The Corrosion Inhibition of Aluminium by Some of 3- alkyloxyaniline Monomeric Surfactants and Their Analogues Polymers in 0.5 M HCl Solution

Corrosion is the destructive result of reaction between a metal or metal alloy and its environ‐ ment [1-3]. Metal atoms in nature are present in chemical compounds (i.e, minerals). The same amounts of energy needed to extract metals from their minerals are emitted during the chemical reactions that produce corrosion. The corrosion process (anodic reaction) of the metal dissolving as ions generates some electrons, are consumed by a secondary process (cathodic reaction). These two processes have to balance their charges. The sites hosting these two processes can be located close to each other on the metal's surface, or far apart depending on the circumstances. The thermodynamic or chemical energy stored in a metal or that is freed by its corrosion varies from metal to metal. It is relatively high for metals such as magnesium, aluminium, and iron, and relatively low for metals such as copper, silver and gold [4]. There are several factors effects on the corrosion process, which classified to factors associated mainly with the metal such as: