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Question

What is the most common type of corrosion?


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Solution

Corrosion:

  • Wasting away material layer by layer due to the presence of air and moisture in the environment is termed corrosion.
  • Corrosion generally means the oxidation of metals.
  • For example: Rusting of iron

Fe(s)+O2(g)+x.H2O(g)Fe2O3.xH2O(s)(Rust)(Reddishbrownincolour)

  • Corrosion changes the appearance of metals because of the oxide layer that forms on the surface. Like in the above example Iron when corrode changes to reddish-brown. Copper turns green, etc.
  • It also weakens the mechanical power of the metal over time.

Uniform corrosion:

  • The most frequent is corrosion, which occurs uniformly throughout metals.
  • This sort of corrosion is often defined as a chemical reaction that occurs consistently throughout the entire surface of the metal.
  • When a consistent attack occurs, the metal progressively thins down before failing.

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