Question

Difference between dry corrosion and wet corrosion

Answer 1

Answer:

$\huge\mathfrak\pink{Dry \: Corrosion}$

Dry corrosion occurs when there is no water or moisture to aid the corrosion, and the metal oxidises with the atmosphere alone.

$\huge\mathfrak\purple{Wet\: corrosion}$

Wet corrosion of metals occurs through electron transfer, involving two processes, oxidation and reduction. The other metal, liquid or gas which gains the electrons is called the cathode.

Answer 2

Explanation:

Dry corrosion is defined as the corrosion which does not require any electrolyte for its occurence.

Example: Oxidation of silver

$2Ag+H_2S\rightarrow AgS+H_2$

Wet corrosion is defined as the corrosion which requires an electrolyte for its occurence.

Example: Oxidation of iron called as rusting of iron. Here the water acts as the electrolyte and thus facilitates the movement of electrons from anode to cathode and thus rate of corrosion is much faster in wet corrosion as compared to dry corrosion.

Example : Rusting of iron

$Fe+O_2+H_2O\rightarrow Fe_2O_3.xH_2O$

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