Influences of Ultrafine Grain Boundaries on Corrosion Properties of Metals

Grain refinement can effectively strengthen metals. However, accompanied by grain refining, high density of grain boundaries (GBs) will be introduced so as to have effect on the corrosion properties of as-refined materials. In thermodynamic consideration, this review focuses its attention mainly on the influence of ultrafine-grained boundaries on the corrosive behavior. The latest developments of the relationship between corrosion properties and grain sizes as well as grain/twin boundaries (GBs/TBs) are introduced. Further deep study to be in need about the effect of grain size and grain boundaries on the corrosion behavior is pointed out.