Corrosion
Deteriorative loss of a metal as a result of dissolution environmental reactions. It is a transformation process in which the metal passes from its elemental form to a combined (or compound) form.
The simplest example of metallic corrosion is the rusting of iron in air.
Corrosion products are typically oxides, but other products such as sulphides can also form depending on the environment.
Aluminium
Aluminum corrosion characteristics include general white staining (white rust) as well as pitting.
Iron and Ferrous Alloys
Typically, a pH > 8.0 is required to inhibit corrosion of iron and ferrous alloys in water-based fluids.
See also: Cathodic Protection, Corrosion Current Density, Corrosion Inhibitor, Corrosion Potential, Fretting Corrosion, Tubercle, Tuberculation.
Subjects: Electrochemistry Mechanical Engineering