Corrosion

As we all know, corrosion is degradation of metal due to its unstable molecule structure. In general, the primary factors that are contributing to corrosion is the condition of the metal itself. It means that if the molecule in the metal is not very stable, so the corrosion of the metal will happen in a very fast rate. The secondary factors that influence the corrosion is the condition of the surrounding which the metal are being kept. If the environment around the metal is not very suitable, the air molecule will react with the metal molecule in a very fast rate. Also, if the air surrounding the metal is corrosive, the corrosion will occur fast. There are many other factors that are leading to corrosion of the metal such as effective electrode potential of a metal in solution. Second is overvoltage of hydrogen on the metal. Third factor is chemical and physical homogeneity of the metal surfaces. Forth is inherent ability to form an insoluble protective film.