Facts about corrosion?
At normal temperatures iron will not corrode appreciably in the absence of moisture. The presence of oxygen is also essential for corrosion to take place in ordinary water. Oxygen alone will cause considerable corrosion in acid, neutral, or slightly alkaline water. In natural waters, the rate of corrosion is almost directly proportional to oxygen concentration, if other factors do not change. Oxygen also accelerates the corrosion of iron in non-oxidizing acid solutions of moderate strength. source: www.corrosiondoctors.com Corrosion in acid solutions is much more rapid than in neutral solutions, and the latter is more rapid than in alkaline solutions. Hydrogen gas is usually evolved from the surface of the metal during corrosion in acid solutions and in concentrated solutions of alkalies; in nearly neutral solutions the evolution is usually very much less and may not be appreciable. The products of corrosion consist, mainly, of black or green ferrous hydroxide next to the metal, and re
