Corrosion is the tendency of metals to return to their natural condition, abandoning their current one, that is: the destruction or deterioration of a material because of chemical and/or electrochemical reactions.
A chemical reaction or dry environment reaction can occur by the contact with vapors or gases, without the presence of liquids. With frequency, the dry environment reaction is closely associated with high temperatures.
A electrochemical reaction or humid environment reaction, is present in liquid atmospheres, by sprayed or immersed means.
Corrosion processes tend to return materials back to a more thermodynamically stable state by their combination with substances in the environment, particularly with oxygen. It is from such a state that the materials were transformed through the metallurgic process of extraction and refinement, by the means of the supply of electric, chemical or heat work.
The most widely used metals for technology have a great affinity for oxygen and their corrosion process depends exclusively on the phenomenon denominated oxidation. Some metals are more prone to oxidation than others.
For example: metals like...
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