example of electrochemical corrosion. This type of damage typically produces oxide(s) or salt(s) of the original metal, and results in a distinctive orange colouration. Corrosion can also occur in materials other than metals, such as ceramicsor polymers, although in this context, the term "degradation" is more common. Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases.
Many structural alloys corrode merely from exposure to moisture in air, but the process can be strongly affected by exposure to certain substances. Corrosion can be concentrated locally to form a pit or crack, or it can extend across a wide area more or less uniformly corroding the surface. Because corrosion is a diffusion-controlled process, it occurs on exposed surfaces. As a result, methods to reduce the activity of the exposed surface, such as passivation and chromate conversion, can increase a material's corrosion resistance. However, some corrosion mechanisms are less visible and less predictable.
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CORROSION
=}The gradual eating away of metals by the usual action of air and water is called as "corrosion".
=}The corrosion of iron is called as"rusting".
=} Corrosion is caused only in the combined action of air and water.
=} It can be prevented by :
Painting-Prevents direct exposure to humid atmosphere.
Oiling or Greasing-Prolongs the longevity of the metal.
Galvanisation (Zinc Plating on metals)-Keeps the metal away from the extreme factors like air , water , chemicals etc.
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HOPE IT HELPS YOU.
☺️☺️☺️
=}The gradual eating away of metals by the usual action of air and water is called as "corrosion".
=}The corrosion of iron is called as"rusting".
=} Corrosion is caused only in the combined action of air and water.
=} It can be prevented by :
Painting-Prevents direct exposure to humid atmosphere.
Oiling or Greasing-Prolongs the longevity of the metal.
Galvanisation (Zinc Plating on metals)-Keeps the metal away from the extreme factors like air , water , chemicals etc.
.....
.....
.....
.....
.....
HOPE IT HELPS YOU.
☺️☺️☺️
jhii
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