Localized corrosion

Localized corrosion refers to that the corrosion damage is concentrated on the specific local position of the metal surface, while the corrosion in most other areas is very slight, or even no corrosion.            Local corrosion characteristics:            1. It is difficult to detect the corrosion rate of metal due to its small loss. However, due to the severe corrosion in some areas, sudden corrosion accidents are often caused;            2. There are many kinds of local corrosion;            3. More than 80% of corrosion accidents are caused by local corrosion, so it is difficult to predict and prevent local corrosion rate.            Type of local corrosion:            Pitting corrosion, crevice corrosion, galvanic corrosion, intergranular corrosion, selective corrosion, stress corrosion, hydrogen induced cracking, corrosion fatigue, wear corrosion, etc......