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Intercrystalline Corrosion
Oct 24, 2018

Intercrystalline corrosion: intergranular boundary is a boundary city of disordered intergranular mixtures of different crystalline orientations. Therefore, they are favorable regions for the precipitation of various solute elements or metal compounds (such as carbide and sulfide) in steel. Therefore, it is not surprising that in some corrosive media, grain boundary may be corroded first. This type of corrosion is called intercrystalline corrosion, and most metals and alloys may present intercrystalline corrosion in a specific corrosive medium. Intercrystalline corrosion is a kind of selective corrosion damage, which differs from the general selective corrosion in that the local property of corrosion is microscale, while macroscopically it is not necessarily local.