Influence of Varying Grain Size & Microstructural Constituents on the Corrosion Rate of Steel- An Overview

Variation in grain sizes via different approaches affects steel's microstructural properties and corrosion performance. Hence, there is a tendency for internal stress, strain, and texture in the alloyed material. This study established that grain refinement does not necessarily change the corrosion rate, especially for coarse grain size. However, it increases when the refined grain size is deployed into the material. However, the reason for the variation in the corrosion performance behavior of the two types of grains lies in the type of experimental set-up and its application. Subsequently, it was established in this study that the mechanical and microstructural performance of steel depends heavily on the type of grain boundaries. Thus, refined grain boundaries help as surface asperities in materials which eventually improves the microstructure and, most importantly, its corrosion performance in a particular medium.