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Before considering this type of corrosion, differential aeration define as the difference in the degree of oxygenation, usually by aeration, which can exist in different adjacent media. We say "usually by aeration, because it can also be associated with the difference of oxygen in media with different degrees of moisture, or dry.

Differential aeration Examples include:

- Soils with areas of different degrees of permeability, which can coexist in different concentrations of dissolved air, and therefore, with varying concentrations of oxygen.

- Soils with areas of different humidity, a drier and more humid, so that, for this reason, the amount of oxygen in them is different.

Before considering this type of corrosion, differential aeration define as the difference in the degree of oxygenation, usually by aeration, which can exist in different adjacent media. We say "usually by aeration, because it can also be associated with the difference of oxygen in media with different degrees of moisture, or dry.

Differential aeration Examples include:

- Soils with areas of different degrees of permeability, which can coexist in different concentrations of dissolved air, and therefore, with varying concentrations of oxygen.

- Soils with areas of different humidity, a drier and more humid, so that, for this reason, the amount of oxygen in them is different.

We now define differential aeration corrosion:

When a piece of steel (piping, structure, etc..) Or because he is half-buried, or because you are subjected to different electrolytic media, due to the difference of oxygen resulting from the aforementioned differential aeration, the less oxygen acts as anode and the more oxygenated as cathode, generating a unidirectional electron flow caused by the electrochemical potential difference between the anodic area and the cathodic area, with consequent corrosion in the anodic area.

To study the corrosion by differential aeration chambers are used tests developed by ITC, such as that shown in the attached image.

CCI developed since 1967 under the certification AENOR, chambers of accelerated corrosion tests and climate model for research and quality control. In this regard it is noteworthy that ITC has made this type of test chambers for the entities of the utmost importance and most prestigious research centers exist today, such as the National Center for Metallurgical Research, Empresa Nacional Siderurgica, Department of Defense, Airbus, INTA, etc..